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Kenwood NX-5300 K2 - User Manual

Kenwood NX-5300 K2
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SERVICE MANUAL
COPYRIGHT © 2015 JVC KENWOOD Corporation
No.RA015<Rev.002>
2015/9
B5B-7154-10
UHF DIGITAL TRANSCEIVER
RA015<Rev.002>20159SERVICE MANUALB5B-7154-10
NX-5300
COPYRIGHT © 2015 JVC KENWOOD Corporation
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105
NX-5300 F3,F6,K3,K6,ENX-5300 F2,F5,K2,K5,E2
This service manual has been revised due to the addition of NX-5300 type E, E2.
REVISED
This product complies with the RoHS directive for the European market.
This product uses Lead Free solder.

Table of Contents

Questions and Answers

  • S
    sonyaterryAug 16, 2025
    How to fix LCD displaying control abnormal value on Kenwood NX-5300 K2?
    • J
      Jodi LaneAug 17, 2025
      If the LCD of your Kenwood Transceiver displays an abnormal control value, remove the following parts: C47, R21, R39, R66, Q32, IC36, and IC61.
  • A
    Abigail ColeAug 19, 2025
    What to check if CS4 has an abnormal voltage in Kenwood NX-5300 K2 Transceiver?
    • V
      Vernon MooreSep 12, 2025
      If CS4 has an abnormal voltage in your Kenwood Transceiver, check the terminal of L802, re-insert the FPC of the LCD module, and replace the LCD module.
  • S
    Sarah VasquezAug 22, 2025
    What to do if IC706 (1 pin) is 0V or 1.8V in Kenwood Transceiver?
    • N
      Nancy DanielsAug 22, 2025
      If IC706 (1 pin) is 0V or 1.8V in your Kenwood Transceiver, remove the following parts: SBC MPU/DSP side R21 3.3V C47 R21 R39 R66 Q32 IC36 IC61.
  • R
    riggsshawnAug 25, 2025
    What does it mean if Reset/Control signal has an abnormal value in Kenwood Transceiver?
    • J
      James BarberAug 26, 2025
      If the Reset/Control signal of your Kenwood Transceiver has an abnormal value, and correcting the voltage doesn't solve the issue, it indicates a problem other than the BGA parts.
  • S
    Sherry TownsendAug 27, 2025
    Why my Kenwood NX-5300 K2 cannot be powered on?
    • K
      Katherine RobertsonAug 27, 2025
      If your Kenwood Transceiver cannot be powered on and the LCD does not function, it may be due to broken BGA parts on the printed circuit board (XC1-0341-82/XC1-0341-83). It is recommended to bring the printed circuit board in for service.
  • M
    Monica SchmittAug 30, 2025
    What to do if /FRST is always 0V in Kenwood NX-5300 K2?
    • R
      rpaulAug 30, 2025
      If /FRST is always 0V on your Kenwood Transceiver, remove D705 to check the voltage of the Flash memory side R747.
  • L
    Lauren ClarkeSep 1, 2025
    What to do if CN2 voltage is less than 6V in Kenwood NX-5300 K2 Transceiver?
    • D
      Daniel MyersSep 2, 2025
      If CN2 voltage is less than 6V on your Kenwood Transceiver, charge the battery.
  • D
    David LozanoSep 5, 2025
    How to check voltage of the 33M in Kenwood Transceiver?
    • C
      christie99Sep 5, 2025
      To troubleshoot an abnormal voltage at 33M on your Kenwood Transceiver, remove L712 to check the voltage of the 33M.
  • C
    clinerobertSep 7, 2025
    How to check voltage of the 18M_3 in Kenwood NX-5300 K2?
    • D
      David TaylorSep 7, 2025
      To troubleshoot an abnormal voltage at 18M_3 on your Kenwood Transceiver, remove L719 to check the voltage of the 18M_3.
  • J
    Jason ByrdSep 10, 2025
    How to check voltage of the 18M in Kenwood NX-5300 K2?
    • J
      Jenny MorganSep 10, 2025
      To troubleshoot an abnormal voltage at 18M on your Kenwood Transceiver, remove L710 and L711 to check the voltage of the 18M.

Summary

SECTION 2 SPECIFIC SERVICE INSTRUCTIONS

2.1 SYSTEM SET-UP

Describes the system setup and initial configuration process for the transceiver.

2.2 REALIGNMENT

2.2.2 How to Enter Each Mode

Provides instructions on accessing different operational modes of the transceiver.

2.2.3 Panel Test Mode

Explains the functions and operations within the panel test mode.

2.2.4 Panel Tuning Mode

Describes the procedures for entering and utilizing the panel tuning mode.

2.2.5 PC Mode

Details the procedures for communicating with the transceiver via PC.

2.2.6 Firmware Programming Mode

Firmware Programming Procedures

Covers the steps for programming firmware, including connection and data writing.

2.2.7 Clone Mode

2.2.8 Front Panel Programming Mode

Entering and Data Writing

Explains how to enter front panel programming mode and write data.

2.4 CIRCUIT DESCRIPTION

Receiver System Circuits

Details the RF and IF circuits within the receiver system.

2.4.4 Transmitter System

Transmitter System Circuits

Describes the audio band, baseband, drive, final, and APC circuits.

2.4.5 PLL Frequency Synthesizer

PLL Frequency Synthesizer Components

Details the TCXO, VCO, and PLL IC components.

SECTION 3 DISASSEMBLY

Disassembly Precautions

Disassembly Procedures

Front Case and Holderassy Removal

Instructions for removing the front case and holder assembly.

LCD Shielding and Main Unit Removal

Steps for removing the LCD shielding case and main unit.

SECTION 4 ADJUSTMENT

4.1 TYPE Controls and Preparations

4.2 Panel Test Mode

Explains test mode operations, key functions, and frequency/signaling settings.

4.3 Panel Tuning Mode

4.4 BER (Bit Error Rate) Measurement

4.9 Transmitter Section

4.10 Receiver Section

Receiver Section

Sensitivity 2

4.11 E, E2 TYPE Controls

Preparations for Checking;Tuning

4.12 Panel Test Mode

Explains test mode operations, key functions, and frequency/signaling settings.

4.13 Panel Tuning Mode

Tuning Procedures and Operations

4.14 BER (Bit Error Rate) Measurement

4.19 Transmitter Section

Necessary Deviation Adjustment Items

4.20 Receiver Section

Sensitivity 1

SECTION 5 TROUBLESHOOTING

Fault Diagnosis of BGA IC

Flowchart for diagnosing transceiver power issues related to BGA ICs.

5.2 Failure diagnosis of the GPS section

5.3 Failure diagnosis of the Bluetooth section

5.4 Replacing Main Unit

Kenwood NX-5300 K2 Specifications

General IconGeneral
Power Output5W
Operating Voltage7.5V DC ±20%
Operating Temperature Range-30°C to +60°C
RF Output Power5W / 1W
IP RatingIP67
Channel Spacing12.5 kHz, 25 kHz
Digital ProtocolNXDN, P25
Modulation16K0F3E, 11K0F3E
Battery LifeUp to 14 hours (with KNB-57L battery)

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