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Motorola FLASHpot Handie-Talkie MTX Series Service Manual

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Summary of Contents for Motorola FLASHpot Handie-Talkie MTX Series

  • Page 1 ™ ® ™ HT 1000 , JT 1000 , MT 2000 ™ MTS 2000 , and MTX Series Handie-Talkie ® Portable Radios Service Manual JT 1000 AB C D E F MTX LS P R S W X Y HOME HT 1000 MTS 2000 MTS 2000...
  • Page 2 Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product.
  • Page 3 Handie-Talkie Portable Radios ® Service Manual , Motorola, Handie-Talkie, Private-Line, Digital Private-Line, FLASHport, HearClear, JT 1000, HT 1000, MT 2000, MTS 2000, MTX 838, MTX 8000, and MTX 9000 are trademarks of Motorola, Inc. © 2001, 1998 by Motorola, Inc.

  • Page 4: Radio Frequency (Rf) Operational Characteristics

    RF energy. Radio Operation Your Motorola radio is designed to comply with the following national and international standards and guidelines regarding exposure of and EME Exposure human beings to radio frequency electromagnetic energy (EME): •...
  • Page 5 Holding the antenna affects call quality and may cause the radio to operate at a higher power level than needed. Approved Accessories For a list of approved Motorola accessories, look in the appendix or accessory section of your radio’s User Guide. Electromagnetic...

  • Page 6: Operational Warnings

    • Other Medical Devices If you use any other personal medical device, consult the manufacturer of your device to determine if it is adequately shielded from RF energy. Your physician may be able to assist you in obtaining this information. Safety And General Use While Driving Check the laws and regulations on the use of radios in the area where...

  • Page 7: Operational Cautions

    Operational Cautions C a u t i o n Antennas Do not use any portable radio that has a damaged antenna. If a damaged antenna comes into contact with your skin, a minor burn can result. Batteries All batteries can cause property damage and/or bodily injury such as burns if a conductive material such as jewelry, keys, or beaded chains touch exposed terminals.
  • Page 8 Product unit in any way that exposes the internal electrical circuits of the unit. Radios must ship from the Motorola manufacturing facility with the hazardous atmosphere capability and FM Approval labeling. Radios will not be “upgraded” to this capability and labeled in the field.
  • Page 9 FMRC Approved model. Do Not Substitute The communications equipment package that Motorola submits to FMRC for testing and approval is tested as a system that consists of the Options or Accessories...
  • Page 10 Notes Safety 8...
  • Page 11 MTS 2000 , and MTX Series ® Handie-Talkie Portable Radios Service Manual Motorola Publication Number 68P81200C75-A Issue Dates of Original and Revised (FMR) Pages are: Original: March, 2001 The Number of pages in this publication is 161 consisting of the following:...
  • Page 12 (THIS PAGE INTENTIONALLY LEFT BLANK)

  • Page 13: Table Of Contents

    Contents Safety and General Information ........Safety 2 Radio Frequency (RF) Operational Characteristics .
  • Page 14 4 - Error-Code Displays ........... . 15 Power-up Display Codes .
  • Page 15 NUE7232C, NUE7241D, NUE7267A, NUE7268A, NUE7273A, and NUE7275A UHF (450-520MHz) Transceiver Boards’ Parts List and Component Location Diagrams ..72 NUE7232C, NUE7241D, NUE7267A, NUE7268A, NUE7273A, and NUE7275A UHF (450-520MHz) Transceiver Boards’ Schematic Diagram ......73 NUE7267B, NUE7268B, NUE7273B, and NUE7275B UHF (450-520MHz) Transceiver Boards’...

  • Page 16: List Of Tables

    10 - Replacement Parts Ordering ......... . . 103 Introduction .
  • Page 17 Related Publications Available Separately Service Manual (earliest version radios; first issue- 4/92) ......68P81200C20 Service Manual (early version radios;...

  • Page 18: Model Numbering System

    Model Numbering System Typical Model Number: Position: 12 13 Position 1 - Type of Unit Positions 13 - 16 “SP” Model Suffix H = Hand-Held Portable Position 12 - Unique Model Variations Positions 2 & 3 - Model Series C = Cenelec N = Standard Package Position 4 - Frequency Band Position 11 - Version...

