Read LG 50PH6710-TD (CHASSIS:PA32B) Service Manual online
4. Analog TV Video Trouble Shooting(DVB)
Check RF Cable
Y
N
Check Tuner(TU6502) Power
(3 3V 1 8V)
(3 3V 1 8V)
Replace one of Bead
& R h k
& R h k
Pin No.
Description
1
RF_S/W_CTL
2
RESET
3
SCL
Check CVBS Signal
TU6502 #8 Pin
TU6502 #8 Pin
N
Y
(3.3V, 1.8V)
& Recheck
Maybe Tuner(TU6502) has problems
3
SCL
4
SDA
5
3.3V
6
SIF
7
1.8V
8
CVBS
Y
Check CVBS Signal
Q6501 Base
Q6501 Base
N
Replace one of
Q6501 Base
& Recheck
Q6501 Base
& Recheck
Y
8
CVBS
9
IF_AGC
10
IF_P
11
IF_N
12
NC
13
NC
Maybe LGE2122 (IC105)
has problems
has problems
Pin #1
Pin #12
Pin #13
Pin #27
Pin #15
13
NC
14
NC
15
GND
16
NC
17
NC
18
NC
Checking order
1 Check Tuner power (Pin #5 #7)
Pin #13
18
NC
19
NC
20
NC
21
NC
22
NC
23
NC
1. Check Tuner power (Pin #5, #7)
2. Check Tuner I2C level (Pin #3, #4)
3. Check Video signal (Pin #8)
2. Check Tuner I2C level (Pin #3, #4)
3. Check Video signal (Pin #8)
23
NC
24
NC
25
NC
26
NC
27
NC
57
LNA_CTRL_1
_
_
58
LNA_CTRL_2
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