LG MG810c Service Manual page 45

4. TROUBLE SHOOTING
C. LCD Display Trouble
• LCD Control signals from Main Board
- LCD_RST, LCD_CS, LCD_ADS, MLED, LCD_D(0)~LCD_D(15)
• Check Points
- The Assembly status of the LCD Module
- The Soldering of connector
- The FPCB which connects the LCD Module
• Trouble Shooting Setup
- Connect PIF Jig, and Power on
• Trouble Shooting Procedure
Check the signals
NG
Check the signals
Of the IC U202
The Main board is out of order.
Change the Main board.
START
Check the signal
Of CNN 302 ?
NG
The signals is
LCD_RST, LCD_CS,
LCD_ADS, MLED,
LCD_D(0)~LCD_D(15 )
Of filters
In case the signals is ok.
In case the signals is ok.
In case the signals is ok.
- 44 -
LCD is out of order.
Change the LCD
RF PCB is open.
Change the Key-PCB
The IC or filters
Is out of order