LG CJS45F Service Manual

3-25
ELECTRICAL TROUBLESHOOTING GUIDE
9. CD FUNCTION
CD FUNCTION
Is Motor_open/close OK?
(IC400 Pin9,10)
Replace Cristal (X400).
Check loading motor.
Check IC400.
Check IC400
(Motor drive IC).
Is the MD(CN400 Pin7)
about 190 mV?
Check IM (pick-up).
IM driving
(Focus and tracking) is ok?
Check Vcc of IC401.
Replace IC500.
Check Cristal (X400).
Is Motor ok? (about 12 Ω)
Is no signal at spk?
Can the
disc insert?
Disc reading
is ok?
Check
the signal of IC401
Pin52,53,54.
Check IC500
input/output and
control line.
Check
the signal (16.9344
MHz) at IC401
Pin51.
Focus,
tracking, sled signal
is ok?
Is load +,- ok?
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
NO
Refer to function check.
jomi

LG CJS45F Specifications

General

Brand	LG
Model	CJS45F
Category	Stereo System
Language	English