Page 1 Professional Radio GP Series Detailed Service Manual 6866558D03-O...
Page 3 Professional Radio GP Series Detailed Service Manual 6866558D03-O Contents Section 1 Service Maintainability Section 2 Keypad Service Information Section 3 Power Distribution and Controller Information Section 4 UHF1 Service Information Section 5 UHF2 Service Information Section 6 800MHz Service Information KTT EMEA Publications Department, Jays Close, Viables Industrial Estate, Basingstoke, Hampshire, RG22 4PD, UK.
Page 5: Safety Information
Read this information before using the radio. PRODUCT SAFETY AND RF EXPOSURE FOR PORTABLE TWO-WAY RADIOS. This document provides information and instructions for the safe and efficient operation of Motorola Portable Two-Way Radios. The information provided in this document supersedes information contained in user guides published prior to February 2002.
Page 6 Compliance with RF Exposure Standards Your Motorola two-way radio is designed and tested to comply with a number of national and International standards and guidelines (listed below) for human exposure to radio frequency electromagnetic energy. This radio complies with the IEEE (FCC) and ICNIRP exposure limits for occupational/controlled RF exposure environments at operating duty factors of up to 50% talk- 50% listen and is authorized by the IEEE/ICNIRP for occupational use only.
Page 7 Motorola - approved antennas, batteries and accessories may exceed IEEE/ICNIRP RF exposure guidelines. For a list of Motorola-approved antennas, batteries, and other accessories please see your dealer or local Motorola contact. Your nearest dealer can be found at the following web site: http://www.motorola.com/cgiss/emea/dealerlocator.html Additional Information For additional information on exposure requirements or other training information, visit http://www.motorola.com/rfhealth.
Page 8: Medical Devices
viii ELECTROMAGNETIC INTERFERENCE/COMPATIBILITY NOTE: Nearly every electronic device is susceptible to electromagnetic interference (EMI) if inadequately shielded, designed or otherwise configured for electromagnetic compatibility. Facilities To avoid electromagnetic interference and/or compatibility conflicts, turn off your radio in any facility where posted notices instruct you to do so. Hospitals or health care facilities may be using equipment that is sensitive to external RF energy.
Page 9: Operational Warnings
OPERATIONAL WARNINGS Vehicles with an air bag Refer to vehicle manufacturer's manual prior to installation of electronic equipment to avoid interference with air bag wiring. WARNING: Do not place a portable radio in the area over an air bag or in the air bag deployment area.
Page 10 Warnings for Radios Approved as Intrinsically Safe Radios must ship from the Motorola manufacturing facility with the hazardous atmosphere capability and the intrinsic safety approval labelling (FM, UL, CSA, CENELEC or ATEX). Radios will not be upgraded to this capability and labeled once they have been shipped to the field.
Page 11 The manual PN referenced on the Intrinsically Safe Approval Label identifies the approved Accessories and or options that can be used with that portable radio unit. Using a non Motorola intrinsically safe battery and or accessory with the Motorola approved radio unit will void the intrinsically safe approval of that radio unit.
Page 13 Professional Radio GP Series UHF2 (450 - 527MHz) Service Information Issue: November 2004...
Page 14 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 15: Table Of Contents
Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 GP640/GP680 Model Chart .................1-1 2.0 GP1280 Model Chart ...................1-1 3.0 Technical Specifications ..................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 UHF2 Transmitter ....................2-1 2.1 Power Amplifier ....................2-1 2.2 Antenna Switch....................2-2 2.3 Harmonic Filter ....................2-2 2.4 Antenna Matching Network ................2-2...
Page 16 Chapter 4 UHF2 PCB/SCHEMATICS/PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards ............4-1 1.1 Controller Circuits................... 4-1 1.2 Voice Storage Facility..................4-1 2.0 UHF2 PCB 8485641Z02 Schematics ..............4-3 3.0 UHF2 PCB 8485641Z02 / PCB 8485677Z02 Parts List ........4-11 4.0 UHF2 PCB 8485641Z06 Schematics ..............
Page 17: Chapter 1 Model Chart And Technical Specifications
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS GP640/GP680 Model Chart Professional GP600 Series (UHF2) Model Description MDH25SDC9CK3_E GP640 UHF2 450-527 MHz 4W MDH25SDH9CK6_E GP680 UHF2 450-527 MHz 4W Item Description PMLE4122_ GP640 UHF2 Back Cover Kit PMLE4123_ GP680 UHF2 Back Cover Kit 6864110B14 GP640 Basic User Guide 6864110B19...
Page 18: Technical Specifications
MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specifications Channel Capacity GP640 16 (Conventional) GP680 16 (Conventional) GP1280 16 (Conventional) Power Supply Rechargeable battery 7.5v Dimensions: H x W x D (mm) Height excluding knobs GP640/680 With standard high capacity NiMH battery 137 x 57.5 x 37.5...
Page 19 Technical Specifications Transmitter UHF2 *Frequencies - Full Bandsplit 450-527 MHz Channel Spacing 12.5/20/25 kHz Frequency Stability ±2.5 ppm (-25°C to +55°C, +25° Ref.) Power 450 - 527 MHz: 1-4W ±2.5 @ 12.5 kHz Modulation Limiting ±4.0 @ 20 kHz ±5.0 @ 25 kHz FM Hum &...
Page 20 MODEL CHART AND TECHNICAL SPECIFICATIONS...
Page 21: Chapter 2 Theory Of Operation
Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the UHF circuits in the radio. For details of the theory of operation and trouble shooting for the the associated Controller circuits refer to the Controller Section of this manual.
Page 22: Antenna Switch
THEORY OF OPERATION The LDMOS PA is capable of supplying an output power of 7W with an input signal of 0.3W. The current drain is typically 1300mA while operating in the frequency range of 450-527MHz. The power output can be varied by changing the bias voltage. Antenna Switch The antenna switch circuit consists of two pin diodes (CR101 and CR102), a pi network (C107, L104 and C106), and two current limiting resistors (R101 and R170).
Page 23: Uhf2 Receiver (All Models Except Those With Pcb 8486686Z02)
UHF Receiver (all models except those with PCB 8486686Z02) UHF Receiver (all models except those with PCB 8486686Z02) The UHF receiver consists of a front end, back end, and automatic gain control circuits. A block diagram of the receiver is shown in Figure 2-2. Detailed descriptions of these features are contained in the paragraphs that follow.
Page 24: Receiver Back-End
THEORY OF OPERATION The output of the bandpass filter is coupled to the RF amplifier transistor Q301 via C307. After being amplified by the RF amplifier, the RF signal is further filtered by a second varactor tuned bandpass filter, consisting of L306, L307, C313, C317, CR304 and CR305. Both the pre and post-RF amplifier varactor tuned filters have similar responses.
Page 25: Automatic Gain Control (Agc)
UHF Receiver (all models except those with PCB 8486686Z02) Automatic Gain Control (AGC) ( Refer to the UHF Receiver Front End and Receiver Back End schematic diagrams ) The front end automatic gain control circuit provides automatic reduction of gain, of the front end RF amplifier via feedback.
Page 26: Uhf2 Receiver (Models With Pcb 8486686Z02)
THEORY OF OPERATION UHF Receiver (Models with PCB 8486686Z02) The UHF receiver consists of a front and back end. A block diagram of the receiver is shown in Figure 2-3. Detailed descriptions of these features are contained in the paragraphs that follow. Antenna Pin Diode Varactor...
Page 27: Receiver Back-End
UHF Receiver (Models with PCB 8486686Z02) The output of the bandpass filter is coupled to the RF amplifier transistor Q301 via C307. After being amplified by the RF amplifier, the RF signal is further filtered by a second varactor tuned bandpass filter, consisting of L306, L307, C313, C317, CR304 and CR305.
Page 28: Frequency Generation Circuit
THEORY OF OPERATION Frequency Generation Circuit ( Refer to Figure 2-4 and the UHF Frequency Synthesizer schematic diagram ) The frequency generation circuit, shown in Figure 2-4, is composed of Fractional-N synthesizer U201 and VCO/Buffer IC U241. Designed in conjunction to maximize compatibility, the two ICs provide many of the functions that normally require additional circuitry.
Page 29: Synthesizer
Frequency Generation Circuit Synthesizer ( Refer to Figure 2-5 and the UHF Synthesizer schematic diagram) The Fractional-N synthesizer, shown in Figure 2-5, uses a 16.8MHz crystal (FL201) to provide a reference for the system. The LVFractN IC (U201) further divides this to 2.1MHz, 2.225MHz, and 2.4MHz to be used as reference frequencies.
Page 30: Voltage Controlled Oscillator (Vco)
2-10 THEORY OF OPERATION Voltage Controlled Oscillator (VCO) ( Refer to Figure 2-6 and the UHF Voltage Controlled Oscillator schematic diagram) The VCOB IC (U241), shown in Figure 2-6, in conjunction with the Fractional-N synthesizer (U201) generates RF in both the receive and the transmit modes of operation. The TRB line (U241 pin 19) determines which oscillator and buffer are enabled.
Page 31 Frequency Generation Circuit 2-11 Table 2-1 Level Shifter Logic Desired AUX 4 AUX 3 Mode High (@3.2V) High (@4.8V) High Battery Saver Hi-Z/Float (@2.5V) In the receive mode, U241 pin 19 is low or grounded. This activates the receive VCO by enabling the receive oscillator and the receive buffer of U241.
Page 32: Voice Storage (Gp1280 Only)
2-12 THEORY OF OPERATION Voice Storage (GP1280 Only) ( Refer to Figure 2-7 and the UHF Voice Storage schematic diagram) The Voice Storage feature is offered as standard in the GP1280 and as an Option board for GP340/GP360/GP380 and GP640/GP680 models. The Voice Storage feature enables users to: ■...
Page 33 Voice Storage (GP1280 Only) 2-13 Audio routing to the Voice Storage circuitry during receive message recording, message playback, personal memo recording and voice prompt transmit over the air are as follows: Received Message Recording The receive audio is tapped from the Rx_Aud_Rtn pin of the ASFIC_CMP during receive mode. Message Playback Message playback is via the FLAT_RX_SND pin of ASFIC_CMP.
Page 34 2-14 THEORY OF OPERATION...
Page 35: Chapter 3 Troubleshooting Charts
