PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-152

This product complies with the RoHS directive for the European market.

B5B-7268-00

SERVICE MANUAL

This product uses Lead Free solder.

No.RA054<Rev.001>

2017/6

Summary of Contents for Kenwood NX-3720HG

Page 1: Table Of Contents
NX-3720H(G), NX-3720H, NX-3720(G), NX-3720, NX-3820H(G), NX-3820H, NX-3820(G), NX-3820 COPYRIGHT © 2017 JVC KENWOOD Corporation TABLE OF CONTENTS PRECAUTION............... . . 1-7 SPECIFIC SERVICE INSTRUCTIONS .
Page 2 Neither is any liability assumed for damages resulting from the use of the information contained herein. JVC KENWOOD Corporation reserves the right to make changes to any products herein at any time for improvement purposes. Firmware Copyrights The title to and ownership of copyrights for firmware embedded in KENWOOD product memories are reserved for JVC KENWOOD Corporation.
Page 3 *1 25 and 30 kHz are not included in the models sold in the USA or US territories. Analog measurements made per TIA603. Specifications are measured according to applicable standards. JVC KENWOOD Corporation reserves the right to change specifications without prior notice or obligation. (No.RA054<Rev.001>)1-3...
Page 4 16K0F3E, 14K0F2D, 14K0F3E, 12K0F2D, 8K50F3E, 7K50F2D, 8K30F1E, 8K30F1D, 8K30F7W, 4K00F1E, 4K00F1D, 4K00F7W, 7K60FXE, 7K60FXD, 4K00F2D Analog measurements made per TIA603. Specifications are measured according to applicable standards. JVC KENWOOD Corporation reserves the right to change specifications without prior notice or obligation. 1-4 (No.RA054<Rev.001>)
Page 5 *1 25 kHz are not included in the models sold in the USA or US territories. Analog measurements made per TIA603. Specifications are measured according to applicable standards. JVC KENWOOD Corporation reserves the right to change specifications without prior notice or obligation. (No.RA054<Rev.001>)1-5...
Page 6 16K0F3E, 14K0F2D, 14K0F3E, 12K0F2D, 8K50F3E, 7K50F2D, 8K30F1E, 8K30F1D, 8K30F7W, 4K00F1E, 4K00F1D, 4K00F7W, 7K60FXE, 7K60FXD, 4K00F2D Analog measurements made per TIA603. Specifications are measured according to applicable standards. JVC KENWOOD Corporation reserves the right to change specifications without prior notice or obligation. 1-6 (No.RA054<Rev.001>)
Page 7: Precaution
SECTION 1 PRECAUTION This service manual does not describe PRECAUTION. SECTION 2 SPECIFIC SERVICE INSTRUCTIONS SYSTEM SET-UP Merchandise received Type Frequency range (MHz) RF power GPS antenna NX-3720H(G) K TX/RX 136~174 NX-3720H K TX/RX 136~174 Choose the type of transceiver NX-3720(G) E TX/RX 136~174 NX-3720 E...
Page 8 REALIGNMENT 2.2.2 How to Enter Each Mode 2.2.1 Modes Mode Operation User mode Power ON User mode Panel test mode*2 • [ ] + Power ON Panel tuning mode Panel test mode • [ ] + Power ON Select the “Panel Test” using the [] / [] button.
Page 9 (KPG-46U/46X). (Connection is same as in the PC mode.) 2.2.6.3 Programming (1) Start up the firmware programming software (KENWOOD Firmware Loader). The KFL.exe exists in the KPG-D3/D3N installed folder. (2) Set the baud rate to "auto" or 1152000, 576000, 115200, and 57600.
Page 10 2.2.7 Clone Mode (7) The other target can be continuously cloned. When the Programming data can be transferred from one transceiver to ] button on the source is pressed while the source another by connecting them via their modular microphone jacks. displays “END”, the source displays “CLONE MODE”.
Page 11 2.2.8.2 Data Writing Setup item Display Remarks Before moving to next Zone/Channel, “Keep This Change?” 6 RX Signaling RX QT/DQT Receive QT/DQT appears on the LCD, if you select “OK”, the new data is written to memory. If you select “Cancel”, the new data not be written; 7 TX Signaling TX QT/DQT Transmit QT/DQT...
Page 12 Button RX Signaling TX Signaling RX RAN TX RAN Color Code Slot Transmit Channel Name \Item Selection Power Decision Decision Decision Decision Decision Decision Decision Decision Back to the Back to the Back to the Back to the Back to the Back to the Back to the Back to the...
Page 13 • Front panel programming mode flow chart Input Password Clone/Front Panel Password Enter the Front panel programming mode by using section "2.2.2 How to Enter Each Mode". Front panel Programming mode ] or [ ] or [ ] or [ Transmit Power Medium High...
Page 14 2.2.9 Transceiver Information Mode Use this function to confirm the transceiver firmware version, Encryption Library Version. (1) Enter the Transceiver Information mode by using section "2.2.2 How to Enter Each Mode". (2) The transceiver firmware version appears on the LCD. (3) Use the [] and [] buttons to select the confirmation items.
Page 15 2.3.3 Ignition Sense Cable (KCT-18: Option) 2.3.5.2 Change FNC1 (TXD), FNC2 (RXD), FNC3 (RTS) and The KCT-18 is an optional cable for enabling the ignition FNC4 (CTS) of D-SUB 15-pin connector from TTL function. The ignition function lets you turn the transceiver power level to RS-232C level on and off with the car ignition button.
Page 16 CIRCUIT DESCRIPTION 2.4.1 Overview The NX-3720H/3720 is a VHF Analog FM & Digital Mobile transceiver designed to operate in the frequency range of 136 to 174MHz. The NX-3820H/3820 is a UHF Analog FM & Digital Mobile transceiver designed to operate in the frequency range of 450 to 520MHz (K) or 400 to 470MHz (K2, E).
Page 17 2.4.4 Transmitter System 2.4.4.1 Audio Band Circuit The signal from microphone is amplified and converted to digital signal by IC607. IC607 includes AGC function. Digital signal is transferred to IC404. 2.4.4.2 Baseband Circuit The audio signal transferred from IC607 is processed at IC404.Voice signals of 300Hz or lower and frequencies of 3 kHz or higher are cut off and an audio range 300Hz to 3 kHz is extracted.
Page 18 2.4.5.2 • NX-3720H (K), NX-3720 (E) There is one VCO contain TX VCO and RX VCO. The VCO (Q105) generates the carrier for the transmitter and the receiver. VCO oscillation frequency range is 272 to 348MHz. The transmit frequency range is same as receiver frequency range. The local signal frequency range is also 272 to 348MHz.
Page 19 Flash memory Note: The flash memory stores the data that is written by the FPU (KPG-D3/D3N), tuning data (Deviation, Squelch, etc.), and firmware program (User mode, Test mode, Tuning mode, etc.). This data must be rewritten when replacing the flash memory. Mobile DDR (static memory) Note: Mobile DDR is used as a work area of the MPU.
Page 20 RF Power Module Q15,Q16,D13 IC13 31BU Power management IC 5V Reg 3.1V AVR IC15 12BU MPU/DSP RTC 1.2V AVR BackUp Battery MPU/DSP Core IC25 IC24 5.4V DC/DC 1.2V DC/DC MPU/DSP PLL [BAT_CNT] from Power management IC (IC22) MPU/DSP I/O(B),DDR IC12 Mobile DDR2,Sub unit 1.8V DC/DC...
Page 21 2.4.8 Signaling Circuit 2.4.8.1 Encode (QT/DQT/DTMF/2-tone /MSK) Each signaling data signal of QT, DQT, DTMF, 2-tone and MSK is generated by IC404, superposed on a modulation signal and output to VCO and PLL. 2.4.8.2 Decode (QT/DQT/DTMF/2-tone/MSK) The audio signal and signaling data (QT, DQT, DTMF, 2-tone and MSK) are separated by IC404. Next IC404 decode the signaling data.
