Another day, another basketcase Duo

[ApolloBoy]

I've been working on a TurboDuo for someone and I've been having some problems with it. I've already completely recapped it and while the HuCard and PCM audio are fine, the CD audio is very quiet. The disc drive is also acting up pretty bad; original games never load and music CDs skip through tracks as if it's on fast forward. I replaced the laser but it's still having issues.

The disc loading issue might a calibration issue but I'm not entirely sure what's causing the CD audio problem. At first I thought it was some bad traces or vias but the board is fine. Maybe there's a bad op-amp somewhere?

[ApolloBoy]

Thought I'd give an update on this even though I haven't worked on it in a while. I tried replacing the laser a few weeks back thinking that was the issue, but no luck. Any ideas?

[thesteve]

jumping tracks could be a bad tracking motor, binding or adjustment.
the low CDA is often an open via between C322 and R322

[Jugbug]

When I recapped my duo, game CDs wouldn't load anymore but adjusting the pots corrected the problem.  While working with them I would come across the fast forward/skipping tracks issue.  I think VR103 and VR105 were helpful in correcting that, if I recall.  Hope you get things figured out.