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Phase Linear 4000 Series Service Manual

Two preamplifier

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Table Of Contents

Table of Contents

Schematics
Layout Diagram
Pcb
Contents
Technical Specifications
Schematics and Diagrams
Block Diagram
Schematic Diagrams
Circuit Descriptions
Active EQ
Headphone Amplifier
Log Amplifier
Filter Board
Gate Board
Expander
Disassembly Procedure
Test Procedure
Energizing
Tape Functions
Main Outputs and Volume Tracking Test
Stereo/Mono, Separation
-20Db Switch
Peak Unlimit
Correlator
Infrasonic Filter
Balance
Tone Controls
Active Equalizer
High Level Noise
Headphone Output
Troubleshooting Guide
Power Supply Malfunction
Power LED will Not Light up
Incorrect DC Supply Voltage
Tape Circuit Malfunction
Malfunction of Main Outputs
Excessive Turn-On Time
No Signal at Main Outputs
Stereo/Mono Malfunction; Poor Separation
Volume Control Mistracking
-20Db Circuit Malfunction
Peak Unlimit Malfunction
Loss of One Channel
Excessive Noise in One Channel
Peak Unlimit LED out
Correlator Malfunction
Loss of Expansion
Loss of High or Low Frequencies
All High Frequency Gates down
One of Two High Frequency Gates down
Low Frequency Gate down
All Gates down
No Noise Reduction
Log Amplifier Adjustment and Correlator Sensitivity
Loss of One Channel/Excessive Noise in One Channel
Infrasonic Filter Malfunction
Channel Imbalance
Tone Circuit Malfunction
Loss of One of both Channels When Filter Is Switched in
Active Equalizer Malfunction
Excessive Noise in Phono Circuit
Loss of Channel When Tone Circuit Switched in
Tone Turnover Circuit Malfunction
Headphone Output Malfunction
Excessive Noise Not Affectd by the -20Db Circuit
Insufficient Output into an 8 Ohm Load
Parts List

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1 Schematics
2 Layout Diagram
3 Technical Specifications
4 Schematics and Diagrams
5 Parts List
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Summary of Contents for Phase Linear 4000 Series

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700 series two

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Phase Linear 4000 Series Service Manual

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