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Yaesu Manuals
Transceiver
FTC-2640
Service manual
Yaesu FTC-2640 Service Manual
Vhf fm mobile transceiver
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
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Table of Contents
Contents
VHF Land Mobile Transceiver
General Description
Performance Specifications
General
Frequency Range
External Connections
Semiconductors
Ics
Fets
Transistors
Front Panel Controls and Switches
Microphone Jack
Volume
Power
Rear Apron Connections
Ant
Ext Sp
Power Cable/Connector
Installation
Antenna Considerations
While Transmitting
Typical SWR Test Setup
Physical Location of Transceiver
Power Connections
Power Cord Diagra M
Installation Step-By-Step Outline
Fmb-4
Base Station Installation
Power Transformer Primary Connections
Theft Guard Installation Using FHR-1
Installation Procedure
Microphone Connections
Operation
Technical Notes
Circuit Information
Parts Designations on Circuit Boards
Functions of Circuit Components
Circuit Description
Receiver
Transmitter
Automatic Final Protection Circuit
Automatic Power Control C Circuit
DC Voltage Changeover Circuit
PLL Local Signal Oscillator
Spurious Suppression at Antenna Jack
Spurious Radiation from the Case, Power Cable, Etc.
Deviation Circuit
Audio Filtering
Crystal Data
Frequency Relationships
Horn Relay Unit
AC Power Supply
Band Programming
Simplex/Duplex Programming
Viewed from Solder Side
Band Select Jumper Connections
Main Board PLL Section
Channel Frequency Programming
Additional Frequency Programming Examples
Band Table
Exploded View
Servicing
Board Layout
Top View
Bottom View
Main Board Part Layout
Power Amplifier Board Parts Layout
Diode Matrix Board Parts Layout
LED Board Parts Layout
Relay Board Parts Layout
Transistor & IC Pinouts
Level Diagram
Transmitter Section
Receiver Section
Voltage Chart
Soldering and Desoldering Technique on Printed Circuit Boards
Notes on Use of CMOS Components
Insertion of Parts on Circuit Boards
Basic Soldering Practice
Examples of Poor Soldering Practice
Soldering to Terminal Posts
Fault Localization
Typical Part Failures, Causes and Symptoms
Maintenance and Servicing
Regular Maintenance Plan
Performance Checks
RX Sensitivity Test Setup
Alignment
Recommended Alignment Equipment
Alignment Frequencies and Matrix Programming Chart
PLL Circuit
Pll VCV
PLL Frequency
PLL Level
PLL Section Alignment Points
Auto Tune
Exciter
Transmitter Section Alignment Points
Power Amplifier
APC and AFP
Spurious Check with Supply Voltage Variation
Modulation and Deviation
Receiver Circuits
First Local PLL
Second Local
Sensitivity
Squelch
Audio Output Distortion and S/N
Spurious Response
Troubleshooting
Parts List
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1
Vhf Land Mobile Transceiver
2
General Description
3
Frequency Range
4
Band Programming
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