Philips CdM-2/10 low HF signal - diyAudio
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Old 23rd December 2013, 11:40 PM   #1
diyAudio Member
Join Date: Dec 2013
Default Philips CdM-2/10 low HF signal

Hi all.

I'm currently working on a B&O Beocenter 9000 which has a Philips CDM-2/10. There is a common problem that a capacitor has to be changed to a working one, so i replaced that cap. (worked on another CDM-2/10).

Unfortionaly it didn't work so i replaced a few other caps. None of it worked, there are also no cracked solder joints.

I've used my scope to measure the hf output on the servo board and it's only about 40-50mV. The service manual said i should use 1,5VPP.

Does anybody have a clue or something i should try or test?
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This is the board before i changed the caps.

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the HF output on 0,5uS.

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part of the service manual.
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Old 24th December 2013, 01:15 AM   #2
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Join Date: Oct 2006
Replace those remaining four light blue axial electrolytic caps before you do anything else. They will be either currently bad or in the process of dying. Use Nichicons if you want to assure long term reliability.
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