Page 22 2.4.9.1 Bluetooth Circuit TX/RX frequency is 2400-2483.5MHz (79ch Hopping, 2402-2480MHz, 1MHz step). Transmitting power is +2dBm at Bluetooth antenna input. Using the printed antenna with Bluetooth, and connected to the Bluetooth/GPS IC (IC5) through the saw filter (L11). Frequency configuration for Bluetooth is following: There are two LO modes: 2X and Offset LO (OSLO).
Page 23 COMPONENTS DESCRIPTION Ref. No. Part Name Use / Function 2.5.1 TX-RX unit (XC1-182K-00,XC1-183K-XX) DC switch (SB2) Ref. No. Part Name Use / Function Transistor DC switch Voltage regulator (90C) DC switch IC12 DC/DC converter (18M) DC switch (90T) IC13 Voltage regulator (31BU) Transistor DC switch IC14...
Page 24 2.5.3 Module(BT/GPS) unit (XC2-0040-10) Ref. No. Part Name Use / Function Ref. No. Part Name Use / Function D205-209 Diode Antenna switch Level conversion D301-304 Diode Excessive input protection Voltage regulator (18BT) D401 Diode Reverse current prevention Voltage regulator (33BT) D402-406 Diode Line protection...
Page 25 Pin No. Name Function Pin No. Name Function - MIC ground CTS2 I Serial data input /PTT I PTT input G_RXD2 I Serial data input I/O MIC data detection G_TXD2 O Serial data output /PSW I Detection signal input of power BT_SW O Enable signal for 33BT and 18BT switch...
Page 26 Pin No. Name Function Pin No. Name Function BLC/D+ I/O Back light control signal / USB PHY data plus - Ground R_SET0 O Radio setting signal 0 - Ground R_SET1 O Radio setting signal 1 I Switch 8 R_SET2 O Radio setting signal 2 I Switch 9 - Ground I Switch 10...
Page 27 Pin No. Name Function O Switched power supply O Switched power supply O Switched power supply O Switched power supply - No connection - Ground - Ground - Ground - Ground - No connection I Speaker input I Speaker input I Speaker input - No connection - Ground...
Page 28 Rating and Condition Signal Pin Name I/O Modification Description Type Parameter Unit FNC1 I/O Yes Digital Programmable I/O COM1_TXD -0.5 VOH(Io=-1.5mA) VOL(Io=1.5mA) Digital RS-232C Serial port Voltage Swing ±5 ±5.2 (RS-232C) (TXD) Baud Rate 300k FNC2 I/O Yes Digital Programmable I/O COM1_RXD -0.5 VOH(Io=-1.5mA)
Page 29 Rating and Condition Signal Pin Name I/O Modification Description Type Parameter Unit O Yes Analog Horn alert signal output Output Voltage This parameter depends on HR1 Voltage Output Voltage Loss Output Current COM2_RXD Digital -0.5 - No Ground (No.RA054<Rev.001>)1-29...
Page 30: Disassembly
SECTION 3 DISASSEMBLY Disassembly Procedure (3) Disconnect the flat cable from connector of the panel assembly. (1) Remove the cabinet, top packing and shielding plate of the transceiver. Cabinet Flat cable (4) Remove the speaker lead from the holder hook.<1> Remove the speaker connector from the display unit connector.<2>...
Page 31 (5) When removing the TX-RX PCB, then remove the solder of Precautions for Reassembly the antenna hot pin and positive terminal of the DC cord. (1) Push the upper tabs of speaker holder (stamped mark <1> Remove the 15 screws from the TX-RX PCB, power side) into the front panel first.
Page 32 TX-RX UNIT (NX-3820 E) XCA-034E-01 MODULE UNIT XC2-0040-10 SHIELDING COVER F10-3225-05 ILL.GUIDE B1B-0101-00 OPTI.DIFFUSER B1B-0102-00 MOUNTING J2B-0341-00 FLEX P.BOARD J8C-0018-00 PANEL ASSY A6C-0067-00 KENWOOD BADGE B4D-0044-00 CAUTION STICKER B4B-0008-00 SHIELDING CASE F10-3112-13 CONDUCTIVE CUSHION G13-2101-14 SUB UNIT XC3-050M-00 REF.SHEET B1B-0103-00 1-32 (No.RA054<Rev.001>)
Page 33: Adjustment
SECTION 4 ADJUSTMENT NX-3720H(G)/3720H 4.2.2 Button operation K TYPE Controls Button "Func" not appears on the sub LCD display Function Display Power switch Volume Up/Down button Channel Up/Down button Push: Volume up Hold: Volume up continuously Push: Volume down Hold: Volume down continuously [] Push: Test channel up...
Page 34 • LED indicator Button "Func" appears on the sub LCD display Red LED Lights during transmission. Function Display Green LED Lights when there is carrier. • Sub LCD indicator External Speaker on/ icon appears "Func" Appears at function on. (AUX)] Compander on/off On: [ ] icon appears [PTT]...
Page 35 NXDN Type Signaling 4.3.2 Button operation Button Function RAN1 RAN1 Push Hold (1 second) None Volume up Continuation up RAN1 Maximum Deviation Volume down Continuation down Pattern [  ] Adjustment value up Continuation up FSW + PN9 FSW + PN9 [ ...
Page 36 VCO Assist Adjustment Item Description Tuning point Display RX (MHz) TX (MHz) QT Deviation QT deviation is adjusted. 136.05000 136.10000 DQT Deviation DQT deviation is adjusted. 140.80000 140.85000 LTR Deviation LTR deviation is adjusted. 145.55000 145.60000 DTMF Deviation DTMF deviation is adjusted. 150.30000 150.35000 Single Tone...
Page 37 4.3.5 Adjustment item and Display Order Adjusutment Main Sub LCD AS *2 Adjust item display (Analog (Analog (Analog (NXDN (NXDN Very (DMR) item display Wide) Wide 4k) Narrow) Narrow) Narrow) Number Adjustment range LCD Contrast CNTR 1 point ADJ Common Section 2 1~256 VCO Assist...
Page 38 Order Adjusutment Main Sub LCD AS *2 Adjust item display (Analog (Analog (Analog (NXDN (NXDN Very (DMR) item display Wide) Wide 4k) Narrow) Narrow) Narrow) Number Adjustment range RSSI Reference 2 RSSI2 (RSSI RF IC(Receive) Receive RF IC(Receive) measurement value) Section 3 1~256 RSSI Reference 3...
Page 39 4.3.6 Panel tuning mode flow chart Note: * In this Panel tuning mode flow chart, the Adjustment item name is modified. Panel Test Mode Adjustment Item N/W/VN Adjustment Point LCD Display LCD Display ]hold For all adjustment items, press the [ ] button LCD Contrast to write the adjustment value.
Page 40 Adjustment point TX-RX UNIT (XC1-182) Component Side RTC (CN55) Test Equipment Required for Alignment Test Equipment Major Specifications 1. Standard Signal Frequency Range 100 to 900MHz Generator (SSG) Modulation Frequency modulation and external modulation Output -127dBm/0.1uV to greater than -20dBm/22.4mV When performing the Frequency adjustment, the following accuracy is necessary.
Page 41 Test cable for microphone input (E30-3360-28) MIC connector (Front panel view) GREEN 1 : BLC 2 : +B 3 : GND BLACK 4 : PTT/TXD (PC serial data from radio) 5 : MICE BLUE 6 : MIC SHIELD MIC-E 7 : HOOK/RXD (PC serial data to radio) WHITE 8 : DM GRAY...
Page 42 Item Condition Measurement Adjustment Specifications /Remarks Panel test PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)CH-Sig: 1-1 1)Test Channel Power meter Panel ANT Check 25W~35W Medium PTT: ON Channel: 1 Ammeter 10A or less power TA: OFF Test Signaling check Type: Analog...
Page 43 Item Condition Measurement Adjustment Specifications /Remarks Panel test PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)CH-Sig: 1-1 1)Test Channel Panel ANT Check 12dB SINAD Sensitivity SSG output Channel: 1 AF VM Ext. SP or more check Wide: Test Signaling Oscilloscope...
Page 44 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment *The 1) Adj item: Panel ANT [Panel [PC test mode] [PC test mode] Frequency Frequency [Frequency] tuning Press [Start] button of “IF20”...
