Read LG 50PH670S-ZD (CHASSIS:PD32A) Service Manual online
8. All Source Audio Trouble Shooting
Make sure you can’t hear
any audio
any audio
Y
Check Speaker
N
N
di ?
Replace Speaker
N
Check Connector P3801
No audio?
No audio?
N
Y
No audio?
Replace Connector
p
p
Replace one of Resistor /
Capacitor & Recheck signal
Capacitor & Recheck signal
Y
Check Signal at Coil
L3802, L3803, L3804,
L3805
Is there any pulse signal?
L3802, L3803, L3804,
L3805
Is there any pulse signal?
N
Replace one of Coil
L3802, L3803, L3804,
L3805
& Recheck signal Î ok?
L3802, L3803, L3804,
L3805
& Recheck signal Î ok?
Check IC3801 Power
OK
(17V : C3821,
3.3V : C3805)
OK
(17V : C3821,
3.3V : C3805)
Follow Power UP_Boot Fail
trouble shooting guide
N
Capacitor & Recheck signal
Î ok?
Î ok?
Resistor : R3810, R3811,
R3812, R3813
Capacitor : C3810, C3811,
C3814, C3815
C3817 ~ C3825
R3812, R3813
Capacitor : C3810, C3811,
C3814, C3815
C3817 ~ C3825
N
Y
N
Y
C3817 C3825
Replace It & Recheck
Y
Y
Y
Check Main IC I2C / I2S
signal out put with user
menu volume up/down test
signal out put with user
menu volume up/down test
N
Maybe MTK IC LGE2122 (IC105)
has problems
Replace it
has problems
Replace it
Maybe Audio Digital AMP has
problems. (IC3801, STA380BWF)
Replace It
problems. (IC3801, STA380BWF)
Replace It
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