Philips CD100 Help needed

figge77 · 2nd July 2009, 10:49 PM

Im trying to fix a broken cd100
when got the player i hooked it up it had like 70% distortion in one channel en the other was dead.
so i thought a change of the elecrtolytics was in order. but to my suprise nothing happend, same problem remains.
ok so started poking around and i started to suspect the M4551 chip, its equal to saa7030 right? it gets hot like hell and i believe its a short between gnd and pin leading to dac on the dead channel....dont have the thing infront of me at the moment so i cant say pin numbers

only way to get one of those is to find yet another player an trash it ?

poynton · 3rd July 2009, 07:51 AM

Have you checked all the voltages to make sure they are correct ?

A dead channel is usually a stuck output relay - check by shorting .

Andy

figge77 · 3rd July 2009, 04:47 PM

i will check the relays but i think the problem is before the 1540´s
the voltages out of psu seem ok. and on the board where the dacs lives.
but i will check again when i get to the shop.

2nd July 2009, 10:49 PM	#1
figge77 diyAudio Member Join Date: Apr 2009	Philips CD100 Help needed Im trying to fix a broken cd100 when got the player i hooked it up it had like 70% distortion in one channel en the other was dead. so i thought a change of the elecrtolytics was in order. but to my suprise nothing happend, same problem remains. ok so started poking around and i started to suspect the M4551 chip, its equal to saa7030 right? it gets hot like hell and i believe its a short between gnd and pin leading to dac on the dead channel....dont have the thing infront of me at the moment so i cant say pin numbers only way to get one of those is to find yet another player an trash it ?

3rd July 2009, 07:51 AM	#2
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	Have you checked all the voltages to make sure they are correct ? A dead channel is usually a stuck output relay - check by shorting . Andy __________________ If it ain't broke, break it !! Then fix it again. It's called DIY !

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3rd July 2009, 04:47 PM	#3
figge77 diyAudio Member Join Date: Apr 2009	i will check the relays but i think the problem is before the 1540´s the voltages out of psu seem ok. and on the board where the dacs lives. but i will check again when i get to the shop.

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