Page 45 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: [High Power Panel ANT Panel [Panel ±1W High [H_PWR] Transmit Power] meter tuning 13A or less Transmit Adjust:[****] 2) Adj item:...
Page 46 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)Adj item: 1) Adj item: Power Panel ANT Panel [Panel [PC test mode] Ramp [RAMP] [Ramp Offset] meter tuning [Automatic Offset Adjust:[****] Press Ammeter...
Page 47 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 4150~4250Hz Maximum [Aw ADEV] [Maxmum meter tuning each adjustment point.
Page 48 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 8. NXDN 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 2995~3117Hz High [Nn NDEV] [NXDN High meter tuning...
Page 49 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Deviation Write fixed value for 2695~2803Hz DMR High [D DDEV] [DMR High meter each adjustment point. Deviation Adjust: [****] Deviation (DMR...
Page 50 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 11. DQT 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.75kHz±0.05 Deviation [Aw DQT] [DQT Deviation meter tuning...
Page 51 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.75kHz±0.05 Narrow] [An LTR] [LTR Deviation meter tuning followings.
Page 52 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 14. Single 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 3.00kHz±0.05 Tone [Aw TONE] [Single Tone meter tuning...
Page 53 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.50kHz±0.05 Narrow] [An MSK] [MSK Deviation meter tuning followings.
Page 54 4.8.1 Necessary Deviation adjustment item for each signaling and mode The following shows the necessary adjustment items for each signaling deviation. Please read the following table like the following example. In the case of the signaling "QT (Analog Wide)", this signaling is composed of three elements [Balance, Maximum Deviation (Analog Wide) and QT Deviation (Analog Wide)].
Page 55 Receiver Section Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Panel test mode] 1) Test Channel Panel ANT Panel [Panel Volume Up/Down 1.41V AF level 1) CH-Sig: 1-1 Channel: 1 Ext.
Page 56 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [DSP 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] (Standby)] [An RSSI 3] [RSSI Reference Distortion Ext.
Page 57 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Analog 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Narrow] [An SQL] [Squelch Open Distortion Ext. SP After input signal from Adjust:[****] (Analog Narrow)]...
Page 58 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [DMR] 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] [D SQL] [Squelch Open Distortion Ext. SP After input signal from Adjust:[****] (DMR)]...
Page 59 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Low RSSI [An LRSSI] [Low RSSI (Analog Ext. SP After input signal from Adjust:[****] Narrow)]...
Page 60 4.10 NX-3720(G)/3720 4.11.2 Button operation E TYPE Controls Button "Func" not appears on the sub LCD display Function Display Power switch Volume Up/Down button Channel Up/Down button Push: Volume up Hold: Volume up continuously Push: Volume down Hold: Volume down continuously [] Push: Test channel up...
Page 61 • LED indicator Button "Func" appears on the sub LCD display Red LED Lights during transmission. Function Display Green LED Lights when there is carrier. • Sub LCD indicator (AUX)] Compander on/off On: [ ] icon appears "Func" Appears at function on. [PTT] Transmit [0] to [9]...
Page 62 NXDN Type Signaling 4.12.2 Button operation Button Function RAN1 RAN1 Push Hold (1 second) None Volume up Continuation up RAN1 Maximum Deviation Volume down Continuation down Pattern [  ] Adjustment value up Continuation up FSW + PN9 FSW + PN9 [ ...
Page 63 VCO Assist Adjustment Item Description Tuning point Display RX (MHz) TX (MHz) QT Deviation QT deviation is adjusted. 136.05000 136.10000 DQT Deviation DQT deviation is adjusted. 140.80000 140.85000 LTR Deviation LTR deviation is adjusted. 145.55000 145.60000 DTMF Deviation DTMF deviation is adjusted. 150.30000 150.35000 Single Tone...
Page 64 4.12.5 Adjustment item and Display Order Adjusutment Main Sub LCD Adjust item display (Analog (Analog (Analog (NXDN (NXDN Very (DMR) item display Wide 5k) Wide 4k) Narrow) Narrow) Narrow) Number Adjustment range LCD Contrast CNTR 1 point ADJ Common Section 2 1~256 VCO Assist (CV voltage)
Page 65 Order Adjusutment Main Sub LCD Adjust item display (Analog (Analog (Analog (NXDN (NXDN Very (DMR) item display Wide 5k) Wide 4k) Narrow) Narrow) Narrow) Number Adjustment range RSSI Reference 2 RSSI2 (RSSI RF IC(Receive) Receive RF IC(Receive) measurement value) Section 3 1~256 RSSI Reference 3 RSSI3...
Page 66 4.12.6 Panel tuning mode flow chart Note: * In this Panel tuning mode flow chart, the Adjustment item name is modified. Panel Test Mode Adjustment Item N/W/VN Adjustment Point LCD Display LCD Display ]hold For all adjustment items, press the [ ] button LCD Contrast to write the adjustment value.
Page 67 4.13 Adjustment points TX-RX UNIT (XC1-182) Component Side RTC (CN55) 4.14 Test Equipment Required for Alignment Test Equipment Major Specifications 1. Standard Signal Frequency Range 100 to 900MHz Generator (SSG) Modulation Frequency modulation and external modulation Output -127dBm/0.1uV to greater than -20dBm/22.4mV When performing the Frequency adjustment, the following accuracy is necessary.
Page 68 Test cable for microphone input (E30-3360-28) MIC connector (Front panel view) GREEN 1 : BLC 2 : +B 3 : GND BLACK 4 : PTT/TXD (PC serial data from radio) 5 : MICE BLUE 6 : MIC SHIELD MIC-E 7 : HOOK/RXD (PC serial data to radio) WHITE 8 : DM GRAY...
Page 69 Item Condition Measurement Adjustment Specifications /Remarks Panel test PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)CH-Sig: 1-1 1)Test Channel Power meter Panel ANT Check 3.5W~6.5W PTT: ON Channel: 1 Ammeter 7.0A or less power TA: OFF Test Signaling check Type: Analog...
Page 70 4.16 Common Section Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) DC voltage:13.2V Setting 2) SSG standard modulation [Wide 5k] MOD:1kHz,DEV:3kHz [Wide 4k] MOD:1kHz,DEV:2.4kHz [Narrow] MOD:1kHz,DEV:1.5kHz 2.LCD 1) Adj item 1) Adj item Panel [Panel Write the value as...
Page 71 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment *The 1) Adj item: Panel ANT [Panel [PC test mode] [PC test mode] Frequency Frequency [Frequency] tuning Press [Start] button of “IF20”...
Page 72 4.17 Transmitter Section Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Power Panel ANT Panel [Panel 57.5W ±2.5W Maximum [MAX_P] [Maximum meter tuning 15A or less Transmit Adjust:[****]...
Page 73 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)Adj item: 1) Adj item: Power Panel ANT Panel [Panel [PC test mode] Ramp [RAMP] [Ramp Offset] meter tuning [Automatic Offset Adjust:[****] Press Ammeter...