Chapter 3 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (All models except those with PCB 8486686Z02) (Sheet 1 of 2) START Bad SINAD Bad 20dB Quieting No Recovered Audio udio Check Controller at pin 27 of U301? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q320 bias...
Page 36: Troubleshooting Flow Chart For Receiver (All Models Except Those With Pcb 8486686Z02)(Sheet 2 Of 2)
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (All models except those with PCB 8486686Z02) (Sheet 2 of 2) Inject RF into J101 Q302 Trace IF signal collector OK? IF Signal from L311 to IF signal at L311? Q302. Check for present? bad XTAL filter.
Page 37 Troubleshooting Flow Chart for Receiver (Models with PCB 8486686Z02) (Sheet 1 of 2) Troubleshooting Flow Chart for Receiver (Models with PCB 8486686Z02) (Sheet 1 of 2) START Bad SINAD Bad 20dB Quieting No Recovered Audio Check Controller Audio at pin 8 of U301? Spray or inject 1st IF 44.85 MHz into...
Page 38: 8486686Z02)(Sheet 2 Of 2)
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Models with PCB 8486686Z02) (Sheet 2 of 2) Inject RF into J101 Trace IF signal Q302 collec- from L311 to IF Signal at tor OK? Q302. Check for L311? IF signal bad XTAL filter. present? Before replacing U301, check...
Page 39: Troubleshooting Flow Chart For Transmitter
Troubleshooting Flow Chart for Transmitter Troubleshooting Flow Chart for Transmitter START No Power Is There B+ Bias for Check Q111 Ant switch CR101 Is Control Voltage Is Current Check PCIC High or Low at C119 High 1. Check Pin Diodes Check Drive to 2.
Page 40: Troubleshooting Flow Chart For Synthesizer
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Synthesizer 3.3V at Check U248, Start U201 pins 5, L201 & L202 20, 34& Check CR201, Visual U210, U211, Correct check of the C258, C259 & Problem Board OK? C228 Is U201 16.8MHz 16.8MHz at pin 6 of Pin47 AT = Replace...
Page 41: Troubleshooting Flow Chart For Vco
Troubleshooting Flow Chart for VCO Troubleshooting Flow Chart for VCO START No LO? U241 Check R245 TRB = Pin 10 for dry joint 5V? @U241 Carrier? >1V? or faulty Pin 19 VCO OK L253 Change Open L253 Circuit? AUX 3 Check High? R260...
Page 42: Troubleshooting Flow Chart For Receive Message/Personal Memo Recording
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receive Message/Personal Memo Recording Cannot Receive Message Personal Memo Recording Check menu Turn on Check Mic I/P at whether record “Record Incoming J403-18 any audio? incoming messages Call” turned on Check Spkr/Mic Flex Connection J403 Check J400-34 Any audio?
Page 43: Troubleshooting Flow Chart For Message Playback
Troubleshooting Flow Chart for Message Playback Troubleshooting Flow Chart for Message Playback Cannot Playback Message Check keypad/ Assemble controller flex properly interconnect ok? Change U700 or Voice Storage Audio at J400-35? Option Board Change U404...
Page 44 3-10 TROUBLESHOOTING CHARTS...
Page 45 Chapter. The Voice Storage facility may be fitted to other radios in the GP Series as an option board; reference must be made to the Option Board manual in this case. The Voice Storage schematic and the related PCBs are shown in Tables 4-3 and 4-4 below.
Page 46 UHF2 PCB/SCHEMATICS/PARTS LISTS Table 4-3 UHF2 GP1280 Drawings and Parts Lists PCB : 8485677Z02 Main Board Top Side Page 4-27 Main Board Bottom Side Page 4-28 SCHEMATICS Controls and Switches Page 4-5 Receiver Front End Page 4-6 Receiver Back End Page 4-7 Synthesizer Page 4-8...
Page 47: Uhf2 Pcb 8485641Z02 Schematics
UHF2 PCB 8485641Z02 Schematics UHF2 PCB 8485641Z02 Schematics R410 E407 E409 PB503 PB502 PB504 PB501 R437 VR440 C521 SH323 R300 R352 C397 FL201 RT301 R314 R321 FL301 VR501 C363 C328 C325 R335 C362 U405 L332 U406 TP201 R338 L325 J400 R506 R325 C385...
Page 48 UHF2 PCB 8485641Z02 Schematics C523 C522 SH402 E405 SH322 C437 L505 E404 VR506 L330 C359 E406 C277 C338 S502 C358 Y201 C357 R350 C344 E402 C390 C278 FL401 U248 R344 C383 C360 R415 U301 R311 B501 C346 C361 R312 C215 C433 U409 C343...
Page 49 UHF2 PCB 8485641Z02 Schematics B501 L505 BATTERY_CONTACT 390nH RADIO_CODE 2 DATA UNSWB+ BATT_CODE 1 NEG BATT + 3 POS F501 S502 CONN_J SWITCH BATT – MECH_SWB+ LI_ION B503 B504 C502 VR506 CR501 VR439 C503 0.47uF 6.8V 100pF Vdda R507 Vdda C505 6.8V VR501...
Page 50 UHF2 PCB 8485641Z02 Schematics DACRx C322 82pF R342 [email protected] 100K L310 150nH C315 R310 R308 R305 C314 100pF 0.1uF R304 C380 R309 .01uF [email protected] C321 CR306 L304 [email protected] 100pF 180nH C306 T301 XFMR C309 C308 100pF R306 R307 100pF C312 100K 100K C316...
Page 51 UHF2 PCB 8485641Z02 Schematics L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C345 C344 C346 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 2.628V 3.185V C342 Q320 C357 C384 C383 BFQ67W 56pF...
Page 52 UHF2 PCB 8485641Z02 Schematics U210 U211 TC7ST04FU C296 C265 C257 TC7ST04FU 0.1uF 100pF C258 .01uF U247 ADP3300 SWB+ C259 .01uF (SOURCE) CR201 C294 C293 C291 0.47uF 100pF 0.47uF 4V_3.3V L202 U248 2.2uH LP2980 L203 C277 C278 2.2uH C229 100pF 2.2uF C230 C228 100pF...
Page 53 UHF2 PCB 8485641Z02 Schematics C281 R245 100pF R242 C250 L243 4.3pF C276 C285 C286 4.6V 2.2uF 100pF RESONATOR 0.1uF C246 L281 L273 100pF R241 390nH 18nH C242 4.3pF C272 C273 1.1pF 0.1uF C243 L271 L242 R244 4.3pF 27nH 22nH C245 RX_INJ 2.7pF TX_INJ...
Page 54 UHF2 PCB 8485641Z02 Schematics 4-10 E101 BEAD R102 UNSWB+ L107 C114 C123 C108 33.47nH 100pF 10uF 100pF L105 390nH C172 UNSWB+ 0.1uF R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 L108 L109 C121 C160 L112 4.22nH 11.03nH 100pF 390nH 56pF Q110 Microstrip C118...
Page 55: Uhf2 Pcb8485641Z02 / Pcb8485677Z02 Parts List
UHF2 PCB8485641Z02 / PCB8485677Z02 Parts List 4-11 UHF2 PCB8485641Z02 / Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description PCB8485677Z02 Parts List Part No. Part No. Part No. C170 2113743N50 100pF C264 2113743N50 100pF C331 2113743N50 100pF Circuit Motorola Description...
Page 56 UHF2 PCB8485641Z02 / PCB8485677Z02 Parts List 4-12 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C400 2113743L41 .01uF, 10% C471 2113743LN50 100pF D401 4802245J62 Diode Schottky, RB731U L282...
Page 57 5.6V Zener R281 Not Placed R355 0662057M01 R481 0662057N08 R300 0662057M82 2.2K R400 0662057N15 R492 0662057M01 * Motorola Depot Servicing only R301 0662057N23 100K R401 0662057M01 R501 0662057M70 Reference designators with an asterisk indicate R302 0662057N23 100K R402 Not Placed...
Page 58 UHF2 PCB8485641Z02 / PCB8485677Z02 Parts List 4-14 Intentionally Left Blank...
Page 59: Uhf2 Pcb 8485641Z06 Schematics
UHF2 PCB 8485641Z06 Schematics 4-15 UHF2 PCB 8485641Z06 Schematics M400 M101 M301 C523 C522 VR442 VR441 C436 E404 C437 E405 R426 L505 C334 C345 R420 E406 R343 VR506 L330 C359 E403 C382 C277 L331 S502 C338 C330 R414 Q302 C358 Y201 B501 E402...
Page 60 UHF2 PCB 8485641Z06 Schematics 4-16 R410 C423 E407 E409 PB503 PB502 PB504 PB501 R437 E408 R418 C505 VR440 C521 SH323 R300 C502 R352 VR444 C397 FL201 B503 B504 R351 R334 RT301 R316 R507 R314 FL301 R321 CR310 VR501 C328 C362 C363 R335 C325...
Page 61 UHF2 PCB 8485641Z06 Schematics 4-17 B501 L505 BATTERY_CONTACT 390nH RADIO_CODE 2 DATA UNSWB+ BATT_CODE 1 NEG BATT + F501 3 POS S502 CONN_J SWITCH BATT – MECH_SWB+ LI_ION B503 VR506 B504 C502 CR501 VR439 C503 0.47uF 6.8V 100pF Vdda R507 Vdda C505 6.8V...
Page 62 UHF2 PCB 8485641Z06 Schematics 4-18 DACRx C322 82pF R342 [email protected] 100K L310 150nH C315 R310 R308 R305 C314 100pF 0.1uF R304 R309 C380 .01uF [email protected] C321 CR306 L304 [email protected] 100pF C306 T301 180nH XFMR C309 C308 100pF R306 R307 100pF C312 100K 100K...
Page 63 UHF2 PCB 8485641Z06 Schematics 4-19 L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C345 C344 C346 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 2.628V 3.185V Q320 C342 C357 C383 C384 BFQ67W...
Page 64 UHF2 PCB 8485641Z06 Schematics 4-20 U210 U211 TC7ST04FU C296 C265 C257 TC7ST04FU 0.1uF 100pF C258 .01uF U247 ADP3300 SWB+ C259 .01uF (SOURCE) CR201 C294 C293 C291 0.47uF 100pF 0.47uF L202 4V_3.3V U248 2.2uH LP2980 L203 C277 C278 2.2uH 100pF C230 C229 2.2uF C228...
Page 65 UHF2 PCB 8485641Z06 Schematics 4-21 C281 R245 100pF R242 C250 L243 4.3pF C276 C285 C286 4.6V 2.2uF 100pF 0.1uF RESONATOR C246 L281 L273 100pF R241 390nH 18nH C242 4.3pF C272 C273 1.1pF 0.1uF C243 L271 L242 R244 4.3pF 27nH 22nH C245 RX_INJ 2.7pF...
Page 66 UHF2 PCB 8485641Z06 Schematics 4-22 E101 R102 BEAD UNSWB+ L107 C123 10uF 33.47nH C114 100pF C172 C109 L106 0.1uF UNSWB+ 100pF 7.66nH Microstrio TX_OUT R106 Microstrio Q110 R172 C121 C160 L112 L108 R191 R175 100pF 56pF 4.22nH 390nH Microstrio C118 C111 C112 C113...
Page 67: Uhf2 Pcb8485641Z06 Parts List
UHF2 PCB8485641Z06 Parts List 4-23 UHF2 PCB8485641Z06 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C170 2113743N50 100pF C257 2113743N50 100pF C324 2113743N33 20pF Part No. C171 2113743N50...
Page 68 UHF2 PCB8485641Z06 Parts List 4-24 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C385 2113743N44 56pF C448 2113928N01 0.1uF , 10% CR201 4802233J09 Triple diode (SOT 25) L114...
Page 69 UHF2 PCB8485641Z06 Parts List 4-25 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. Q210 4802245J50 Dual NPN/PNP transistor R233 0662057M68 R338 NOT PLACED R448 0662057M98 Q241 4805218N63 RF NPN transistor...
Page 70 UHF2 PCB8485641Z06 Parts List 4-26 * Motorola Depot Servicing only Circuit Motorola Description Reference designators with an asterisk indicate Part No. components which are not fieldreplaceable SH402 2680515Z01 Microprocessor shield because they need to be calibrated with SH403 2680516Z01 Asfic_Cmp/Audio PA shield specialized factory equipment after installation.
Page 71: Uhf2 Pcb 8485677Z02
UHF2 PCB 8485677Z02 (GP1280) Schematics 4-27 UHF2 PCB 8485677Z02 (GP1280) Schematics R410 E407 E409 PB502 PB501 PB503 PB504 R437 VR440 SH323 C521 R300 R352 C397 FL201 VR501 R314 RT301 R321 C328 C325 C362 C363 R335 U405 U406 R338 TP201 L325 J400 R506 C385...
Page 72 UHF2 PCB 8485677Z02 (GP1280) Schematics 4-28 M400 C523 C522 E405 C437 L505 E404 VR506 C359 L330 E406 R703 C709 C708 C277 C338 R415 S502 C358 C357 R350 C344 C390 E402 C278 R344 C383 U248 C360 U301 R311 C719 C438 C346 C361 R312 C215...
Page 73 UHF2 PCB 8485677Z02 (GP1280) Schematics 4-29 Vddd CR700 3.29V C703 100pF C701 C702 0.1uF IF_CLK_1_VOICE XCLK SCLK C704 0.1uF ANA_NEG AUDOUT ANA_POS IF_VS_CS_1_VOICE Vddd VS_CS IF_DATA_1_VOICE MOSI DATA U700 MISO C707 C706 ISD33000 0.1uF IF_MISO_1_VOICE MISO IF_VS_INT_1_VOICE AMCAP R708 VS_INT 560K IF_VS_RAC_1_VOICE IF_RX_AUD_RTN_1_VOICE...
