Kenwood NX-300 Service Manual

Uhf digital transceiver

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Service manual (172 pages)

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Summary of Contents for Kenwood NX-300

Page 1: Table Of Contents
SERVICE MANUAL REVISED © 2014-7 PRINTED IN JAPAN RQ017 ( K ) B5B-7110-10 This service manual has been revised due to the DSP IC modification of the control unit. NX-300(G) K,K2 NX-300(G) K3,K4 Knob (Selector) Helical Antenna Knob (Selector)
Page 2: General
KENWOOD product memories. While every precaution has been taken in the preparation Transceivers containing AMBE+2™ Vocoder: of this manual, JVC KENWOOD Corporation assumes no The AMBE+2™ voice coding technology is embedded in responsibility for errors or omissions. Neither is any liability the firmware under the license of Digital Voice Systems, Inc.
Page 3: System Set-Up
NX-300(G) SYSTEM SET-UP Frequency range (MHz) RF power Type DTMF keypad Merchandise received TX/RX 450~520 NX-300(G) K TX/RX 400~470 NX-300(G) K2 TX/RX 450~520 NX-300(G) K3 Choose the type of transceiver TX/RX 400~470 NX-300(G) K4 A personal computer, programming interface (KPG-36A/36U), and FPU (programming software) are required for programming.
Page 4 NX-300(G) REALIGNMENT 2. How to Enter Each Mode 5-2. Connection procedure 1. Connect the transceiver to the computer using the inter- Mode Operation face cable. User mode Power ON Note: Panel test mode [ ] + Power ON • You must install the KPG-36U driver in the computer to...
Page 5 NX-300(G) REALIGNMENT 7. Clone Mode 6-1. Preface Flash memory is mounted on the transceiver. This al- Programming data can be transferred from one transceiv- lows the transceiver to be upgraded when new features are er to another by connecting them via their external universal released in the future.
Page 6: Installation
NX-300(G) REALIGNMENT Cloning cable If you press the [ ] key after entering the password in this (E30-3325-05) procedure, “CLONE MODE” is displayed if the entered password is correct. If the password is incorrect, “CLONE LOCK” is redisplayed. 4. Power ON the target transceiver.
Page 7 NX-300(G) 3. Remove the coaxial cable from the GPS PCB. 6. Fold the fibrous sheet (G10-1362-04) in half, and cover Note: When you remove the coaxial cable from the GPS the terminal of the coaxial cable as shown in the figure.
Page 8: Disassembly For Repair
NX-300(G) Voice Guide & Storage Unit (VGS-1: Option) ■ Installing the VGS-1 1. Attach the flat spring (G02-1846-03) to the VGS-1 as VGS-1 shown in the figure. Note: Attach the flat spring so that its convex fits the PCB hol- low of the VGS-1.
Page 9 NX-300(G) DISASSEMBLY FOR REPAIR 2. Precautions for Disassembly ■ Removing the TX-RX unit from the chassis 1. Remove the cord ASSY from the connector of the TX-RX unit (CN900) a . 2. Remove the PTT FPC from the connector of the TX-RX unit (CN901) b .
Page 10 NX-300(G) DISASSEMBLY FOR REPAIR ■ Removing the lithium cell (W09-0971-05) ■ Forming the VOL/CH FPC, Cord ASSY and Uni- Insert a non-conductive screwdriver to groove of one side versal connector FPC of the socket (CN11, CN401) and pry the lithium cell up Form the VOL/CH FPC, Cord ASSY and Universal con- from the socket.
Page 11 NX-300(G) DISASSEMBLY FOR REPAIR ■ Changing the channel selector from 16-channel ■ Forming the GPS coaxial cable (E37-1718-05) operation to free Form the GPS coaxial cable as shown in the figure. 1. Remove the channel selector knob. 2. Remove the circular nut.
Page 12 Part Number Remark Sticker B42-7417-04 “NEXEDGE” is printed. Plastic Cabinet (6-key) A02-4002-23 Badge B43-1606-14 “KENWOOD” is printed. Plastic Cabinet (18-key) A02-4003-23 Fibrous Sheet (SP) G10-1373-04 Used for fixing the LCD ASSY on the Illumination Guide (LCD). LCD ASSY B38-0923-05 Adhesive Sheet (LCD)
Page 13: Circuit Description
CIRCUIT DESCRIPTION 1. Overview 2. Frequency Configuration The NX-300(G) is a UHF portable transceiver designed The receiver is a double-conversion superheterodyne us- to operate in the frequency range of 450 to 520MHz (K,K3) ing the first intermediate frequency (IF) of 58.05MHz and the or 400 to 470MHz (K2,K4).
