Eastham
More Class-A than ever!
So I recently bought a Yamaha CR-600, pretty sweet device but it's developed a mains hum in both channels and at first power up you can hear the transformer make a sort of very low humming noise until the protection relay kicks in and I think it's a bad diode in the FBR, The diodes in question are D802 - 805, 10DC-2, 10DC-2R, 10DC-1 and 10DC-1R, these are wierd diodes and I've never seen anything like them before. Any suggestions would be greatly appreciated. I'll also be shotgunning all the electrolytics on the PS board, and I might upgrade the filter caps later down the line but for now they test fine. Thanks!