Yamaha C-50 Troubleshooting and Repair

[@ryanfuller5]

I have a C-50 where the right channels output puts my amplifier into protect mode. I noticed you said you made adjustments to the outputs, unfortunately you did not show that in this video. Is this something you can measure using a DVM/DMM or do you need an oscope to measure the voltage? I have the same service manual you showed, and I see there are test points... just curious if this can even be measured without a scope. Also, can you tell me the difference in the adjustment types?

[@capriracer351]

All that you need is a multimeter that is sensitive in the DC millivolts range. Just do each adjustment in order as it is listed in the service manual. This will equalize the outputs. The potentiometers are very sensitive though, so be careful. You do not want the adjustment to go way out of range.

[@ebbenraves4338]

Do you have a part # for the relays? I have a C50 that probably needs them.

[@capriracer351]

HB2E-DC24V They seem to be getting hard to find. Any I found on eBay was coming from China and did not look to be the quality of the ones I bought last November.

[@ebbenraves4338]

Thanks1@@capriracer351