DOWNLOAD LG 50PG20-UA (CHASSIS:PU84A) Service Manual ↓ Size: 10.03 MB | Pages: 48 in PDF or view online for FREE

Model
50PG20-UA (CHASSIS:PU84A)
Pages
48
Size
10.03 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
50pg20-ua-chassis-pu84a.pdf
Date
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LG 50PG20-UA (CHASSIS:PU84A) Service Manual ▷ View online

- 33 -
TROUBLE SHOOTING GUIDE
- 34 -
TROUBLE SHOOTING GUIDE
Analog TV Audio Trouble Shooting
Check video output
Follow procedure All source audio trouble
shooting
Y
Follow procedure analog TV video
trouble shooting
N
N
Maybe Mstar audio block has problems.
Replace it
Check L400, L402 voltage level 5V
Replace it
N
Y
Check SIF buffer signal
Replace it
N
Y
Check SIF signal
C409
Replace it
N
Y
- 35 -
TROUBLE SHOOTING GUIDE
- 36 -
TROUBLE SHOOTING GUIDE
Component / RGB / AV Audio Trouble Shooting
Check video output
Y
Follow procedure external
input video trouble shooting
N
Check Connector
JK602 / JK603 (Component)
JK607 (RGB)
JK601 / JK604 (AV Rear, AV Side)
Replace connector
N
Y
Check signal
R618 / R619 (Component1)
R645 / R646 (Component2)
R654 / R655 (RGB)
R6092 / R6094 (AV Rear)
R6090 / R6096 (AV Side)
Replace it
N
Y
Check IC602 power #14pin#
14pin
 voltage level 5V
Replace it
N
Y
Check Audio out signal
IC602 #2,3 #9,10
Replace it or IC602
N
Y
Check IC100 signal
C102, C103, C104, C105, C176, C182
Replace it
N
Y
Check I2S signal
R1035, R1037, R1038
Replace it or IC100
N
Y
Check Audio clock
R1036
Replace it
N
Y
Maybe 
Mstar has problems
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