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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
gary7's avatar
gary7
73 posts
 
Well, trying to decide what to do with my TT-101, I pulled it out to have another go at the eyelets. I especially paid attention to the ones around the VR646 & VR647 pots that adjust the quick stop. Put it back together and ran for several hours testing the stop button in both 33 & 45. Seems to be fine, for now. It actually is stopping better. Before the platter had some drift after I hit the stop button. Maybe.....for now.   https://www.youtube.com/watch?v=wIhIO7uoPY4
halcro's avatar
halcro
2,664 posts
 
You can’t complain about that Gary.....😘
best-groove's avatar
best-groove
843 posts
 
@gary7  

It seems an excellent result, plus the pot does not turn slightly backwards after the stop as I saw in several videos.  ;)
gary7's avatar
gary7
73 posts
 
Oh, I'm very happy this worked. My thinking is that one or more of the eyelets that involves the stop sequence from the 1st solder go-round did not get a good dose of solder and it finally started having intermittent control issues. The platter drift before was not too terrible, but now it comes to almost a dead stop. Very happy indeed.
best-groove's avatar
best-groove
843 posts
 
@gary7

does the selector work to display the rpm that is placed under the plate?
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