I'm repairing a Sony TA-F550ES amplifier from the early 90s that had some intermittent sound issues.

TA-F550ES Service Manual:
https://elektrotanya.com/sony_ta-f550...

I replaced the original Omron G5R-2232P protection relays with the currently available equivalent Omron G2RG-2A4 24VDC type which can be purchased from many electronics parts stores.

TIME STAMPS:
0:00 Introduction
2:21 A Look inside
6:49 Setting the Idling Current
10:48 Troubleshooting
13:39 Disassembly
22:18 Replacing the Speaker Protection Relays
26:43 Dust Removal & Reassembly
28:55 Cleaning Potentiometers & Switches
45:12 Reassembly
46:11 Final Test Run
48:32 More Cleaning & Full Reassembly
50:45 Thank you & Good night

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