Page 74 Voice Storage Parts List (GP1280) 4-30 Voice Storage Parts List (GP1280) * Motorola Depot Servicing only Reference designators with an asterisk indicate components which are not fieldreplaceable Circuit Motorola Description because they need to be calibrated with Part No. specialized factory equipment after installation.
Page 75 UHF2 PCB 8485677Z03 (GP1280) Schematics 4-31 UHF2 PCB 8485677Z03 (GP1280) Schematics R410 E409 PB504 PB503 PB502 PB501 R437 E407 VR440 SH323 R300 C521 R352 C397 RT301 R314 R321 VR501 C363 C328 C362 C325 R335 U405 L325 TP201 J400 R338 R506 C385 R325 C353...
Page 76 UHF2 PCB 8485677Z03 (GP1280) Schematics 4-32 M401 M300 M100 R132 R131 SH403 R471 C415 R130 Q410 CR105 R109 C440 C373 C430 R349 C476 R436 C414 Q111 Q310 C133 C450 C451 C172 R172 R330 R331 L281 C410 CR241 J101 R704 C371 C372 C409 CR243 R101...
Page 77: Uhf2 Pcb 8485677Z03
UHF2 PCB 8485677Z03 (GP1280) Parts List 4-33 UHF2 PCB 8485677Z03 (GP1280) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Parts List Ref. Part No. Ref. Part No. Ref. Part No. Circuit Motorola C135 2113743M08 22000pF C223 2113743M24 100000pF C279 2104993J02 2.2uF...
Page 78 UHF2 PCB 8485677Z03 (GP1280) Parts List 4-34 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C324 2113743N33 20pF C364 2113743L41 10000pF C403 2113743G24 2.2uF...
Page 79 UHF2 PCB 8485677Z03 (GP1280) Parts List 4-35 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C514 2113743N50 100pF CR304 4862824C01 Varactor L105 2462587N22 390nH...
Page 80 UHF2 PCB 8485677Z03 (GP1280) Parts List 4-36 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R104 0662057N15 R252 0662057M60 R332 NOTPLACED R421 0662057M81 R106...
Page 81 U102 5185765B26 PCIC VR506 4802245J73 Zener Diode 6.8V R703 0662057M74 U201 5185963A27 LVFRACN Synthesizer IC * Motorola Depot Servicing only R704 0662057N13 U210 5102463J61 Inverter Reference designators with an asterisk indicate components which are not fieldreplaceable R705 0662057N13 U211 5102463J61...
Page 82 UHF2 PCB 8485677Z03 (GP1280) Parts List 4-38 Intentionally Left Blank...
Page 83: 10.0 Uhf2 Pcb 8486686Z02 Schematics
UHF2 PCB 8486686Z02 Schematics 4-39 10.0 UHF2 PCB 8486686Z02 Schematics R410 C521 E407 E409 R437 C338 FL302 C325 VR501 C349 U405 TP201 J400 R506 SH201 C324 C220 Q505 L311 U247 R355 R505 SH323 L203 C426 C425 C260 C512 C513 Q502 C352 Q210 R310...
Page 84 UHF2 PCB 8486686Z02 Schematics 4-40 R132 R131 SH403 C415 R130 CR105 Q410 R109 C430 C440 C373 C414 C133 R349 C476 R436 C172 Q111 Q310 R172 C451 C450 R330 R331 L281 C410 J101 C371 C372 CR241 C409 C445 C138 R101 C151 CR243 U420 U404...
Page 85 UHF2 PCB 8486686Z02 Schematics 4-41 RADIO_CODE BATTERY_CONTACT L505 UNSWB+ B501 390nH BATT_CODE DATA BATT+ F501 S502 BATT- CONN_J SWITCH MECH_SWB+ LI_ION B503 TAB2 B504 VR439 C503 VR506 C502 CR501 TAB1 6.8V 100pF 0.47uF R507 C505 6.8V VR501 100pF Vdda PB501 SWITCH VR440 C521...
Page 86 UHF2 PCB 8486686Z02 Schematics 4-42 DACRx C322 82pF R342 100K L310 150nH C315 R308 R310 R305 C314 100pF 0.1uF R304 R309 C380 .01uF L304 C321 CR306 180nH 100pF C306 T301 XFMR C309 C308 R307 100pF R306 100pF 100K 100K C312 C310 C318 C316...
Page 87 UHF2 PCB 8486686Z02 Schematics 4-43 U302-1 TC7W04F C352 R345 R360 0.1uF FL303 U302-4 CFWC455E U302-3 PWR_GND TC7W04F OUT 2 R355 100K U302-2 TC7W04F BW_SEL C362 CR312 R321 R324 CR313 FL304 0.1uF 120K CFWC455G OUT 2 R361 R350 R358 C329 0.1uF C357 0.1uF FL302...
Page 88 UHF2 PCB 8486686Z02 Schematics 4-44 U211 TC7ST04FU U210 TC7ST04FU C257 C296 C265 0.1uF 100pF C258 .01uF U247 ADP3300 C259 SWB+ .01uF (SOURCE) CR201 C291 0.47uF C294 C293 4V_3.3V L202 100pF 0.47uF U248 2.2uH LP2980 L203 C277 C278 2.2uH 100pF 2.2uF C229 C230 C228...
Page 89 UHF2 PCB 8486686Z02 Schematics 4-45 C281 R245 100pF R242 C250 C286 C285 L243 C276 4.3pF 0.1uF 100pF 2.2uF RESONATOR C246 L273 R241 L281 100pF 18nH 390nH C242 4.3pF C272 1.1pF C273 0.1uF C243 L271 L242 R244 4.3pF 22nH 27nH RX_INJ C245 2.7pF TX_OUT...
Page 90 UHF2 PCB 8486686Z02 Schematics 4-46 E101 BEAD R102 UNSWB+ L107 C123 33.47nH 10uF C114 100pF C172 0.1uF C109 L106 UNSWB+ 100pF 7.66nH TX_OUT R106 Microstrip Microstrip Q110 R172 C160 L108 R191 L112 R175 C121 56pF 4.22nH 100pF 390nH Microstrip C118 100pF C111 C181...
Page 91 UHF2 PCB 8486686Z02 Schematics 4-47 ANT_BIAS SH100 C108 SHIELD 100pF L105 390nH TX_OUT HF SHIELD CR101 L104 L101 L102 12.39nH 12.39nH 12.39nH RX_IN CR102 C101 C102 C103 C104 C106 C107 100pF 6.2pF 13pF 6.2pF 4.7pF 3.3pF C188 R170 36pF RF_JACK R101 UHF2 (450-527 MHz) Harmonic Filter...
Page 92 UHF PCB 8486686Z02 Parts List 4-48 11.0 UHF PCB 8486686Z02 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C170 2113743N50 100pF C258 2113743L41 10000pF C326 2113743M24 100000pF Part No.
Page 93 UHF PCB 8486686Z02 Parts List 4-49 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C410 2113928N01 0.1uF C482 2113928N01 0.1uF CR501 4880107R01 Rectifier L261 2462587V29 39nH C411 2113743M24...
Page 94 UHF PCB 8486686Z02 Parts List 4-50 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. R104 0662057N15 R309 0662057M01 R405 0662057M01 R481 0662057N08 R106 0662057M26 R310 NOTPLACED R406 0662057N20...
Page 95 455kHz Ceramic Discriminator 1485777Z01 Insulator (KAPTON) 8486686Z02 UHF B2 PC Board * Motorola Depot Servicing only Reference designators with an asterisk indicate components which are not fieldreplaceable because they need to be calibrated with specialized factory equipment after installation. Radios in which these parts have been replaced in the field will be off frequency at temperature extremes.
Page 96 UHF PCB 8486686Z02 Parts List 4-52 Intentionally Left Blank...
Page 97 Professional Radio GP Series Service Maintainability Issue: November 2004...
Page 98 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 99 Table of Contents Chapter 1 INTRODUCTION 1.0 Scope of Manual ....................1-1 2.0 Warranty and Service Support................1-1 2.1 Warranty Period and Return Instructions ............1-1 2.2 After Warranty Period ..................1-1 2.3 European Radio Support Centre (ERSC)............1-2 2.4 Piece Parts .....................1-2 2.5 Technical Support...................1-3 2.6 Related Documents ..................1-3 3.0 Radio Model Information..................1-4 Chapter 2...
Page 101: Chapter 1 Introduction
In instances where the product is covered under a "return for replacement" or "return for repair" warranty, a check of the product should be performed prior to shipping the unit back to Motorola. This is to ensure that the product has been correctly programmed or has not been subjected to damage outside the terms of the warranty.
Page 102: European Radio Support Centre (Ersc)
Aftermarket and Accessory Division (AAD). If no part number is assigned, the part is not normally available from Motorola. If the part number is appended with an asterisk, the part is serviceable by Motorola Depot only. If a parts list is not included, this generally means that no user-serviceable parts are available for that kit or assembly.
Page 103: Technical Support
Warranty and Service Support Technical Support Motorola Product Services is available to assist the dealer/distributors in resolving any malfunctions which may be encountered. UK/Ireland - Richard Russell France - Lionel Lhermitte Telephone: +44 (0) 1256 488 082 Telephone: +33 1 6929 5722...
Page 104: Radio Model Information
INTRODUCTION Radio Model Information The model number and serial number are located on a label attached to the back of your radio. You can determine the RF output power, frequency band, protocols, and physical packages. The example below shows one portable radio model number and its specific characteristics. Table 1-1 Radio Model Number (Example: MDH25KDC9AA3AE) Type of Model...
Page 105: Chapter 2 Maintenance
Chapter 2 MAINTENANCE Introduction This chapter of the manual describes: ❏ preventive maintenance ❏ safe handling of CMOS devices ❏ repair procedures and techniques Preventive Maintenance The radios do not require a scheduled preventive maintenance program; however, periodic visual inspection and cleaning is recommended. Inspection Check that the external surfaces of the radio are clean, and that all external controls and switches are functional.
Page 106: Safe Handling Of Cmos And Ldmos
When damaged parts are replaced, identical parts should be used. If the identical replacement component is not locally available, check the parts list for the proper Motorola part number and order the component from the nearest Motorola Communications parts center listed in the “Piece Parts”...
Page 107 Chip Components Use either the RLN4062 Hot-Air Repair Station or the Motorola 0180381B45 Repair Station for chip component replacement. When using the 0180381B45 Repair Station, select the TJ-65 mini-thermojet hand piece. On either unit, adjust the temperature control to 370 °C (700 °F), and adjust the airflow to a minimum setting.
Page 108 MAINTENANCE Shields Removing and replacing shields will be done with the R1070 station with the temperature control set to approximately 215°C (415°F) [230°C (445°F) maximum]. ❏ To remove the shield: Place the circuit board in the R1070 circuit board holder. Select the proper heat focus head and attach it to the heater chimney.
Page 109: Notes For All Schematics And Circuit Boards
1. Unless otherwise stated, resistances are in Ohms (k = 1000), and capacitances are in picofarads (pF) or microfarads (µF). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multimeter or equivalent. Transmitter measurements should be made with a 1.2 µF choke in series with the voltage probe to prevent circuit loading.
Page 110 MAINTENANCE...
Page 111: Chapter 3 Service Aids
Table 3-1 lists the service aids recommended for working on the radio. While all of these items are available from Motorola, most are standard workshop equipment items, and any equivalent item capable of the same performance may be substituted for the item listed.
Page 112 SERVICE AIDS Table 3-2 lists the recommended tools used for maintaining this family of radios. These tools are also available from Motorola.. Table 3-2 Recommended Test Tools Motorola Part Description Application Number 6680702Z01 Chassis opener and knob Disassembly tool removal tool.
Page 113: Recommended Test Equipment
Test Equipment Test Equipment Table 3-3 lists test equipment required to service the radio and other two-way radios. Table 3-3 Recommended Test Equipment Motorola Part Description Characteristics Application Number R2600_ Comms System Analyzer This monitor will Frequency/deviation meter and (non MPT).
