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BACKLIGHT DIMMING PROBLEMS
1
Enter Menu ?
9
Go to
Menu
£
Picture
£
Backlight
– vary level (0 – 50)
2
If no backlight changes
are observed vary the
level again ?
9
Check
BLU_PWN
(PIN
6
) control voltages (
CNM801
)
– varies approx. 0.5V – 2.5Vdc
CNM801
A13V
A13V
GND
GND
A13V
A13V
1
3
5
7
9
11
2
4
6
10
12
GND
Power_On/Off
OD ON/OFF
BLU_PWM
GND
ANA-DIM
8
If it doesn’t vary voltage ?
If it changes ?
9
Replace MainBoard /
T-CON Board
9
Replace SMPS Board
NOTE
New is PWM1 Blue & PWM2 White that changes with backlight level (if Blue is 0V - "Yellow" if "white" 0V "Blue"
Backlight error would appear)
4-12
4. Troubleshooting