To Next PageTo Next PageWhat to do if power supply of SRAM has an abnormal voltage in Kenwood Transceiver?
If the power supply of SRAM has an abnormal voltage, remove L710 to check the voltage of the 31BU. If the voltage becomes normal, the SRAM is broken.
What to do if power supply of FLASH has an abnormal voltage in Kenwood Transceiver?
If the power supply of FLASH has an abnormal voltage, remove L717 to check the voltage of the 33M. If the voltage becomes normal, the FLASH is broken.
What to do if power supply of DSP has an abnormal voltage in Kenwood TK-5220 K?
If the power supply of DSP has an abnormal voltage, remove L712 to check the voltage of the 33M. If the voltage becomes normal, the DSP is broken.
What to do if power supply of ASIC has an abnormal voltage in Kenwood Transceiver?
If the power supply of ASIC has an abnormal voltage, remove L714 to check the voltage of the 33M. If the voltage becomes normal, the ASIC is broken.
General| Operating Voltage | 7.5V DC ±20% |
|---|---|
| Operating Temperature | -30°C to +60°C |
| IP Rating | IP54/55 |
| Frequency Range | 136-174 MHz |
| Power Output | 5W |
| Channel Spacing | 12.5 kHz / 25 kHz |
Details the intended audience and scope of the service manual, including service bulletins and revisions.
Essential safety guidelines for handling and servicing the transceiver to prevent hazards.
Information on the transceiver's design for easy servicing and references to internal diagrams.
Describes the different operating modes of the transceiver and their functions.
Details the setup and connection procedure for programming the transceiver via PC.
Instructions for upgrading the transceiver's firmware, including connection and programming steps.
Step-by-step instructions for installing the optional VGS-1 unit into the transceiver.
Important precautions regarding waterproof efficiency and material removal during disassembly.
Guidelines and procedures for safely disassembling the transceiver, including unit removal.
Important considerations and steps for correctly reassembling the transceiver components.
General description of the transceiver's main functional blocks and frequency configuration.
Detailed description of the RF, IF, and Audio amplifier circuits within the receiver system.
Detailed description of the Audio band, Base band, VOX, Drive, Final amplifier, and APC circuits.
Description of the control circuit, memory circuit, DSP, and power supply components.
List and description of components found on the Control Unit (X53-4480-XX).
List and description of components found on the TX-RX Unit (X57-7820-10).
Comprehensive list of parts for the Control Unit (X53-4480-XX), including reference numbers.
Comprehensive list of parts for the TX-RX Unit (X57-7820-10), including reference numbers.
Procedure for diagnosing transceiver power-on issues related to BGA IC failures.
Steps to check power supply voltages at various points to diagnose faults.
Procedure for checking clock signals and reset/control signals for troubleshooting.
Troubleshooting steps for identifying abnormal voltage points and affected ICs.
Overview of features and operation within the transceiver's panel test mode.
Explanation of key functions and operations for controlling the transceiver's modes.
Detailed procedures for adjusting transmitter parameters like power, balance, and deviation.
Detailed procedures for adjusting receiver parameters such as AF level and sensitivity.
List of necessary test equipment and their major specifications for alignment procedures.
Key general specifications including model, frequency range, channels, and operating conditions.
Detailed receiver performance specifications like sensitivity, selectivity, and audio output.
Detailed transmitter performance specifications including RF power output and modulation.
Description of pin functions for the Control Unit CN1, CN23, CN403 connectors.
Description of pin functions for the TX-RX Unit CN400, CN401, CN405 connectors.
Detailed pinout and function description for the universal connector.
Component layout diagram for the Control Unit PC Board (X53-4480-XX).
Component layout diagram for the TX-RX Unit PC Board (X57-7820-10).
Detailed schematic diagram of the Control Unit (X53-4480-XX).
Detailed schematic diagram of the TX-RX Unit (X57-7820-10).
Functional block diagram illustrating the Control Unit's internal architecture.
Functional block diagram illustrating the TX-RX Unit's internal architecture.
External view, specifications, and schematic diagram for the KNB-47L battery pack.
External view, specifications, and schematic diagram for the KNB-48L battery pack.
Overall specifications including model, frequency range, channels, and operating environment.
Detailed receiver performance metrics such as sensitivity, selectivity, and distortion.
Detailed transmitter performance metrics like RF power output, spurious emissions, and audio distortion.
