Samsung Electronics
4-7
Troubleshooting
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)
Does input signal?
CNL01-3~17pin
(DIGITAL DATA,DCLK)
Check serial port of
LCD control?
CNL01-18~20pin
Change Assy-LCD
. Check FPC-LCD.
2. Check CNJ02-3~pin voltage of main-board.
3. Check QP5,QP5 of Main-board.
No
Yes
No
No
Input
signal in CNL02, CNL03
pin normal?
Check connection of LCD Panel
No
. Check FPC-LCD.
2. Check CNJ0-8~27pin wave of main board.
. Check FPC-LCD.
2. Check CNJ0-8~0pin wave of main board.
Yes
Yes
Yes
Refer to a pattern
image of Fig 4-13
Refer to a pattern
image of Fig 4-13
