Non spinning CD spinner

misreading error CXD2508 AQ

Component CD players won't spin the disc if there is no focus lock due to dirt, weak or dead laser, etc. If the focus coil hunts but doesn't stop, there may be no motor drive.

See the CD player repair guid. :)

--- sam | Sci.Electronics.Repair FAQ:

Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs.

Sam is right. Typically it will make 3 attempts for focus lock. If no lock, no spinning. I used to use the little Radio Shack remote control tester cards to see if there is any light coming out of the laser. But usually if it tries three times and quits you can replace the optics assembly. Scott

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I'd never realised there was a focus check before trying to spin up/ extract any data from CDs. I looked in a troubleshoot manual for a different make and model and flow chart is Does disc rotate - N Does pick up move - Y Is laser lit - Y Is there sound if disc rotated by hand - N ->Go to focus section

Not looked at further but flow chart continued

Focus section Does pulse waveform appear at FCSI on processor - N -> processor defective Does pulse waveform appear at FCSI on processor - Y - > Is Ramp waveform at FEO of

focus&tracking IC - N -> is there a ramp waveform at FSO focus&tracking IC - Y -> check motor/coil driver IC

-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on

Right, so I think it's saying that the disc isn't rotating because there is no focus.

This is asying that it's issuing the commands try to focus but the voice coil isn't doing anything.

Focus before spin isn't universal - portables may not wait, but people should resist the temptation to immediately blame a coil driver or coil if the disc doesn't spin.

--- sam | Sci.Electronics.Repair FAQ:

Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs.