N Cook
Guest
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 Posted: Mon Sep 24, 2007 8:53 am Post subject: Basic CD player in a micro music centre |
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No movements or laser light , totally dead CD player. Just -- in the
display.
Function sw and door latch sw ok. Plenty of 5V etc supplies around on the
chippery. Crystal and ceramic resonator have oscillation.
All 4 channel motor/focus driver o/p at 3.8V, all 4 inputs at 2.1V, disable
is set off ie operational.
Pressing all sm chip leads , no change
Swapping laser and carrier/motors section with another one laying around,
the same zilch. No dodgy electrolytics.
Is there something obvious I'm overlooking ?
Not worth spending a lot of time on but a good customer for other stuff.
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/ |
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