CDC-585/CDC-506/CDC-685/CDC-906
CDC-585/CDC-506
CDC-685/CDC-906
18
d) Sound skips.
(Time display fails to advance properly)
c) Operates as if no disc loaded.
(although loaded)
Disc clamp defective.
Clamp switch defective.
Microcomputer defective.
YES
Does disc clamp
operate properly?
IC1 or IC3 defective.
Microcomputer defective.
YES
NO
Infrared sensor defective.
(D400)
Microcomputer defective.
Does table
rotate properly?
NO
YES
Is table position
sensor normal?
NO
Poor table rotation.
YES
Is FOCUS
lock done?
NO
YES
Is pick-up at
innermost position?
NO
Jitter defective.
Does spindle
motor run?
NO
YES
Is EFM signal
NO
Spindle servo system
defective.
Feed limit switch defective.
FOCUS servo system
defective.
NO
Tracking servo system defective.
FEED servo system defective.
FOCUS servo system defective.
Pick-up defective.
Is disc dirty,
scratched or
warped?
YES
NO
Is disc or disc
stabilizer in contact with
mechanism?
YES
Check by using a
known good disc.
Poor mechanism
accuracy.
Floating rubber/spring
deformed.
Pick-up connector
assembly caught.
e) No search provided.
(Sound skipped after search)
NO
IC1 or IC3 defective.
Is disc dirty,
scratched or
warped?
YES
NO
Is TER
waveform normal?
YES
Check by using a known
good disc.
Tracking servo system defective.
FEED servo system defective.
FOCUS servo system defective.
Pick-up defective.
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