Today I fixed my (OK, it's technically my little brothers', through a long and boring story...) D-141, after dropping it onto hard ground off about a 6 foot pole. After it's landing, I attempted to play a disc, and my first clue that something was wrong was that it wasn't showing the total tracks/minutes when it first read it. Then, it got onto Track 00, and sat there reading the disc over, and over, and over. Eventually it would play if you manually moved it to Track 01, but it took about 30 seconds. I read this Sticky and another repair thread mentioned in it, and took mine apart. There are three pots in there, each with an orangish-yellowish screw.
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Laid out something like that on the board, with the LCD facing you. The one on the upper left, *do not touch*. I haven't the slighest clue what it does, but the disc refuses to play unless it's in a precise position (slightly left of center, I believe)
The one on the lower right seems to control rotational speed. I attempted slowing it down, with the idea that it might improve battery life, but it didn't seem to slow it down much unless it was on the extreme right, in which case it wouldn't read.
The one in the middle is the one you want. I assume this has something to do with the tracking mechanism. Normally, it's slightly left of center. If you turn it to the right, it constantly skips, even if sitting still. I cranked it all the way to the left, and it improved it's skip resistance some. More importantly, it greatly decreases the time to recover from a skip. Before it would take about 2 seconds from a bump. Now, maybe 1/10 of a second.
Hope this is of help to someone.
(-:Stephonovich
EDIT: Had to add "_" to move + to neccesary positions.
