Panasonic DVD player model DVD-C220D (repost)
 

Before I give up on this thing I thought I would try to post it one
more time in the hopes that perhaps someone who may not have seen it
the first time might be able to help me with it now.

This unit will sometimes not play certain DVD's. The problem ones are
not home burned but commercial DVD's. I cleaned the laser and looked on

the optical assembly for a pot that I thought I would try to turn up
slightly in case the laser was weak but there was none. There are two
pots on the main board and one very tiny one of the type you would
expect to find on the optical assembly, on a piggy backed board mounted

on stand offs off the main board. I didn't want to touch anything
without knowing what they were though. Can anyone, familiar with this
model know if any of these are the adjustments I'm looking for? Thanks,

Lenny Stein, Barlen Electronics.