  • Page 19: Model Charts Model Programming, Flashing, And Cloning

    Model Charts Model Programming, Flashing, and Cloning Model Charts Four model charts cover the three families of radios discussed in this publication: General Description • Conventional Systems Radios, HT 1000 • Conventional Systems Radios, JT 1000 and MT 2000 • Private Systems Radios •...

  • Page 20: Model Chart, Conventional Systems Radios (Ht 1000 Models)

    MODEL CHART Conventional Systems Radios (HT 1000 Models) MODEL NUMBER DESCRIPTION H01KDC9AA1DN VHF, 2F, 5- to 1-Watt H01KDC9AA3DN VHF, 16F, 5- to 1-Watt H01RDC9AA1DN UHF B1, 2F, 4- to 1-Watt H01RDC9AA3DN UHF B1, 16F, 4- to 1-Watt H01SDC9AA1DN UHF B2, 2F, 4- to 1-Watt H01SDC9AA3DN UHF B2, 16F, 4- to 1-Watt H01UCC6AA3DN...

  • Page 21: Model Chart, Conventional Systems Radios (Jt 1000 And Mt 2000 Models)

    MODEL CHART Conventional Systems Radios (JT 1000 and MT 2000 Models) MODEL NUMBER DESCRIPTION H01KDH9PA3AN JT 1000, VHF, 16CH, Front Display H01RDH9PA3AN JT 1000, UHF B1, 16CH, Front Display H01SDH9PA3AN JT 1000, UHF B2, 16CH, Front Display H01KDD9AA4AN MT 2000, VHF, 16F, 5- to 1-Watt, Top Display H01KDH9AA7AN MT 2000, VHF, 16CH, 5- to 1-Watt, Front Display H01RDD9AA4AN...

  • Page 22: Model Chart, Private Systems Radios (Mts 2000 Models)

    MODEL CHART Private Systems Radios (MTS 2000 Models) MODEL NUMBER DESCRIPTION H01KDD9PW1BN VHF, 16-Mode, Top Display, 5- to 1-Watt H01KDF9PW1BN VHF, 160-Mode, Front Display, Limited Keypad, 5- to 1-Watt H01KDH9PW1BN VHF, 160-Mode, Front Display, Full Keypad, 5- to 1-Watt H01RDD9PW1BN UHF B1, 16-Mode, Top Display, 4- to 1-Watt H01RDF9PW1BN UHF B1, 160-Mode, Front Display, Limited Keypad, 4- to 1-Watt...

  • Page 23: Model Chart, Shared Systems Radios

    MODEL CHART Shared Systems Radios (MTX 838, MTX 8000, MTX•LS, and MTX 9000 Models) MODEL NUMBER DESCRIPTION MTX 838 H01KDC9DB3AN VHF, 16-Mode, 5- to 1-Watt H01KDD9DB4AN VHF, 99-Mode, Top Display, 5- to 1-Watt H01KDF9DB5AN VHF, 160-Mode, Front Display, Limited Keypad, 5- to 1-Watt H01KDH9DB7AN VHF, 160-Mode, Front Display, Full Keypad, 5- to 1-Watt H01RDC9DB3AN...

  • Page 24: List Of Antennas

    List of Antennas ANTENNA KIT NOS. DESCRIPTION NAD6566* Helical (136 - 151MHz) NAD6567* Helical (151 - 162MHz) NAD6568* Helical (162 - 174MHz) NAD6563* Helical Wideband (136 - 174MHz) NAE6546* Helical (403 - 435MHz) NAE6547* Helical (435 - 470MHz) NAE6548* Helical (470 - 512MHz) NAE6549* Whip (403 - 512MHz) NAF5037*...

  • Page 25: Maintenance Specifications For Vhf Radios

    Maintenance Specifications for VHF Radios (All Specifications Are Per Electronic Industries Association (EIA) 316B Unless Otherwise Noted.) GENERAL RECEIVER TRANSMITTER Frequency Range: 136–178MHz FCC Designation: AZ489FT3768 RF Power: 136-174MHz 1-5 Watts Power Supply: Nickel-Cadmium Battery Bandwidth: 42MHz 174-178MHz 1-4 Watts Battery Voltage: Nominal: 7.5 Volts...

