Camb. Aud. CD4SE "no Disc" not spinning

[Bert72]

Camb. Aud. CD4SE "no Disc" not spinning

Hi,

I have a Cambridge Audio CD4 Special Edition. Recently it has been occasionally displaying a "No Disc" message and only recognising some discs. Now it will not recognise anything.

I have taken the lid off and had a look. The disc is being picked up and the laser lifts up 6 or 7 times but the disc will not spin.

Any suggestions as to what the problem could be.



Thanks.

 

[JohnW]

Hi Bert72,

Yes it sounds like your Lasers gone (CDM12.1) - the CD4SE is based upon Philips CD7 Digital Servo Chipset - there’s no adjustment, only laser power calibration on the Laser head itself - but from the systems you described - this will not help.

John

 

[sreten]

I had my CD4SE CD drive changed because of persistent skipping.

Cost £50 (I seem to remember) through Richer Sounds.

/sreten.

 

[danb1974]

Either laser gone for good; initial focus fails so the motor isn't event started, or motor/motor driver problem.

 

[Bert72]

Thanks for all the help!

is there a way to check to see if the motor works?

 

[Leolabs]

Try to the internal picture of it,see what we can do.

 

[Bert72]

I am sorry, i do not understand, could you please clarify.

thanks

 

[anatech]

Hi Bert,
Load a disc and give it a spin gently, with your finger. Disc motors generally go before lasers. Could be a flex cable problem as well.

-Chris

 

[Bert72]

Sorry to sound so stupid, but what exactly should i do? should i take the top off, have it all powered up then spin the disc manually?

Thanks for you help so far!

 

[Fidelity Audio]

Hi

Take the top off

Power up and watch the disc load.

eject the disc and then re insert it, just as the disc loads spin the disc clockwise. If it spins and you hear some hissing from the laser then your motor or motor circuit it faulty.

If there is no noise the laser has gone.

If the disc wont spin the disc plater may have dropped, just lift slightly with a small screw driver.

But it does look like the laser, the new laser comes part of the transport so you get a new motor and load switch.

 

[Fidelity Audio]

Also in reply to skipping with these lasers. Its usually caused by the grease on which the laser tracks back and forth goes hard. Usually caused by smoke.
Typical symptom is the player will skip more from cold as the grease is a little thicker

Clean it off, and apply a tiny bit of new grease and it should be sorted.

 

[Bert72]

Great, thanks for your help i will give it a try!

Regards

Bert