Philips CD960 - focus error ?

Ezalor · 25th November 2006, 01:20 PM

Hello,
This morning i've got a Philips CD960 for just €10 from a garage sale. It was exposed to rain and i guess was not treated well at transport.

At home, the only fault was the little sluggish CD slide; after cleaning and lubrication it worked. I've played two tracks and it worked just fine. Unfortunately I carefully cleaned the dirty inside (full of dog hairs) with compressed air. I tested again and the playback suddenly stopped with "error" in the display. The cd and the drive was full of dog hairs, which i removed one by one.

After that incident, the CD wouldn't even spin up, just the laser lens is moving up and down a few times, after that the display shows "error" again. The laser works, I think, there's a red dot visible inside.

I've searched the Internet and followed the steps here:

http://getmanual.ru/indexnew.htm
audio >> service bulletins >> CD91 - CDC263
SYMPTOM: NO FUNCTION - gives error - no focus - no T.O.C.

and here:

http://www.repairfaq.org/sam/cdfaq.htm#cdsup

I'm helpless. Please help me!

PS: And yes, i've searched the forum...

poynton · 25th November 2006, 03:08 PM

Hi.

As it did work until you used an air jet, it is possible that the laser needs cleaning.

Use a cotton bud with a little alcohol ( meths or gin/vodka) to carefully wipe the laser lens.

It may also be possible that you blew dirt/hair into the laser head. Carefully inspect.

Another possibility is that dirt is preventing the head from returning fully to the centre. Remove ALL traces of grease/ lubrication.

Andy

EDIT :- Also check and reseat all cables and connectors.

Ezalor · 25th November 2006, 03:19 PM

I've tried all of this. I used a mild window cleaner. Now, after a few hours of power on, the lens appears to get in focus position and the cd spins up, the audio relais clicks. but then it aborts and the "error" message shows again.

As I figured out, it is an CDM 1 Mk 2 module. but that won't help me so far.

Maybe it is a control electronics error.

PS: I demonted the laser/prism unit to look for dirt in the inside of the optics. But I can turn the unit in the socket, so i hope that I fixed it in the right position now.

poynton · 25th November 2006, 03:57 PM

Quote:

Originally posted by Ezalor
.............. I demonted the laser/prism unit to look for dirt in the inside of the optics. But I can turn the unit in the socket, so i hope that I fixed it in the right position now............

What exactly did you do ??

Andy

Ezalor · 25th November 2006, 04:02 PM

As far as I "may not" edit my post, i have to double-post.

I will check all connectors. I figured out that if i pull and push the laser/mirror unit back and forth (while turned off for sure) there are certain points where the laser appears to get the focus, the disk spins up and the head seeks like mad for the TOC. The motor makes high-pitched noises, as if the controler can't find the right speed.

poynton · 25th November 2006, 04:27 PM

Did you remove the laser unit from the carrier ??

If so, you will have to reset the angles carefully.

I only have the service manual for the CDMs in paper format and cannot scan in at the moment.

The manuals can be obtained from CAS via EBAY or service@cas-germany.com (+49) 02065 959085

Andy

Ezalor · 25th November 2006, 04:41 PM

It is possible to loosen the cylindric laser/mirror unit, so that it can be moved in the "tube".

poynton · 25th November 2006, 05:44 PM

Quote:

Originally posted by Ezalor
It is possible to loosen the cylindric laser/mirror unit, so that it can be moved in the "tube".

You will have to readjust the unit.

Andy

Ezalor · 25th November 2006, 05:50 PM

...so I need the service manual for A CDM1Mk2 or the CD960. Right?

I have the standard tools for playing around with electronics plus an oscilloscope. Is this sufficient to do the adjustment?

PS: For strange reason, one time it started playing a (well pressed, new) CD. With any other I have, once again, no chance.
At least this is the evidence that the rest of the electronics should work somewhat properly.

Thanks for your help sop far.

poynton · 25th November 2006, 06:35 PM

Quote:

Originally posted by Ezalor
...so I need the service manual for A CDM1Mk2 or the CD960. Right?