Page 14 NX-300(G) CIRCUIT DESCRIPTION 3-3. Audio Amplifier Circuit 3-4. Squelch Circuit Audio processing (high-pass filter, low-pass filter, de- It amplifies the demodulated noise signal from IC108 emphasized and so on) at FM mode and decoding at NXDN after filtering through the BPF circuit. Then, the amplified sig- mode are processed by DSP.
Page 15 NX-300(G) CIRCUIT DESCRIPTION 4-3. VOX 4-5. APC Circuit IC716 (2/2) amplifies the audio signal captured in the mi- The APC circuit always monitors the current flowing crophone. The signal is then converted into the DC voltage, through the RF power amplifier (Q606) and keeps a constant rectified by D706.
Page 16 NX-300(G) CIRCUIT DESCRIPTION 5-3. PLL IC (IC502) The desired frequency is set for the PLL IC by the ASIC (IC108) through the 3-line “SDO1”, “SCK1”, “/PCS_RF” se- The PLL IC compares the differences in phases of the rial bus. Whether the PLL IC is locked or not is monitored by VCO oscillation frequency and the VCTCXO reference fre- the ASIC through the “PLD”...
Page 17 NX-300(G) CIRCUIT DESCRIPTION 6-2. Memory Circuit 6-6. DSP The memory circuit consists of the ASIC (IC108) and the The DSP circuit consists of a DSP (IC719) and process- SRAM(IC103) and flash memory (IC101). The flash memory es the base band signal. The DSP operates on an external has capacity of 32M-bit that contains the transceiver control clock of 18.432MHz (the same as the IC108), the I/O section...
Page 18 NX-300(G) CIRCUIT DESCRIPTION 8. Signaling Circuit TX-RX unit (XC1-013) F900 RF Final AMP 8-1. Encode (QT/DQT/LTR/DTMF/2-tone/MSK) 2.5A Each signaling data signal of QT, DQT, LTR, DTMF, IC902 /SAVE 2-tone and MSK is generated by the DSP circuit, super- Q905 posed on a modulation signal and output from IC108. The...
Page 19: Components Description
NX-300(G) COMPONENTS DESCRIPTION Control unit (XC1-0200-XX) Ref. No. Part Name Description Ref. No. Part Name Description Q103 12key backlight switch LCD contrast Q401,402 Level converter IC101 Flash memory Q403 Transistor SB2 switch IC103 SRAM Q404 SB2 switch control IC104 2 input AND gate...
Page 20 NX-300(G) COMPONENTS DESCRIPTION TX-RX unit (XC1-0130-XX) Ref. No. Part Name Description D506,507, Variable capaci- Ref. No. Part Name Description Frequency control D510,511 tance diode IC404 OP AMP (RSSI/VAGC) Variable capaci- D514~517 Frequency control IC500 Temperature sensor tance diode IC501 AF AMP for TCXO MOD...
Page 21: Parts List
E : Europe Les articles non mentionnes dans le Parts No. ne sont pas fournis. C : China X : Australia M : Other Areas Teile ohne Parts No. werden nicht geliefert. NX-300 (G) CONTROL UNIT (XC1-0020-XX) Desti- Desti- Ref. No. Address Parts No.
Page 22 NX-300(G) PARTS LIST CONTROL UNIT (XC1-0020-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation CC73HCH1H101J CHIP C 100PF C152 CK73HB1A104K CHIP C 0.10UF CK73HB1H102K CHIP C 1000PF K C153 CK73HB1A104K CHIP C 0.10UF...
Page 23 NX-300(G) PARTS LIST CONTROL UNIT (XC1-0020-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation C454 CK73GB1E105K CHIP C 1.0UF C750 CC73HCH1H470J CHIP C 47PF C455 CK73HB1H471K CHIP C 470PF C751 CK73GB1E105K CHIP C 1.0UF...
Page 24 NX-300(G) PARTS LIST CONTROL UNIT (XC1-0020-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation CN401 J19-5386-05 HOLDER (LITHIUM CELL) IC106 R2023T MOS-IC CN403 E40-6813-05 PIN ASSY IC107 SM5023CNDH-G MOS IC CN404 E40-6421-15...
Page 25 NX-300(G) PARTS LIST CONTROL UNIT (XC1-0020-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation L706 L92-0162-05 BEADS CORE RK73HB1J822J CHIP R 8.2K 1/16W L707 L92-0162-05 BEADS CORE RK73HB1J471J CHIP R 1/16W L708...
Page 26 NX-300(G) PARTS LIST CONTROL UNIT (XC1-0020-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R161 RK73HB1J000J CHIP R 1/16W R434 RK73HB1J393J CHIP R 1/16W R162 RK73HB1J474J CHIP R 470K 1/16W R435 RK73HB1J104J...
