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Kenwood TM-255E Service Manual

144mhz all mode transceiver

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Product manual (100 pages)

Instruction manual (66 pages)

Instruction manual (65 pages)

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Contents
Table of Contents
Bookmarks

Table of Contents

Front Panel Facilities
Contents
Destination List
Frequency Configuration
PLL Circuit
Frequency Processing PLL
Reference Frequency Uses
LO1 (PLL Loop)/Car
Transceiver Frequency Configuration
Frequency Processing Block Diagram
Receiver Circuit Configuration
Receiver Frontend
AGC Circuit
Noise Blanker Circuit
S-Meter Circuit
Detection Circuit
Squelch Circuit
Transmitter Circuit Configuration
ALC Circuit
Power Control Circuit
Thermal Protection
Auto Microphone Gain Control Function - SSB Mode
Data Terminal, Peripheral Circuits and Use
Transmit Signals
Receive Signals
Squelch Signal/Relay Output
Digital Control Circuit
LCD Assembly and Control Unit Data Communication Circuit
Panel (LCD Assembly) Microprocessor Reset Circuit
Panel Key Input/Vr Input
Display Circuit
Dimmer Circuit
Reset Circuit
Backup Circuit
Eeprom
PLL and DDS Control Circuit
TX-RX Unit Control Signal Circuit
Main Unit Key A/D Input
Encoder Circuit
Busy Signal/Beep
Subtone
CTCSS Input/Output - When Optional TSU-8 Is Connected
DTMF Input/Output
Menu Mode
PF Key Functions
Semiconductor Data
CPU: M37702M6B***FP (Control Unit IC1) Block Diagram
Functions of Pins
DTMF Encoder TC35219F Pin Connection/Block Diagram/Functions of Pins
DTMF Decoder LC7385M Pin Connection/Block Diagram/Functions of Pins
Electronic Volume Control
X57-4530-00, -11 TX-RX Unit (A/5 IF)
X57-4530-00, -11 TX-RX Unit (A/5 RF)
X57-4530-00, -11 TX-RX Unit (C/5 Final)
X57-4110-00 Vco
X57-4020-00 Fan
X53-3510-12, -21, 2-72 Control Unit
Parts List
Exploded View
Exploded View (Control)
Packing
Adjustment
Outline of Adjustment Mode
Service Adjustment Mode Menu
Panel Operation in Adjustment Mode
A0 Checksum Display
A1 RIT VR Mechanical Center Correction
A2 IF-Shift VR Mechanical Center Correction
A3 LSB Carrier Point Adjustment
A4 USB Carrier Point Adjustment
A5 S Meter Curve Adjustment (S1) (any Mode Except FM)
A6 S Meter Curve Adjustment (S9) (any Mode Except FM)
A7 S Meter Curve Adjustment (Fullscale) (any Mode Except FM)
A8 S Meter Curve Adjustment (S1) (FM)
A9 S Meter Curve Adjustment (Full Scale) (FM)
AA RF Meter Curve Adjustment (Low)
AB RF Meter Curve Adjustment (Middle)
AC RF Meter Curve Adjustment (High)
AD DTMF Single Tone Output
AE ALC Start Read
AF ALC Zone Max. Read
B0 ALC Full Scale Read
B1 FM Microphone Gain
B2 SSB Microphone Gain
B3 Write into EEPROM
Test Equipment for Adjustment
Adjustment Service Jig
Service Jigs Usage
TX/RX Common Adjustment
PLL/CAR Adjustment
RX Adjustment
TX Adjustment
TX-RX Unit (C/5) Diagram
TX-RX Unit (B/5) Diagram
TX-RX Unit (A/5) Diagram
PC Boards Views
Schematic Diagram
Wiring Diagram
Level Diagram
DFK-7A External View
Specification
DFK-7A Connection
PG-5A External View
Specifications

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Kenwood TM-255E Service Manual

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