Any advice? - DRam - Vintage Asylum

Any advice?

Posted by DRam (A) on March 7, 2016 at 08:28:01

To begin, I have very minor knowledge of electronics and circuitry. I can read a schematic and have basic knowledge of transistors, capacitors, etc. However the extent of my repair experience has been cleaning circuit boards in a couple devices and recapping a couple speakers. That said:

My Denon DRA-1025R is in need of help. After playing for 15 -20 minutes the left channel begins to fade. Eventually it takes 2 to 3 notches left on the balance to keep balanced sound.

After considerable time searching the web and going over schematics / wiring diagrams I have come to the conclusion that the problem most likely lies specifically in the left channel section of the amplifier board. And that the most likely culprit would be a capacitor or capacitors.

At that point I am stumped. Are there any guide lines as to where to start? Does one just begin pulling capacitors out, checking them and replacing until a malfunctioning one is found? Or is there a logical test sequence that will indicate a beginning point. Finally, since the left channel is going, is there a good chance the right channel is on the brink? And if so, would it be a good idea to just replace components on both as a precaution?

Thanks in advance for your advice.

Ron

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Topic - Any advice? - DRam 08:28:01 03/07/16 (4)

RE: Any advice? - TimeConstant 14:16:55 03/10/16 (1)

Thanks. - DRam 12:23:49 03/11/16 (0)

RE: Any advice? - fredtr 17:18:31 03/07/16 (1)

Thanks. I'll try that. nt - DRam 11:50:32 03/08/16 (0)

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