Page 74 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 4150~4250Hz Maximum [Aw ADEV] [Maxmum meter tuning each adjustment point.
Page 75 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 7. NXDN 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 2995~3117Hz High [Nn NDEV] [NXDN High meter tuning...
Page 76 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Deviation Write fixed value for 2695~2803Hz [D DDEV] [DMR High meter each adjustment point. High Adjust: [****] Deviation (DMR Oscilloscope...
Page 77 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.35kHz±0.05 Narrow] [An QT] [QT Deviation meter tuning followings.
Page 78 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.35kHz±0.05 Narrow] [An DQT] [DQT Deviation meter tuning followings.
Page 79 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.75kHz±0.05 Narrow] [An LTR] [LTR Deviation meter tuning followings.
Page 80 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.25kHz±0.05 Narrow] [An DTMF] [DTMF Deviation meter tuning followings.
Page 81 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.50kHz±0.05 Narrow] [An TONE] [Single Tone meter tuning followings.
Page 82 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.50kHz±0.05 Narrow] [An MSK] [MSK Deviation meter tuning followings.
Page 83 4.17.1 Necessary Deviation adjustment item for each signaling and mode The following shows the necessary adjustment items for each signaling deviation. Please read the following table like the following example. In the case of the signaling "QT (Analog Wide 5k)", this signaling is composed of three elements [Balance, Maximum Deviation (Analog Wide 5k) and QT Deviation (Analog Wide 5k)].
Page 84 4.18 Receiver Section Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Panel test mode] 1) Test Channel Panel ANT Panel [Panel Volume Up/Down 1.41V AF level 1) CH-Sig: 1-1 Channel: 1 Ext.
Page 85 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [DSP 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] (Standby)] [An RSSI 3] [RSSI Reference Distortion Ext.
Page 86 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Analog 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Wide 4k] [As SQL] [Squelch Open Distortion Ext.
Page 87 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [NXDN 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Very [Nv SQL] [Squelch Open Distortion Ext. SP After input signal from Narrow] Adjust:[****]...
Page 88 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Analog 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Wide 4k] [As SQLT] [Squelch Tight Distortion Ext.
Page 89 4.19 NX-3820H(G)/3820H 4.20.2 Button operation K,K2 TYPE Controls Button "Func" not appears on the sub LCD display Function Display Power switch Volume Up/Down button Channel Up/Down button Push: Volume up Hold: Volume up continuously Push: Volume down Hold: Volume down continuously [] Push: Test channel up...
Page 90 • LED indicator Button "Func" appears on the sub LCD display Red LED Lights during transmission. Function Display Green LED Lights when there is carrier. • Sub LCD indicator [0] to [9] Function off "Func" Appears at function on. [#], [ ] •...
Page 91 NXDN Type Signaling 4.21.2 Button operation Button Function RAN1 RAN1 Push Hold (1 second) None Volume up Continuation up RAN1 Maximum Deviation Volume down Continuation down Pattern [  ] Adjustment value up Continuation up FSW + PN9 FSW + PN9 [ ...
Page 92 4.21.3 5, 9 or 17 reference level adjustments frequency Maximum Transmit Power, High Transmit Power, Medium Transmit Power, Low Transmit Power, IQ Phase, RSSI Reference, Squelch Open, Squelch Tight, Low RSSI, High RSSI Tuning point Display RX (MHz) TX (MHz) RX (MHz) TX (MHz) 450.050000...
Page 93 4.21.4 Adjustment item supplement Adjustment Item Description Adjustment Item Description IQ Phase Correction of phase difference shift LCD Contrast The contrast of LCD display can be between I and Q. changed. RSSI Reference The minimum RSSI level for scan stop is VCO Assist The lock voltage of VCO is adjusted.
Page 94 4.21.5 Adjustment item and Display Order Adjusutment Main Sub LCD AS *2 Adjust item display (Analog (Analog (Analog (NXDN (NXDN Very (DMR) item display Wide) Wide 4k) Narrow) Narrow) Narrow) Number Adjustment range LCD Contrast CNTR 1 point ADJ Common Section 2 1~256 VCO Assist...
Page 95 Order Adjusutment Main Sub LCD AS *2 Adjust item display (Analog (Analog (Analog (NXDN (NXDN Very (DMR) item display Wide) Wide 4k) Narrow) Narrow) Narrow) Number Adjustment range RSSI Reference 2 RSSI2 (RSSI RF IC(Receive) Receive RF IC(Receive) measurement value) Section 3 1~256 RSSI Reference 3...
Page 96 4.21.6 Panel tuning mode flow chart Note: * In this Panel tuning mode flow chart, the Adjustment item name is modified. Panel Test Mode Adjustment Item N/W/VN Adjustment Point LCD Display LCD Display ]hold For all adjustment items, press the [ ] button LCD Contrast to write the adjustment value.
Page 97 4.22 Adjustment points TX-RX UNIT (XC1-183) Component Side RTC (CN55) 4.23 Test Equipment Required for Alignment Test Equipment Major Specifications 1. Standard Signal Frequency Range 100 to 900MHz Generator (SSG) Modulation Frequency modulation and external modulation Output -127dBm/0.1uV to greater than -20dBm/22.4mV When performing the Frequency adjustment, the following accuracy is necessary.
Page 98 Test cable for microphone input (E30-3360-28) MIC connector (Front panel view) GREEN 1 : MBL 2 : +B 3 : GND BLACK 4 : PTT/TXD (PC serial data from radio) 5 : MICE BLUE 6 : MIC SHIELD MIC-E 7 : HOOK/RXD (PC serial data to radio) WHITE 8 : DM GRAY...
Page 99 Item Condition Measurement Adjustment Specifications /Remarks Panel test PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)CH-Sig: 1-1 1)Test Channel Power meter Panel ANT Check 25W~35W Medium PTT: ON Channel: 1 Ammeter 10A or less power TA: OFF Test Signaling check Type: Analog...
Page 100 Item Condition Measurement Adjustment Specifications /Remarks Panel test PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)CH-Sig: 1-1 1)Test Channel Panel ANT Check 12dB SINAD Sensitivity SSG output Channel: 1 AF VM Ext. SP or more check Wide: Test Signaling Oscilloscope...
Page 101 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment *The 1) Adj item: Panel ANT [Panel [PC test mode] [PC test mode] Frequency Frequency [Frequency] tuning Press [Start] button of “IF20”...
Page 102 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: [High Power Panel ANT Panel [Panel ±1W High [H_PWR] Transmit Power] meter tuning 13A or less Transmit Adjust:[****] 2) Adj item:...
Page 103 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)Adj item: 1) Adj item: Power Panel ANT Panel [Panel [PC test mode] Ramp [RAMP] [Ramp Offset] meter tuning [Automatic Offset Adjust:[****] Press Ammeter...
Page 104 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 4150~4250Hz Maximum [Aw ADEV] [Maxmum meter tuning each adjustment point.
