CDX-396/496
CDX-396/496
11
2) Troubleshooting from System Malfunctions
a) Tray fails to come out/go in.
NO
FLSW = L
NO
YES
YES
NO
YES
Tray starts to
move but stops.
Is output
available at LOADING
terminal?
Poor mechanism
operation.
Wire caught.
Loose gear, etc.
Motor defective.
Microcomputer or
LOADING IC (IC2)
defective.
Limit switch defective.
FEED servo system defective.
Microcomputer, IC1 or IC3 defective.
When tray fails to close completely
(when it stops midway)
[Corrective measure]
1) Turn ON the power and open the tray.
*
If it failed to open (head and tray contacting each other),
open it after removing the chucking unit.
2) Turn OFF the power and force the tray to go in fully and
close.
3) With the power turned ON, open and close the tray to
check if the tray close completely.
YES
NO
NO
MUTING applied.
IC3 or IC200 defective.
MUTING circuit defective.
Microcomputer defective.
b) No sound generated, Sound cut during play.
( but time display advances properly)
FOCUS servo
system defective.
YES
Is FOCUS
lock done?
IC3 defective.
Microcomputer defective.
YES
NO
Feed limit switch defective.
Does tray
load properly?
NO
YES
Is pick-up at
innermost position?
NO
Poor tray loading.
Jitter defective.
YES
Is EFMI signal
normal?
NO
Spindle servo
system defective.
YES
Does spindle
motor run?
NO
c) Operates as if no disc loaded. (although loaded)
NO
YES
NO
YES
Is disc dirty,
scratched or
warped?
Is disc or disc
stabilizer in contact with
mechanism?
Tracking servo system defective.
FEED servo system defective.
FOCUS servo system defective.
Pick-up defective.
Check by using a
known good disc.
Poor mechanism
accuracy.
Floating rubber/
spring deformed.
Pick-up connector
assembly caught.
d) Sound skips.
(Time display fails to advance properly)
YES
YES
NO
NO
Is disc dirty,
scratched or
warped?
Is TER
waveform normal?
IC3 defective.
Check by using a
known good disc.
Tracking servo system defective.
FEED servo system defective.
FOCUS servo system defective.
Pick-up defective.
e) No search provided. (Sound skipped after search)
