LG CJS98F - Page 58

3-29
ELECTRICAL TROUBLESHOOTING GUIDE
CD FUNCTION
Check FFC cable
to CN400, CN401.
Is Motor_open/ close OK?
(IC400 pin6, 7)
Check IC400.
MON_MPD(CN400 pin22)
About 180 mV?
Check IC501.
Check loading motor.
Check IC501.
OPU driving
(Focusing & Tracking) OK?
Check OPU.
(Pick-up module)
Is motor impedance
about 12 Ω?
IC401 pin34 ~ 36
I2S output signal OK?
Can
disc insert?
IC501 pin N1, N2, N4
I2S input signal OK?
Disc reading OK?
NO
NO
NO
NO
NO
NO
NO
NO
NO
IC401
RF & Servo signal
OK?
Focusing/
Tracking/ Sled signal
OK?
LOAD +, - OK?
YES
YES
YES
YES
YES
NO
YES
YES
YES
A
3. NO AUDIO CHECK