LG 60PH6700 Service Manual page 39

4. Analog TV Video Trouble Shooting(DVB)
Check RF Cable
Y
Check Tuner(TU6502) Power
(3.3V, 1.8V) (3 3V 1 8V)
Y
Check CVBS Signal
TU6502 #8 Pin
Y
Check CVBS Signal
Q6501 Base
Y
Maybe LGE2122 (IC105)
has problems
Checking order
1 Check Tuner power (Pin #5 #7) 1. Check Tuner power (Pin #5, #7)
2. Check Tuner I2C level (Pin #3, #4)
3. Check Video signal (Pin #8)
Copyright © 2013 LG Electronics Inc. All rights reserved.
Only for training and service purposes
N
Replace one of Bead
& Recheck & R h k
N
Maybe Tuner(TU6502) has problems
Replace one of
N
Q6501 Base
& Recheck
Pin #27 Pin #15 Pin #1
Pin #12
Pin #13 Pin #13
Pin No. Description
1 RF_S/W_CTL
2 RESET
3 3 SCL SCL
4 SDA
5 3.3V
6 SIF
7 1.8V
8 8 CVBS CVBS
9 IF_AGC
10 IF_P
11 IF_N
12 NC
13 13 NC NC
14 NC
15 GND
16 NC
17 NC
18 18 NC NC
19 NC
20 NC
21 NC
22 NC
23 23 NC NC
24 NC
25 NC
26 NC
27 NC
57 LNA_CTRL_1 _ _
58 LNA_CTRL_2
LGE Internal Use Only