33
150P4 LCD
Repair Flow Chart
No Raster
Check
Powe + inverter
board12V/3.3V/ DC
No
Yes
Power+ inverter Board
Bad AC adapter
Check
video signals input
interface
No
Video source
Yes
Check
Power+Inverter panel
620VAC with load
No
OK
Replace fluorescent
lamp
Replace main panel
Front control key
does not work
Check
Front control panel
(Key & SW)
Yes
Check
Signal connectors
1712, 1503
Replace main panel
Yes
Block Diagram
AC IN
Power inverter
board
Main panel
620Vrms
Fluorescent
Lamp
LCD panel
3.3V/12VDC
12V DC
No power
(power indicator off)
Check
12V/3.3V DC
No
Yes
Power
inverter board
Replace Main panel
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