  • Page 26: Maintenance Specifications For 800Mhz Radios

    Maintenance Specifications for 800MHz Radios (All Specifications Are Per Electronic Industries Association (EIA) 316B Unless Otherwise Noted.) GENERAL RECEIVER TRANSMITTER RF Power: 3 Watts FCC Designation: AZ489FT5747 Frequency Range: 851–870MHz Power Supply: Nickel-Cadmium Battery Bandwidth: 19MHz Frequency Range: 806–824MHz Battery Voltage: Nominal: 7.5 Volts 851–869MHz...

  • Page 27: Glossary

    FLASHport options are in a radio. FLASHport™ A Motorola term that describes the ability of a radio to change memory. Every FLASHport radio contains a FLASHport EEPROM memory chip that can be software written and rewritten to, again and again.
  • Page 28 Phase-Locked Loop; a circuit in which an oscillator is kept in phase with a reference, usually after passing through a frequency divider. Push-To-Talk; the switch located on the left side of the radio which, when pressed, causes the radio to transmit. Registers Short-term data-storage circuits within the microcontrol unit or programmable logic IC.

  • Page 29: Introduction

    Introduction This manual includes safety information, model charts, specifications, fundamental disassembly/reassembly procedures; schematic diagrams, printed circuit board details, flex circuit diagrams, and several parts lists to completely cover the HT 1000, JT 1000, MT 2000, MTS 2000, and MTX series radios. Hereafter, the text will refer collectively to these radios as “this family of radios.”...

  • Page 30: Safety And General Information

    Notes...

  • Page 31: Electromagnetic Interference/Compatibility

    The “Characteristics” column is included so that equivalent equipment may be substituted; however, when no information is provided in this column, the specific Motorola model listed is either a unique item or no substitution is recommended. Table 1 Recommended Test Equipment...

  • Page 32: Safety And General

    Service Aids and Refer to the “Service Aids” in Table 2 and “Recommended Service Tools” list in Table 3 for a listing and description of the service aids and Recommended tools designed specifically for servicing this family of radios, as well as Tools the more common tools required to disassemble and properly maintain the radio.

  • Page 33: Table 2 Service Aids

    The following table lists service aids recommended for working on this family of radios. These items are available from Aftermarket Products Division (APD). Table 2 Service Aids MOTOROLA PART DESCRIPTION APPLICATION Servicers Video Tape Video Tape Includes Radio Introduction. RKN-4035D RIB/Radio/test set cable Connects radio to RTX-4005B Test Box and RIB.

  • Page 34: Table 3 Recommended Service Tools

    Service Tools The following table lists the tools recommended for working on this family of radios; these tools are also available from Motorola. The R-1319A solder/desolder workstation requires the use of some reflow nozzles which are included with the workstation Table 3 Recommended Service Tools MOTOROLA PART NO.

  • Page 35: Transceiver Performance Testing

    Transceiver Performance Testing General The HT 1000, JT 1000, MT 2000, MTS 2000, and MTX series radios have been prepared to meet published specifications through their manufacturing process, with the use of laboratory-quality test equipment of highest accuracy. The recommended field service equipment approaches the accuracy of the manufacturing equipment with a few exceptions.

  • Page 36: Table 5 Test Environments, Ht 1000/Jt 1000 Radios

    with Option•Mate interface plug enabled through the HT 1000 RSS, TX and RX audio will be muted. Do not test Analog Voice Security (AVS) installed radios in the TEST MODE. When the HT 1000/JT 1000 radio is operating in its normal environment, the radio's microcontroller controls the RF channel selection, transmitter key-up, and receiver muting.

  • Page 37: Table 6 Test Frequencies, Ht 1000 / Jt 1000

    Table 6 Test Frequencies, HT 1000 / JT 1000 NO. OF TEST UHF BAND 1 UHF BAND 2 BEEPS CHANNEL TX #1 136.025 403.100 450.025 806.0125 RX #1 136.075 403.150 450.075 851.0625 TX #2 142.125 424.850 465.225 815.0125 RX #2 142.175 424.900 465.275...
  • Page 38 clockwise. The loudness of tone beeps will increase and decrease accordingly. NOTE: During test mode, the volume level is not regulated to the same limits as during normal radio operation. To exit test mode, turn the radio off then back on. RF Test Mode, MT 2000, When the MT 2000, MTS 2000, or MTX series radio is operating in its normal environment, the radio's microcomputer controls the RF...
  • Page 39 5. Release the orange button; ”3/0” appears, which indicates that switch 3 is in the open condition. 6. Press the orange button again; “3/1” appears, which indicates that switch 3 is in the closed condition. 7. Rotate the mode selector knob; ”4/0” thru ”4/15” appears, which indicates that knob 4 is in mode position 1 thru 15.

