DOWNLOAD LG 42PG20-UA (CHASSIS:PU84A) Service Manual ↓ Size: 11.75 MB | Pages: 49 in PDF or view online for FREE

Model
42PG20-UA (CHASSIS:PU84A)
Pages
49
Size
11.75 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
42pg20-ua-chassis-pu84a.pdf
Date
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LG 42PG20-UA (CHASSIS:PU84A) Service Manual ▷ View online

- 17 -
TROUBLE SHOOTING GUIDE
- 18 -
TROUBLE SHOOTING GUIDE
Digital TV Video Trouble Shooting
Check RF Cable
Check TP Clock, Data, Sync
R440, R441, R442
Maybe Tuner(TU400) has problems
Check Mstar  LVDS output
#33(TXAC-) , #32(TXAC+) ,
#17(TXBC-) , #16(TXBC+)
Y
N
Check Tuner 5V Power
IC703 #5 Pin
Replace IC703
Y
N
Y
Maybe Mstar(IC100) has problems
N
Y
Check LD400 color
Bad Tuner. Replace Tuner.
None
Yellow --> none
Check Demodulator Input Clock
X400 (25MHz)
Replace it
N
Y
Check PDP Module
Control board
Refer to Module CAS
- 19 -
TROUBLE SHOOTING GUIDE
- 20 -
TROUBLE SHOOTING GUIDE
Analog TV Video Trouble Shooting
Check RF Cable
Check CVBS signal
TU400 #16 Pin
Maybe Tuner(TU400) has problems
Check CVBS signal
C112
Y
N
Check Tuner 5V Power
IC703 #5 Pin
Replace it
Y
N
Y
Replace it
N
Y
Maybe Mstar(IC100) has problems
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