Philips CD850 MK1 skipping on some CDs

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richtoy
Berichten: 3
Lid geworden op: wo dec 27, 2017 8:59 pm

Philips CD850 MK1 skipping on some CDs

Berichtdoor richtoy » zo mei 13, 2018 8:41 pm

Hi,

I have a Philips CD850 MK1 that skips and skates on CDs that play fine in other players. Brand or very clean CDs play OK. I changed some "out of value/high esr" axial caps on the main board and that improved the situation slightly but the problem persists, slightly dirty CDs that play fine in all other players skip in the CD850.

Can anyone suggest where else I could look? PSU voltages are all ok.

Thanks!

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bramjacobse
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Lid geworden op: vr aug 22, 2014 9:02 am
Locatie: Almere-Haven
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Re: Philips CD850 MK1 skipping on some CDs

Berichtdoor bramjacobse » ma mei 14, 2018 6:55 am

Hi Richtoy,

very carefully clean the laser lens
Did you replace capicitors 2521 (47uF ) lasersupply.

Afbeelding

Check for bad, cold & cracked solder joints

Gr Bram

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bramjacobse
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Re: Philips CD850 MK1 skipping on some CDs

Berichtdoor bramjacobse » ma mei 14, 2018 10:54 am

Also check the disc-clamper , there could be a dent under the ball-bearing

Possible small dent at red dot.
Afbeelding

Regards Bram
Laatst gewijzigd door bramjacobse op ma mei 14, 2018 3:12 pm, 1 keer totaal gewijzigd.

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movieman
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Lid geworden op: ma mar 17, 2008 10:42 pm
Locatie: Zuid-Limburg

Re: Philips CD850 MK1 skipping on some CDs

Berichtdoor movieman » ma mei 14, 2018 11:38 am

You could put some new grease under the clamper as well...

The small axial electrolytic capacitors often cause malfunctions in these players. Bad solder joints are most likely to be found in the PSU: voltageregulators, diodes, resistors.

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bramjacobse
Berichten: 721
Lid geworden op: vr aug 22, 2014 9:02 am
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Re: Philips CD850 MK1 skipping on some CDs

Berichtdoor bramjacobse » zo mei 27, 2018 9:19 am

Hello richtoy,

Any luck, did you fix the problem..?

Regards Bram


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