LG LAC-M5600, Service Manual

Page: 16 / 43

- 2-5 -
NO
YES
YES
4. USB awareness badness (Refer to FIG5, 6.)
USB connection
• Check power supply.
(IC301, IC302, PN301, CN702, CN703)
• Check USB memory.
• Check USB Circuit.
(IC509, IC511, CN701, CN702, PN503)
Normalcy operation
OK
When laser light.
B
When SPINDLE motor dose not turn
C
NO
NO
NO
NO
YES
YES
YES
YES
Laser lights?
Check the signal FOCUS
SEARCH of IC506 Pin .
(Refer to FIG1.)
Check the signal of IC504
Pins , .
(Refer to FIG1.)
Defective IC506
Defective IC506
• Degraded laser diode
• Defective PICK-UP
Defective IC506
Defective IC504
Defective contact PN501
or PICK-UP
Check the change for
SP +, SP –, Voltage
of IC504 Pins , .
(Refer to FIG3.)
Check the change for
SPDO Voltage
of IC506 Pin .
(Refer to FIG3.)
25
15 16
21
11 12