Inverter Characteristics - Akai lct2785ta Service Manual

3.2.2 INVERTER CHARACTERISTICS (

Parameter
Power Consumption
Power Supply Voltage
Power Supply Current
Input Ripple Noise
Backlight Turn on
Voltage
Oscillating Frequency
Dimming Frequency
Minimum Duty Ratio
Note (1) Lamp current is measured by utilizing high frequency current meters as shown below:
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Note (2) The lamp starting voltage V
up duration. Otherwise the lamp could not be lighted on completed.
Note (3) The lamp frequency may produce interference with horizontal synchronous frequency from the
display, and this may cause line flow on the display. In order to avoid interference, the lamp
frequency should be detached from the horizontal synchronous frequency and its harmonics as far
as possible.
Ta = 25 ± 2 ºC)
Symbol
Min.
P -
BL
22.8
V
BL
I -
BL
- -
1790
V
BS
1200
F 53
W
F 150
B
D -
MIN
HV (Pink)
HV (White)
HV (Pink)
HV (White)
HV (Pink)
HV (White)
LCD
HV (Pink)
Module
HV (White)
HV (Pink)
HV (White)
HV (Pink)
HV (White)
HV (Pink)
HV (White)
should be applied to the lamp for more than 1 second under starting
S
Value
Typ. Max.
92 -
24 25.2
3.8 -
- 500
- -
- -
56 59
160 170
10 -
1
2
1
2
1
2
1
2
1
2
1
2
1
2
38
Unit Note
W (5), I = 4.7mA
L
V
DC
A Non Dimming
mV V =22.8V
P-P BL
V Ta = 0 ºC
RMS
V Ta = 25 ºC
RMS
kHz
Hz
%
Inverter
LV (Gray)
Version 1.0