Akai LCT2715 Service Manual page 57

Note (2) The power sequence and control signal timing are shown as the following figure.
V
BL
Ton
0
V
2.0V
BLON
0.8V
0
Tr
2.0V
V
SEL
0.8V
0
2.0V
V
EPWM
0.8V
0
3.0V
V
IPWM
0
V
W
External
PWM
Period
Backlight on duration
Tf
Ext. Dimming Function
T
T
PWMF
PWMR
PWM Duty
Int. Dimming Function
External
Minimun
Duty
11
Toff
100%