Samsung HPT5054X/XAA Service Manual page 39

Troubleshooting
( Address Open, Short
& Address Open and Short is related with Logic Main, Logic Buffer, FFC, TCP film and so on.
This page shows you how to check the boards, and the following pages show you how to find the defective board.
[ Logic Main ]
Address Open/Short
Check the LED operation
LED2011 : blink
LED2010 : on
Check if the internal mode
screen is normal
OK
Reload the data onto the
MICOM and recheck it
Check the detailed waveform
and control the signal waveform
DONE
4-12
NG NG
Check the
Video Board
OK
Check if a specific TCP Block
screen is displayed abnormally
Check if there is an open or
short circuit on the Buffer Board
and the Logic Main address
data output section.
Check the FFC connection status
OK
NG
Replace Logic Main /
Address Buffer (E or F) /
OK
check the voltage of
C2901, C2902, C2903 is 1.25V
OK
NG
check the voltage of
U2650 pin1 is 3.3V
NG
FFC
NG
Replace the Panel
Samsung Electronics