Read LG 50PM6700-TK (CHASSIS:PA22A) Service Manual online
Check RF Cable
Y
Maybe MTK2112(IC100)
has problems
Check Tuner(TU1002-1 Power
(3.3V, 1.8V, 1.23V)
N
Replace one of Bead
& Recheck
Y
Check IF Signal pin #10,11
N
Maybe Tuner has problems
Y
3. Digital TV Video Trouble Shooting
Pin No.
Description
1
NC_1
2
RESET
3
SCL
4
SDA
5
3.3V
6
SIF
7
1.8V
8
CVBS
9
T/C_IF_AGC
10
T/C_DIF[P]
11
T/C_DIF[N]
12
NC_2
13
NC_3
14
NC_4
15
GND_1
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
D0
21
D1
22
D2
23
D3
24
D4
25
D5
26
D6
27
D7
28
GND_2
29
GND_3
30
1.23V
31
S2_RESET
32
3.3V
33
S2_F22_OUTPUT
34
S2_SCL
35
S2_SDA
36
LNB
37
GND_4
Checking order
1. Check Tuner power (Pin #5, #7)
2. Check Tuner I2C level (Pin #3, #4)
3. Check Tuner IF Signal (Pin #10, #11)
2. Check Tuner I2C level (Pin #3, #4)
3. Check Tuner IF Signal (Pin #10, #11)
5. Check Ts Signal
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