  • Page 40: Table 7 Test Environments, Mt 2000, Mts 2000, And Mtx Series Radios

    Table 7 Test Environments, MT 2000, MTS 2000, and MTX Series Radios NO. OF BEEPS DISPLAY DESCRIPTION FUNCTION Carrier Squelch RX: unsquelch if carrier detected TX: mic audio Hear Clear** RX: unsquelch if carrier detected TX: compressed mic audio Tone RX: unsquelch if carrier and tone (192.8Hz) detected Private-Line TX: mic audio + tone (192.8Hz)

  • Page 41: Table 9 Receiver Performance Checks

    Table 9 Receiver Performance Checks COMMUNICATIONS TEST NAME RADIO TEST SET COMMENTS ANALYZER Reference Mode: PWR MON TEST MODE, PTT to continuous Frequency error to be Frequency 4th channel test frequency◊ 4 CSQ during the ±150Hz Monitor: Frequency error output at performance check) Input at RF In/Out antenna...

  • Page 42: Table 10 Transmitter Performance Checks

    Table 10 Transmitter Performance Checks TEST COMMUNICATIONS RADIO TEST SET COMMENTS NAME ANALYZER Reference Mode: PWR MON TEST MODE, PTT to continuous Frequency error to be < 150Hz. Frequency 4th channel test frequency◊ 4 CSQ (during the Monitor: Frequency error performance Input at rf In/Out.

  • Page 43: Error-Code Displays

    Error-Code Displays Power-up Display At power-up, the radio performs cursory tests to determine if its basic electronics and software are in working order. Problems detected Codes during these tests are presented as error codes on the radio display. The presence of an error code should prompt the user that a problem exists and that a service technician should be contacted.

  • Page 44: Operational Display Codes

    Operational Display During operation, the radio performs dynamic tests to determine if it is working properly. Problems detected during these tests are presented Codes as error codes on the radio display. The presence of an error code should prompt a user that a problem exists and that a service technician should be contacted.

  • Page 45: Radio Alignment Procedure

    Radio Alignment Procedure General An IBM PC (personal computer) and Radio Service Software (RSS) are required to align the radio. Refer to the applicable RSS manual for installation and setup procedures for the software. To perform the alignment procedures, the radio must be connected to the PC, RIB (radio interface box), and Universal Test Set as shown in Figure 1.
  • Page 46 Service Menu Signalling Transmitter Receiver Alignment Alignment Alignment Menu Menu Menu F2 - Reference Oscillator F2 - Front End (VHF/UHF) F2 - DTMF F3 - Tx Power F3 - Rated Audio F3 - Trunking F4 - Tx Dev Balance F4 - Squelch (25/30 kHz) F4 - MDC 1200 F5 - Tx Dev Limit F5 - Squelch (20 kHz)

  • Page 47: Reference Oscillator Alignment

    Each SERVICE screen provides the capability to increase or decrease the ‘softpot’ value with the keyboard UP/DOWN arrow keys respectively. A graphical scale is displayed indicating the minimum, maximum, and proposed value of the softpot, as shown in Figure 3. Min.

  • Page 48: Front-End Pre-Selector (Vhf/Uhf Only)

    Front-End NOTE: This procedure is only required for tuning the Pre-Selector front-end filter varactors in the VHF and UHF models. The 800 and 900 MHz models utilize a (VHF/UHF only) stripline pre-selector. 1. Set the Test Box (RTX4005B) meter selection switch to the “VOL” position, and connect a dc voltmeter capable of 1mV resolution on a 2V scale to the Test Box AC/DC meter port to monitor the Received Signal Strength Indicator (RSSI).

