Case# 456234.Pioneer SX-950. Protection relay not clicking.
Outputs -OK.All voltages from power supply – ok.
Replacing capacitors on power supply section and 2 resistors 1.3 kohm (green on picture) on protection control board solved the problem.
Month: October 2022
Case # 342553. Mcintosh 754 amplifier. Missing left channel.
Case # 342553. Mcintosh 754 amplifier. Missing left channel. 09/27/2022
After troubleshooting found protection relay not working properly.
Relay replacement solved the problem.
Repair case # 125432. Pioneer SA-9500II amplifier – no sound, keeps blowing main fuse.
Repair case # 125432. Pioneer SA-9500II amplifier – no sound, keeps blowing main fuse.
4 Output transistors and main fuse replacement solved the issue.
Instead original transistors we installed MJE15032G / MJE15033G Transistors NPN/ PNP. Works even better then originals.( same terminal design, same configuration) . Main fuse- 4-6 Amp.
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