Kenwood TS-670 - Service Manual

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Model TS-670
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CONTENTS
SPECIFICATIONS .2
CIRCUIT DESCRIPTION 3
PARTS LIST 11
PC BOARD VIEW 18
SWITCH UNIT
(X41-1550-00) 18
RF UNIT
(X44-1 580-00) 19
IF UNIT
(X48-1390-00) 20
CONTROL UNIT
(X53-1370-00) 21
FINAL UNIT (X45-1350-00) 22
FILTER UNIT (X51-1 320-00) ..22
DISPLAYUNIT (X54-1800-00) m22
ENCODER UNIT (W02-0328-10) 22
ADJUSTMENT .22
PACKING ...... , ... 31
LEVELDIAGRAM 34
BLOCKDIAGRAM .35
DISASSEMBLY .36
TERMINALFUNCTION .38
OPTION .42
G C-1 O. .... . ... .. .... ... .. . .. ... ... .... ... . ..42
FM-430 .46
VS-1 .48
SCHEMATIC DIAGRAM 47
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Summary

TS-670 Specifications

Transmitter Specifications

Transmitter performance characteristics and parameters.

Receiver Specifications

Receiver performance characteristics and parameters.

TS-670 Circuit Description

Outline and Reception Configuration

Transmission Circuit Configuration

Detailed explanation of the transmission signal path and components.

PLL Circuit Description

Digital Control Circuit Description

TS-670 Adjustment Procedures

Required Test Equipment

Voltage and Control Adjustments

Procedures for adjusting internal voltage and control circuit parameters.

VCO and RX Adjustments

Procedures for tuning VCO and receiver circuits.

TX Adjustments

Procedures for tuning the transmitter circuits.

TS-670 Disassembly and Terminal Functions

Disassembly Procedure

TS-670 Schematic Diagrams

Block Diagram

RF Unit Schematic

Detailed schematic of the RF Unit (X44-1580-00).

IF Unit Schematic

Detailed schematic of the IF Unit (X48-1390-00).

Control Unit Schematic

Kenwood TS-670 Specifications

General

Supply Voltage	13.8 V DC
Type	HF Transceiver
Modes	AM, FM, SSB, CW
Tuning Steps	10 Hz
IF Rejection	>70 dB
Image Rejection	>70 dB