Page 105 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 8. NXDN 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 2995~3117Hz High [Nn NDEV] [NXDN High meter tuning...
Page 106 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 2695~2803Hz DMR High [D DDEV] [DMR High meter tuning each adjustment point.
Page 107 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.35kHz±0.05 Narrow] [An QT] [QT Deviation meter tuning followings.
Page 108 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.35kHz±0.05 Narrow] [An DQT] [DQT Deviation meter tuning followings.
Page 109 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.75kHz±0.05 Narrow] [An LTR] [LTR Deviation meter tuning followings.
Page 110 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.25kHz±0.05 Narrow] [An DTMF] [DTMF Deviation meter tuning followings.
Page 111 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.50kHz±0.05 Narrow] [An TONE] [Single Tone meter tuning followings.
Page 112 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.50kHz±0.05 Narrow] [An MSK] [MSK Deviation meter tuning followings.
Page 113 4.26.1 Necessary Deviation adjustment item for each signaling and mode The following shows the necessary adjustment items for each signaling deviation. Please read the following table like the following example. In the case of the signaling "QT (Analog Wide)", this signaling is composed of three elements [Balance, Maximum Deviation (Analog Wide) and QT Deviation (Analog Wide)].
Page 114 4.27 Receiver Section Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Panel test mode] 1) Test Channel Panel ANT Panel [Panel Volume Up/Down 1.41V AF level 1) CH-Sig: 1-1 Channel: 1 Ext.
Page 115 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [DSP 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] (Standby)] [An RSSI 3] [RSSI Reference Distortion Ext.
Page 116 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Analog 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Narrow] [An SQL] [Squelch Open Distortion Ext. SP After input signal from Adjust:[****] (Analog Narrow)]...
Page 117 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [DMR] 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] [D SQL] [Squelch Open Distortion Ext. SP After input signal from Adjust:[****] (DMR)]...
Page 118 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Low RSSI [An LRSSI] [Low RSSI (Analog Ext. SP After input signal from Adjust:[****] Narrow)]...
Page 119 4.28 NX-3820(G)/3820 4.29.2 Button operation E TYPE Controls Button "Func" not appears on the sub LCD display Function Display Power switch Volume Up/Down button Channel Up/Down button Push: Volume up Hold: Volume up continuously Push: Volume down Hold: Volume down continuously [] Push: Test channel up...
Page 120 • LED indicator Button "Func" appears on the sub LCD display Red LED Lights during transmission. Function Display Green LED Lights when there is carrier. • Sub LCD indicator (AUX)] Compander on/off On: [ ] icon appears "Func" Appears at function on. [PTT] Transmit [0] to [9]...
Page 121 NXDN Type Signaling 4.30.2 Button operation Button Function RAN1 RAN1 Push Hold (1 second) None Volume up Continuation up RAN1 Maximum Deviation Volume down Continuation down Pattern [  ] Adjustment value up Continuation up FSW + PN9 FSW + PN9 [ ...
Page 122 Tuning point Display RX (MHz) TX (MHz) Adjustment Item Description 452.55000 452.60000 Ramp Offset Adjust this item to the optimal Ramp voltage. 461.35000 461.40000 Balance The transmit modulation frequency 469.95000 469.90000 response is adjusted. VCO Assist This item is adjusted so that the deviation of 2kHz becomes the same deviation of Tuning point Display...
Page 123 4.30.5 Adjustment item and Display Order Adjusutment Main Sub LCD Adjust item display (Analog (Analog (Analog (NXDN (NXDN Very (DMR) item display Wide 5k) Wide 4k) Narrow) Narrow) Narrow) Number Adjustment range LCD Contrast CNTR 1 point ADJ Common Section 2 1~256 VCO Assist (CV voltage)
Page 124 Order Adjusutment Main Sub LCD Adjust item display (Analog (Analog (Analog (NXDN (NXDN Very (DMR) item display Wide 5k) Wide 4k) Narrow) Narrow) Narrow) Number Adjustment range RSSI Reference 2 RSSI2 (RSSI RF IC(Receive) Receive RF IC(Receive) measurement value) Section 3 1~256 RSSI Reference 3 RSSI3...
Page 125 4.30.6 Panel tuning mode flow chart Note: * In this Panel tuning mode flow chart, the Adjustment item name is modified. Panel Test Mode Adjustment Item N/W/VN Adjustment Point LCD Display LCD Display ]hold For all adjustment items, press the [ ] button LCD Contrast to write the adjustment value.
Page 126 4.31 Adjustment points TX-RX UNIT (XC1-183) Component Side RTC (CN55) 4.32 Test Equipment Required for Alignment Test Equipment Major Specifications 1. Standard Signal Frequency Range 100 to 900MHz Generator (SSG) Modulation Frequency modulation and external modulation Output -127dBm/0.1uV to greater than -20dBm/22.4mV When performing the Frequency adjustment, the following accuracy is necessary.
Page 127 Test cable for microphone input (E30-3360-28) MIC connector (Front panel view) GREEN 1 : BLC 2 : +B 3 : GND BLACK 4 : PTT/TXD (PC serial data from radio) 5 : MICE BLUE 6 : MIC SHIELD MIC-E 7 : HOOK/RXD (PC serial data to radio) WHITE 8 : DM GRAY...
Page 128 Item Condition Measurement Adjustment Specifications /Remarks Panel test PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)CH-Sig: 1-1 1)Test Channel Power meter Panel ANT Check 3.5W~6.5W PTT: ON Channel: 1 Ammeter 7.0A or less power TA: OFF Test Signaling check Mode: Analog...
Page 129 4.34 Common Section Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) DC voltage:13.2V Setting 2) SSG standard modulation [Wide 5k] MOD:1kHz,DEV:3kHz [Wide 4k] MOD:1kHz,DEV:2.4kHz [Narrow] MOD:1kHz,DEV:1.5kHz 2.LCD 1) Adj item 1) Adj item Panel [Panel Write the value as...
Page 130 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment *The 1) Adj item: Panel ANT [Panel [PC test mode] [PC test mode] Frequency Frequency [Frequency] tuning Press [Start] button of “IF20”...
Page 131 4.35 Transmitter Section Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Power Panel ANT Panel [Panel 57.5W ±2.5W Maximum [MAX_P] [Maximum meter tuning 15A or less Transmit Adjust:[****]...
Page 132 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1)Adj item: 1) Adj item: Power Panel ANT Panel [Panel [PC test mode] Ramp [RAMP] [Ramp Offset] meter tuning [Automatic Offset Adjust:[****] Press Ammeter...
Page 133 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 4150~4250Hz Maximum [Aw ADEV] [Maxmum meter tuning each adjustment point.
Page 134 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 2050~2150Hz Narrow] [An ADEV] [Maxmum meter tuning each adjustment point.
Page 135 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [NXDN 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write fixed value for 1311~1363Hz Very [Nv NDEV] [NXDN High meter tuning each adjustment point.
Page 136 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 9. QT 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.75kHz±0.05 Deviation [Aw QT] [QT Deviation meter tuning...
