Backlight Inverter Unit - Akai LCT3785TAJ Service Manual

3-3 BACKLIGHT INVERTER UNIT

ITEM
Lamp voltage
Lamp current
Lamp life time
Input voltage of inverter
Input current of inverter
Lamp frequency
Inverter dimming voltage
Inverter duty ratio
Inverter opening voltage
ON
Backlight on /off
control voltage
OFF
Power consumption
[Note 1] Lamp Current measurement method:
the average of 16 CCFLs' lamp current as V
1
2
1
2
1
2
1
2
Inverter
1
2
1
2
1
2
1
2
[Note2] Definition of the lamp life time:
When lamp luminance redue to 50% or lower than its initial value.
SYMBOL MIN
VL --
IL 4.5
LT 50000
VBL 21.6
IIN0 --
IIN --
FL 61.5
VDIM 0
D 20
Vopen 2300
2.0
V
BLON
0
BLW0 --
BLW --
HV(Blue)
HV(White)
HV(Blue)
HV(White)
HV(Blue)
HV(White)
HV(Blue)
HV(White)
HV(Blue)
HV(White)
HV(Blue)
HV(White)
HV(Blue)
HV(White)
HV(Blue)
HV(White)
TYP MAX
1400 --
5 5.5
-- --
24 26.4
(5.7) --
(5.4) --
63.5 65.5
-- 5
-- 100
-- 2700
-- 5
-- 0.8
(140) --
(130) --
(The current meter is connected to low voltage end)
= 5V after power on for 30 minutes.
DIM
LCD MODULE
85／126
UNIT REMARK
Vrms IL=5.0mA
mArms *1)
hr *2)
V *3)
*4)
A
*5)
KHz *6)
Vdc *7)
% VDIM=5V(MAX.)
Vrms
V
*4)
W
*5)
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Take