Sony PS-LX22 - too slow

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reinisb
Posts: 4
Joined: 16 Sep 2014 20:33

Sony PS-LX22 - too slow

Post by reinisb » 16 Sep 2014 21:46

Hi!

I have a Sony PS-LX22 and have always had a notion of it playing too slow. I finally checked and my guess was correct - every minute of material is being played over 61 seconds. I want to fix this. I did not find a free service manual online - perhaps someone has it? Nevertheless I opened the TT and there was a board with adjustable RV101, RV102, etc.

According to service manual of PS-LX20 (I guess it should be very similar in PS-LX22), I should connect a frequency counter (which I don't have) to pin and then adjust RV101 and RV102 to given frequency intervals.

My question is - can I simply turn the RV101/RV102 with a plastic spudger and try to get the correct speed by trial and error? Would it work like this? Is it safe and makes sense?

Thank you!
Attachments
LX22Board.jpg
An image of my PS-LX22 main board
(419.79 KiB) Downloaded 623 times
111.jpg
A cutout of a PS-LX20 (not PS-LX22) service manual
(161.01 KiB) Downloaded 612 times

reinisb
Posts: 4
Joined: 16 Sep 2014 20:33

Re: Sony PS-LX22 - too slow

Post by reinisb » 17 Sep 2014 14:15

Ok, so I fixed it - very happy!

1. Forget the service manual of PS-LX20 - it is not compatible with PS-LX22.
2. I printed a paper stroboscope and downloaded an awesome iOS app by Grappetite where I could insert 50Hz frequency (I live in the EU)and the flashlight would strobe at 50Hz. I gave it a shot and the stripes were going anti clock wise - so that's correct - too slow.
3. I inspected the notation on the other (green) side of the board - it turns out that RV105 is responsible for "MAIN SPEED". So by trial and error I adjusted the RV105 and voila - the lines on the paper stroboscope are frozen now - the speed is perfect. If I would've known how to do this in the first place, it would've taken me 10 minutes to fix it.
Attachments
2.jpg
RV105 "MAIN SPEED" side
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1.jpg
RV105 "MAIN SPEED" top
(448.27 KiB) Downloaded 593 times

reinisb
Posts: 4
Joined: 16 Sep 2014 20:33

Re: Sony PS-LX22 - too slow

Post by reinisb » 22 Sep 2014 11:08

And one last thing. Above the MAIN SPEED RV, there are two more RVs - namely RV106 and RV107. You can toggle them to additionally fine-tune speed. RV106 is for 33, and RV107 is for 45.

Pikey
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England
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Joined: 20 Feb 2013 21:11
Location: A Kentish man ...

Re: Sony PS-LX22 - too slow

Post by Pikey » 22 Sep 2014 22:53

Good to know, glad you got it sorted!

And thanks for reporting back with all the info ...

petergas
Posts: 1
Joined: 12 Dec 2013 09:22

Re: Sony PS-LX22 - too slow

Post by petergas » 18 Sep 2015 08:32

Thank you, Reinisb. I already had my friend´s PS-LX22 for reparation here, was slow too, and I did it so as you did. Thanks a lot!

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