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Only for training and service purposes
LGE Internal Use Only
Make sure you can’t hear any audio
Y
Check Connector P800
N
Y
Y
Check Speaker
Replace Connector
Check Signal
L801, L802, L803, L804
N
Replace one of
Capacitor, Register
& Recheck
Y
Check IC800 Power
17V, 3.3V
N
Replace It & Recheck
Y
Check BCM2112 I2S Output
AR800
N
Replace It & Recheck
Y
Maybe MTK5369 (IC100)
has problems
Replace Speaker
N
N
Maybe STA368 has problems.
Replace It
9. All Source Audio Trouble Shooting
Summary of Contents for 42PM4700
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