Page 27 NX-300(G) PARTS LIST CONTROL UNIT (XC1-0020-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R501 RK73HB1J222J CHIP R 2.2K 1/16W R713 RK73HB1J000J CHIP R 1/16W R502 RK73HB1J103J CHIP R 1/16W K,K3 R714...
Page 28 NX-300(G) PARTS LIST CONTROL UNIT (XC1-0020-XX) TX-RX UNIT (XC1-0130-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R782 RK73HB1J104J CHIP R 100K 1/16W R844 RK73HB1J472J CHIP R 4.7K 1/16W R783 RK73HB1J183J CHIP R...
Page 29 NX-300(G) PARTS LIST TX-RX UNIT (XC1-0130-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation C528 CC73HCH1H101J CHIP C 100PF C603 CC73HCH1H100B CHIP C 10PF K2,K4 C529 CC73HCH1H101J CHIP C 100PF K,K3 C604...
Page 30 NX-300(G) PARTS LIST TX-RX UNIT (XC1-0130-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation C668 CC73GCH1H080B CHIP C 8.0PF K2,K4 C747 CC73HCH1H100B CHIP C 10PF K2,K4 C668 CC73GCH1H100C CHIP C 10PF K2,K4...
Page 31 NX-300(G) PARTS LIST TX-RX UNIT (XC1-0130-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation C800 CC73HCH1H020B CHIP C 2.0PF K,K3 C935 CC73HCH1H470J CHIP C 47PF C800 CC73HCH1H1R5B CHIP C 1.5PF K2,K4 C936...
Page 32 NX-300(G) PARTS LIST TX-RX UNIT (XC1-0130-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation D506 1SV325F VARIABLE CAPACITANCE DIODE L517 L40-2285-92 SMALL FIXED INDUCTOR(220NH) D507 1SV325F VARIABLE CAPACITANCE DIODE L518 L40-2285-92 SMALL FIXED INDUCTOR(220NH)
Page 33 NX-300(G) PARTS LIST TX-RX UNIT (XC1-0130-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation L722 L41-1078-14 SMALL FIXED INDUCTOR(10NH) K2,K4 R515 RK73HB1J472J CHIP R 4.7K 1/16W L722 L41-8268-14 SMALL FIXED INDUCTOR(8.2NH) K,K3...
Page 34 NX-300(G) PARTS LIST TX-RX UNIT (XC1-0130-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R606 RK73HB1J331J CHIP R 1/16W R701 RK73HB1J561J CHIP R 1/16W R607 RK73HB1J222J CHIP R 2.2K 1/16W R702 RK73HB1J334J...
Page 35 NX-300(G) PARTS LIST TX-RX UNIT (XC1-0130-XX) SUB (GPS) UNIT (X58-5240-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R773 RK73HB1J824J CHIP R 820K 1/16W R933 RK73HB1J392J CHIP R 3.9K 1/16W R774 RK73HB1J104J...
Page 36 NX-300(G) MEMO...
Page 37: Exploded View
NX-300(G) EXPLODED VIEW Control unit (XC1-002) Sub (GPS) unit (X58) Hx10 TX-RX unit (XC1-013) : N08-0564-04 : N0Z-0001-00 C M2.6 x 8 : N09-2440-15 : N09-6549-04 E M2.6 x 4 : N09-6554-05 : N14-0844-04 H Ø2 x 5 : N83-2005-48...
Page 38: Packing
NX-300(G) PACKING 61 Belt clip (B09-0712-03) (J29-0730-05) 50 Packing (Cap) (G53-1769-04) F Pan head machine screw (N09-6585-15)x2 A Dressed screw (N08-0564-04) 53 Packing fixture (H12-4293-02) 54 Carton board (H13-2135-04) 13 Instruction manual 717 Pamphlet (B62-2608-00) 55 Item carton case (H52-2619-02)
Page 39: Trouble Shooting
NX-300(G) TROUBLE SHOOTING Fault Diagnosis of the BGA (Ball Grid Array) IC ■ Overview A flowchart for determining whether or not the transceiver can be powered on (the LCD does not function even if the power switch is turned on) due to broken BGA parts.
Page 40 NX-300(G) TROUBLE SHOOTING When a normal G Checking the output signal value is confirmed. from the ASIC When an abnormal value is confirmed. Points to be checked Normal voltage Remove R432. If the ASIC side is 0V, SBC R432 3.3V the ASIC/FLASH/SRAM may be broken.
Page 41 NX-300(G) TROUBLE SHOOTING Failure Diagnosis of the GPS section ■ Overview When the GPS function does not operate, use this flow chart to determine the problem. ■ Major parts for a GPS circuit (TX-RX unit and Sub (GPS) unit) • GPS IC (IC1/ SUB (GPS)) •...
