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Kenwood Manuals
Two-Way Radio
TH-78A
Service manual
Kenwood TH-78A Service Manual
144/430 (440) mhz fm dual bander
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Also See for TH-78A
:
Instruction manual
(72 pages)
,
Instructions
(4 pages)
,
Instruction manual
(69 pages)
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Table Of Contents
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Contents
Table of Contents
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Table of Contents
Contents
Circuit Description
Frequency Configuration
Receiver System
VHF Receiver
RX Selection Block Diagram
Sub VHF Receiver
UHF Receiver
Sub UHF Receiver
Audio Circuits
Receiver Audio Signals Switching
RX Audio Switching Circuit
External Speaker Detection
Audio Amplifier
Squelch Circuit
S Meter Circuit
Transmitter System
Modulator Circuit
88.5 Hz LPF
Driver and Final Amplifier
APC Circuit
Power Supply Circuit
Save Circuit
PLL Circuit
Pll
Vco-V
Vco-U
Unlock Detection Circuit
LED Drive Circuit
Remote Control Microphone Circuit
Microcomputers and Peripheral Circuits
Reset and Backup Circuits
DTMF and Dtss/Paging
DTMF Encode
DTMF Decode
DTMF Decode Timing
CTCSS Operation
Speaker, Microphone, Remote Circuit
Description of Components
Control Unit
TX-RX Unit
Semiconductor Data
Block Diagram
Pin Functions
Pin Layout
UHF Power Module
Maximum Rating
Electrical Characteristics
Microcomputer
Pin Connection
I/O Port Specifiations
Parts List
Disassembly
Adjustment
Required Test Equipment
Preparation
TH-78 Adjustment
Adjustment Point
Wiring Diagram
Unit Boards
Level Diagram
Terminal Functions
Battery Case
Head Set with Vox & PTT
Extension Memory Unit
DC Cord
Plug with Cord
SC-35 External View
SC-36 External View
MB-6 External View
WR-2 External View
SMC-31 External View
SMC-32 External View
SMC-31 Specifications
SMC-32 Specficiations
SMC-33 Specifications
HS-9 External View
TSU-7 PC Board View
TSU-7 Parts List
PC Board Views
Circuit Diagram
Specifications
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Contents
2
Circuit Description
3
Frequency Configuration
4
Circuit Diagram
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See also:
Instruction Manual
Table of
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