  • Page 49: Squelch

    8. Select the Hear Clear RATED AUDIO softpot, and adjust the UP/ DOWN arrow keys to obtain rated audio (3.74 Vrms) into a speaker (28 ohms) or equivalent resistive load. 9. Press F8 to program the softpot value. 10.Press F10 to return to the RECEIVER menu. Squelch NOTE: Verify that audio output is set to rated audio (3.74 Vrms)

  • Page 50: Transmit Deviation Balance (Compensation)

    Table 15 Transmit Power Setting Power Level Test Frequencies Power Level Test Frequencies 136 - 174MHz 177.975MHz 450 - 512MHz 512 - 520MHz 5.2 - 5.4 4.2 - 4.4 4.2 - 4.4 3.2 - 3.4 1.2 - 1.4 1.2 - 1.4 1.2 - 1.4 1.2 - 1.4 800 MHz...

  • Page 51: Transmit Deviation Limit

    9. Repeat steps 3 through 8 for the remaining test frequencies. 10.Press F10 to return to the TRANSMIT menu. NOTE: The step size change for step 5 is approximately 2.5% per softpot value. This adjustment should only be made to the 3kHz deviation.

  • Page 52: Vco Crossover Frequency

    Table 17 Transmit Deviation Limit Reference Channel Spacing Deviation (kHz) 20 KHz 3.40 - 3.60 12.5 KHz 2.20 - 2.30 4. Press F6 to dekey the radio, and press F8 to program the softpot value. 5. Press F10 to return to the TRANSMIT menu. VCO Crossover NOTE: This procedure is only required after the field...
  • Page 53 VCO varactors (CR201, 202, and 203) in “C” and later kits are not interchangeable with VCO varactors in earlier kits; Motorola parts and part numbers are different. When replacing a VCO varactor, Identify the transceiver board and order replacement parts from the applicable parts list.
  • Page 54 486.025MHz. VCO varactors (CR201, 203, 207, 208, and 209) in “C” and later kits are not interchangeable with VCO varactors in earlier kits; Motorola parts and part numbers are different. When replacing a VCO varactor,...

  • Page 55: Signalling Deviation

    RX VCO Crossover 1. From the SERVICE menu, press F3 to select RECEIVER alignment. Procedure 2. Press F5 to select the RECEIVE VCO CROSSOVER softpot. The screen will indicate the receive test frequency to be used. 3. Connect a dc voltmeter capable of 1mVolt resolution to test point 5 (TP5), which is accessible through a hole in the bottom side VCO circuitry shield.

  • Page 56: Alignment Procedure Conclusion

    Table 18 Signalling Deviation Channel Spacing High Single DTMF (kHz) Speed Tone 25 / 30 3.05-3.45 2.5-3.5 3.40-3.75 3.0-4.0 20 (VHF/UHF) 2.44-2.76 2.0-2.8 2.6-3.0 2.4-3.2 20 (821-824, 866-869) 2.44-2.76 2.0-2.8 2.6-3.0 2.4-3.2 12.5 1.55-1.85 1.40-1.75 1.640-1.875 1.5-2.0 6. Press F6 again to dekey the radio. 7.

  • Page 57: Disassembly And Reassembly

    2. Ground the working surface of the service bench to protect the CMOS device. We recommend using the Motorola Static Protection Assembly (part number 0180386A82), which includes a wrist strap, two ground cords, a table mat, and a floor mat.

  • Page 58: General

    5. Separate the front cover assembly from the internal electronics (chassis) (see Figure 5). a. Insert the chassis/front cover separation tool (Motorola part no. 6680334E07) or like instrument in the slotted area at the bottom center of the radio. Take care not to mar the O-ring...
  • Page 59 Separation Tool Chassis Assembly Front Cover Assembly MAEPF-22571- A Figure 5 Separating the Cover From the Chassis b. Pry the bottom of the chassis free from the cover by pushing the separation tool down and rotating the handle of the separation tool over and behind the base of the radio.
  • Page 60 Figure 7 Disconnecting the Flex a. Use the flex connector opening tool, large curved end (Motorola part no. 6680334E08), or like instrument to help raise the sliding portion of the connector approximately 1/8 of an inch from its seated position. A slight prying action will achieve the best results for unlocking the connector.

  • Page 61: Disassembly Of Control Top

    a. Loosen the front shield by prying each of the three clips (four tabs on early front shield) away from the chassis. Be careful not to pry the clips/tabs any more than is necessary to free them from their respective retaining slots. To completely loosen the shield from the chassis, a slight lifting and clockwise twisting action may be required.

