Vintage Sanyo DCX 2700 Quad receiver issues

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Just got this unit for cheap.

I'm new to diyaudio. Have been posting in the full range section for a few weeks.

I have done a thorough deoxit on this unit.

Here's what's up: lots of humm through the speakers (no... it doesn't humm because it doesn't know the words...:rolleyes:).

Volume is quite low. I can get a bit of sound through all but one channel.

When the unit is on, when I touch the RCA inputs on the back the humm occurs or increases.

I've done a visual inspection inside and do not see any bloated/leaking capacitors, though I know that doesn't mean they are all good... just looking for obvious stuff.

I can probably get a schematic/service manual. I have replaced caps in my other Sanyo quad, so that's not problem. But I don't have any experience adjusting for "bias" if that's called for (I don't even know what that is... just read about it), or making any other internal adjustments/setting inside the machine.

I'm asking for suggestions, possible fixes/checks that I've not thought of.

Thanks.
 
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