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Yamaha A-520 Service Manual

Yamaha A-520
26 pages
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Yamaha A-520 Specifications

General IconGeneral
Weight9.5 kg
Damping Factor60 (8 ohms, 1 kHz)
Channel Separation60 dB (1 kHz)
Frequency Response20Hz to 20kHz
Signal to Noise Ratio100dB (line)
Input Sensitivity150mV (line)
Speaker Load Impedance4-16 ohms

Summary

To Service Personnel

Critical Components Information

Critical components require replacement with identical specifications for proper function.

Leakage Current Measurement

Verify insulation of exposed surfaces after service for safety.

Block Diagram

Specifications

Disassembly Procedures

Adjustments

Idling Current Adjustment

Adjust VR107/VR108 for 5mV±2mV across R217/R218 after power-on.

Printed Circuit Board (Pattern Side)

Wiring

Schematic Diagram

Parts List

Warning on Component Replacement

Components with special characteristics must be replaced with identical parts.

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