Page 42 NX-300(G) TROUBLE SHOOTING When a normal condition is confirmed. When an abnormal When an abnormal condition is confirmed. condition is confirmed. Verify the GPS data (TXD). [The TXD1 line circuit is faulty] Verify the state of the TXD1 line. R10: High (3.3V) Replace any abnormal parts.
Page 43 The following data is written on the service unit: Data Type Description Firmware NX-200(G)/300(G) Firmware. FPU Data XC1-002 (NX-300(G)) K type data. The 0 resistor (R853) is mounted (PC programming mode) XC1-002 on the “R853” silk print part Component side...
Page 44: Adjustment
If changing to the original Kenwood ESN and NXDN ESN, please contact our service center. Note: A UPC code and UPC barcode is not printed on the Kenwood ESN Label. If necessary, cut the label at the cut-off line and attach only the serial number. ADJUSTMENT Controls ■...
Page 45 NX-300(G) ADJUSTMENT ■ Key operation • LED indicator Red LED Lights during transmission. “FNC” not appears on the sub LCD display Green LED Lights when there is carrier. Function Display • Sub LCD indicator [Selector] - “FNC” Appears at function on.
Page 46 NX-300(G) ADJUSTMENT • Analog mode signaling • LCD display in panel tuning mode CV voltage, AD value, etc None None Sub LCD display None 100Hz Square Wave CNTR Main LCD display LTR Data: LTR Data: AREA=0, GOTO=12 AREA=0, GOTO=12 HOME=12...
Page 47 NX-300(G) ADJUSTMENT ■ Adjustment item supplement Adjustment Item Description LCD contrast The contrast of LCD display can be changed. “Counterclockwise Volume” is adjusted at the minimum volume position. Counterclockwise Volume “Clockwise Volume” is adjusted at the maximum volume position. These adjustments can correct the volume variation.
Page 48 NX-300(G) ADJUSTMENT ■ Adjustment item and Display Aw (Analog An (Analog Nn (NXDN Nv (NXDN Adjusutment Main LCD Very Narrow) Adjust item Wide) Narrow) Narrow) Order Sub LCD display item display Number Adjustment range 1 point ADJ Common LCD contrast...
Page 49 NX-300(G) ADJUSTMENT Aw (Analog An (Analog Nn (NXDN Nv (NXDN Adjusutment Main LCD Very Narrow) Adjust item Wide) Narrow) Narrow) Order Sub LCD display item display Number Adjustment range (RSSI measurement Receive Sensitivity 2 SENS2 value) Section 3 1~256 - *1...
Page 50 ] press ] hold NX-300(G) Balance 5 reference level Narrow Adjustments ] press ] hold [Side2] NXDN Deviation NXDN Deviation Very ADJUSTMENT Narrow Narrow NDEV NDEV ] press ] hold 5 reference level Adjustments [Side2] Analog MAX Deviation Analog MAX Deviation...
Page 51 Li-ion High Capacity Battery: R1=1.8MΩ or Open In order to turn the volume nut and the channel selector Li-ion Normal Capacity Battery: R1=560kΩ nut, use a recommendation tool. KENWOOD part No.: W05-1123-00 Schematic diagram ■ Battery jig (W05-1370-00) –Terminal Connect the power cable properly between the battery...
Page 52 NX-300(G) ADJUSTMENT ■ Universal connector BLU (7) To transceiver PTT SW Use the interface cable (KPG-36A/36U) for PC tuning or the lead wire with plug (E30-3287-28) and screw (N08-0535- BRN (10) 08) for panel tuning. Connect the plug to the universal con- nector of the transceiver and tighten the screw.
Page 53 NX-300(G) ADJUSTMENT Radio Check Section Condition Measurement Adjustment Specifications / Item Test- Remarks Panel test mode PC test mode Unit Terminal Unit Parts Method equipment 1. Frequency 1) CH-Sig: 1-1 1) Test Channel f. counter Panel ANT Check an internal +0.05/+0.55ppm...
Page 54 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel test mode PC test mode Unit Terminal Unit Parts Method equipment 5. Sensitivity 1) CH-Sig: 1-1 1) Test Channel Check 12dB SINAD or check SSG output Channel: 1 AF VTVM...
Page 55 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 5. Receive 1) Adj item: [RAST] 1) Adj item: Panel [Panel The sub LCD 2.5V±0.1V Assist Adjust: [SSSS]...
Page 56 NX-300(G) ADJUSTMENT Transmitter Section Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 1. High 1) Adj item: [HIPWR] 1) Adj item: [High Power Panel ANT Panel [Panel 5.0W ±0.2W...
