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JVC TT-101 Won't Stop

The Stop button on my recently purchased QL-10 doesn't work. It worked at first after the TT warmed up, but then quit completely. I since have replaced all 37 electrolytic caps on 3 boards, but it made no difference. The power voltages are correct. The button itself is fine and shorts pins 6 and 9 of the P8 connector on the main board, but the motor doesn't stop. What could be wrong? Any particular transistor or adjustment? Please help! -Alex
safesphere
totem395
390 posts
 
I always found the run and hold functions a strange function
to include and have left mine on the hold also.
gary7's avatar
gary7
73 posts
 
Question. Since the adjusting of the quick stop, as per the SM, requires using records to add weight to calibrate, would using a record weight throw this off?
best-groove's avatar
best-groove
843 posts
 
@gary7     


did you take pictures at the points where you intervened to get a good repair?
gary7's avatar
gary7
73 posts
 
Hard to get a good pics as the eyelets are small, silver bumps of solder. Some you really have to hunt for.  If not mistaken, the SM on vinylengine has a schematic of the board that shown the eyelets connecting points in dark grey, you can use it to map them out.

https://www.facebook.com/photo.php?fbid=2270251446319444&set=a.185305328147410&type=3&th...
best-groove's avatar
best-groove
843 posts
 
@gary7 what is SM? You have also replaced cables?  I notice that some seem new or fairly recent.


I would like to delete all the wiew wrap contacts and connect pins with contacts to detach; this would facilitate further maintenance by excluding all the tangle of cables.
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