Marantz 170DC

[michael1948]

I have a Marantz 170DC with a left channel problem. Turned on and not connected to a preamp I am reading 193mv on the left channel. on the right channel I am reading 15mv. I am using a fluke model 27 to measure with.

I am new and I posted that I had to replace the dual ps cap with 2. Doing that was a little tedious since I haven't picked up a solder iron in 30 years. It went fine and I have played the amp over 10 hours since I replaced the ps caps.

I decided to replace the left channel electrolytic caps with the list provided on AK. I replaced c722,c723,c708,c707,c718,c717, and c711. I didn't purchase the poly caps so they are original

I have not touched the balance pot. My trouble shooting skills are fading. I gave my tex 422 scope away and my signal gen. Any suggestions would be appreciated.

Regards
Mike

 

[catrafter]

Are you talking about the DC balance (also know as DC offset) adjustment in section 3.1 of the service manual? Does adjusting R719 not change the voltage?

I would do some more investigation before changing any components.

Tom