Page 137 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.35kHz±0.05 Narrow] [An QT] [QT Deviation meter tuning followings.
Page 138 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.60kHz±0.05 Wide 4k] [As DQT] [DQT Deviation meter tuning...
Page 139 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 11. LTR 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.00kHz±0.05 Deviation [Aw LTR] [LTR Deviation meter tuning...
Page 140 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 0.75kHz±0.05 Narrow] [An LTR] [LTR Deviation meter tuning followings.
Page 141 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 2.00kHz±0.05 Wide 4k] [As DTMF] [DTMF Deviation meter tuning...
Page 142 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 13. Single 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 3.00kHz±0.05 Tone [Aw TONE] [Single Tone meter tuning...
Page 143 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.50kHz±0.05 Narrow] [An TONE] [Single Tone meter tuning followings.
Page 144 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment [Analog 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 2.40kHz±0.05 Wide 4k] [As MSK] [MSK Deviation meter tuning...
Page 145 Item Condition Measurement Adjustment Specifications /Remarks Panel tuning PC test mode Test- Unit Terminal Unit Parts Method mode equipment 1) Adj item: 1) Adj item: Deviation Panel ANT Panel [Panel Write the value as 1.10kHz±0.10 CWID [An CWID] [CWID Deviation meter tuning followings.
Page 146 4.35.1 Necessary Deviation adjustment item for each signaling and mode The following shows the necessary adjustment items for each signaling deviation. Please read the following table like the following example. In the case of the signaling "QT (Analog Wide 5k)", this signaling is composed of three elements [Balance, Maximum Deviation (Analog Wide 5k) and QT Deviation (Analog Wide 5k)].
Page 147 4.36 Receiver Section Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Panel test mode] 1) Test Channel Panel ANT Panel [Panel Volume Up/Down 1.41V AF level 1) CH-Sig: 1-1 Channel: 1 Ext.
Page 148 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [DSP 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] (Standby)] [An RSSI 3] [RSSI Reference Distortion Ext.
Page 149 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Analog 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Wide 4k] [As SQL] [Squelch Open Distortion Ext.
Page 150 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [NXDN 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Very [Nv SQL] [Squelch Open Distortion Ext. SP After input signal from Narrow] Adjust:[****]...
Page 151 Item Condition Measurement Adjustment Specifica tions Panel tuning PC test mode Test- Unit Terminal Unit Parts Method /Remarks mode equipment [Analog 1) Adj item: 1) Adj item: Panel ANT Panel [Panel tuning mode] Wide 4k] [As SQLT] [Squelch Tight Distortion Ext.
Page 152: Troubleshooting
SECTION 5 TROUBLESHOOTING 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. BGA parts MPU/DSP(IC404), mobile DDR(IC402), Flash Memory(IC401) When the BGA IC is problematic, please bring the printed circuit board (XCA-033K-00/XCA-033E-01/XCA-034K-00/XCA-034K-01/...
Page 153 Checking the output signal Pass from the MPU/DSP. Checking the control signal output from the MPU/DSP If the /FRST is always 0V, the MPU/DSP is broken. Normal voltage Points to be checked Remove D401 to check the voltage of Flash memory Fail /FRST side R433.
Page 154 If 12M, 18M or 32M has still an abnormal voltage after the implementation of each procedure above, 54M(IC25),12M(IC24),18M(IC12),32M(IC20) or one of these peripheral circuit is broken. 54M(normally 5.4V at L13) has an abnormal voltage, check the MSP430(IC22) according to the following procedure. Checking the operation of the MSP430 When VIN of 54M Check that the voltage of VIN of 54M(IC25 - 8pin)
Page 155 Checking the operation of MSP430 (/PSW and /IGN) Check that the signal /PSW(IC22 - 10pin) and /PSW_OUT(IC22 - 15pin) are linked with the power button on KCH-19 in power on state. Check that the signal /PSW and /PSW_OUT are 0V MSP430 is broken.
Page 156 Failure diagnosis of the GPS section (GPS model only) Overview: When the GPS function does not operate, use this flowchart to determine the problem. Major parts for a GPS circuit • GPS active antenna: KRA-40 (option) • Coaxial cable: E0E-0003-00 IC404 GPS Antenna unit Level...
Page 157 Check the BT/GPS UNIT PCB side A. Pass Verify the BT/GPS power [The BT/GPS power supply Fail Fail Check the BT/GPS UNIT supply. line 33BT circuit is faulty] PCB side B (a). Verify the PCB side A parts. (33BT) L4: 3.3V L4, C15, C19, C20, C33 Pass Replace any abnormal parts.
Page 158 Pass Verify the BT/GPS control Verify the BT/GPS control Fail Fail signal Check the TX-RX UNIT signal (/BT_SHUTDOWN). (BTFM_nSHUTDoWN). CN1 (14pin): 3.3V IC1 (5pin): 1.8V Pass Pass [/BT_SHUTDOWN line circuit is faulty] Verify the IC1, R7 Replace any abnormal parts. Verify the BT/GPS control signal (18BT_RX).
Page 159 Check the PCB side B (a). Pass Fail [The BT/GPS power supply line 33BT circuit is [The BT/GPS IC is faulty] abnormal] Verify the PCB side B parts. Replace the PCB. C5, C46, C44, C49 Replace any abnormal parts. Check the PCB side B (b). Pass Fail [The BT/GPS power supply line 18BT circuit is...
Page 160 Check the TX-RX UNIT PCB Pass Verify the BT/GPS control Verify the BT/GPS control Fail Fail [The MPU/DSP IC or signal (TXD2). signal CN2 (15pin): Square CP405 (3pin): unchangeable part is waveform UART data of 3.3V Square waveform UART data abnormal] logic.
Page 161 Failure diagnosis of the Bluetooth section Overview: When the Bluetooth function does not operate, use this flowchart to determine the problem. TX-RX Unit BT/GPS Unit Major parts for a Bluetooth circuit IC404 • Bluetooth antenna (Pattern Antenna) UART UART UART Level conversion Bluetooth...
Page 162 Pass Verify the reference clock for [The reference clock circuit the BT/GPS. for the BT/GPS is faulty] Fail (BT_CLK) Intersection of C8 Verify the R9, Q1, R10, R26, and C9: Sine waveform, R12, R13, X1, C4, C8, C9 19.2MHz, 0.2 to 1.2 Vp-p Replace any abnormal parts.
Page 163 Pass Verify the BT/GPS control Verify the BT/GPS control Fail Fail Check the TX-RX UNIT signal (RXD2). signal (18BT_HCI_TX). CN1 (7pin): Square IC6 (8pin): PCB. waveform UART data of 3.3V Square waveform UART data logic. of 1.8V logic. Baud rate: Pass Default: 115.2kbps After: 3.967Mbps.
Page 164 Check the TX-RX UNIT PCB Pass Verify the BT/GPS control Verify the BT/GPS control Fail signal (TXD2). signal (G_TXD2). Fail [The MPU/DSP IC is CN735 (15pin): Square CP705 (3pin): abnormal] waveform UART data of 3.2V Square waveform UART data Replace the TX-RX PCB. logic.
Page 165 NX-3720, NX-3720H Model name: [XCA-033] NX-3720H(G)/3720H XC1-182K-00 XCA-033K-00 NX-3720S (K, E) Type:K, E NX-3720(G)/3720 XC1-182K-00 XCA-033E-01 The same number as the KENWOOD ESN label is written. NX-3820H(G)/3820H XC1-183K-00 XCA-034K-00 NX-3820, NX-3820H Model name: [XCA-034] NX-3820S (K, K2, E) NX-3820H(G)/3820H XC1-183K-01...
