User Guide

Flow chart of Troubleshooting and Circuit Diagram 5-18
5-10 Back Light (for Main & Sub LCD)
Backlight does not work
Select LCD Contrast high level
LCD Contrast high level
in the menu?
CN 200 pin 10 = 3.3V ?
Check the circuit related to
U100
No
Ye s
Ye s
No
MAIN LCD
SUB LCD
Ye s
END
Replace the PBA
CN200 pin 25 = "H" ?
SC600 pin 1 = "H" ?
Check the circuit
related to SC600
No
Ye s
No
Do 3LEDs correctly work?
Ye s
Check LED1, LED2,
LED3
and R5, R6, R7
No
Replace the LCD module
Ye s
END
Replace the PBA
CN200 pin 12 = "H" ?
LCD backlight on ?
Check the circuit
related to d365
No
Ye s
No
Ye s
Replace EL sheet