Akai LCT2765TD, Service Manual

Page: 77 / 105

Preliminary
3.2.2 INVERTER CHARACTERISTICS
(
Ta = 25 ± 2 ºC)
Value
Parameter Symbol
Min. Typ. Max.
Unit Note
Power Consumption P
BL
- 92 - W (5), I
L
= 4.7mA
Power Supply Voltage V
BL
22.8 24 25.2
V
DC
Power Supply Current I
BL
-
3.8
-
A Non Dimming
Input Ripple Noise -
- -
500 mV
P-P
V
BL
=22.8V
1790 - - V
RMS
Ta = 0 ºC Backlight Turn on
Voltage
V
BS
1200 - - V
RMS
Ta = 25 ºC
Oscillating Frequency F
W
53 56 59 kHz
Dimming Frequency F
B
150 160 170 Hz
Minimum Duty Ratio D
MIN
- 10 - %
Note (1) Lamp current is measured by utilizing high frequency current meters as shown below:
LV (Gray)
A
A
A
A
A
A
A
A
A
A
A
A
A
A
2
HV (Pink)
HV (White)
1
2
HV (Pink)
HV (White)
1
2
HV (Pink)
HV (White)
1
2
HV (Pink)
HV (White)
1
2
HV (Pink)
HV (White)
1
2
HV (Pink)
HV (White)
1
2
HV (Pink)
HV (White)
1
Inverter
LCD
Module
Note (2) The lamp starting voltage V
S
should be applied to the lamp for more than 1 second under starting
up duration. Otherwise the lamp could not be lighted on completed.
７６ˋ