Page 57 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment Maximum 1) Adj item: [Nv NDEV] 1) Adj item: [Maximum Deviation Panel ANT Panel [Panel 1337Hz 1311~1363Hz Deviation...
Page 58 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 1) Adj item: [Aw QT] 1) Adj item: [QT Devia- Deviation Panel ANT Panel [Panel Write the value as 0.75kHz±0.05kHz...
Page 59 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 10. Single 1) Adj item: [An TONE] 1) Adj item: [Single Deviation Panel ANT Panel [Panel Write the value as 1.50kHz±0.05kHz...
Page 60 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 15. Battery 1) Adj item: [BATT] 1) Adj item:[Battery Power Panel ANT Press the PTT Warning Adjust: [SSS]...
Page 61 2. Increase the Adjustment value –90dBm (7.08μV) button to store the adjustment value (MOD: 1kHz/±1.5kHz) adjustment value. to seek “NX-300 Press [ ] key to store ADJ Point” of the adjustment value. RSSI level. (Refer to right.) 3) Adj item: [H SENS2]...
Page 62 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment (K2,K4) Sensitivity adjust 2. Sensitivity 1 1) Adj item: [SENS1] 1) Adj item: Panel ANT Panel [Panel Write the value as...
Page 63 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment RSSI 1) Adj item: [Nv RRSSI] 1) Adj item: [RSSI Ref- Panel ANT [Panel tuning mode] Adjust with the...
Page 64 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 6. Low RSSI 1) Adj item: [An LRSSI] 1) Adj item: [Low RSSI Panel ANT [Panel tuning mode] at –118dBm...
Page 65 NX-300(G) ADJUSTMENT Condition Measurement Adjustment Specifications / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment High RSSI 1) Adj item: [Aw HRSSI] 1) Adj item: [High Panel ANT [Panel tuning mode] at –80dBm...
Page 66: Terminal Function
NX-300(G) TERMINAL FUNCTION Control unit (XC1-0020-XX) Pin No. Name Function Pin No. Name Function Power output after passing through the fuse Chip select output Power input after power switch /RES LCD reset output CN404 Address bus 0 output LED_G Green LED control output...
Page 67 NX-300(G) TERMINAL FUNCTION Pin No. Name Function Pin No. Name Function Thermistor voltage input OPT2 PLL lock detect input 38M output RXEO Refer to “CN710 26-pin connector SCK1 PLL clock output RXEI specification” described on pages 70 to 73. S_DET...
Page 68 NX-300(G) TERMINAL FUNCTION Sub (GPS) unit (X58-5240-10) Pin No. Name Function Pin No. Name Function Side_G Key matrix input (SIDE1,2 key) CN10 Side_1 Key matrix output (SIDE1 key) W_/N No connection No connection No connection SDO1 PLL serial data input...
Page 69 NX-300(G) TERMINAL FUNCTION Universal Connector Rating and Condition Signal Pin No. Name I/O Function Type Parameter Unit EXT/INT speaker switch input Digital L: External speaker ON H: Internal speaker ON [8Ω load] Max output power (1kHz, Batt=7.5V) Analog BTL output + for external speaker [8Ω...
Page 70 NX-300(G) TERMINAL FUNCTION CN710 26-pin Connector Specification Rating and Condition Pin No. Name Signal Type Parameter Unit OPT1 [Input] VIH OPT4 [Input] VIL OPT5 Digital [Output] VOH OPT8 [Output] VOL OPT11 OPT3 [Input] VIH OPT7 [Input] VIL Digital OPT2 [Output] VOH...
Page 71 NX-300(G) TERMINAL FUNCTION Rating and Condition Pin No. Name Signal Type Parameter Unit Output Amplitude (1kHz, 60% deviation) mVp-p Coupling Capacitor μF RXEO Analog Ω Output Impedance 2.2k Allowable Frequency 3000 Input Amplitude (1kHz, 60% deviation) mVp-p Coupling Capacitor μF...
Page 72 NX-300(G) TERMINAL FUNCTION Pin No. Name Device Connection Function ANI board 26P_RD VGS-1 Serial data input Scrambler board Serial data input ANI board 26P_TD VGS-1 Serial data output Scrambler board Serial data output ANI board PTT signal output VGS-1 Enable...
Page 73 NX-300(G) TERMINAL FUNCTION Pin No. Name Device Connection Function ANI board Man-Down Man-Down output VGS-1 User programmable port OPT11 None: Hi-Z with Pull up Scrambler board [COR] L: Detect carrier [TOR] L: Detect signaling [LOK](Conventional) L: Transmitting [LOK](LTR) L: Link...
