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Manuals
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Revox Manuals
Stereo Receiver
B780
Service manual
Revox B780 Service Manual
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:
Service manual
(107 pages)
,
Service manual
(107 pages)
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Table Of Contents
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Contents
Table of Contents
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Table of Contents
Contents
Adjustment Instructions
General
Index to the Operating Controls
Tuner Section
Amplifier/Preamplifier Section
Connector Panel
Socket Layouts
Disassembly
Removing the Top Cover Plate
Removing the Bottom Cover Plate
Removing the Side Covers
Removing the Heat Sink Incl. Power Stage PCB
Removing the Rear Cover
Removing the Terminal Board Cover
Removing the Operating Panel
Removing the Front Panel
Replacing the Illumination Lamp of Signal Strength Meter
Replacing the Signal Strength Meter
Replacing the Power Switch
Replacing the Power Line Fuse
Replacing the Power Supply Fuse
Description of Functions
Balance-To-Unbalance Transformer
RF Input Section
FM Demodulator
Stereo Decoder
IF Amplifier
Frequency Synthesizer and Local Oscillator
Logic Section
Microcomputer PCB
Audio Section
Meter Circuit and De-Emphasis
Audio Connection Unit
Preamplifier
Tone Control PCB
Power Amplifier
Thermal Protection
Speaker Protection
Dolby Processor PCB
Power Supply
Required Measuring Instruments
Checking the Supply Voltages
Brief Test for Correct Functioning
Preparatory Steps for Adjustments
Calibrating the Synthesizer Quartz Reference
Calibrating the Local Oscillator and Synthesizer
Tuning the RF Circuits
Adjusting the if Filter, if Amplifier and the Display Discriminator
Adjusting the Stereo Decoder
Adjusting the AF Level of the Tuner Signal
Amplifier Adjustments
Adjusting the Closed-Circuit Current for both Power Stages
Function Diagram
Power Supply Unit
Station Selection Keyboard
Push Button Board
Input Selection Keyboard
RF Front End PCB
IF Amplifier PCB
FM Demodulator PCB
Technical Data
Dimensions
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Adjustment Instructions
2
Amplifier/Preamplifier Section
3
Power Amplifier
4
Technical Data
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