Yamaha CDX-396 Manual page 12

CDX-396/496
2) Troubleshooting from System Malfunctions
a) Tray fails to come out/go in.
YES
Tray starts to
move but stops.
NO
Is output
YES
available at LOADING
terminal?
NO
YES
FLSW = L
NO
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.
b) No sound generated, Sound cut during play.
( but time display advances properly)
YES
MUTING applied.
NO NO
IC3 or IC200 defective.
11
Poor mechanism
operation.
Wire caught.
Loose gear, etc.
Motor defective.
Microcomputer or
LOADING IC (IC2)
defective.
MUTING circuit defective.
Microcomputer defective.
c) Operates as if no disc loaded. (although loaded)
Does tray NO
Poor tray loading.
load properly?
YES
Is pick-up at
NO
Feed limit switch defective.
innermost position?
YES
NO
Is FOCUS FOCUS servo
system defective.
lock done?
YES
NO
Does spindle Spindle servo
motor run? system defective.
YES
NO
Is EFMI signal
Jitter defective.
normal?
YES
IC3 defective.
Microcomputer defective.
d) Sound skips.
(Time display fails to advance properly)
Is disc dirty,
YES
scratched or
warped?
NO
Is disc or disc
YES
stabilizer in contact with
mechanism?
NO
Tracking servo system defective.
FEED servo system defective.
FOCUS servo system defective.
Pick-up defective.
e) No search provided. (Sound skipped after search)
Is disc dirty,
YES
scratched or
warped?
NO
Tracking servo system defective.
Is TER YES
FEED servo system defective.
waveform normal?
FOCUS servo system defective.
Pick-up defective.
NO
IC3 defective.
Check by using a
known good disc.
Poor mechanism
accuracy.
Floating rubber/
spring deformed.
Pick-up connector
assembly caught.
Check by using a
known good disc.