Kenwood TS-570D Service Manual

The Kenwood TS-570D is a high-performance amateur radio transceiver featuring all-mode operation (SSB, CW, AM, FM, RTTY), frequency coverage of 1.8-30 MHz, 100W output power, built-in antenna tuner, DSP filtering, multiple IF filters, and comprehensive receiver/transmitter circuitry. This service manual provides detailed technical information for maintenance, repair, and alignment procedures.

1. Technical Specifications 2. Block Diagrams 3. Circuit Descriptions 4. Alignment Procedures 5. Troubleshooting Guide 6. Parts List 7. PCB Layouts 8. Wiring Diagrams 9. Mechanical Assembly 10. Firmware Information 11. Service Notes

Technical Specifications

Complete technical specifications and performance characteristics of the Kenwood TS-570D transceiver.

Parameter	Specification
Frequency Range	1.8-30 MHz (amateur bands)
Modes	SSB, CW, AM, FM, RTTY
Output Power	100W (SSB/CW), 40W (AM), 25W (FM)
Receiver Sensitivity	0.25 μV for 10 dB S+N/N
IF Filters	2.4 kHz, 500 Hz, 6 kHz (optional)
Power Supply	13.8V DC ±15%
Current Consumption	Receive: 2A, Transmit: 22A max
Dimensions	280(W) × 95(H) × 260(D) mm
Weight	4.5 kg
Antenna Impedance	50 ohms unbalanced

Block Diagrams

System block diagrams showing signal flow and major circuit blocks.

Overall System Block Diagram
Receiver Section Block Diagram
Transmitter Section Block Diagram
DSP Processing Block Diagram
Power Supply Block Diagram
Control System Block Diagram

NOTE! Refer to block diagrams when tracing signal paths during troubleshooting.

Circuit Descriptions

Detailed descriptions of major circuit sections and their operation.

Receiver Front End: RF amplifier and first mixer circuits
IF Stages: Multiple IF amplifiers and filter selection
DSP Section: Digital signal processing circuitry
Transmitter Chain: Driver and final amplifier stages
Power Supply: Voltage regulation and protection circuits
Control System: Microprocessor and interface circuits

CAUTION! High voltages present in transmitter and power supply sections.

Alignment Procedures

Receiver Alignment: RF front end, IF stages, BFO adjustment
Transmitter Alignment: Carrier suppression, sideband balance, power output
VCO Alignment: PLL lock ranges and modulation characteristics
Filter Alignment: Crystal and mechanical filter adjustments
Meter Calibration: S-meter, power meter, SWR meter calibration
Required Equipment: Signal generator, oscilloscope, power meter, dummy load

Troubleshooting Guide

Systematic troubleshooting procedures for common problems.

Symptom	Possible Cause	Corrective Action
No power	Power supply fault, fuse blown	Check DC input, replace fuse F1 (15A)
No receive audio	Audio amp failure, speaker connection	Check IC501, speaker wiring
Low power output	Final amplifier fault, bias adjustment	Check Q18-Q21, adjust VR10
Frequency instability	PLL fault, reference oscillator	Check IC2, X1 (10.24 MHz)
No transmit	PTT circuit, relay failure	Check Q14, RL1, microphone circuit

WARNING! Disconnect power before replacing components.

Parts List

Complete component listing with part numbers and specifications.

Semiconductors: Transistors, ICs, diodes with part numbers
Passive Components: Resistors, capacitors, inductors values
Mechanical Parts: Knobs, connectors, hardware
PCB Assemblies: Main board, front panel, power supply
Optional Parts: Filters, accessories, modifications

Tip: Use genuine Kenwood parts for replacements.

PCB Layouts

Printed circuit board layouts and component placement diagrams.

Main Unit PCB (component side and solder side)
Front Panel PCB layout
Power Supply PCB layout
Final Amplifier PCB details
Grounding and shielding arrangements

WARNING! Observe static precautions when handling PCBs.

Wiring Diagrams

Interconnection diagrams and cable routing information.

Connection	Description
Main harness	Interconnect between main units
Front panel harness	Control and display connections
RF cables	Antenna and filter interconnections
Power cables	DC input and internal power distribution
Accessory connectors	External equipment interfaces

Mechanical Assembly

Disassembly and reassembly procedures with exploded views.

Case removal and chassis access
Front panel disassembly
PCB removal and installation
Final amplifier replacement
Fan assembly maintenance
Reassembly sequence and torque specifications

CAUTION! Handle LCD display and front panel carefully.

Firmware Information

Microprocessor firmware versions and update procedures.

Main CPU: Version 1.20 or later recommended
DSP Firmware: Latest version for improved performance
Update Procedure: Via service programming interface
Factory Reset: Procedure for restoring default settings
Error Codes: Interpretation of display error messages

Service Notes

Important service bulletins and technical updates.

Service Bulletin	Description	Date
TS-570D-001	Improved final transistor mounting	2002-03-15
TS-570D-002	DSP firmware update procedure	2002-06-22
TS-570D-003	Power supply capacitor replacement	2003-01-10
TS-570D-004	Front encoder cleaning procedure	2003-08-05
TS-570D-005	Antenna tuner maintenance	2004-02-18

Service Contact: Authorized Kenwood service centers only