CDC-E500
CDC-E500
26
■
TROUBLESHOOTING
<Data cannot be read>
TRACKING servo defective.
FEED servo defective.
Pick-up defective.
Check by using another disc.
Is disc dirty or
scratched?
YES
NO
Pick-up position
Within disc range
Outermost
(on mirror
surface)
Pick-up defective.
Spindle servo defective.
VCO defective.
(Motor fails to run, etc.)
<Operates as if no disc loaded. (although loaded)>
MECH drive defective.
NO
YES
Is Pick-up at
innermost position?
Feed limit switch defective.
NO
YES
Is FOCUS
lock done?
Focus servo system defective.
NO
YES
Does spindle
motor run?
Spindle servo system defective.
NO
YES
Is EFM signal
normal?
YES
<No sound generated, Sound cut during play.>
(but time display advances properly)
MUTING circuit defective.
Microcomputer defective.
MUTING applied.
YES
Jitter defective.
VCO defective.
NO
Motor drive defective.
MECH defective.
NO
NO
IC202 or IC207 or IC208
defective.
IC1 or IC202 defective.
Microcomputer defective.
Microcomputer defective.
<Focus drops>
TRACKING servo defective.
FEED servo defective.
Pick-up defective.
Check by using another disc.
Is disc dirty or
scratched?
YES
NO
Pick-up position
Within disc range
Outermost
(on mirror
surface)
FOCUS servo defective.
Pick-up defective.
<Sound skips. (Time display fails to advance properly)>
Poor Mechanism.
Floating rubber, Pick-up connector,
etc.
Check by using a known good disc.
Is disc dirty or
scratched or
warped?
YES
NO
NO
YES
Tracking servo system defective.
FEED Servo system defective.
FOCUS servo defective.
Pick-up defective.
<MECH abnormal operation>
SW (Ex, Home, Carriage,
OP/CL, FWD, RVS) or SW
circuit defective.
Is operation
speed normal?
YES
Is SW logic correct?
YES
NO
<No search provided. (Sound skipped after search)>
TRACKING servo system defective.
FEED servo system defective.
FOCUS servo system defective.
Pick-up defective.
Check by using a known good disc.
Is disc dirty or
scratched or
warped?
YES
NO
Is TER waveform
normal?
NO
YES
IC200 or IC202 defective.
Does MECH
(DRAWER, CLAMP,
CARRIAGE) operate
normaly?
Is disc or disc
stabilizer in contact
with mechanism?
Содержание CDC-E500
Страница 5: ...CDC E500 CDC E500 5 REAR PANELS U C models A model ...
Страница 23: ...CDC E500 CDC E500 23 TIMING CHART ...