LG RH4820W, Service Manual

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3-5
Check IC201 power and
other circuits
Check IC702 power and
other circuits IC702 - 46: HIGH ?
( LOW: AUDIO MUTE )
IC201 - 1 : HIGH ?
RESET_Audio status)
IC201 – 8,9 :
I2C signal normal?
Check IC201 power and
other circuits
IC201 – 14,15,18,19
Check audio output
NO
NO
NO
NO
YES
Check IC309 power and
other circuits
Check
R120,R121,R122,R123
YES
YES
YES
5. When playing DISC ,no audio output
Check R112
NO
PN6701 - 2 signal normal?
Check FFC CABLE signal
flow
YES
6. No OPTICAL / DIGITAL output