Page 114 SERVICE AIDS Motorola Part Description Characteristics Application Number * R1440_ Wattmeter, Thruline 50-Ohm, Transmitter power output ±5% accuracy measurements. * 0180305F14 Plug-in Element 10W, 25 - 60MHz * 0180305F29 Plug-in Element 5W, 100-250MHz * 0180305F38 Plug-in Element 5W, 200-500MHz * 0180305F46...
Page 115 Professional Radio GP Series Keypad and Flex Service Information Issue: November 2004...
Page 116 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 117 Table of Contents Chapter 1 THEORY OF OPERATION 1.0 Keypad and Flexible Connectors .................1-1 1.1 Keypad ......................1-1 1.2 Flexible Connectors..................1-1 2.0 Troubleshooting Chart ..................1-2 Chapter 2 PCB / SCHEMATICS / PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards ............2-1 1.1 Flexible Connectors..................2-1 1.2 Keypad PCBs ....................2-1 2.0 PCB/Schematic Diagrams and Parts List: Flexes..........2-3...
Page 119: Keypad And Flexible Connectors
Chapter 1 THEORY OF OPERATION Keypad and Flexible Connectors Keypad The keypad block diagram is shown in Figure 1-1. U602 is a comparator that will compare the voltage when any one of the keypad row or keypad column keys is being pressed. Therefore when a key is being pressed, it will send a message to the microprocessor through the output (KEY_INT) telling it that a key has been pressed.
Page 120: Troubleshooting Chart
THEORY OF OPERATION Troubleshooting Chart Disconnect and Display reconnect 18-pin flex if still Off Disconnect and Keypad reconnect 40-pin flex Figure 1-2 Keypad Board Troubleshooting Chart...
Page 121: Allocation Of Schematics And Circuit Boards
Chapter 2 PCB / SCHEMATICS / PARTS LISTS Allocation of Schematics and Circuit Boards The printed circuit boards (PCB) and schematic diagrams related to the Flexible Connectors and the Keypads are shown in the tables below: Flexible Connectors Table 2-1: Keypad /Controller Flex Flex : 8480475Z02 Flex...
Page 122 PCB / SCHEMATICS / PARTS LISTS...
Page 123: Pcb/Schematic Diagrams And Parts List: Flexes
PCB/Schematic Diagrams and Parts List: Flexes PCB/Schematic Diagrams and Parts List: Flexes Keypad - Controller Flex CONTROLLER KEYPAD J100 J200 EXT_MIC EXT_MIC VS_CS VS_CS SW_B+ SW_B+ <- TO KP Vddd Vddd VS_AUDSEL VS_AUDSEL Det_Aud_Snd Det_Aud_Snd Rx_Aud_Rtn Rx_Aud_Rtn Tx_Aud_Snd Tx_Aud_Snd TO CTRL -> Tx_Aud_Rtn 8480475Z02 REV A Tx_Aud_Rtn...
Page 124: Universal Connector Flex
PCB/Schematic Diagrams and Parts List: Flexes Universal Connector Flex M400 J404 SPKR_20 J405 J403 J406 20 PIN CONN J407 SPKR_20 J408 J409 J410 J411 J412 INT_SPK+ 13 PIN UNIVERSAL CONN J413 M401 J414 INT_SPK- J415 J416 SPKR_20 EXT_SPKR+ J404 EXT_SPKR+ C402 SPKR_20 EXT_SPK-...
Page 125: Pcb/Schematic Diagrams And Parts List: Keypad
PCB/Schematic Diagrams and Parts List: Keypad PCB/Schematic Diagrams and Parts List: Keypad PCB 8480574Z06 - Diagram R615 R614 M604 M605 M606 R617 R616 D601 D602 R620 M607 M609 R621 M608 C614 R626 R606 J602 M610 M611 M612 C642 D604 C640 C644 R601 D605 R631...
Page 126 PCB/Schematic Diagrams and Parts List: Keypad Vddd C618 C617 100pF E637 40 PIN CONNECTOR C622 100pF C610 EXT_MIC EXT_MIC J601-1 ROW3 ROW5 ROW4 M606 100pF VS_CS J601-2 VS_CS M604 M605 R614 SWITCH SWB+ J601-3 SW_B+ SWITCH SWITCH R632 C621 C620 C619 J601-4 Vddd...
Page 127: Pcb 8480574Z06 - Parts List
PCB/Schematic Diagrams and Parts List: Keypad PCB 8480574Z06 - Parts List Circuit Motorola Circuit Motorola Description Description Part No. Part No. Circuit Motorola Description E637 2480640Z01 C/IND BK1005HM471 BEAD R631 0662057M01 0 5% 20X40 Part No. E638 2480640Z01 C/IND BK1005HM471 BEAD...
Page 128: Pcb 8480682Z04 - Diagrams
PCB/Schematic Diagrams and Parts List: Keypad PCB 8480682Z04 - Diagrams M601 M602 M603 R643 R629 M604 M606 M605 R631 R633 R634 R641 M607 M609 R626 R624 E616 E620 R630 R627 R606 E614 M608 E613 E618 R632 E609 Q604 R602 R603 J602 C601 M612...
Page 129 PCB/Schematic Diagrams and Parts List: Keypad ROW5 ROW3 ROW4 M601 M602 M603 SWITCH SWITCH SWITCH OUT1 OUT1 OUT1 OUT2 OUT2 OUT2 C606 100pF 40 PINS CONNECTOR SWB+ COL4 EXT_MIC EXT_MIC J601-1 VS_CS VS_CS J601-2 C607 SW_B+ ROW3 ROW4 ROW5 SWB+ J601-3 1000pF R607...
Page 130: Pcb 8480682Z04 - Parts List
2-10 PCB/Schematic Diagrams and Parts List: Keypad PCB 8480682Z04 - Parts List Circuit Motorola Description Part No. Circuit Motorola Description Q604 4813824A10 NPN 40V .2A GEN PURP Part No. Q605 4813824A10 NPN 40V .2A GEN PURP C601 2113743N50 100 PF 5%...
Page 131 Professional Radio GP Series Power Distribution and Controller Service Information Issue: November 2004...
Page 132 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 133 Table of Contents Chapter 1 THEORY OF OPERATION 1.0 Overview ......................1-1 2.0 Radio Power Distribution ..................1-1 3.0 Controller Circuits ....................1-2 3.1 Controller Architecture..................1-2 3.2 MCU Digital Architecture ................1-2 3.3 Real Time Clock .....................1-3 3.4 ModB/Vstby Supply ..................1-4 3.5 Audio/Signaling Architecture ................1-4 Chapter 2 TROUBLESHOOTING CHARTS 1.0 UHF/ UHF2 Controller..................2-1...
Page 135: Overview
Chapter 1 THEORY OF OPERATION Overview This Chapter provides a detailed theory of operation for the power distribution and controller circuits in the radio. The components for these circuits are contained on the Main Board. Refer to the RF sections of this manual for the component location details and the parts lists for these circuits. Radio Power Distribution Accessories 20 pin Connector...
Page 136: Controller Circuits
THEORY OF OPERATION Controller Circuits Controller Architecture The controller board is the central interface between the various subsystems of the radio. It is separated into MCU digital and audio/signalling architectures as shown in Figure 1-2. External Microphone To Synthesizer Internal Microphone 16.8 MHz Reference Clock...
Page 137: Real Time Clock
Controller Circuits Table 1-1 Radio Memory Requirements EXT RAM EEPROM RADIO ROM (KB) (KB) (KB) Conventional MDC GP140 128K Conventional 5 Tone GP320, GP340 512K Conventional 5 Tone GP360, GP380 512K Privacy Plus GP240, GP280 512K SmartZone GP540, GP580 512K GP640, GP680 512K GP1280...
Page 138: Modb/Vstby Supply
THEORY OF OPERATION A MOSFET Q416 switches in the LiO supply when Vdd is removed. Q416 also provides isolation from BOOT_CTRL function in the event of radio program flashing. The 3.3V regulator charges the Lithium battery. ModB/Vstby Supply The supply to the ModB/Vstby pin varies depending on the conditions listed in Table 1-2. Table 1-2 ModB/Vstby Supply Modes Condition Circuit Operation...
Page 139: All Models Except Those With Pcb 8486458Z03
Chapter 2 TROUBLESHOOTING CHARTS UHF/ UHF2/ 800MHz Controller All models except those with PCB 8486458Z03 MCU Check Press PTT. Red LED does not Before replacing light up Power Up Not able to pro- MCU, check SPI Alert Tone gram RF Board AUDIO Audio at clock, SPI data,...
Page 140: Models With Pcb 8486458Z03
TROUBLESHOOTING CHARTS Models with PCB 8486458Z03 MCU Check Press PTT. Red LED does not Before replacing light up Not able to pro- Power Up MCU, check SPI gram RF Board AUDIO Audio at Alert Tone clock, SPI data, J403 Audio AudioPA and RF IC select at Pin 2 &...
Page 141: Allocation Of Schematics And Circuit Boards
Chapter 3 CONTROLLER SCHEMATICS Allocation of Schematics and Circuit Boards The Controller circuits are contained on the printed circuit board (PCB) containing the RF circuits. This Chapter shows the schematics for the Controller circuits only, refer to the relevant RF section for details of the related RF circuits, the PCB component layouts and the Parts Lists.
Page 142 CONTROLLER SCHEMATICS Table 3-3 Schematics - Set 3 PCBs : 8486458Z03 8486686Z02 UHF2 SCHEMATICS Overall Controller Schematic Page 3-15 ASFIC ON_OFF Page 3-16 Microprocessor Page 3-17 Memory Page 3-18 Interface Page 3-18 Audio Power Amplifer Page 3-19...
Page 143: Controller - Set
Controller - Set 1 (PCB 8480450Z03, 8485641Z02, 8480587Z01, 8485677Z01, 8480641Z03) Controller - Set 1 (PCB 8480450Z03, 8485641Z02, 8480587Z01, 8485677Z01, 8480641Z03) TO/FROM RF IF_RED_LED_CTRL RED_LED RED_LED IF_GREEN_LED_CTRL GREEN_LED GREEN_LED IF_SB1_CTRL AUDIO IF_SB2_CTRL IF_SB3_CTRL INT_MIC 4V_3.3V 4V_3.3V IF_EMER_CTRL EMER EMER IF_RTA0_CTRL EXT_MIC RTA0 RTA0 Vddd...
Page 144 Controller - Set 1 (PCB 8480450Z03, 8485641Z02, 8480587Z01, 8485677Z01, 8480641Z03) 4V_3.3V R405 R402 SWB+ Vddd Q400 TP406 BATT_CODE Vddd UNSWB+ C401 C400 R401 0.1uF .01uF R427 R406 2.7K U400 C402 7.45V LP2951ACMM-3.3 0.1uF C403 CR412 10uF INPUT OUTPUT BATT_DATA_IN FEEDBACK ERROR INT_EXT_Vdd SHUTDOWN...
Page 145 Controller - Set 1 (PCB 8480450Z03, 8485641Z02, 8480587Z01, 8485677Z01, 8480641Z03) Vddd F1200 R457 R409 SCI_TX SCI_RX TP401 TP402 TEST_POINT TEST_POINT 3.28V 3.28V R418 1.90V UNSWB+ Vddd Vddd Vddd R437 C431 C449 C453 C423 100pF 100pF 100pF 100pF L411 390nH U410 L410 ILC7062CM-33 3.3V...
Page 146 Controller - Set 1 (PCB 8480450Z03, 8485641Z02, 8480587Z01, 8485677Z01, 8480641Z03) Vddd C466 100pF C458 100pF C425 C426 R481 0.1uF 100pF C459 100pF J400 U405 40-PINS CONNECTOR SRM2B256 EXT_MIC J400-40 EXT_MIC VS_CS J400-39 VS_CS SWB+ J400-38 SW_B+ E400 Vddd J400-37 Vddd VS_AUDSEL VS_AUDSEL J400-36...
Page 147 Controller - Set 1 (PCB 8480450Z03, 8485641Z02, 8480587Z01, 8485677Z01, 8480641Z03) SWB+ UNSWB+ OPT_SEL2 R450 OPT_SEL1 VR447 VR448 C474 VR449 C475 C484 10.0V 10.0V 10.0V 470pF C483 .01uF 10uF 470pF R473 C471 J403 C472 470pF 470pF C473 C442 20 PIN CONNECTOR 470pF U420 0.1uF...
Page 148 Controller - Set 1 (PCB 8480450Z03, 8485641Z02, 8480587Z01, 8485677Z01, 8480641Z03) Intentionally left blank...
Page 149 Controller - Set 2 (PCB 8480450Z13/14, 8485641Z06) Controller - Set 2 (PCB 8480450Z13/14, 8485641Z06) TO/FROM RF RED_LED IF_RED_LED_CTRL RED_LED GREEN_LED IF_GREEN_LED_CTRL GREEN_LED IF_SB1_CTRL AUDIO IF_SB2_CTRL IF_SB3_CTRL 4V_3.3V INT_MIC 4V_3.3V EMER IF_EMER_CTRL EMER EXT_MIC RTA0 IF_RTA0_CTRL Vddd RTA0 Vddd RTA1 IF_RTA1_CTRL RTA1 RTA2 DEMOD...
Page 150 3-10 Controller - Set 2 (PCB 8480450Z13/14, 8485641Z06) 4V_3.3V R405 R402 SWB+ TP410 Q400 Vddd BATT_CODE TP406 Vddd C405 100pF UNSWB+ C401 C400 R401 800 MHz only 0.1uF .01uF R406 R427 2.7K U400 C402 C403 LP2951ACMM-3.3 CR412 0.1uF 10uF Vdda INPUT OUTPUT R407...
Page 151 Controller - Set 2 (PCB 8480450Z13/14, 8485641Z06) 3-11 Vddd F1200 R457 R409 SCI_TX SCI_RX TP401 TP402 TEST_POINT TEST_POINT R418 UNSWB+ Vddd Vddd Vddd R437 C431 C449 C423 C453 100pF 100pF 100pF 100pF L411 U410 390nH ILC7062CM-33 L410 3.3V 390nH R411 C456 VIN VOUT 100pF C434...
