Samsung VP-MX20H Service Manual page 33

Samsung Electronics
If LCD display gets being inferior
(Being white screen, nothing comes
up on the screen)
Does
the power
supply work normally?
CNL0-23/24 Pin
(3V, 2V)
Yes
Does input signal?
CNL01-3~17pin
(DIGITAL DATA,DCLK)
Yes
Check serial port of
LCD control?
CNL01-18~20pin
Yes
Input
signal in CNL02, CNL03
pin normal?
Yes
Change Assy-LCD
. Check FPC-LCD.
No
2. Check CNJ02-3~pin voltage of main-board.
3. Check QP5,QP5 of Main-board.
No
. Check FPC-LCD.
2. Check CNJ0-8~27pin wave of main board.
Refer to a pattern
image of Fig 4-13
No
. Check FPC-LCD.
2. Check CNJ0-8~0pin wave of main board.
Refer to a pattern
image of Fig 4-13
No
Check connection of LCD Panel
Troubleshooting
4-7