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TROUBLESHOOTING GUIDE
PLUG IN
Is Power LED light?
YES
Check fuse F101
YES
FUSE DEFECT
CHECK SMPS CIRCUIT NORMAL?
NO
NO
NO
YES
IS OSCILLATOR CIRCUIT OSCILLATING?
NO
IS POWER TURNED
ON?
NO
CHECK FUSE
FC201,FC202,FC203,
FC204,FC205
YES
NO
CHECK POWER CIRCUIT
NORMAL?
YES
NO
POWER SUPPLY
PATTERNS OPEN
YES
Can Tray be opened?
NO
Is there open/close key signal
input?IC206 PIN58,59
NO
LOADER SWITCH DEFECTIVE
or
PATTERN AND CONNECTOR OPEN
YES
CHECK OPEN/CLOSE SIGNAL AT IC206
PIN58 PIN 59
TRAY OPEN H
L
TRAY CLOSE L
H
NO
MICROPROCESSOR IC206
DEFECTIVE
YES
IS LOADING MOTOR DRIVER CIRCUIT
OPERATION NORMAL?
YES
MOTOR DRIVER
U202 DEFECTIVE
LOADING MOTOR AND LEAD WIRE DEFECTIVE
OR LOADING PART OF MECHANISM DEFECTIVE
YES
Does initial reading occur?
NO
NO
Check laser light?
NO
Does lens move up and down?
NO
Check focus
signal output?
NO
YES
IC3 DEFECTIVE
Check connector
or pickup.
YES
Check laser
circuit correct?
YES
CONNECTION OR
PICKUP DEFECTIVE
YES
RF signal output?
YES
FEED MOTOR OR
WIRING DEFECTIVE
NO
IC3
DEFECTIVE
YES
SMPS PATTERNS OPEN
CRYSTAL X201 DEFECTIVE
Can disc be played?
NO
Check tracking servo
circuit correct?
NO
Servo IC701,IC703 DEFECTIVE
YES
Check disc or mechanism and connector
YES
Can Tray be closed?
YES
NO
Can USB device be
read?
Check USB power supply normal?
YES
Check USB Device and connector.
NO
NO
U11,IC1 DEFECTIVE
YES
Is audio output
correct?
NO
Is power supply normal?
CHECK CLOCK PULSE AT PIN60 OF IC701
CHECK OUTPUT PULSE AT PIN34,35,36 OF IC701
CHECK OUTPUT SIGNAL AT PIN16,17 OF U209
CHECK OUTPUT SIGNAL AT PIN1,7 OF U210,U211
CHECK MUTE CIRCUIT Q210,Q211,Q212,Q213
LINE OUT PLUG OR PATTERNS DEFECTIVE
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
CHECK POWER SUPPLY PATTERNS
IC701/X702 DEFECTIVE
IC701 DEFECTIVE
U209 DEFECTIVE
U210,U211 DEFECTIVE
MUTE CIRCUIT DEFECTIVE
YES
OK
