Sony PS-LX500 speed adjust, How?

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Fast one
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Joined: 07 Sep 2019 22:44

Sony PS-LX500 speed adjust, How?

Post by Fast one » 10 Sep 2019 18:56

I downloaded the service manual but it doesn't explain how to adjust the turntable speed. Does anyone know the procedure and what trimmers are for doing this? There are two adjustments for gain (RV101 and RV102) and two adjustments for offset (RV103 and RV102) with a lot of voltages in red shown on the schematic. Nothing is explained on how to adjust speed.

Coffee Phil
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Re: Sony PS-LX500 speed adjust, How?

Post by Coffee Phil » 11 Sep 2019 00:36

Hi Fast One,

I looked in the library on this site. There is just an owners manual. No service manual. It has no mention of speed adjustment or if it is quartz locked. Those adjustments may be for the arm servo. Can you give a link to your manual. That may give some insight.

Phil

Fast one
United States of America
Posts: 2
Joined: 07 Sep 2019 22:44

Re: Sony PS-LX500 speed adjust, How?

Post by Fast one » 11 Sep 2019 14:57

I used the one for the PS-LX510, after looking through it again there is a a page with a complicated procedure that appears to be for speed adjustments. An ocilloscope, voltmeter, and dc power supply are used to set a 4 volt PP clean waveform and that seems to provide a correct turntable speed or speeds. It couldn't be more complicated or vague.

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