LG S35A1-W Service Manual

3-12
ELECTRICAL TROUBLESHOOTING GUIDE
Function transformation
to OPT
Function transformation
to PORT Insert AUDIO line
Replace the JK502(OPT)
Check if IC400 pin13, 14
Is there a signal input?
Check if IC400 pin3, 4
voltage is ok(3.3 V, 5 V)?
Check if IC400 pin6~9
(MCLK, LRCK, DATA, BCK)
Replace the IC400
Check if CON502 is ok?
Replace the JK504
Check the POWER PART.
Check the OPT line,
Changing the OPT Equipment
Check if JK504 det.pin
voltage is ok(0 V)?
Does it output
audio?
Does it output
audio?
Check if JK502
voltage is ok(3.3 V)?
NO
NO
NO
NO
NO
NO
NO
Check the OPT
the input signal
Check if MCL3730
pin4 “H”
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
B
TEST END.

LG S35A1-W Specifications

General

Brand	LG
Model	S35A1-W
Category	Speaker System
Language	English