Page 74: Pc Board
NX-300(G) PC BOARD CONTROL UNIT (XC1-0020-XX) -10: K,K2 -11: K3,K4 Component side view (J79-0441-09) J79-0441-09 Ref. No. Address Ref. No. Address Ref. No. Address IC415...
Page 75 NX-300(G) PC BOARD CONTROL UNIT (XC1-0020-XX) -10: K,K2 -11: K3,K4 Component side view (J79-0441-09) CN22 R118 R116 CN23 /RES R406 C452 R500 CN24 Component side Layer 1 Layer 2 Layer 3 Layer 4 Layer 5 Layer 6 Foil side...
Page 76 NX-300(G) PC BOARD CONTROL UNIT (XC1-0020-XX) -10: K,K2 -11: K3,K4 Foil side view (J79-0441-09) R402 D409 L719 R472 R496 R101 R117 R114 R442 C429 Q405 L711 C822 L410 C115 R474 C120 R874 L712 C440 IC413 C167 C415 + L710 C109...
Page 77: Pc Board Control Unit (Xc1-0020-Xx)
NX-300(G) PC BOARD CONTROL UNIT (XC1-0020-XX) -10: K,K2 -11: K3,K4 Foil side view (J79-0441-09) R735 Q102 Q101 C712 R750 R101 R117 R114 R112 R745 IC707 C115 R106 R793 C717 C722 R829 R874 C767 R758 R755 R108 R753 C745 L710 C108...
Page 78: Tx-Rx Unit (Xc1-0130-Xx)
NX-300(G) PC BOARD TX-RX UNIT (XC1-0130-XX) -10: K,K3 -11: K2,K4 Component side view (J79-0431-19) C630 C646 C640 R648 R652 R651 R653 C641 R641 Q504 R654 Q607 R655 L503 C542 R538 Q608 C533 C653 R659 R660 R657 C987 C534 R566 R664...
Page 79 NX-300(G) PC BOARD TX-RX UNIT (XC1-0130-XX) -10: K,K3 -11: K2,K4 Component side view (J79-0431-19) C640 R648 R652 R651 R653 C641 C945 Side_G R654 Side_1 C971 C943 Side_2 C636 R655 C913 C976 R921 Q608 Q905 R922 C653 R659 R660 R657 C964...
Page 80 NX-300(G) PC BOARD TX-RX UNIT (XC1-0130-XX) -10: K,K3 -11: K2,K4 Foil side view (J79-0431-19) L610 C988 L614 C609 C668 C665 CN601 L886 L612 C663 CN600 C662 C664 D709 C954 C803 R915 C952 L725 R931 R800 R790 C850 C809 R791 C811...
Page 81 NX-300(G) PC BOARD TX-RX UNIT (XC1-0130-XX) -10: K,K3 -11: K2,K4 Foil side view (J79-0431-19) C645 C643 L610 R575 C648 L514 C642 C556 C988 C557 R646 C632 L516 L515 C635 C547 L517 C545 D517 R559 D515 L509 C566 Q606 L518 L519...
Page 82: Sub (Gps) Unit (X58-5240-10)
NX-300(G) PC BOARD SUB (GPS) UNIT (X58-5240-10) Component side view (J79-0432-09) J79-0432-09 SUB (GPS) UNIT (X58-5240-10) Foil side view (J79-0432-09) J79-0432-09 CN10 CN11 BATTERY +SIDE UP OPT5 Ref. No. Address Ref. No. Address...
Page 83: Level Diagram
NX-300(G) LEVEL DIAGRAM...
Page 84: Interconnection Diagram
NX-300(G) INTERCONNECTION DIAGRAM POWER SW/ SWITCH UNIT AF VOL SELECTOR X41-384 6KEY/SP/MIC CN403 CN23 /RES CONTROL UNIT XC1-002 CN701 CN710 CN405 CN10 UNIVERSAL CONNECTOR SUB (GPS) UNIT X58-524...
Page 85 NX-300(G) INTERCONNECTION DIAGRAM SWITCH UNIT X41-384 6KEY/SP/MIC CORD ASSY CN404 CN900 X42-351 LED_G LED_G /EMG /EMG LED_R LED_R /SAVE /SAVE I2CCK I2CCK /5TC /5TC I2CSDA I2CSDA /T_R /T_R ASSIST ASSIST SWITCH UNIT VAGC VAGC X41-383 TCXO_MOD TCXO_MOD PGND CN401 RSSI...
Page 86 NX-300(G) MEMO...
Page 87: Schematic Diagram
NX-300(G) SCHEMATIC DIAGRAM SUB (GPS) UNIT (X58-5240-10) CN10 A V R I C 4 I C 1 B U 3 1 T D 3 W G W 0 2 - 3 7 6 8 - 0 5 V I N...
