Yamaha ca-1000 |||

[Ytamshb]

I have yamaha ca-1000-||| this amp after i power on protection relay clicks and go off repeatedly I don’t know what’s happening i replaced all the capacitors and older soldering joints i resoldered.power supply borad transistor joints resoldered and power amp board transistor joints resoldered But problem still there can any one please help me

 

[avionic]

Check for DC voltage at the O (output) lug on the lower edge of the two amplifier boards. If less than 500mv. Look at solder connections on the underside power supply board. Especially look over TR403 and 404 solder connections.

 

[Ytamshb]

Check for DC voltage at the O (output) lug on the lower edge of the two amplifier boards. If less than 500mv. Look at solder connections on the underside power supply board. Especially look over TR403 and 404 solder connections.

I found the problems S5151R main diode short that the problem. Do you know equal replacement for S5151 i will upload photo

 

[w3jn]

@Ytamshb - you had no less than three concurrent threads on this issue. Per AK rules, one thread per subject. Otherwise it is impossible for those trying to help you to follow progress. I've deleted one thread and some posts in someone else's thread so please contain your issues with this equipment to this thread - thank you.