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SR838 running too fast - advice needed!

Yup, that's bent. The pickup is that circuit board opposite the bend in these photos. It will take some finesse to bend it back. There's enough room to work with it on the shaft so don't take it off. Go buy a Popsicle with two sticks. Eat the Popsicle then clean and dry the Popsicle sticks. Place the sticks on either side of the plate aligning it with the bend. Squeeze the sticks together tightly with pliers, make sure the sticks are still aligned with the bend and gently bend it back. You could use a couple of small binder clips to help hold the sticks in position.

- Pete
 
Thanks for taking the time to reply, Pete. I also found out that it takes much effort to turn the pitch control knob and the quartz lock button is sticky- it doesn't pop back up when you disengage. Would contact cleaner do the trick? Which brand do you recommend? :idea: I'm by nature quite clumsy and impatient but am willing to try anything at this point re the sticks :D I have zero tinkering skills and looking for a proper tech during these crazy times is out of the question. I will post updates every now and then. Thanks again! :)
 
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The sticky button is probably caused by something spilled on it. I wouldn't use contact cleaner around the plinth or any of the trim surfaces. It probably should be disassembled to see what is causing it to stick. This is a nice turntable, if you don't trust your "tinkering" skills, probably best to turn it over to a pro especially to get the chopper plate straightened. You really don't want to mess that up.

- Pete
 
LBPete said:
The sticky button is probably caused by something spilled on it. I wouldn't use contact cleaner around the plinth or any of the trim surfaces. It probably should be disassembled to see what is causing it to stick. This is a nice turntable, if you don't trust your "tinkering" skills, probably best to turn it over to a pro especially to get the chopper plate straightened. You really don't want to mess that up.

- Pete
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Okay, I've finally managed to flatten the raised portion of the wheel using Popsicle sticks and pliers without mangling the thing (Thanks, Pete!) :jump:
I was positive that would the trick, but no. Speed is still out of control, both in 33 and 45 :dunno: Am very tempted to try the contact cleaner route that somebody suggested in one of the threads here but want to know why it's a bad idea to use around the plinth? Will it permanently stain the piano black finish? The speed control knob takes a lot of effort before I can turn it and the quartz lock button is stuck, so I'm thinking Deoxit.
 
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just spotted the wheel, could the graduated indents around be cleaned. If you have a scope, then check to see if the IR pickup of the indents/teeth are clean and true..


oops: already considered if dirty.. check with scope on the pickup is still a good idea
 
_mano said:
just spotted the wheel, could the graduated indents around be cleaned. If you have a scope, then check to see if the IR pickup of the indents/teeth are clean and true..


oops: already considered if dirty.. check with scope on the pickup is still a good idea
Click to expand...
I don't know exactly what to look for in the pick up (sorry, mega noob when it comes to these things) but I I'll post a pic of the fixed wheel and pick up after work.:)
 
The bent wheel might have caused a speed wobble when it passed across the sensor but it wouldn't cause the speed to increase or decrease randomly. There is no easy fix here. It needs to be disassembled, cleaned and then diagnosed with an oscilloscope.

- Pete
 
Eprimitiv said:
why it's a bad idea to use around the plinth?
Click to expand...

IIRC those plinths are made of MDF or particle board with a black plastic shell. The contact cleaner is unlikely to damage the plastic (although even that's not worth the risk) but it would most likely damage the wood. Besides, if the controls are as sticky as your description seems to indicate it's unlikely you'll be able to clean them by using only an external spray. The good news is that the root problem may very well be in those controls but it sounds like they need to be removed, disassembled, cleaned, lubed, and then reinstalled.

Hopefully you can find someone local to help you with it. I have its little brother (636) so I know how nice those TTs are. It's definitely worth the investment to make it right.
 
Thanks for the input guys- I agree that it's time to look for a qualified tech. It would be absurd for me not to since I don't have the know-how when it comes to these things. My dad used to spend his days modding or repairing gear he would bring home from Japan in the late 70s up to the mid 80s. He would ask me to sit down and watch him "tinker" and would try to explain how things work. Guess I should've paid more attention! He would bring home Pioneer, Marantz, Akai, etc. but none of them stayed for long, except for the 'suis :king: Anyway, my challenge now is to find a really good tech. I appreciate all the input and will post once she is up and running again. To be continued! :beerchug:
 
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