Read LG 50PH670S-ZD (CHASSIS:PD32A) Service Manual online
10. Analog TV Audio Trouble Shooting
Follow procedure analog TV video
trouble shooting
trouble shooting
N
Check video output
Y
N
Check Tuner Power
(3 3V 1 8V)
(3 3V 1 8V)
Replace one of L6503/L6500
Check SIF Signal
At Tuner (TU65**, #6 Pin)
At Tuner (TU65**, #6 Pin)
N
It the Tuner TDSS-H501F?
Y
(3.3V, 1.8V)
& Recheck
N
Maybe Tuner(TU65**) has problems
Replace it
Replace it
Y
N
Replace one of
Q6500, R6516, R6518, R6515, C6522
& Recheck the signal
Q6500, R6516, R6518, R6515, C6522
& Recheck the signal
Y
Maybe Tuner(TU6504) has problems
Replace it
Replace it
Check DIF Signal
At Tuner (TU6504, #10, #11 Pin)
At Tuner (TU6504, #10, #11 Pin)
Y
N
Maybe LGE2122 (MTK Main IC,
IC105 ) audio block has problems.
Replace It
IC105 ) audio block has problems.
Replace It
Y
N
Maybe LGE2122 (MTK Main IC,
IC105 ) audio block has problems.
Replace It
IC105 ) audio block has problems.
Replace It
Replace one of
R345, R331, R380, R334, R336,
C312, C336m C337, C310
& Recheck the signal
R345, R331, R380, R334, R336,
C312, C336m C337, C310
& Recheck the signal
Replace it
Y
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