Page 166 Note: • When a new printed circuit board is used, the KENWOOD • When using the ESN Validation function of NXDN ESN changes, as does the Transceiver Information Trunking, the NXDN ESN number changes when the display of the KPG-D3/D3N, but this does not have any circuit board is changed (the number is written on the effect on the operation of the transceiver.
Page 167 Operating Method of Enforced Firmware Overwriting Mode Enforced firmware overwriting mode is a mode to forcibly overwrite the transceiver firmware when the operations as instructed in Section 2.2.2 "How to Enter Each Mode" does not allow the transceiver to enter the firmware programming mode, for instance, when the transceiver fails to start up due to the transceiver failure.
Page 168 (4) Upon startup of FLDM loader, "FIRMWARE PROG" appears on an LCD screen. (5) Start KFL up, select the desired firmware you wish to overwrite, select the COM port number and baud rate, and then click the "Write" button. Note: Configuring "Auto"...
Page 169 PRECAUTIONS ON SCHEMATIC DIAGRAMS * Due to the improvement in performance, some part numbers shown in the circuit diagrams may not agree with those indicated in the Parts List. * The parts numbers, values and rated voltage etc. in the Schematic Diagrams are for reference only.
Page 170 PRINTED CIRCUIT BOARD TX-RX UNIT (XC1-182K-00 (NX-3720H(G), NX-3720H, NX-3720(G), NX-3720)) --- Component side view (J7C-0192-00) --- C630 R651 R643 D617 R627 R628 R650 CN20 CN88 R613 CN97 R634 R625 R659 CN96 CN95 C279 R633 R631 R630 R623 C249 C247 IC201 L219 L220 R242...
Page 171 TX-RX UNIT (XC1-182K-00 (NX-3720H(G), NX-3720H, NX-3720(G), NX-3720)) --- Foil side view (J7C-0192-00) --- C613 R629 Q602 D618 D616 C209 C268 C635 C278 D610 R642 C267 IC605 TH202 R616 R617 C664 IC609 D605 D606 C663 C264 D604 D608 IC606 C277 C612 D614 C208 C265...
Page 172 A-1C ADDRESS TABLE OF BOARD PARTS Side Y axis Each address may have an address error by one X axis interval. REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION Q204 B- 2B D609...
Page 173 TX-RX UNIT (XC1-183K-00 (NX-3820H(G), NX-3820H, NX-3820(G), NX-3820)) --- Component side view (J7C-0193-00) --- C630 R651 R643 D617 R627 R628 R650 CN20 CN88 R613 R634 R625 R659 CN96 CN95 CN97 R633 R631 R630 R623 C249 C247 IC201 L219 L220 R242 C232 L221 CN26 R239...
Page 174 TX-RX UNIT (XC1-183K-00 (NX-3820H(G), NX-3820H, NX-3820(G), NX-3820)) --- Foil side view (J7C-0193-00) --- C613 R629 Q602 D618 D616 C268 C635 D610 R642 C267 IC605 R616 R617 C664 TH202 IC609 D605 D606 C663 C264 D604 D608 IC606 C612 D614 C265 C255 D204 C254 R262...
Page 175 A-1C ADDRESS TABLE OF BOARD PARTS Side Y axis Each address may have an address error by one X axis interval. REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION Q204 B- 2B D610...
Page 176 SUB UNIT (XC3-050M-00) --- Component side view (J7C-0194-00) --- ADDRESS TABLE OF BOARD PARTS Each address may have an address error by one interval. A-1C Side Y axis X axis REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION A- 4A B- 3B B- 1B A- 1B A- 3A...
Page 177 MODULE (BT/GPS) UNIT (XC2-0040-10 (NX-3720H(G), NX-3720(G), NX-3820H(G), NX-3820(G))) --- Component side view (J7C-0037-10) --- --- Foil side view (J7C-0037-10) --- XC2-003/004 J7C-0037 A-1C ADDRESS TABLE OF BOARD PARTS Y axis Side Each address may have an address error by one interval. X axis REF.NO.
Page 178 INTERCONNECTION DIAGRAM IC201 IC601 AF AMP RF POWER MODULE INT SP FCN1 FCN6 NC(IGN) NC(IGN) FCN2 ESD_GND 50AC FCN3 FCN4 VDDI DETO FCN5 RSTB DATAI SUB UNIT TX-RX UNIT USB_D+ USB_D+ XC1-182(VHF) USB_D- USB_D- XC3-050 XC1-183(UHF) MIC/VBUS MIC/VBUS /PTT /PTT DM/KVL DM/KVL /PSW...
Page 179 LEVEL DIAGRAM NX-3720/3720H Receiver Section RF (Center Frequency) AF (1kHz) -107.5dBm -120dBm -121dBm -121.5dBm -122.5dBm 141mVrms 72.1mVrms 77.4mVrms C311 IC607 D205 D206 IC404 C262 D207 C337 C306 IC302 C655 IC412 C661 IC608 C627 IC601 Transceiver IC MPU/DSP CODEC C145 -5dBm~+5dBm To make measurements in the AF section, connect the AC level meter.
Page 180 NX-3820/3820H Receiver Section RF (Center Frequency) AF (1kHz) -107.5dBm -120dBm -121dBm -121.5dBm 141mVrms 72.1mVrms 77.4mVrms C311 D205 IC607 D206 C262 D207 C337 C306 IC302 IC404 C655 IC412 C661 IC608 C627 IC601 Transceiver IC MPU/DSP CODEC C145 -5dBm~+5dBm To make measurements in the AF section, connect the AC level meter. (ANT input: –53dBm, 1kHz FM, 3kHz DEV (Wide).
Page 181 SCHEMATIC DIAGRAM SUB UNIT (XC3-050M-00) E41-2671-05 LCD BACKLIGHT $C60 B30-2364-05 EC710AM-0560A NSSW206C-T865 NSSW206C-T865 RGB LED GND(SPG) EC720AK-0512A GND(SPG) GND(SPG) LB73H0AV-003 NSSW206C-T865 NSSW206C-T865 100p 100p LCDBLC1 Q3,Q4,Q6 100p SSM6N37FE LTC014EEBFS8 100p LCDBLC2 100p LED_B I2CDT 100p 2.2k 100p I2CCK 2.2k ESD_GND VSS_1 100p KEY ILLUMINATION...
Page 182 MODULE (BT/GPS) UNIT (XC2-0040-10 (NX-3720H(G), NX-3720(G), NX-3820H(G), NX-3820(G))) BT ANT MODULE UNIT (BT/GPS) (XC2-004) LEVEL CONVERTER 1.8V 1.8V F10-3226-05 1.80V 18BT_TX 18BT_HCI_RX 18BT_RX 18BT_HCI_TX 74AVC4TD245GU VOLTAGE VOLTAGE REGULATOR(18BT) REGULATOR(33BT) DIR4 DIR1 3.31V 0.1u VCC(A) EM6M2 VCC(B) 0.1u 19.2MHz DIR3 DIR2 VCoNT VCC 4 DC SW...
Page 183 SCHEMATIC DIAGRAM TX-RX UNIT (XC1-182K-00 (NX-3720H(G), NX-3720H, NX-3720(G), NX-3720)) THP1 IC201 RA60H1317A501 Destination CN26 CN27 C258 L224 560n R207 1000p LR79Z0GJR56G C279 6.0p C280 2.0p C93-1852-05 C93-1838-05 $R11 $R13 $R15 Pre-Drive D205 Drive L8104 IC202 R240 R269 BGU6104 C250 1000p L34-4903-05 L34-4903-05 L34-4903-05...
Page 184 TX-RX UNIT (XC1-183K-00 (NX-3820H(G), NX-3820H, NX-3820(G), NX-3820)) *IC201 THP1 F1:RA60H4452-501 F2:RA60H3847-501 Destination K-00 (F1:450-520) K-01 CN26 CN27 *C253 (F2:400-470) L224 $R11 $R13 $R15 C258 LR79G0GK82NG $R207 Pre-Drive 470p Drive D205 $R12 $R14 $R16 IC202 *R269 C274 R240 BGU6104 L8104 Tripler C238 C241 C250...
Page 185 BLOCK DIAGRAM TX-RX UNIT (NX-3720H(G), NX-3720H, NX-3720(G), NX-3720) TX-RX Unit (XC1-182) IC404 IC402 DDR_A[0]~DDR_A[13] DDR_BA[0],DDR_BA[1] DDR_CAS,DDR_CKE,DDR_CLKN DDR_CLKP,DDR_CS DDR_DQM[0],DDR_DQM[1] DDR_RAS,DDR_WE --------------------------------------------------------- DDR_DQS[0],DDR_DQS[1] --TX-- DDR_D[0]~DDR_D[15] ANTSW,/DSW,TXC,ASSW,TXPWR_H_/L IC401 --------------------------------------------------------- --RX-- ATT_SW --------------------------------------------------------- /FRST,/OE,/WP,/WR --AUDIO-- ADD[0]~ADD[23] FLASH VCO_MOD 18M_3 SP_MUTE,PA_MUTE DATA[0]~DATA[15] D108 Q105 --------------------------------------------------------- SMV1130-079LF MCH3914-H/8/ --3.2V Reg(IC19),5V Reg(IC609),DC SW(Q13,Q12)--...