Page 152 3-12 Controller - Set 2 (PCB 8480450Z13/14, 8485641Z06) Vddd C425 C426 0.1uF 100pF C466 100pF U405 C458 SRM2B256 100pF C404 800 MHz only 100pF C459 100pF R481 C526 C527 100pF 100pF J400 40 - PIND CONNECTOR EXT_MIC J400-40 EXT_MIC VS_CS J400-39 VS_CS SWB+...
Page 153 Controller - Set 2 (PCB 8480450Z13/14, 8485641Z06) 3-13 UNSWB+ OPT_SEL2 C475 SWB+ OPT_SEL1 VR446 VR447 VR445 10uF 10.0V 10.0V VR449 10.0V VR448 10.0V R473 10.0V R450 J403 C471 U420 C442 20 PIN CONNECTOR R499 C472 R423 TDA8547 100pF 0.1uF C473 J403-1 100pF 20 11...
Page 154 3-14 Controller - Set 2 (PCB 8480450Z13/14, 8485641Z06) Intentionally left blank...
Page 155 Controller - Set 3 (PCB 8486458Z03, 8486686Z02) 3-15 Controller - Set 3 (PCB 8486458Z03, 8486686Z02) TO/FROM RF RED_LED IF_RED_LED_CTRL RED_LED GREEN_LED IF_GREEN_LED_CTRL GREEN_LED IF_SB1_CTRL AUDIO IF_SB2_CTRL IF_SB3_CTRL 4V_3.3V INT_MIC 4V_3.3V EMER IF_EMER_CTRL EMER Vddd EXT_MIC RTA0 IF_RTA0_CTRL Vddd RTA0 RTA1 IF_RTA1_CTRL RTA1 RTA2...
Page 156 3-16 Controller - Set 3 (PCB 8486458Z03, 8486686Z02) 4V_3.3V R405 R402 SWB+ Q400 Vddd TP406 UNSWB+ C401 C400 R401 0.1uF .01uF R406 TP410 C403 U400 10uF LP2951ACMM-3.3 BATT_CODE C402 R407 OUTPUT INPUT Vddd INT_EXT_Vdd 0.1uF ERROR FEEDBACK 800 MHz only C405 SENSE SHUTDOWN...
Page 157 Controller - Set 3 (PCB 8486458Z03, 8486686Z02) 3-17 Vddd F1200 R409 R457 SCI_TX SCI_RX TP401 TP402 TEST_POINT TEST_POINT R418 UNSWB+ Vddd Vddd Vddd R437 C431 C449 C453 C423 100pF 100pF 100pF 100pF L411 U410 390nH ILC7062CM-33 L410 3.3V 390nH R411 C456 VIN VOUT 100pF C434...
Page 158 3-18 Controller - Set 3 (PCB 8486458Z03, 8486686Z02) Vddd C425 C426 0.1uF 100pF C466 100pF U405 C458 SRM2B256 100pF C404 800 MHz only 100pF C459 100pF R481 C526 C527 100pF 100pF J400 40 - PIND CONNECTOR EXT_MIC J400-40 EXT_MIC VS_CS J400-39 VS_CS SWB+...
Page 159 Controller - Set 3 (PCB 8486458Z03, 8486686Z02) 3-19 UNSWB+ OPT_SEL2 C475 SWB+ OPT_SEL1 VR446 VR447 VR445 10uF 10.0V 10.0V VR449 10.0V VR448 10.0V R473 10.0V R450 J403 C471 U420 C442 20 PIN CONNECTOR R499 C472 R423 TDA8547 100pF 0.1uF C473 J403-1 100pF 20 11...
Page 160 3-20 Controller - Set 3 (PCB 8486458Z03, 8486686Z02) Intentionally left blank...
Page 161 Professional Radio GP Series UHF (403 - 470MHz) Service Information Issue: November 2004...
Page 162 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 163 Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 GP320/GP340/GP360/GP380 Model Chart............1-1 2.0 GP140 Model Chart .....................1-2 3.0 GP640/GP680 Model Chart .................1-2 4.0 GP1280 Model Chart ...................1-3 5.0 GP240/GP280/GP540/GP580 Model Chart............1-4 6.0 Technical Specifications ..................1-5 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 UHF Transmitter ....................2-1 2.1 Power Amplifier ....................2-1...
Page 164 Chapter 4 UHF PCB/SCHEMATICS/PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards ............4-1 1.1 Controller Circuits ................... 4-1 1.2 Voice Storage Facility..................4-1 2.0 UHF PCB 8480450Z03 Schematics ..............4-5 3.0 UHF PCB 8480450Z03/8480587Z01 Parts List..........4-13 4.0 UHF PCB 8480587Z01 (GP1280) Schematics..........4-17 5.0 UHF PCB 8480587Z01 (GP1280) Voice Storage Parts List ......
Page 165: Chapter 1 Model Chart And Technical Specifications
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS GP320/GP340/GP360/GP380 Model Chart Professional GP300 Series (UHF) Model Description MDH25RDC9AN0_E GP320 UHF 403-470MHz 4W 1-Ch MDH25RDC9AN3_E GP340 UHF 403-470MHz 4W 16-Ch MDH25RDF9AN5_E GP360 UHF 403-470MHz 4W 255-Ch MDH25RDH9AN6_E GP380 UHF 403-470MHz 4W 255-Ch Item Description PMLE4140_...
Page 166: Gp140 Model Chart
MODEL CHART AND TECHNICAL SPECIFICATIONS GP140 Model Chart Professional GP140 (UHF) Model Description MDH25RDC9AA3_E GP140 UHF 403-470 MHz 4W 16 Ch Item Description PMLE4130_ *GP140 UHF Back Cover Kit 6864110B25 GP140 Basic User Guide NAE6483_ UHF Whip (403-470 MHz) Antenna HNN9008_ Battery, NiMH Standard x = Indicates one of each is required.
Page 167: Gp1280 Model Chart
GP1280 Model Chart GP1280 Model Chart Professional GP1280 (UHF) Model Description MDH25RDN9CK8_E GP1280 UHF 403-470 MHz 4W Item Description PMLE4142_ *GP1280 UHF Back Cover Kit 6864110B20 GP1280 Basic User Guide NAE6483_ UHF Whip (403-470 MHz) Antenna HNN9008_ Battery, NiMH Standard x = Indicates one of each is required.
Page 168 MODEL CHART AND TECHNICAL SPECIFICATIONS GP240/GP540/GP280/GP580 Model Chart Professional GP200/GP500 Series (UHF) Model Description MDH25RDC9GC3 GP540 UHF 403-470 MHz 4W MDH25RDH9GC6 GP580 UHF 403-470 MHz 4W MDH25RDC9GB3 GP240 UHF 403-470 MHz 4W MDH25RDH9GB6 GP280 UHF 403-470 MHz 4W Item Description *PMLE4192_ GP240/GP540 UHF Back Cover Kit *PMLE4193_...
Page 169: Technical Specifications
Technical Specifications Technical Specifications Data is specified for +25°C unless otherwise stated. General Specifications Channel Capacity GP140 GP240, GP280 128 in conventional Mode GP320 GP340 GP360, GP380 GP540, GP580 128 in conventional Mode GP640, GP680, GP1280 16 (Conventional) Power Supply Rechargeable battery 7.5v Dimensions: H x W x D (mm) Height excluding knobs GP140/GP240/320/340/360/380/...
Page 170 MODEL CHART AND TECHNICAL SPECIFICATIONS Transmitter *Frequencies - Full Bandsplit UHF 403-470 MHz Channel Spacing 12.5/20/25 kHz Frequency Stability ±1.5 ppm (-25°C to +55°C, +25° Ref.) Power 403 - 470 MHz:1-4W ±2.5 @ 12.5 kHz Modulation Limiting ±4.0 @ 20 kHz ±5.0 @ 25 kHz FM Hum &...
Page 171: Chapter 2 Theory Of Operation
Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the UHF circuits in the radio. For details of the theory of operation and trouble shooting for the the associated Controller circuits refer to the Controller Section of this manual.
Page 172: Antenna Switch
THEORY OF OPERATION The LDMOS PA is capable of supplying an output power of 7W with an input signal of 0.3W. The current drain is typically 1300mA while operating in the frequency range of 403-470MHz. The power output can be varied by changing the bias voltage. Antenna Switch The antenna switch circuit consists of two pin diodes (CR101 and CR102), a pi network (C107, L104 and C106), and two current limiting resistors (R101 and R170).
Page 173: Uhf Receiver (All Models Except Those With Pcb 8486458Z03)
UHF Receiver (all models except those with PCB 8486458Z03) UHF Receiver (all models except those with PCB 8486458Z03) The UHF receiver consists of a front end, back end, and automatic gain control circuits. A block diagram of the receiver is shown in Figure 2-2. Detailed descriptions of these features are contained in the paragraphs that follow.
Page 174: Receiver Back End
THEORY OF OPERATION The output of the bandpass filter is coupled to the RF amplifier transistor Q301 via C307. After being amplified by the RF amplifier, the RF signal is further filtered by a second varactor tuned bandpass filter, consisting of L306, L307, C313, C317, CR304 and CR305. Both the pre and post-RF amplifier varactor tuned filters have similar responses.
Page 175: Automatic Gain Control (Agc)
UHF Receiver (all models except those with PCB 8486458Z03) Automatic Gain Control (AGC) ( Refer to the UHF Receiver Front End and Receiver Back End schematic diagrams ) The front end automatic gain control circuit provides automatic reduction of gain, of the front end RF amplifier via feedback.
Page 176: Uhf Receiver (Models With Pcb 8486458Z03)
THEORY OF OPERATION UHF Receiver (Models with PCB 8486458Z03) The UHF receiver consists of a front end, back end, and automatic gain control circuits. A block diagram of the receiver is shown in Figure 2-3. Detailed descriptions of these features are contained in the paragraphs that follow.
Page 177: Receiver Back End
UHF Receiver (Models with PCB 8486458Z03) The output of the bandpass filter is coupled to the RF amplifier transistor Q301 via C307. After being amplified by the RF amplifier, the RF signal is further filtered by a second varactor tuned bandpass filter, consisting of L306, L307, C313, C317, CR304 and CR305.
Page 178: Frequency Generation Circuit
THEORY OF OPERATION Frequency Generation Circuit ( Refer to Figure 2-4 and the UHF Frequency Synthesizer schematic diagram ) The frequency generation circuit, shown in Figure 2-4, is composed of Fractional-N synthesizer U201 and VCO/Buffer IC U241. Designed in conjunction to maximize compatibility, the two ICs provide many of the functions that normally require additional circuitry.
Page 179: Synthesizer
Frequency Generation Circuit Synthesizer ( Refer to Figure 2-5 and the UHF Synthesizer schematic diagram) The Fractional-N synthesizer, shown in Figure 2-5, uses a 16.8MHz crystal (FL201) to provide a reference for the system. The LVFractN IC (U201) further divides this to 2.1MHz, 2.225MHz, and 2.4MHz to be used as reference frequencies.
Page 180: Voltage Controlled Oscillator
2-10 THEORY OF OPERATION Voltage Controlled Oscillator (VCO) ( Refer to Figure 2-6 and the UHF Voltage Controlled Oscillator schematic diagram) The VCOB IC (U241), shown in Figure 2-6, in conjunction with the Fractional-N synthesizer (U201) generates RF in both the receive and the transmit modes of operation. The TRB line (U241 pin 19) determines which oscillator and buffer are enabled.
Page 181 Frequency Generation Circuit 2-11 Table 2-1 Level Shifter Logic Desired AUX 4 AUX 3 Mode High (@3.2V) High (@4.8V) High Battery Saver Hi-Z/Float (@2.5V) In the receive mode, U241 pin 19 is low or grounded. This activates the receive VCO by enabling the receive oscillator and the receive buffer of U241.
Page 182: Voice Storage (Gp1280 Only)
2-12 THEORY OF OPERATION Voice Storage (GP1280 Only) ( Refer to Figure 2-7 and the UHF Voice Storage schematic diagram) The Voice Storage feature is offered as standard in the GP1280 and as an Option board for GP340/GP360/GP380 and GP640/GP680 models. The Voice Storage feature enables users to: ■...
Page 183 Voice Storage (GP1280 Only) 2-13 Audio routing to the Voice Storage circuitry during receive message recording, message playback, personal memo recording and voice prompt transmit over the air are as follows: Received Message Recording The receive audio is tapped from the Rx_Aud_Rtn pin of the ASFIC_CMP during receive mode. Message Playback Message playback is via the FLAT_RX_SND pin of ASFIC_CMP.
Page 184 2-14 THEORY OF OPERATION...
