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Sansui AU-5900 Service Manual

Sansui AU-5900
20 pages
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Sansui AU-5900 Specifications

General IconGeneral
Input Sensitivity2.5mV (MM), 150mV (line)
Channel Separation50dB (MM), 55dB (line)
Speaker Load Impedance8Ω to 16Ω
Total Harmonic Distortion0.1%
Damping Factor40
Signal to Noise Ratio90dB (line)
Output150mV (line)
TypeIntegrated Amplifier

Summary

1. Block Diagram

Circuit Board List

Lists circuit boards by function and model number.

1. Specifications

Power Output Specifications

Details RMS power output for each amplifier model.

Input and Output Specifications

Lists input sensitivity, impedance, output levels, and channel separation.

Power Requirements and Dimensions

States voltage, consumption, physical dimensions, and weight.

Controls Overview

Lists and describes the function of front panel controls.

3. Parts Location and Parts List

3-1. F-2596 Power Amplifier Circuit Board

Shows component layout and identifies parts on the F-2596 circuit board.

3-2. F-2598 Earth Circuit Board

Displays the physical layout and component identification for the F-2598 circuit board.

3-3. F-2599 Equalizer Circuit Board

Details component layout and parts for the F-2599 equalizer circuit board.

3-4. F-2600 Switching Circuit Board (Pre-Main Amp)

Shows component layout for the F-2600 board connecting pre and main amplifiers.

3-5. F-2601 Switching Circuit Board (Pick-up Load)

Details component layout for the F-2601 board handling pick-up load switching.

3-6. F-2602 Lever Switch Circuit Board

Identifies components on the F-2602 lever switch circuit board.

3-7. F-2603 Volume & Balance Circuit Board

Shows component layout for the F-2603 volume and balance circuit board.

3-8. F-2608 Volume & Balance Circuit Board

Displays component layout for the F-2608 volume and balance circuit board.

3-9. F-2609 Lever Switch Circuit Board

Identifies components on the F-2609 lever switch circuit board.

3-10. F-2610 Tone Control Circuit Board

Shows component layout for the F-2610 tone control circuit board.

3-11. F-2611 Filter Circuit Board

Details component layout for the F-2611 filter circuit board.

3-12. F-2606 Tone Control Circuit Board

Displays component layout for the F-2606 tone control circuit board.

3-13. F-2607 Filter Circuit Board

Shows component layout for the F-2607 filter circuit board.

3-14. F-2604 Tone Control Circuit Board

Details component layout for the F-2604 tone control circuit board.

3-15. F-2605 Filter Unit Circuit Board

Identifies components on the F-2605 filter unit circuit board.

3-16. Figures of Semiconductors

3-17. Other Parts

Parts List and Exploded View

Provides a parts list and exploded view of unit components.

4. Troubleshooting Chart

Power Amplifier Block Diagram

Illustrates the operational flow of the power amplifier section.

Power Supply & Protector Block Diagram

Shows the functional overview of the power supply and protector circuits.

Power Amplifier Troubleshooting

Guides on diagnosing issues within the power amplifier section.

Power Supply & Protector Troubleshooting

Details troubleshooting steps for power supply and protector circuit problems.

Tone Control Circuit Functions

Explains the functions of tone control settings and their indicators.

5. Schematic Diagram

5-1. AU-5900 Schematic

Presents the complete schematic diagram for the AU-5900 model.

5-2. AU-6900 Schematic

Provides the schematic diagram for the AU-6900 model.

5-3. AU-7900 Schematic

Presents the schematic diagram for the AU-7900 model.

6. Adjustment

6-1. Driver Circuit Board Adjustment

Details the procedure for adjusting the driver circuit board bias.

6-2. Power Transistor Replacement

Explains the steps for replacing power transistors on the amplifier.

7. Packing List

8. Accessory Parts List

Common Parts Lists for Resistors & Capacitors

Types of Common Resistors & Capacitors

Categorizes common resistors and capacitors by type and specification.

Resistor Color Code Guide

Explains how to read color codes for resistors.

Capacitor Specifications and Types

Details various capacitor types, tolerances, and voltage ratings.

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