Samsung PS42C7HX/XEC - Page 79

Troubleshooting
6-10 Samsung Electronics
Abnormal
Display
[ Y-MAIN ]
Check necessary points
[ Logic Main ]
Observation of
abnormal display
[ X-MAIN ]
Check necessary points
[ Logic Main ]
LED Blinks
( action of Vsync )
Regular
abnormal
pattern
Replace the Board
NO
YES
Logic Main
Normal State
Replace the PDP
[ Y-MAIN ]
Check several points
FUSE
FET
Y-MAIN
Normal State
Replace the Board
Replace the Board
OK
OPEN
SHORT
OK
F5001 for VDD
F5002 for Vs
F5004 for VCC
F5005 for OUT_L
Q5009~Q5021
[ X-MAIN ]
Check several points
FUSE
FET
X-MAIN
Normal State
Replace the Board
Replace the Board
OK
OPEN
SHORT
OK
F4001 for VCC
F4002 for Vs
F4004 for VDD
F4005 for Ve
Q4002~Q4003
Q4011~Q4016
② Abnormal Display(Abnormal Image is on Screen.(except abnormality in Sustain or Address)
▶ Abnormal Display is related with Y-MAIN, X-MAIN, Logic Main and so on.
This page shows you how to check the boards, and the following pages show you how to find the defective board.