Arm lift problem with Sony PS-lx5

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When I press the start button. platter starts to rotate, and arm starts to lift off rest, then it seems to jam and platter stops turning. I can use it manually and it will lift at the end of record fine, and return to the rest position smoothly. It then seems to jam as it starts to descend to the final position, and stopping the platter before the cycle is complete. It is not sensors platter rotation can't produce enough torque to finish or start the operation. Platter maintains good speed when played manually.

Thank you for your help
Joseph Merriam
 
Thank you sir for answer. I cleaned the upper cam and any sticky leavers and such. As I looked further I looks like someone was in this unit and assembled it out of whack. The manual shows a timing step, but i can not set it that way. It involves what I will call the arm drive plate. This plate has a slip clutch so if the arm is locked down it will go through full cycle without breaking anything. That arm is in the wrong quadrant and I have to take the stack apart to set it like the picture. I read your stuff all the time and have learned a lot from your posts. I also want you to know that Americans are not all nasty inconsiderate people.
 
I have managed to get the arm index side of this table working. In the process I have managed to change where the arm pick-up occurs, so it has to be 1/4" into the label before it does. The manual has no adjustment for pick-up at the end of record, that I can see.
 
Does it still drop the stlus in the right place?
I had a simpler Sony turntable a while ago that I had to dismantle to clean off old sticky grease. The cam on the bottom of the arm was on splines and I managed to get it 1 spline off when reassembling; it did take a while to realise the error but all was eventually sorted.

Good Luck
 
Thank you all for your information and suggestions. The gooey grease was the main problem. Once I cleaned it out and lubed it with a light lithium grease, it started working.
The second problem occured when I loosened the set screw on the plastic cam arm actuator on the tone arm. I marked where it was before I took it apart, but it is very critical where it goes back, so it was pushed in about 1/4" at the head shell and it would not trigger, until the stylus was over the label. All is well now, except one hell of a lot of acoustic feed back from the hollow plastic case. I will some portland cement today, unless you all have a better Idea.

Joseph Merriam
 
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