CDX-E400
14
CDX-E400
2) Troubleshooting from System Malfunctions
a) Tray fails to come out/go in.
Microcomputer or
LOADING IC (IC302)
defective
NO
FLSW = “L”
Limit switch defective
FEED servo system defective
Microcomputer defective
NO
YES
Motor defective
Poor mechanism
operation
Wire caught.
Loose gear, etc.
Tray starts to
move but stops.
YES
NO
Is output
available at LOADING
terminal?
YES
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.
IC102 or IC4 defective
YES
NO
MUTING circuit defective
Microcomputer defective
MUTING applied.
b) No sound generated, Sound cut during play.
( but time display advances properly)
FOCUS servo
system defective
YES
Is FOCUS
lock done?
IC101 or IC102 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
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.
d) Sound skips.
(Time display fails to advance properly)
NO
IC102 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
e) No search provided. (Sound skipped after search)
Содержание CDX-E400
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