Page 88 NX-300(G) SCHEMATIC DIAGRAM TX-RX UNIT : (XC1-0130-XX) R590 10k R589 10k CN900 SWITCH UNIT LED_G (X41-3830-10) LED_G CN901 C904 47p R928 /EMG /PTT C905 47p Side_G LED_R Side_G LED_R SIDE 1 Side_1 C906 47p Side_1 TX/RX LED TX/RX LED Side_2...
Page 89 NX-300(G) SCHEMATIC DIAGRAM XC1-0130-XX D510 D514 D515 L520 L521 L528 R533 R552 R559 R561 R583 R955 R956 R957 K,K3 1SV282-F 1SV282-F 1SV282-F 180k 120k K2,K4 1SV290B-F 1SV290B-F 1SV290B-F 220k 100k XC1-0130-XX R958 C516 C529 C537 C543 C545 C547 C553 C557...
Page 90 NX-300(G) SCHEMATIC DIAGRAM XC1-0130-XX CN601 D608 L602 L603 L605 L615 L902 R619 R620 R621 R623 R624 R626 R658 R669 R710 C613 C621 C623 C671 C672 C702 C704 C715 C716 C813 C814 470p K,K3 1SS400 6.8n 1.8k 0.01u K2,K4 E23-1167-05 TX-RX UNIT (XC1-0130-XX)
Page 91 NX-300(G) SCHEMATIC DIAGRAM XC1-0130-XX L709 L710 L711 L713 L714 L715 L720 L721 L722 L725 L726 L887 R644 R749 R757 R759 R760 R771 R785 R788 R790 R800 R885 R950 R954 C609 C639 C647 C660 C662 C663 C664 K,K3 8.2n 8.2n 8.2n 8.2n...
Page 92: Block Diagram
NX-300(G) BLOCK DIAGRAM Control unit (XC1-0020-XX) X102 18.432MHz SM5023CNDH-G IC107 TCXO PCK DSP/PCS DSP PLL MOD IC101 IC103 Flash SRAM IC719 Memory /DRST,DCLK,/SYMTIM,/RSSITIM, /DINT,/SWUP,FSDET,/HINT IC401 TC74LCX245FK MCD1AF,/MCSCKAF,/MCCSAF,MCD0AF,MCD1CN, BUS SW IC402 TC7WZ245FK-F /MCCXCN,/MCD0CN,/MCCSRCN,MCSCKCN D0~15,A0~20,/RD,/WR,/CS0,/CS2,/CS3,/CS4/HDS2,/HRDY /LCDRST TXD0 RXD0 IC703 RTS0 M62364FP-F(7/8) CTS0...
Page 93 NX-300(G) BLOCK DIAGRAM IC404 L401 , D406 , D405 XC6204B332D-G IC407 LT1616ES6-PBF DC DC Converter IC717 D408 Q402 SSM6N16FE-F XC9235A15CM-G 1SS301F DC DC DC SW /PSW Q408 IC414 Q401 SSM6N16FE-F EMD12 XC61CC5602N-G IC406 RESET /BINT XC6204B332M-G IC416 S-812C31BPI-G DC SW...
Page 94 NX-300(G) BLOCK DIAGRAM TX-RX unit (XC1-0130-XX) Q507 2SC5383-T111 CN900 I2CCK Ripple I2CSDA Filter IC500 Q510 EM6M2 /T_R LM73CIMKX-0 Q511 2SJ347F Temp. Q512 Q600 Sensor IC502 2SC5636 2SC5636 Loop BUFF BUFF TCXO Filter PLL MOD X500 19.2MHz Q504 Q508,509 2SK508NV(K52) 2SK879-F(Y)
Page 95 NX-300(G) BLOCK DIAGRAM TX/RX: 450~520MHz (K,K3) 400~470MHz (K2,K4) D606,607 Q600 D600,601 Q601 Q602 Q603 Q606 D709,711 2SC5636 HSC277x2 2SC5636 2SK3077F RD01MUS1-T113 RD07MVS1BT122 RN262CSx4 Pre- BUFF Drive Final Drive Q610 EMD5 Q604 DC SW DC SW /APCSW 2SC5383-T111 /DSW IC600 TA75W01FUF...
Page 96: Optional Accessories
NX-300(G) OPTIONAL ACCESSORIES KNB-47L (Li-ion Battery Pack) KNB-48L (Li-ion Battery Pack) ■ External View ■ External View ■ Specifications ■ Specifications Voltage ................7.4V Voltage ................7.4V Battery capacity ............1950mAh Battery capacity ............2550mAh KRA-44G (UHF Helical Antenna) ■ External View...
Page 97 NX-300(G) MEMO...