Page 185: Chapter 3 Troubleshooting Charts
Chapter 3 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (All models except those with PCB 8486458Z03) (Sheet 1 of 2) START Bad SINAD Bad 20dB Quieting No Recovered Audio udio Check Controller at pin 27 of U301? Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Check Q320 bias...
Page 186 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (All models except those with PCB 8486458Z03) (Sheet 2 of 2) Inject RF into J101 Q302 Trace IF signal collector OK? IF Signal from L311 to IF signal at L311? Q302. Check for present? bad XTAL filter.
Page 187 Troubleshooting Flow Chart for Receiver (Models with PCB 8486458Z03) (Sheet 1 of 2) Troubleshooting Flow Chart for Receiver (Models with PCB 8486458Z03) (Sheet 1 of 2) START Bad SINAD Bad 20dB Quieting No Recovered Audio Check Controller Audio at pin 8 of U301? Spray or inject 1st IF 44.85 MHz into...
Page 188: 8486458Z03)(Sheet 2 Of 2)
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Models with PCB 8486458Z03) (Sheet 2 of 2) Inject RF into J101 Trace IF signal Q302 collec- from L311 to IF Signal at tor OK? Q302. Check for L311? IF signal bad XTAL filter. present? Before replacing U301, check...
Page 189: Troubleshooting Flow Chart For Transmitter
Troubleshooting Flow Chart for Transmitter Troubleshooting Flow Chart for Transmitter START No Power Is There B+ Bias for Check Q111 Ant switch CR101 Is Control Voltage Is Current Check PCIC High or Low at C119 High 1. Check Pin Diodes Check Drive to 2.
Page 190: Troubleshooting Flow Chart For Synthesizer
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Synthesizer 3.3V at Check U248, Start U201 pins 5, L201 & L202 20, 34& Check CR201, Visual U210, U211, Correct check of the C258, C259 & Problem Board OK? C228 Is U201 16.8MHz 16.8MHz at pin 6 of Pin47 AT = Replace...
Page 191: Troubleshooting Flow Chart For Vco
Troubleshooting Flow Chart for VCO Troubleshooting Flow Chart for VCO START No LO? U241 Check R245 TRB = Pin 10 for dry joint 5V? @U241 Carrier? >1V? or faulty Pin 19 VCO OK L253 Change Open L253 Circuit? AUX 3 Check High? R260...
Page 192: Troubleshooting Flow Chart For Receive Message/Personal Memo Recording
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receive Message/Personal Memo Recording Cannot Receive Message Personal Memo Recording Check menu Turn on Check Mic I/P at whether record “Record Incoming J403-18 any audio? incoming messages Call” turned on Check Spkr/Mic Flex Connection J403 Check J400-34 Any audio?
Page 193: Troubleshooting Flow Chart For Message Playback
Troubleshooting Flow Chart for Message Playback Troubleshooting Flow Chart for Message Playback Cannot Playback Message Check keypad/ Assemble controller flex properly interconnect ok? Change U700 or Voice Storage Audio at J400-35? Option Board Change U404...
Page 194 3-10 TROUBLESHOOTING CHARTS...
Page 195: Main Board Top Side
Chapter. The Voice Storage facility may be fitted to other radios in the GP Series as an option board; reference must be made to the Option Board manual in this case. The Voice Storage schematic and the related PCBs are shown in Tables 4-2, 4-3 and 4-4 below.
Page 196: Parts List
UHF PCB/SCHEMATICS/PARTS LISTS Table 4-2 UHF GP1280 Diagrams and Parts Lists PCB : 8480587Z01 Main Board Top Side Page 4-17 Main Board Bottom Side Page 4-18 SCHEMATICS Controls and Switches Page 4-7 Receiver Front End Page 4-8 Receiver Back End Page 4-9 Synthesizer Page 4-10...
Page 197: Main Board Top Side
Allocation of Schematics and Circuit Boards Table 4-4 UHF GP1280 Diagrams and Parts Lists PCB : 8480587Z05 Main Board Top Side Page 4-33 Main Board Bottom Side Page 4-34 SCHEMATICS Controls and Switches Page 4-23 Receiver Front End Page 4-24 Receiver Back End Page 4-25 Synthesizer...
Page 198 UHF PCB/SCHEMATICS/PARTS LISTS...
Page 199: Uhf Pcb 8480450Z03 Schematics
UHF PCB 8480450Z03 Schematics UHF PCB 8480450Z03 Schematics SH400 R410 E407 E409 R437 PB503 PB502 PB504 PB501 VR440 C521 SH323 R300 R352 C397 FL201 RT301 R314 SH321 R321 CR310 FL301 VR501 C362 C328 R335 C363 C325 U405 TP201 L332 R338 L325 J400 R506...
Page 200 UHF PCB 8480450Z03 Schematics C522 VR442 C523 E405 SH402 C437 L505 SH322 E404 L330 C359 E406 C338 S502 C358 C357 E402 C390 R350 C344 R344 C383 C360 C346 R311 R415 C361 R312 C433 C343 C431 C208 C263 SH202 L261 C264 C204 C466 L314...
Page 201 UHF PCB 8480450Z03 Schematics B501 L505 BATTERY_CONTACT 390nH RADIO_CODE 2 DATA UNSWB+ BATT_CODE 1 NEG BATT + 3 POS F501 S502 CONN_J SWITCH BATT – MECH_SWB+ LI_ION B503 B504 C502 VR506 CR501 VR439 C503 0.47uF 6.8V 100pF Vdda R507 Vdda C505 6.8V VR501...
Page 202 UHF PCB 8480450Z03 Schematics DACRx C322 82pF R342 [email protected] 100K L310 150nH R310 C315 R308 R305 C314 100pF 0.1uF R304 R309 C380 .01uF [email protected] C321 CR306 L304 [email protected] 100pF 180nH C306 T301 XFMR C309 [email protected] C308 [email protected] 100pF R306 R307 100pF C312 100K...
Page 203 UHF PCB 8480450Z03 Schematics L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C348 C347 C345 C344 C346 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R345 R355 2.628V 3.185V Q320 C342 C357 C384 C383 BFQ67W 56pF...
Page 204 UHF PCB 8480450Z03 Schematics 4-10 U210 C296 U211 C265 TC7ST04FU 0.1uF TC7ST04FU C257 100pF C258 7.697V .01uF U247 ADP3300 SWB+ C259 .01uF (SOURCE) CR201 C291 10uF C294 C293 4V_3.3V L202 100pF 0.47uF U248 2.2uH L203 LP2980 C277 C278 2.2uH C230 C229 100pF 2.2uF...
Page 205 UHF PCB 8480450Z03 Schematics 4-11 C281 R245 100pF R242 C250 7.5pF C276 C285 C286 4.567V (Rx) L243 2.2uF 100pF 0.1uF 4.613V (Tx) RESONATOR C246 L281 L273 R241 100pF 390nH 33nH C242 7.5pF C272 C273 0.1uF C243 L271 L242 R244 7.5pF 68nH 220nH C245...
Page 206 UHF PCB 8480450Z03 Schematics 4-12 R170 E101 BEAD R102 0.075 R101 UNSWB+ L107 C114 C123 33.47nH 100pF 10uF C172 C108 100pF UNSWB+ L105 100pF 390nH R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 L108 L109 C121 C160 L112 11.03nH 100pF 4.22nH 100pF 22nH...
Page 207: Uhf Pcb 8480450Z03/8480587Z01 Parts List
UHF PCB 8480450Z03 / PCB 8480587Z01 Parts List 4-13 UHF PCB 8480450Z03 / Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description PCB 8480587Z01 Parts List Part No. Part No. Part No. Circuit Motorola C138 2113743N50 100pF C235 2104993J02 2.2uF...
Page 208 UHF PCB 8480450Z03 / PCB 8480587Z01 Parts List 4-14 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C343 2113743A23 0.22uF C400 2113743L41 .01uF, 10% C448 2113928N01 0.1uF, 10%...
Page 209 UHF PCB 8480450Z03 / PCB 8480587Z01 Parts List 4-15 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. L116 2460591A50 9.75nH PB503 4080523Z01 Tactile, Pushbutton R170 0662057A34 R317 0662057M74...
Page 210 UHF PCB 8480450Z03 / PCB 8480587Z01 Parts List 4-16 * Motorola Depot Servicing only Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Reference designators with an asterisk indicate Part No. Part No. Part No. components which are not fieldreplaceable...
Page 211: Uhf Pcb 8480587Z01 (Gp1280) Schematics
UHF PCB 8480587Z01 (GP1280) Schematics 4-17 UHF PCB 8480587Z01 (GP1280) Schematics R410 E407 E409 PB504 PB503 PB502 PB501 R437 VR440 C521 SH323 R300 R352 C397 FL201 RT301 R314 R321 FL301 VR501 C328 C362 C363 C710 C325 R335 U405 L332 U406 R338 J400 R506...
Page 212 UHF PCB 8480587Z01 (GP1280) Schematics 4-18 SH402 C522 VR442 C523 E405 C437 L505 E404 C359 L330 E406 R703 C709 C708 C338 S502 C358 B501 C357 E402 R350 C390 R344 C344 C383 C360 C719 R415 U301 C346 R311 U710 C361 C433 U409 R708 R312...
Page 213 UHF PCB 8480587Z01 (GP1280) Schematics 4-19 Vddd CR700 3.29V C703 100pF C701 C702 0.1uF IF_CLK_1_VOICE XCLK SCLK C704 0.1uF ANA_NEG AUDOUT ANA_POS IF_VS_CS_1_VOICE Vddd VS_CS IF_DATA_1_VOICE MOSI DATA MISO U700 C707 C706 ISD33000 0.1uF IF_MISO_1_VOICE MISO IF_VS_INT_1_VOICE AMCAP R708 VS_INT 560K IF_VS_RAC_1_VOICE IF_RX_AUD_RTN_1_VOICE...
Page 214 Voice Storage Parts List (GP1280) 4-20 Voice Storage Parts List (GP1280) * Motorola Depot Servicing only Circuit Motorola Reference designators with an asterisk indicate Description Part No. components which are not fieldreplaceable because they need to be calibrated with C601...
Page 215: Uhf Pcb 8480587Z03 (Gp1280) Schematics
UHF PCB 8480587Z03 Schematics 4-21 UHF PCB 8480587Z03 Schematics R410 E407 E409 PB504 PB503 PB502 PB501 R437 VR440 SH323 C521 R300 R352 C397 FL201 RT301 R314 R321 C328 C363 VR501 C325 R335 C362 U405 R338 L325 J400 R506 R325 TP201 C385 C351 C353...
Page 216 UHF PCB 8480587Z03 Schematics 4-22 M301 M101 M400 C522 VR442 C523 E405 C437 L505 SH701 E404 L330 C359 E406 R703 C709 C708 C338 S502 R415 C358 C357 R350 C344 C390 E402 R344 C383 C360 C438 C719 R311 C346 C361 C439 R708 C343 R312...
Page 217 UHF PCB 8480587Z03 Schematics 4-23 RADIO_CODE B501 L505 BATTERY_CONTACT UNSWB+ 390nH DATA BATT_CODE BATT+ F501 S502 MECH_SWB+ SWITCH BATT- LI_ION B503 TAB2 B504 C502 VR506 CR501 VR439 C503 0.47uF TAB1 6.8V 100pF R507 C505 6.8V 100pF VR501 Vdda PB501 SWITCH VR440 C521 6.8V...
Page 218 UHF PCB 8480587Z03 Schematics 4-24 DACRx C322 82pF R342 100K [email protected] L310 150nH R310 C315 R308 R305 C314 100pF 0.1uF R304 R309 C380 .01uF L304 C321 [email protected] CR306 100pF 180nH [email protected] C306 T301 XFMR [email protected] C309 C308 R306 R307 100pF [email protected] 100pF 100K C316...
Page 219 UHF PCB 8480587Z03 Schematics 4-25 L331 R343 2.20uH Vdd_FILTERED Vdda C382 (SOURCE) 10uF DEMOD R350 C344 C347 C348 C346 C345 100K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF C390 100pF C329 0.1uF C343 0.22uF R344 R345 R355 C383 100pF 2.628V 3.185V C342 C357 C384 0.22uF...
Page 220 UHF PCB 8480587Z03 Schematics 4-26 U211 U210 TC7ST04FU TC7ST04FU C296 C265 0.1uF C257 100pF VCC 5 C258 7.697V .01uF U247 ADP3300 SWB+ C259 .01uF (SOURCE) CR201 C291 C294 100pF 10uF C293 4V_3.3V L202 0.47uF U248 2.2uH LP2980 L203 C277 C278 2.2uH C229 100pF...
Page 221 UHF PCB 8480587Z03 Schematics 4-27 C281 R245 100pF R242 C250 L243 C286 C285 C276 7.5pF 4.567V (Rx) 2.2uF 0.1uF 100pF RESONATOR 4.613V (Tx) C246 L281 L273 R241 100pF 390nH 33nH C242 7.5pF C272 C273 0.1uF C243 L271 R244 L242 7.5pF 68nH 220nH RX_INJ...
Page 222 UHF PCB 8480587Z03 Schematics 4-28 E101 BEAD R102 0.075 UNSWB+ L107 C114 C123 33.47nH 100pF 10uF C172 UNSWB+ 100pF R106 C109 L106 100pF 7.66nH Microstrip Microstrip R172 TX_OUT C121 C160 L108 L109 L112 100pF 100pF 4.22nH 11.03nH 390nH Q110 Microstrip C118 100pF C130...
Page 223 UHF PCB 8480587Z03 Schematics 4-29 ANT_BIAS C108 SH100 100pF SHIELD L105 390nH TX_OUT HF SHIELD CR101 L101 L102 L104 19.61nH 19.61nH 19.61nH RX_IN CR102 C102 C101 C103 C104 C106 C107 6.2pF 6.2pF 4.7pF 3.3pF 100pF 10pF R170 C175 RF_JACK 20pF R101 ZMY0130486-O ZMY0130486-O...
