Cd Reading Check - LG CM1530 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

5. CD READING CHECK

Check connector locking
CN800 / CN803.
YES
Does sled motor move?
YES
Does the laser move?
YES
Does laser light?
YES
Does the spindle
motor rotate?
YES
Is reading OK?
Replace X800.
NO
Check CN803 pin3, 4 (SL-, SL+).
Check IC800 or IC801
VCC normal?
NO
Replace IC801.
NO
Check CN801 pin13, 16 (F+, F-).
NO
Check CN801 pin10 (LD).
NO
Check CN803 pin1, 2 (SP+, SP-).
NO
Check CN801 pin14, 15(T-, T+).
3-7
Normal.
YES
NO
Check IC801
pin22 "XOUT", pin23 "XIN"
signal.
YES
Defective
pick-up or IC800(pin11, 12),
NO
IC801 pin96 "F_DO",
pin97 "F_DI", pin98 "F_CS"
pin99 "F_CLK", pin100 "MRST"
signal.
NO
Check IC801 pin97 "F_DI",
pin98 "F_CS" signal.
NO
Replace IC802.
NO
Defective pick-up
or IC800, IC801.
NO
Defective pick-up
or Q801 circuit.
NO
Defective pick-up
or IC800, IC801.
NO
Defective pick-up
or IC800, IC801.