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Radio Shack Manuals
Transceiver
HTX-212
Service manual
Radio Shack HTX-212 Service Manual
2-meter amateur vhf-fm ham transceiver
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Also See for HTX-212
:
Owner's manual
(44 pages)
,
Owner's manual
(44 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Contents
Specifications
Block Diagram
Theory of Operation
Transmitter
Microphone Audio Circuit
Transmitter Stage and Harmonic Filter
RX and TX Voltage Controlled Oscillator Module
RX and TX Power Line Filter
Rx Vco
Tx Vco
Receiver
Out of Lock Detector
RF Amplifier
First Mixer and First if Amplifier
High Pass Filter
Audio Amplifier
Mute Circuit
Microprocessor
CTCSS Transmit
DTMF Decoding Circuit
DTMF Encoding Circuit
Channel Select Circuit
Alignment and Adjustment
Alignment Test Points and Parts Locations
RF Board
Digital Board
Phase Locked Loop and CPU Section
Test Equipment Required
General Alignment Procedure
Transmitter Section
Receiver Section
Troubleshooting
Error Display
Internal RAM Error
PLL Unlock Error
PLL Alignment
Printed Circuit Board
Rf Pcb
Digital PCB
Microphone PCB
Vco Pcb
Top View
Bottom View
Wiring Diagram
Exploded View
Exploded View Parts List
Main Set
Electrical Parts List
Semiconductor Lead Identification and IC Internal Diagrams
Pin Connection
Equivalent Circuit
Semiconductor Voltage Chart
Transistors
IC's
At Tone Squelch Function
At DTMF Squelch Function
RF Schematic
Microphone Schematic
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Quick Links
1
Block Diagram
2
Microphone Audio Circuit
3
Transmitter
4
Microphone Schematic
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Owner's Manual
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