Page 224: Uhf Pcb 8480587Z03 (Gp1280) Parts List
UHF PCB 8480587Z03 Parts List 4-30 UHF PCB 8480587Z03 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C174 2113743N50 100pF C278 2311049A09 2.2uF C343 2113743A23 0.220uF Part No.
Page 225 UHF PCB 8480587Z03 Parts List 4-31 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C424 2311049A59 10uF C511 2113743N50 100pF E400- L330 2462587N64 680nH C425 2113743M24 0.1uF C512...
Page 226 SH323 2680553Z01 SHIELD, CRYSTAL FILTER R322 0662057N30 200K R448 0662057N33 270K SH400 2680505Z01 CNTRL MEMORY SHIELD * Motorola Depot Servicing only R324 0662057M81 R449 0662057N08 SH401 2680506Z01 ON/OFF CNTRL SHIELD Reference designators with an asterisk indicate R325 0662057M94 6.8K R450...
Page 227: Uhf Pcb 8480587Z05 (Gp1280) Schematics
UHF PCB 8480587Z05 Schematics 4-33 UHF PCB 8480587Z05 Schematics R410 E407 E409 PB504 PB503 PB502 PB501 R437 VR440 SH323 R300 C521 R352 C397 R334 RT301 R321 R314 VR501 C363 C362 R335 U405 C328 C325 L325 TP201 J400 R338 R506 C385 R325 C353 SH201...
Page 228 UHF PCB 8480587Z05 Schematics 4-34 M401 M300 M100 R132 R131 SH403 R471 C415 CR105 Q410 R130 C440 C373 R109 C430 R349 C476 C133 C414 R436 C172 Q310 R172 Q111 C451 C450 R330 R331 C410 L281 J101 CR241 C409 R704 C371 C372 R716 R717 C408 CR243...
Page 229: Uhf Pcb 8480587Z05 (Gp1280) Parts List
UHF PCB 8480587Z05 Parts List 4-35 UHF PCB 8480587Z05 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Circuit Motorola Description Ref. Part No. C141 NOTPLACED C238 2113741F17 470pF...
Page 230 UHF PCB 8480587Z05 Parts List 4-36 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C344 2113743M24 100000pF C4001 NOTPLACED C431 2113743N50 100pF C494 2113743N50...
Page 231 UHF PCB 8480587Z05 Parts List 4-37 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. CR241 4805649Q13 Varactor J403 0905505Y02 20-Pin Connector L325 2480646Z20 2.20uH...
Page 232 UHF PCB 8480587Z05 Parts List 4-38 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R254 0662057M95 7.5K R338 NOTPLACED R431 0662057N39 470K R701 0662057N05...
Page 233 Zener Diode 10V VR447 4802245J74 Zener Diode 10V VR448 4802245J74 Zener Diode 10V VR449 4802245J74 Zener Diode 10V VR450 4802245J75 Zener Diode 12V VR460 4802245J73 Zener Diode 6.8V VR501 4813830A18 DIODE 6.8V VR506 4802245J73 Zener Diode 6.8V * Motorola Depot Servicing only...
Page 234 UHF PCB 8480587Z05 Parts List 4-40...
Page 235: 10.0 Uhf Pcb 8480450Z13/14 Schematics
UHF PCB 8480450Z13/14 Schematics 4-41 10.0 UHF PCB 8480450Z13/14 Schematics R410 E407 PB504 E409 PB501 PB503 PB502 R437 C505 VR440 C521 SH323 R300 R352 C502 VR444 C397 FL201 B503 B504 R351 R334 RT301 R316 R507 R314 R321 FL301 VR501 C362 C328 R335 C363...
Page 236 UHF PCB 8480450Z13/14 Schematics 4-42 M301 M101 M400 C522 VR442 C523 C436 VR506 E405 C437 R426 R420 L505 C345 C334 E404 R343 VR441 C359 L330 E406 S502 C382 C338 E403 C330 R414 C358 L331 C357 E401 E402 C326 R313 C390 R350 C344 C278...
Page 237 UHF PCB 8480450Z13/14 Schematics 4-43 RADIO_CODE BATTERY_CONTACT L505 B501 UNSWB+ 390nH BATT_CODE DATA 1 NEG BATT+ S502 3 POS F501 SWITCH BATT- CONN_J MECH_SWB+ LI_ION B503 TAB2 CR501 VR506 B504 VR439 C502 C503 6.8V TAB1 0.47uF 100pF R507 6.8V C505 VR501 100pF Vdda...
Page 238 UHF PCB 8480450Z13/14 Schematics 4-44 DACRx C322 82pF R342 100K L310 150nH R308 R310 C314 C315 R305 100pF 0.1uF R304 C380 R309 .01uF CR306 L304 C321 T301 180nH 100pF C306 XFMR C309 R306 C308 100pF R307 100K 100pF C312 100K C318 C310 L305...
Page 239 UHF PCB 8480450Z13/14 Schematics 4-45 R343 L331 2.20uH Vdd_FILTERED Vdda C382 10uF (SOURCE) DEMOD C348 C347 R350 C344 C346 C345 0.1uF 0.1uF 100K 0.1uF 0.1uF 0.1uF C390 C329 100pF 0.1uF C343 0.22uF R344 R355 R345 C383 Q320 C357 100pF C342 C384 BFQ67W 0.22uF...
Page 240 UHF PCB 8480450Z13/14 Schematics 4-46 U210 U211 TC7ST04FU C296 C257 TC7ST04FU C265 0.1uF 100pF 3 GND C258 .01uF U247 ADP3300 C259 SWB+ .01uF (SOURCE) CR201 C291 3 K3 10uF C294 C293 L202 U248 4V_3.3V 2 K2 A2 5 100pF 0.47uF 2.2uH LP2980 L203...
Page 241 UHF PCB 8480450Z13/14 Schematics 4-47 C281 R245 100pF R242 L243 C250 C276 C286 C285 RESONATOR 7.5pF 2.2uF 0.1uF 100pF C246 L281 R241 L273 100pF 390nH 33nH C242 7.5pF C272 C273 0.1uF C243 L242 L271 R244 7.5pF 220nH 68nH RX_INJ C245 2.4pF TX_INJ TX_IADJ...
Page 242 UHF PCB 8480450Z13/14 Schematics 4-48 E101 R102 BEAD 0.075 UNSWB+ L107 C114 C123 33.47nH 100pF 10uF C172 0.1uF C109 L106 UNSWB+ 100pF 7.66nH Microstrip Microstrip X_OUT R106 R172 Q110 C121 C160 R175 L109 L112 L108 100pF 100pF 22nH Microstrip 4.22nH C111 C112 C113...
Page 243 UHF PCB 8480450Z13/14 Schematics 4-49 ANT_BIAS SH100 C108 100pF L105 SHIELD 390nH TX_OUT HF SHIELD CR101 L102 L101 L104 19.61nH 19.61nH 19.61nH RX_IN CR102 C101 C106 C102 C103 C104 C107 100pF 6.2pF 10pF 6.2pF 4.7pF 3.3pF R170 C175 20pF RF_JACK R101 ZMY0130486-A ZMY0130486-A...
Page 244: Uhf Pcb 8480450Z13/14 Parts List
UHF PCB 8480450Z13/14 Parts List 4-50 11.0 UHF PCB 8480450Z13/14 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Parts List C171 2113743N50 100pF C272 NOT PLACED C339 - Circuit Motorola Part Description C172 2113740F51 100pF C273...
Page 245 UHF PCB 8480450Z13/14 Parts List 4-51 Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Circuit Motorola Part Description Description Description Description C416 2113928N01 0.1uF C503 2113743N50 100pF L108 2479990A01 4.22nH Q302 4802245J44 NPN Transistor C419 NOT PLACED C505 2113743N50...
Page 246 UHF B1 main PC board R317 0662057M74 1000 R428 0662057M10 SH302 2680555Z01 Receiver front end bot shield R318 0662057A79 * Motorola Depot Servicing only R319 0662057A29 R429 0662057M98 SH303 2680509Z01 Mixer shield Reference designators with an asterisk indicate R431 0662057N39...
Page 247: 12.0 Uhf Pcb 8486458Z03 Schematics
UHF PCB 8486458Z03 Schematics 4-53 12.0 UHF PCB 8486458Z03 Schematics R410 C521 E407 E409 R437 SH323 C338 FL302 C325 C349 VR501 U405 TP201 J400 R506 SH201 U247 C324 Q505 C220 L311 R505 R355 L203 R324 C352 C426 C425 C512 C513 C260 Q502 Q210...
Page 248 UHF PCB 8486458Z03 Schematics 4-54 R132 R131 SH403 C415 R130 Q410 CR105 R109 C430 C440 C373 C414 C133 C476 R349 R436 C172 Q111 Q310 R172 C451 C450 C410 R330 R331 L281 CR241 J101 C409 C371 C372 C138 C151 C445 R242 CR243 U420 C152...
Page 249 UHF PCB 8486458Z03 Schematics 4-55 RADIO_CODE BATTERY_CONTACT L505 B501 UNSWB+ 390nH BATT_CODE DATA 1 NEG BATT+ S502 3 POS F501 SWITCH BATT- CONN_J MECH_SWB+ LI_ION B503 TAB2 CR501 B504 VR506 VR439 C503 C502 6.8V TAB1 100pF 0.47uF R507 6.8V C505 VR501 100pF Vdda...
Page 250 UHF PCB 8486458Z03 Schematics 4-56 DACRx C322 82pF R342 100K L310 150nH C315 R308 C314 R310 R305 100pF 0.1uF R304 R309 C380 .01uF CR306 L304 C321 T301 180nH 100pF C306 XFMR C309 C308 R306 100pF R307 100pF 100K 100K C310 C312 C316 C318...
Page 251 UHF PCB 8486458Z03 Schematics 4-57 U302-1 R345 R360 TC7W04F FL303 C352 CFWC455E 0.1uF 1 IN U302-3 TC7W04F U302-4 PWR_GND R355 100K BW_SEL U302-2 CR312 R321 TC7W04F R324 FL304 C362 CFWC455G 0.1uF OUT 2 R361 CR313 R350 R358 3.3K 2.4K C329 C357 0.1uF 0.1uF...
Page 252 UHF PCB 8486458Z03 Schematics 4-58 U210 U211 TC7ST04FU C296 C257 TC7ST04FU C265 0.1uF 100pF 3 GND C258 .01uF U247 ADP3300 C259 SWB+ .01uF (SOURCE) CR201 C291 10uF C294 C293 3 K3 U248 4V_3.3V L202 100pF 0.47uF 2 K2 A2 5 LP2980 2.2uH L203...
Page 253 UHF PCB 8486458Z03 Schematics 4-59 C281 R245 100pF R242 L243 C250 C286 RESONATOR C276 C285 7.5pF 2.2uF 0.1uF 100pF C246 L281 R241 L273 100pF 390nH 33nH C242 7.5pF C272 C273 0.1uF C243 L242 L271 R244 7.5pF 220nH 68nH RX_INJ C245 2.4pF TX_INJ TX_IADJ...
Page 254 UHF PCB 8486458Z03 Schematics 4-60 E101 R102 BEAD 0.075 UNSWB+ L107 C114 C123 33.47nH 100pF 10uF C172 0.1uF C109 L106 UNSWB+ 100pF 7.66nH Microstrip Microstrip X_OUT R106 R172 Q110 C121 C160 R175 L109 L112 L108 100pF 100pF 22nH Microstrip 4.22nH C111 C112 C113...
Page 255 UHF PCB 8486458Z03 Schematics 4-61 ANT_BIAS SH100 C108 100pF L105 SHIELD 390nH TX_OUT HF SHIELD CR101 L102 L101 L104 19.61nH 19.61nH 19.61nH RX_IN CR102 C101 C106 C102 C103 C104 C107 100pF 6.2pF 10pF 6.2pF 4.7pF 3.3pF R170 C175 20pF RF_JACK R101 ZMY0130486-A ZMY0130486-A...
Page 256: 13.0 Uhf Pcb 8486458Z03 Parts List
UHF PCB 8486458Z03 Parts List 4-62 13.0 UHF PCB 8486458Z03 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C170 2113743N50 100pF C263 2113743N02 0.75pF C337 NOT PLACED Part No.
Page 257 UHF PCB 8486458Z03 Parts List 4-63 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C419 NOT PLACED C491 2113743N50 100pF E101 2484657R01 Ferrite Bead L271 2462587V32 68nH C420...
Page 258 UHF PCB 8486458Z03 Parts List 4-64 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. R103 0662057M41 R309 0662057M01 R405 0662057M01 R475 0662057M01 R104 0662057N15 R310 NOT PLACED R406...
Page 259 455kHz Ceramic Discriminator 1485777Z01 Insulator (KAPTON) 8486458Z03 UHF B1 PC Board * Motorola Depot Servicing only Reference designators with an asterisk indicate components which are not field replaceable because they need to be calibrated with specialized factory equipment after installation.
Page 260 UHF PCB 8486458Z03 Parts List 4-66...
Page 261 Professional Radio GP Series 800 MHz (806 - 870MHz) Service Information Issue: November 2004...
Page 262 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 263 Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 GP240/GP280/GP540/GP580 Model Chart............1-1 2.0 Technical Specifications ..................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 800 MHz Transmitter ...................2-1 2.1 Power Amplifier ....................2-1 2.2 Antenna Switch....................2-2 2.3 Harmonic Filter ....................2-2 2.4 Antenna Matching Network ................2-2 2.5 Power Control Integrated Circuit (PCIC) ............2-2 3.0 800 MHz Receiver ....................2-3...
Page 265: Chapter 1 Model Chart And Technical Specifications
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS GP240/GP280/GP540/GP580 Model Chart Professional GP200/GP500 Series (800 MHz) Model Description MDH25UCC6FC3 GP540 800MHz 806-870MHz 2.5W MDH25UCH6FC6 GP580 800MHz 806-870MHz 2.5W MDH25UCC6FB3 GP240 800MHz 806-870MHz 2.5W MDH25UCH6FB6 GP280 800MHz 806-870MHz 2.5W Item Description *PMLF4020_ GP240/GP540 800MHz Back Cover Kit *PMLF4021_ GP280/GP580 800MHz Back Cover Kit...
Page 266: Technical Specifications
MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specifications Channel Capacity GP240 GP280 128 in conv. Mode GP540 GP580 ±20% Power Supply Rechargeable battery 7.5Volts Dimensions: H x W x D (mm) Height excluding knobs GP240/280/540/580 With standard high capacity NiMH battery 137 x 57.5 x 37.5...
Page 267 Technical Specifications Transmitter 800 MHz 806 - 825 MHz *Frequencies - Full Bandsplit 851 - 870 MHz Channel Spacing 25 and 20 kHz Frequency Stability ±1.5PPM (-30°C to +60°C) 806 - 825 MHz: 1-2.5W RF Output NiMH @ 7.5V: 851 - 870 MHz: 1-2.0W Audio Distortion: <5% @ 1000Hz, 60% Rated Max.
Page 268 MODEL CHART AND TECHNICAL SPECIFICATIONS...
Page 269: Chapter 2 Theory Of Operation
Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the UHF circuits in the radio. For details of the theory of operation and trouble shooting for the the associated Controller circuits refer to the Controller Section of this manual.
Page 270: Antenna Switch
THEORY OF OPERATION This RF driver IC is capable of supplying an output power of 0.3W (pin 13 and 14) with an input signal of 2.5mW (4dBm) (pin16). The current drain would typically be 200mA while operating in the frequency range of 806-870MHz. The 85Y73 LDMOS PA is capable of supplying an output power of 4.5W with an input signal of 0.3W.
Page 271: Receiver Front End
800 MHz Receiver 800 MHz Receiver The receiver functions are shown in Figure 2-20 and are described in the paragraphs that follow. Antenna Pin Diode 3-Pole 3-Pole Antenna Ceramic Ceramic Crystal RFJack Switch Block Filter Block Filter Mixer Filter Processing First LO from FGU Recovered Audio...
Page 272: Receiver Back End
THEORY OF OPERATION The IF signal coming out of the mixer is transferred to the crystal filter (FL350) through a resistive pad and a diplexer (C312 and L306). Matching to the input of the crystal filter is provided by L353,L354, C377, and C378. The crystal filter provides the necessary selectivity and intermodulation protection.
Page 273: Automatic Gain Control (Agc)
800 MHz Receiver Automatic Gain Control (AGC) ( Refer to the 800 MHz Receiver Front End and Receiver Back End schematic diagrams ) The automatic gain control circuit provides automatic gain reduction of both the low noise amplifier in the receiver front end and the IF amplifier in the receiver backend. This action is necessary to prevent overloading of the backend IF IC.
Page 274: Frequency Generation Circuit
THEORY OF OPERATION Frequency Generation Circuit ( Refer to Figure 2-3 and the 800 MHz Frequency Synthesizer schematic diagram ) The frequency generation circuit is shown in Figure 2-21. The circuit is composed of the two main ICs: ■ Fractional-N synthesizer, U201 ■...
Page 275: Synthesizer
Frequency Generation Circuit Synthesizer ( Refer to Figure 2-4 and the 800 MHz Synthesizer schematic diagram) The Fractional-N Synthesizer uses a 16.8MHz crystal (FL201) to provide a reference for the system. The LVFractN IC (U201) further divides this to 2.1MHz, 2.225MHz, and 2.4MHz as reference frequencies.
Page 276: Voltage Controlled Oscillator (Vco)
THEORY OF OPERATION Voltage Controlled Oscillator (VCO) ( Refer to Figure 2-5 and the 800 MHz Voltage Controlled Oscillator schematic diagram) The VCOBIC (U250) in conjunction with the Fractional-N synthesizer (U201) generates RF in both the receive and the transmit modes of operation. The TRB line (U250 pin 19) determines which oscillator and buffer will be enabled.
Page 277: Trunked Radio System
Privacy Plus Trunked Systems 4.3.1 Privacy Plus is a proprietary trunking protocol developed by Motorola which allows a large number of users to share small amounts of frequencies without interfering with each other. The Privacy Plus configuration consists of shared multiple channel repeaters. The Privacy Plus Trunked system includes a Central Controller, which directs the users to the open channels.
Page 278: Voice Storage Circuits
2-10 THEORY OF OPERATION 4.3.3 MPT Trunked Systems MPT (Ministry of Post and Telecommunications) developed a signalling standard (MPT1327) for trunked private land mobile radio systems. This standard defines the protocol rules for communication between a trunking system controller (TSC) and user’s radio units. The protocol offers a broad range of options which can be implemented in subsets according to user requirements.
Page 279 Frequency Generation Circuit 2-11 Low Speed Data Filter This analog circuitry is a 4 pole, 150 Hz cutoff low pass filter comprised of U603-1, U603-2 and associated passive components. In receive mode, it removes noise and voice band signals leaving only the low speed data waveform which is applied to the ADC input of the MCU.
Page 280 2-12 THEORY OF OPERATION...
Page 281: Chapter 3 Troubleshooting Charts
Chapter 3 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) START Bad SINAD Bad 20dB Quieting No Recovered Audio udio Check Controller at pin 27 of U351? Spray of inject 1st IF into XTAL Filter IF Freq: 109.65MHz Check Q350 bias circuitry for faults.
Page 282 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) Inject RF into J101 Trace IF signal the level of Signal from L353 to the IF signal of the at L353 U352. Check for output of U352 as bad XTAL filter. indicated Before replacing U351, check...
Page 283: Troubleshooting Flow Chart For Transmitter
Troubleshooting Flow Chart for Transmitter Troubleshooting Flow Chart for Transmitter START Low Power No Power No Power out or Low Power overall radio current between 0.8 and 1.3 A when transmitting there a Replace F501 the fuse F501 Check L101, L102, short circuit C101, CR101 for after C113...
Page 284: Troubleshooting Flow Chart For Synthesizer
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Synthesizer Start 3.3V at U201 pins Check 5, 20, 34& U248 & L202 Visual Correct check of the Check Problem Board OK D201,D202, C244, C245, C246 & C228 U201 16.8MHz 16.8MHz at pin 6 of Pin47 AT = Replace Signal at...
Page 285: Troubleshooting Flow Chart For Vco
Troubleshooting Flow Chart for VCO Troubleshooting Flow Chart for VCO START Is Tx signal Is LO signal VCO is OK. present at the PA present at the driver IC, U101? mixer IC U301? Resolder or Is resonator IC replace U205 soldered U205.
Page 286: Troubleshooting Flow Chart For Passport Trunking
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for PassPort Trunking Start Check Radio Operation on a Non PassPort Zone with a Conventional Personality without the Option Board Enabled Check Radio PassPort Programming using CPS Check Switched Battery and Vdd from Radio on PTCB Check Radio PassPort Programming using CPS Demod...
Page 287: Allocation Of Schematics And Circuit Boards
Chapter 4 800MHZ /PCB/SCHEMATICS/PARTS LIST Allocation of Schematics and Circuit Boards Controller Circuits The 800MHz circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This chapter shows the schematics for the 800MHz circuits only, refer to the Controller section for details of the related Controller circuits.The PCB component layouts and the Parts Lists in this Chapter show both the Controller and UHF circuit components.
Page 288 800MHz /PCB/schematics/Parts list...
Page 289: 800Mhz Pcb 8480641Z03 / Schematics
800MHz PCB 8480641Z03 / Schematics 800MHz PCB 8480641Z03 / Schematics SH400 R410 E408 C423 E409 SH352 PB503 PB502 PB504 PB501 E407 R437 C521 VR504 C505 R359 SH351 R418 R355 C371 SH350 L355 FL201 C376 C361 C391 C378 C392 B503 B504 CR350 FL350 U352...
Page 290 800MHz PCB 8480641Z03 / Schematics M502 M501 M400 8 4 8 0 6 4 1 Z 0 3 C523 VR506 C522 VR505 SH402 C436 SH353 C437 R426 VR507 L505 C241 E405 S502 R350 C381 R214 C383 E404 VR503 C380 C350 E406 C238 C211...
Page 291 800MHz PCB 8480641Z03 / Schematics L505 390nH RADIO_CODE UNSWB+ BATT_CODE B501 F501 DATA BATT- BATTERY_CONTACT S502 MECH_SWB+ BATT+ VR502 TAB2 C502 VR503 C526 C530 C524 C525 C503 0.47uF CR501 6.8V 82pF 10uF 82pF 68pF 18pF TAB1 CHASSIS_CONTACTS R507 M501 M502 6.8V C505 VR501...
Page 292 800MHz PCB 8480641Z03 / Schematics C312 30pF L306 -50.3 dBm @ 109.65MHz Note 1 68nH R322 R312 R320 C304 C307 68pF 0.1µF R321 R310 C306 L302 68pF 220nH -41 dBm Note 1, Note 2 C303 C305 FL301 U301 56pF L304 -53 dBm Note 1, Note 2 10pF R309...
Page 293 800MHz PCB 8480641Z03 / Schematics L350 R350 Vdda 2.2µH C350 C352 10µF AGC Processing .022µF 2.5V Note 2 3V Note 3 FE_AGC U350 C353 0.22µF C354 R351 R352 L351 .022µF RSSI 390nH R353 R355 1.53V Note 2 R354 C355 4700pF IF Amplifier C356 0.3V Note 3...
Page 294 800MHz PCB 8480641Z03 / Schematics PB503 L505 LI_ION B503 BATT_CODE BATT_ID 390nH L200 B504 VR506 VR503 C523 6.8V 6.8V .01µF 2.2µH C206 C207 D201 2.2µF 0.1µF C244 PB502 .01µF R200 C245 U247 .01µF C522 VR505 .01µF SWB+ 6.8V C246 .01µF D202 (SOURCE) C200...
Page 295 800MHz PCB 8480641Z03 / Schematics DATA_2_VCO 4.6 V Super Filter DATA Supply from U201 CLK_2_VCO RX VCO Components CSX_2_VCO R256 C255 R255 Freq Range UNSWB+_2_VCO 741 to 761 MHz L259 R264 UNSWB+ 0.5pF C259 C262 U205 2.2µF 220nH 0.1µF RESET_2_VCO L253 C267 900 MHz...
Page 296 800MHz PCB 8480641Z03 / Schematics 4-10 6V to 9V E101 C158 R101 BEAD R104 56pF UNSWB+ C162 R102 C160 C161 C163 C164 68pF 18pF 82pF 18pF C152 C153 68pF E102 18pF 68pF 0.07V to 0.12V C108 L104 C159 C112 C147 220nH 56pF 68pF...
Page 297: 800Mhz Pcb 8480641Z03 Parts List
800MHz PCB 8480641Z03 Parts List 4-11 800MHz PCB 8480641Z03 Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Parts List Part No. Part No. Part No. C154 2113743N44 Capacitor Chip 56pF C254 2113743N46 Capacitor Chip 68pF C355 2113743E20 Capacitor Chip 0.1µF...
Page 298 800MHz PCB 8480641Z03 Parts List 4-12 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C421 2113928N01 Capacitor Chip 0.1µF C520 to 2113743L41 Capacitor Chip .01µF L113 2462587V27 Inductor 27nH...
Page 299 Mechanical Shield 15Z01 R318 0662057M72 Resistor Chip 820 R436 0662057M74 Resistor Chip 1K SH403 2680516Z01 Mechanical Shield 16Z01 * Motorola Depot Servicing only R320 0662057M52 Resistor Chip 120 R437 0662057M01 Resistor Chip 0 U101 5102463J66 Analog IC Amp RF2103P Reference designators with an asterisk indicate...
Page 300 800MHz PCB 8480641Z03 Parts List 4-14 Intentionally Left Blank...

Motorola GP Series Service Manual

Table of Contents

Chapter 1 MODEL CHART and TECHNICAL SPECIFICATIONS

Chapter 2 THEORY of OPERATION

Chapter 3 TROUBLESHOOTING CHARTS

Uhf2 Pcb/Schematics/Parts Lists

Chapter 4 UHF2 PCB/SCHEMATICS/PARTS LISTS

Table of Contents

Table of Contents

Table of Contents

Table of Contents

Table of Contents

Quick Links

Chapters

Troubleshooting

Related Manuals for Motorola GP Series

Summary of Contents for Motorola GP Series

Table of Contents