Audio Output - LG XV-BD212 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
6. NO AUDIO OUTPUT
Optical function
YES
IC201
pin6 OPT_IN signal
OK?
YES
IC201
pin27 ~ 29 I2S signal
OK?
YES
IC401
pin23, 24, 26, 27, 29, 30
signal OK?
YES
CN401
pin13, 14, 15 signal
OK?
YES
Update new μ-COM firmware.
Portable function
YES
CN2A1
pin1, 3 PORTABLE R/L
OK?
YES
IC401
Pin23, 24, 26, 27, 29, 30
signal OK?
YES
CN401
pin13, 14, 15 signal
OK?
YES
Update new μ-COM firmware.
NO
Check JK203 or replace.
NO
Check IC201 or replace.
NO
Check IC401 or replace.
NO
Check IC404 or replace.
NO
Check CN3U1, JK3U2.
NO
Check IC401 or replace.
NO
Check IC404 or replace.
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