  • Page 62: Disassembly Of Front Cover Assembly

    Clip 5 Clip 1 Clip 4 Switch Housing Cover Switch Housing Clip 3 Clip 2 Lift MAEPF-22576-O Figure 10 Switch Housing Retaining Clips c. The cover will pop loose from the switch housing. 3. Push the three switches and the LED out of the switch housing. 4.
  • Page 63 NOTE: The speaker and front cover flex are held in position with a three-leg retainer bracket. The legs of the bracket are secured by slots in the front cover. When removing the retainer bracket, use caution not to damage the speaker. a.

  • Page 64: Reassembly

    Reassembly Reassembly is the reverse of disassembly. Some suggestions and illustrations are provided to help you more easily reassemble the radio. Keypad/Display Board 1. If applicable, replace the rubber keypad. (front display model 2. Place the keypad/display board into the front cover housing at an radios only) angle such that the three small slots on the edge of the board slide under the three mating retaining tabs.
  • Page 65 While keeping the clip hook in to the front shield slot, press the bent portion of the clip toward the front shield until it snaps into place. The two remaining clips (Motorola part number 4285350C02) are stamped “2”. Insert these clips into the recessed areas on the front shield stamped “2”, and snap them into place as...
  • Page 66 are raised enough to see plating under them, then the flex is not fully seated. Flex Not Fully Seated Flex Fully Seated in Connector in Connector Plating Reliefs Misaligned MAEPF-22579-A Figure 14 Seating the Flex 5. Reinstall the rubber controls top seal on the control top. NOTE: Two tabs are provided in the emergency button area to help hold the seal in place.
  • Page 67 cover clip and the chassis.With the top of the chassis fully seated, lower the bottom of the chassis and press it into the front cover assembly until it snaps into place. 4. Check the emergency button again. If it is cocked to one side, repositioning it will be necessary.
  • Page 68 Notes...

  • Page 69: Maintenance

    Maintenance Introduction This section of the manual describes preventive maintenance, safe handling of CMOS devices, and repair procedures and techniques. Each of these topics provides information vital to the successful operation and maintenance of your radio. Preventive In order to avoid operating outside the limits set by the FCC, it is recommended that the reference oscillator of the HT 1000, JT 1000, Maintenance MT 2000, MTS 2000, and MTX radio be aligned every time the radio is...

  • Page 70: Safe Handling Of Cmos Devices

    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 office listed in the “Replacement Parts Ordering”...
  • Page 71 work for shorts due to solder bridges. When removing modules with metal enclosures, be sure to desolder the enclosure ground tabs as well as the module pins. Flexible Circuits The flexible circuits are made from a different material than the rigid boards, and different techniques must be used when soldering.
  • Page 72 Jumper Flex (on radios Jumper flexes are not available. They are replaced with connectors as described in paragraph “a” of this section. If the jumper flex needs to shipped prior to 7/94) be replaced, order Interconnect Kit REX4350A. The retrofit kit includes all of the parts required and detailed instructions on the removal of the old jumper flex, and the installation of the new connector arrangement.
  • Page 73 RF switch, they will be retained by the switch. Chip Components Use either the RLN-4062 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.
  • Page 74 PBGA components must be kept in the sealed bag (with moisture-indicator card) as supplied by C a u t i o n the Motorola Parts Department. Once the sealed bag is opened and/or the PBGA component subjected to ambient humidity (for an unknown...
  • Page 75 The application of heat to the PBGA device, beginning at ambient air temperature and ending with the PBGA component lifting from the circuit board, should take longer than 60 C a u t i o n seconds. If the PBGA component lifts from the circuit board earlier than 60 seconds: •...
  • Page 76 above the component. Turn on the heater and wait until the TSOP lifts off the circuit board. Once the part is off, turn off the heat, grab the part with a pair of tweezers, and turn off the vacuum pump. Prepare the circuit board for the new component by applying solder paste flux to the solder pads.
  • Page 77 component. But because the device is large, extra heating time is required to flow the pads. And as a result, neighboring components (especially those on the opposite side of the circuit board) will heat, reflow, and may inadvertently move. Be careful when performing the following procedure.
  • Page 78 the circuit board, making certain that the PA heatsink sits flush on the board. Position the heat-focus head over the RF PA and lower it to approximately 1/8”-1/4” (0.3cm-0.6cm)) above the PA cover. Turn on the heater and begin the reflow cycle. Heating time should not be less than two minutes.

