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Adcom 5800 bias and DC balance repair help in Pittsburgh area?

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strlok:
Hey folks,

Found this forum from a google search trying to find vintage audio equipment repair in the Pittsburgh PA area.

I received a mint condition Adcom 5800 amp that I believe the bias and DC balance are off. The high end sounds harsh.

Supposedly the four cheap potentiometers, two for each channel, may have changed their position while enroute to me via shipment and need readjusted.

I was wondering if anyone here knows anyone in the Pittsburgh area that could help re-bias and adjust the DC balance in my Adcom? It also seems like swapping out the capacitors (this is an old 1994 amp) might be also beneficial but not sure.

Thanks,
Rob

Sir Thrift-a-Lot:
What part of town are you in?   Do you have a manual?

strlok:
Hi, I live in the Castle Shannon area, South Hills.

I do have the 5800 Service Manual which has the schematics:

https://www.manualslib.com/manual/972393/Adcom-Gfa-5800.html#manual

strlok:
Sorry doesn't look like I can edit my previous post.

But here is an owner's manual as well:

https://www.manualslib.com/manual/206141/Adcom-Gfa-5800.html

Vpgh:

--- Quote from: strlok on November 09, 2020, 01:49:36 AM ---Sorry doesn't look like I can edit my previous post.

But here is an owner's manual as well:

https://www.manualslib.com/manual/206141/Adcom-Gfa-5800.html

--- End quote ---
You can call to Galaxie Electronics @ Murray/Sq. Hills.

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