Page 186 TX-RX UNIT (NX-3820H(G), NX-3820H, NX-3820(G), NX-3820) TX-RX Unit (XC1-183) IC404 IC402 DDR_A[0]~DDR_A[13] DDR_BA[0],DDR_BA[1] DDR_CAS,DDR_CKE,DDR_CLKN DDR_CLKP,DDR_CS DDR_DQM[0],DDR_DQM[1] DDR_RAS,DDR_WE --------------------------------------------------------- DDR_DQS[0],DDR_DQS[1] --TX-- DDR_D[0]~DDR_D[15] ANTSW,/DSW,TXC,ASSW,TXPWR_H_/L IC401 --------------------------------------------------------- --RX-- ATT_SW --------------------------------------------------------- /FRST,/OE,/WP,/WR --AUDIO-- K :450~520MHz FLASH ADD[0]~ADD[23] VCO_MOD 18M_3 SP_MUTE,PA_MUTE DATA[0]~DATA[15] D108 Q105 K2,E:400~470MHz --------------------------------------------------------- SMV1130-079LF MCH3914-H/8/...
Page 187 SUB UNIT Sub (Display) Unit (XC3-050) To SPEAKER TC35894FG I2CCK,I2CDT,/KEYINT S1~S10 KEYBLC LCDBLC1 D3-D6,D11,D12, D17,D18,D33,D34 EXPANDER LCDBLC2 D9,D10,D15,D16 B30-2365-05 /PSW NSSW206C-T865 LED_B ILLUMINATION LED_G BACKLIGHT B30-2364-05 LED_R RGB LED BUSSW BLCSW /TXDEN ESD_GND LED_B LED_R LCD_GND SSM3K15AMFV /PSW LED_G LCDBLC1 LCDBLC2 KEYBLC RSTB...
Page 188 MEMO (No.RA054<Rev.001>) 2-20...
Page 189 PARTS LIST [NX-3720H(G), NX-3720H, NX-3720(G), NX-3720, NX-3820H(G), NX-3820H, NX-3820(G), NX-3820] * SAFETY PRECAUTION Parts identified by the symbol are critical for safety. Replace only with specified part numbers. * BEWARE OF BOGUS PARTS Parts that do not meet specifications may cause trouble in regard to safety and performance.
Page 190 Exploded view of general assembly and parts list Block No.M1MM SUB UNIT<03> (GPS type) TX-RX UNIT<01><02> (W/O GPS type) (K,K2 type) MODULE UNIT<04> (E type) 3-2(No.RA054<Rev.001>)
Page 191 General assembly Block No. [M][1][M][M]  Symbol No. Part No. Part Name Description Local A0C-0166-00 PLASTIC CABINET A6C-0067-10 PANEL ASSY B4D-0044-00 KENWOOD BADGE PANEL B09-0732-03 DSUB B1B-0101-00 ILL.GUIDE B1B-0102-00 OPTI.DIFFUSER UPPER ILL-GUIDE B1B-0103-00 REF.SHEET LOWER ILL-GUIDE B3H-0058-00 LCD ASSY 304X100 DOT E04-0454-15 C.RECEPTACLE-BN...
Page 192 Electrical parts list TX-RX UNIT  Symbol No. Part No. Part Name Description Local XC1-182K-00 (NX-3720E,NX-3720GE, Q204 LSCR523EBFS8 TRANSISTOR NX-3720HGK,NX-3720HK) Q205 EMD9 DIGI TRANSISTOR *Note : This part cannot be replaced.Therefore, Q206 VT6M1 Q301 SSM3K15AMFV this part is not supplied as a service part. Q401 2SC4617/S/ TRANSISTOR...
Page 193  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local D618 RB520SM-30 DIODE C116 CC730AD1H104J C CAPACITOR 0.1uF 50V J D619 RB521CM-30 DIODE C120 CC73HCH1H101J C CAPACITOR 100pF 50V J C123 CC73HCH1H221J C CAPACITOR 220pF 50V J C92-0968-05 E CAPACITOR...
Page 194  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C265 C93-1852-05 C CAPACITOR 6pF 250V C430 C93-1959-05 C CAPACITOR 0.1uF 16V C266 CK73HBB1H102K C CAPACITOR 1000pF 50V K C431 C93-1959-05 C CAPACITOR 0.1uF 16V C267 C93-2035-05...
Page 195  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C514 CK73HBB1H102K C CAPACITOR 1000pF 50V K RK73HH1J104D MG RESISTOR 100kΩ 1/16W D C515 CK73HB1C105K C CAPACITOR 1.0uF 16V K RK73HH1J104D MG RESISTOR 100kΩ...
Page 196  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R125 RK73HB1J106J MG RESISTOR 10MΩ 1/16W J R276 RK73PB2H560J MG RESISTOR 56Ω 1/2W J R127 RK73HB1J470J MG RESISTOR 47Ω 1/16W J R277 RK73PB2H560J MG RESISTOR 56Ω...
Page 197  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R466 RK73JB1H220J MG RESISTOR 22Ω 1/20W J R620 RK73HB1J472J MG RESISTOR 4.7kΩ 1/16W J R467 RK73JB1H220J MG RESISTOR 22Ω 1/20W J R621 RK73HB1J472J MG RESISTOR 4.7kΩ...
Page 198  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local LB73G0AK-001 CHIP FERRITE CP302 RK74HB1J100J NET RESISTOR 10Ω 1/16W J L107 LB73H0AV-003 CHIP FERRITE CP303 RK74HB1J100J NET RESISTOR 10Ω 1/16W J L108 L41-2785-53 CHIP INDUCTOR CP401...
Page 199  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local IC401 ------------ *Note D105 1SV282-F VARI CAP DIODE IC402 ------------ *Note D106 1SV282-F VARI CAP DIODE IC403 TC7SZ08FE D107 1SS400SM DIODE IC404 ------------ *Note D108...
Page 200  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local CK73GB0J106K C CAPACITOR 10uF 6.3V K 3820E,3820GE,38 C137 CC73HCH1H1R5B C CAPACITOR 1.5pF 50V B 20HGK2,3820HK2 CK73GB1H105K C CAPACITOR 1uF 50V K CK73HBB1H471K C CAPACITOR 470pF 50V K C137 CC73HCH1H020B C CAPACITOR...
Page 201  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local 3820HGK,3820HK C431 C93-1959-05 C CAPACITOR 0.1uF 16V C264 C93-2035-05 C CAPACITOR 9pF 500V C432 C93-1959-05 C CAPACITOR 0.1uF 16V 3820E,3820GE,38 C265 C93-1846-05 C CAPACITOR 4pF 250V 20HGK2,3820HK2...
Page 202  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C515 CK73HB1C105K C CAPACITOR 1.0uF 16V K R92-1061-05 C RESISTOR 0.008Ω C516 C93-1959-05 C CAPACITOR 0.1uF 16V RK73HB1J104J MG RESISTOR 100kΩ 1/16W J C517 CK73HB1C105K C CAPACITOR...
Page 203  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R115 RK73HB1J124J MG RESISTOR 120kΩ 1/16W J R262 RK73FB2B910J MG RESISTOR 91Ω 1/8W J 3820HGK,3820HK R116 RK73HB1J000J MG RESISTOR 0Ω 1/16W J R265 RK73HB1J223J MG RESISTOR...
Page 204  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R450 RK73JB1H220J MG RESISTOR 22Ω 1/20W J R531 RK73HB1J000J MG RESISTOR 0Ω 1/16W J R451 RK73JB1H220J MG RESISTOR 22Ω 1/20W J R532 RK73HB1J000J MG RESISTOR 0Ω...
Page 205  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local L219 LB73Z0DF-001 CHIP FERRITE L34-4902-05 AIR CORE COIL L220 LB73Z0DF-001 CHIP FERRITE 3820E,3820GE,38 L221 LB73Z0DF-001 CHIP FERRITE L34-4758-05 AIR CORE COIL 20HGK2,3820HK2 L222 L41-4775-53 CHIP INDUCTOR...
Page 206  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local FZA10BS-5R0 FUSE (CC) CC73HCH1H101J C CAPACITOR 100pF 50V J F53-0286-05 FUSE CK73HBB1H102K C CAPACITOR 1000pF 50V K 3820E,3820GE,38 CK73HBB1H102K C CAPACITOR 1000pF 50V K IC201 RA60H3847-501 MOS IC...
Page 207  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local RK73HB1J222J MG RESISTOR 2.2kΩ 1/16W J NJM2878F4-33 RK73HB1J222J MG RESISTOR 2.2kΩ 1/16W J ------------ *Note RK73HB1J222J MG RESISTOR 2.2kΩ 1/16W J 74AVC4TD245GU IC RK73HB1J222J MG RESISTOR 2.2kΩ...
Page 208  Symbol No. Part No. Part Name Description Local RK73HB1J000J MG RESISTOR 0Ω 1/16W J RK73HB1J103J MG RESISTOR 10kΩ 1/16W J RK73HB1J000J MG RESISTOR 0Ω 1/16W J RK73HB1J000J MG RESISTOR 0Ω 1/16W J RK73HB1J000J MG RESISTOR 0Ω 1/16W J LB73H0AV-002 CHIP FERRITE LB73G0AK-001 CHIP FERRITE...
Page 209 Packing materials and accessories parts list Block No.M2MM Packing and accessories Block No. [M][2][M][M]  Symbol No. Part No. Part Name Description Local H5A-0946-00 ITEM CARTON H1C-0152-00 PACKING FIXTURE (x2) ------------ PROTECTION BAG J19-1584-15 HOLDER 3720HGK,3720HK,3820HGK,3820HGK2,3820HK,3820HK2 J29-0726-03 BRACKET T91-0639-85 MICROPHONE KMC-35 3720HGK,3720HK,3820HGK,3820HGK2,3820HK,3820HK2 B5A-1680-00...
Page 210 JVC KENWOOD Corporation Communications Systems Division (No.RA054<Rev.001>) Printed in Japan...

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Kenwood NX-3720HG Service Manual

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Summary of Contents for Kenwood NX-3720HG

Page 1: Table Of Contents

Page 7: Precaution

Page 30: Disassembly

Page 33: Adjustment

Page 152: Troubleshooting

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