Sansui 5000X channel mismatch

[scootsity5]

Hello all

I just recapped my Sansui 5000X and at the end noticed a massive channel unbalance. The right channel is outputting about 10-20V (peak-to-trough: when the left channel was at -20 to 20, the right was at - 10 to 10 using a 1khz sine) less than the left channel. I hadn't noticed because I'd recently been using the preamp to drive a head amp.

The issue is definitely in the power-amp and not the pre-amp. When adjusting the output and biasing, I was able to quantify the mismatch on the scope.

Can I just bring the left channel output level down to compensate (this is in the service manual, but is suggested for clipping, not for unbalanced output)? I did notice that when the left channel clips, it clips flat, when the right channel clips, it is not a flat clip, but is more sloped (this clipping is a part of the service manual adjustment of the output level -- I apologize if I'm not being clear, i need to sleep....)

Is there a usual suspect to go after here?

By the by, the recapping made a night and day difference in both channels, it sounds great! Unfortunately, one is a lot louder than the other.

Thanks in advance!

 

[AnalogueBen]

Hi ,
Sounds unusual. I would go over all your work and look for any errors when comparing to the good channel. I'm no expert but this is what Id try look for. Good luck and keep us posted.
Btw I'm new to a 5000X myself. Incredible.