  • Page 79: Exploded Views

    • basic radios • top-display radios • keypad radios • uni-board radios Determine which category describes your unit, and use the appropriate exploded view to help identify components with description and Motorola part number.

  • Page 80: Basic Radios And Basic Radios With Option Mate Optional

    - - - - - - - - - - LABEL, Agency Approval; not field - - - - - - - - - - LABEL, Rear; Information; not field replaceable replaceable 3305183R55 LABEL, Motorola 3205176Z01 O-RING, Contoured/SEAL, Antenna 3305183R56 LABEL, HT1000 2605891U03 SHIELD, Front (earlier radios)

  • Page 81: Top-Display Radios

    - - - - - - - - - LABEL, Agency Approval; not field replace- - - - - - - - - - LABEL, Rear; Information; not field able replaceable 3305183R55 LABEL, Motorola 3205176Z01 O-RING, Contoured/SEAL, Antenna 3305183R70 LABEL, MT 2000 2605891U03 SHIELD, Front (earlier radios)

  • Page 82: Keypad Radios

    7505870U02 KEYPAD, 6-key 4205507X01 STRAIN RELIEF 5105238U83 MODULE, Display See Note 1 CONNECTOR, Strip (P301/P704) 3305183R55 LABEL, Motorola See Note 2 PLUG, Connector (P404) 3305183R70 LABEL, MT2000 3205820V02 SEAL, Connector Plug or 3305183R71 LABEL, MTS2000 - - - - - - - - - LABEL, Rear;...

  • Page 83: Uni-Board Radios

    LABEL, Agency Approval; not field replaceable - - - - - - - - - - SPRING, PA; not field replaceable, order front shield (item 37) 3305183R55 LABEL, Motorola See Note 2 PLUG, Connector (P404) 3305252X18 LABEL, MTX•LS 3205820V02 SEAL, Connector Plug...
  • Page 84 Notes...

  • Page 85: Component Location Diagrams, Parts Lists,And Schematic Diagrams

    Component Location Diagrams, Parts Lists,and Schematic Diagrams Introduction General Except for the MTX•LS model, transceiver components and controller components reside on separate circuit boards. Refer to the model charts located in the front of this manual (prior to Section 1) to determine the controller board and transceiver board unique to your model radio.
  • Page 86 (µH) or nanohenrys (nH). 2. DC voltages are measured from point indicated to chassis ground using a high impedance (10 megohm) Motorola DC voltmeter or equivalent. Transmitter measurements should be made with a 1.2uF choke in series with the voltage probe to prevent circuit loading.
  • Page 87 U203, REF. OSC. U101, ALC U102, D/A NC16 NC12 XXXXX C BIAS NC17 NC11 CATH 1 16.8 M NC18 NC10 V CON 35U51 X RX_D/A WLYWW TXI1 TXI1 TXI1 INT CAP OUT 35U52 X YYWW TX_D/A VDD2 ANODE 2 WLYWW REF V RT BIAS RX 1...
  • Page 88 U705, MICROCOMPUTER U705, MICROCOMPUTER Open Controller Closed Controller 35U47 X XIRQ WLYWW 35U56 X VSSL RESET VSSR VDDL WLYWW VDDR XIRQ XTAL MOD B EXTAL VDD SYN RESET MODA/LIR MAEPF-24672-A MAEPF-24678-A U710, SLIC IV Open Controller U713, EEPROM TECHNICAL PUBLICATIONS DEPT. DESCRIPTION JEDI/VISAR DWG.
  • Page 89 Universal Connector Pin Numbers and Signal RF GROUND FROM P402 RF HOT Assignments OPTION SELECT 1 EXTERNAL SPEAKER EXTERNAL MICROPHONE OPTION B+ OPTION SELECT 2 SPEAKER COMMON FROM P403 REQUEST TO SEND GROUND BUSY CLEAR TO SEND TRANSMIT DATA MODE CONTROL DATA Universal Connector Option Select...
  • Page 90 Notes...

This manual is also suitable for:

Flashpot handie-talkie ht 1000Flashpot handie-talkie jt 1000Flashpot handie-talkie mt 2000Flashpot handie-talkie mts 2000

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