Page 98: Specifications
Hot Start: < 10 seconds Horizontal Accuracy ......... < 10 meters Analog measurements made per TIA/EIA 603 and specifications shown are typical. JVC KENWOOD Corporation reserves the right to change specifications without prior notice or obligation. JVC KENWOOD Corporation Communications Equipment BU...
Page 99 XC1-0130-XX D510 D514 D515 L520 L521 L528 R533 R552 R559 R561 R583 R955 R956 R957 XC1-0130-XX CN601 D608 L602 L603 L605 L615 L902 R619 R620 R621 R623 R624 R626 R658 R669 R710 C613 C621 C623 C671 C672 C702 C704 C715 C716 C813 C814...
Page 100 NX-300(G) NX-300(G) PC BOARD PC BOARD CONTROL UNIT (XC1-0020-XX) -10: K,K2 -11: K3,K4 CONTROL UNIT (XC1-0020-XX) -10: K,K2 -11: K3,K4 Component side view (J79-0441-09) Component side view (J79-0441-09) CN22 R118 R116 CN23 /RES R406 C452 R500 CN24 J79-0441-09 Component side Ref.
Page 101 NX-300(G) NX-300(G) PC BOARD PC BOARD CONTROL UNIT (XC1-0020-XX) -10: K,K2 -11: K3,K4 CONTROL UNIT (XC1-0020-XX) -10: K,K2 -11: K3,K4 Foil side view (J79-0441-09) Foil side view (J79-0441-09) R402 R735 D409 L719 R472 Q102 Q101 C712 R750 R496 R101 R117...
Page 102 NX-300(G) NX-300(G) PC BOARD PC BOARD TX-RX UNIT (XC1-0130-XX) -10: K,K3 -11: K2,K4 TX-RX UNIT (XC1-0130-XX) -10: K,K3 -11: K2,K4 Component side view (J79-0431-19) Component side view (J79-0431-19) C630 C646 C640 R648 R652 R651 R653 C641 R641 C945 Side_G Q504...
Page 103 NX-300(G) NX-300(G) PC BOARD PC BOARD TX-RX UNIT (XC1-0130-XX) -10: K,K3 -11: K2,K4 TX-RX UNIT (XC1-0130-XX) -10: K,K3 -11: K2,K4 Foil side view (J79-0431-19) Foil side view (J79-0431-19) C645 C643 L610 R575 C648 L514 C642 C556 C988 C557 R646 C632...
Page 104 NX-300(G) PC BOARD SUB (GPS) UNIT (X58-5240-10) Component side view (J79-0432-09) J79-0432-09 SUB (GPS) UNIT (X58-5240-10) Foil side view (J79-0432-09) J79-0432-09 CN10 CN11 BATTERY +SIDE UP OPT5 Ref. No. Address Ref. No. Address...
Page 105 X102 IC404 L401 , D406 , D405 18.432MHz SM5023CNDH-G XC6204B332D-G IC407 LT1616ES6-PBF IC107 DC DC TCXO Converter PCK DSP/PCS DSP PLL MOD IC101 IC103 IC717 D408 Q402 SSM6N16FE-F XC9235A15CM-G 1SS301F Flash SRAM IC719 DC DC DC SW Memory /PSW Q408 IC414 Q401 SSM6N16FE-F EMD12...
Page 106 Q507 TX/RX: 450~520MHz (K,K3) 2SC5383-T111 CN900 I2CCK 400~470MHz (K2,K4) Ripple I2CSDA Filter IC500 Q510 EM6M2 /T_R D606,607 LM73CIMKX-0 Q511 2SJ347F Q512 Temp. Q600 D600,601 Q601 Q602 Q603 Q606 D709,711 Sensor IC502 2SC5636 2SC5636 HSC277x2 2SC5636 2SK3077F RD01MUS1-T113 RD07MVS1BT122 RN262CSx4 Pre- Loop BUFF BUFF...
Page 107 POWER SW/ SWITCH UNIT AF VOL SELECTOR X41-384 6KEY/SP/MIC CORD ASSY CN403 CN23 CN404 CN900 X42-351 LED_G LED_G /EMG /EMG LED_R LED_R /SAVE /SAVE I2CCK I2CCK /5TC /5TC I2CSDA I2CSDA /T_R /T_R ASSIST ASSIST SWITCH UNIT VAGC VAGC X41-383 /RES TCXO_MOD TCXO_MOD PGND...
Page 108: Appendix (Schematic Diagram Xc1-002)
NX-300(G) APPENDIX (SCHEMATIC DIAGRAM XC1-002) CONTROL UNIT (XC1-0020-XX) 3.824V VOLTAGE REGULATOR(33M) I C 4 0 4 X C 6 2 0 4 B 3 3 2 D - G D416 D405,D406 4 N C 2 33M CONTROL D412 CN402 V o U T...

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