Audio Systems/Pioneer PD-M603

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Expert: - 4/8/2009


Question
Hi, the 6pack cds go in and run through all but won't play any, says no disk. Can you help?

Answer
This can be an of the following:

ONE:  Dead or weak laser diode preventing any digital pickup from the disc.

TWO:  Optical pickup assembly badly out of alignment and focus also  preventing the pickup of the digital signal. Could even be the lens has fallen out of the pickup mechanism.

THREE: The servo mechanism inside the player is defective.

FOUR:  Broken motor or disc handling mechanism.

It must be looked at and analyzed by someone who can diagnose the details.

My guess would be number ONE. It is a very common cause.  A good diode will run for thousands of hours but some small percentage of them are only able to run a few hours before getting too weak to give a strong reflection off the disc.

Hope this helps.
C  

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Cleggsan

Expertise

Audio Design Engineer; systems, loudspeakers, cd/dvd players, etc. I am knowledgeable in all high end audio equipment and installations. MAKE SURE YOU GIVE A MAKE AND MODEL NUMBER AND CAR IF IT IS AN AUTO QUESTION. Note: I am getting some who ask good questions that take a lot of time to research but then the questioner fails to read the answer. Please don't ask questions unless you are seriously looking for an answer. If you find an answer to your question otherwise then let me know with your reply. Thank you.

Experience

Have been associated with audio design, standards, testing and component systems for over 40 years.

Organizations
Life Fellow Member of Audio Engineering Society Life Senior Member of Institute of Electronic and Electrical Engineers

Publications
Review technical manuscripts for IEEE Spectrum Write occasionally for high-end audio publications

Education/Credentials
BSEE/MSCS/MBA

Past/Present Clients
Past Employee/advisor to several well known audio products manufacturers

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