I have the standard tools for playing around with electronics plus an oscilloscope. Is this sufficient to do the adjustment?

PS: For strange reason, one time it started playing a (well pressed, new) CD. With any other I have, once again, no chance.
At least this is the evidence that the rest of the electronics should work somewhat properly.

Thanks for your help sop far.

Philips service manuals do not have details of the CDM. These are in individual manuals.

Andy

25th November 2006, 01:20 PM	#1
Ezalor diyAudio Member Join Date: Nov 2006	Philips CD960 - focus error ? Hello, This morning i've got a Philips CD960 for just €10 from a garage sale. It was exposed to rain and i guess was not treated well at transport. At home, the only fault was the little sluggish CD slide; after cleaning and lubrication it worked. I've played two tracks and it worked just fine. Unfortunately I carefully cleaned the dirty inside (full of dog hairs) with compressed air. I tested again and the playback suddenly stopped with "error" in the display. The cd and the drive was full of dog hairs, which i removed one by one. After that incident, the CD wouldn't even spin up, just the laser lens is moving up and down a few times, after that the display shows "error" again. The laser works, I think, there's a red dot visible inside. I've searched the Internet and followed the steps here: http://getmanual.ru/indexnew.htm audio >> service bulletins >> CD91 - CDC263 SYMPTOM: NO FUNCTION - gives error - no focus - no T.O.C. and here: http://www.repairfaq.org/sam/cdfaq.htm#cdsup I'm helpless. Please help me! PS: And yes, i've searched the forum...

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25th November 2006, 03:08 PM	#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!)	Hi. As it did work until you used an air jet, it is possible that the laser needs cleaning. Use a cotton bud with a little alcohol ( meths or gin/vodka) to carefully wipe the laser lens. It may also be possible that you blew dirt/hair into the laser head. Carefully inspect. Another possibility is that dirt is preventing the head from returning fully to the centre. Remove ALL traces of grease/ lubrication. Andy EDIT :- Also check and reseat all cables and connectors.

25th November 2006, 03:19 PM	#3
Ezalor diyAudio Member Join Date: Nov 2006	I've tried all of this. I used a mild window cleaner. Now, after a few hours of power on, the lens appears to get in focus position and the cd spins up, the audio relais clicks. but then it aborts and the "error" message shows again. As I figured out, it is an CDM 1 Mk 2 module. but that won't help me so far. Maybe it is a control electronics error. PS: I demonted the laser/prism unit to look for dirt in the inside of the optics. But I can turn the unit in the socket, so i hope that I fixed it in the right position now.

25th November 2006, 04:02 PM	#5
Ezalor diyAudio Member Join Date: Nov 2006	As far as I "may not" edit my post, i have to double-post. I will check all connectors. I figured out that if i pull and push the laser/mirror unit back and forth (while turned off for sure) there are certain points where the laser appears to get the focus, the disk spins up and the head seeks like mad for the TOC. The motor makes high-pitched noises, as if the controler can't find the right speed.

25th November 2006, 04:27 PM	#6
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!)	Did you remove the laser unit from the carrier ?? If so, you will have to reset the angles carefully. I only have the service manual for the CDMs in paper format and cannot scan in at the moment. The manuals can be obtained from CAS via EBAY or service@cas-germany.com (+49) 02065 959085 Andy

25th November 2006, 04:41 PM	#7
Ezalor diyAudio Member Join Date: Nov 2006	It is possible to loosen the cylindric laser/mirror unit, so that it can be moved in the "tube".

25th November 2006, 05:50 PM	#9
Ezalor diyAudio Member Join Date: Nov 2006	...so I need the service manual for A CDM1Mk2 or the CD960. Right? I have the standard tools for playing around with electronics plus an oscilloscope. Is this sufficient to do the adjustment? PS: For strange reason, one time it started playing a (well pressed, new) CD. With any other I have, once again, no chance. At least this is the evidence that the rest of the electronics should work somewhat properly. Thanks for your help sop far.

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