LG Flatron L2323T Service Manual page 19

NO RASTER ON ANALOG
SIGNAL
Check LED
Status on
Display Head
Amber
Check
U12(AD9888)
.MHS
.MVS
.MCLK
.DATA
Pass
*Check the DTV Jack
Connection
- Y/Pb/Pr Jack check
*Check the other Device
- U26,U27(SDRAM)
- U2,U17(TMDS Receiver)
2. NO RASTER STATE
Check
Blue 3.3V
Power Line
(U801)
Fail
Replace Device
Main B'd :U12
Fail
- 17 -
'A' Process
Check
Ctrl signal
U801 Pin#32
(LVDS PDWN)
High
Check
Scaler(U201)
Output
. LHSYNC
. LVSYNC
. LCKA
. DATA
Pass
Check
Inverter or
LCD Module
Pass
Find a
Soldering Error
or check the
oscillator(X6)
Replace Device
LOW
Main B'd :
U801, U4
Replace Device
Fail
Main B'd
: U201,U801
*Check Connector
Fail
*Check Ctrl Signal
of Module &
Inverter
Fail
Replace the
U201(Scaler)