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Manuals
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Standart Manuals
Transceiver
C508
Service manual
Standart C508 Service Manual
Double-band
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Table Of Contents
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Contents
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Table of Contents
Contents
Introduction
Accessories
Options
Controls and Connections
All-Reset Procedure
Theory of Operation
PLL Block
PLL Block Diagram
Programmable Divider
Phase Comparator
Charge Pump
PLL Loop Filter
Unlock Detect Circuit
UHF Band
Transmit Status
Receive Status
Receiver Block
RF Amplifier Circuit
First Mixer Circuit
VHF Band
First if Amplifier Circuit
Second if Circuit
Second if IC Block Diagram
Audio Circuit
Squelch Circuit
Tone Decoder
Transmitter Block
Microphone Amplifier
Preamplifier
Power Amplifier
Tone Encoder
Control Block
Beep/Tone Burst
Display
LCD Pin Layout Diagram
Disassembly
Transceiver Disassembly
Removing the Front Case
Removing the Battery Case
Packing Diagram and Parts List
Removing the Control P.C. Board
Removing the Tone Squelch Unit
Removing the TX/RX P.C. Board
Adjustment
Adjustment Connection Diagrams
Transmission Connection Diagram
Reception Connection Diagram
Adjustment Point Diagram
Adjustment and Confirmation
VCO Transmission Frequency Adjustment
Deviation Adjustment and Confirmation
Tone-Burst Deviation Adjustment
Transmission Output Confirmation
Tone Encoder Adjustment
Audio Output Adjustment
Reception Sensitivity Confirmation
Signal Strength Meter Sensitivity Adjustment
Squelch Adjustment
Tone Squelch Reception Confirmation
Specifications
Parts List
Chip Parts
Comprehensive Wiring Diagram
Schematic Diagram and Component Overlay Diagram
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This manual is also suitable for:
C508a
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