Akai LCT42Z7TAP, Service Manual

Page: 87 / 130

Product Specification
LC420WU1
Liquid Crystal Display
3-2-2. Backlight Inverter
Input Connector
-Inverter Connector :
S12B-PH-SMC
(manufactured by JST)
-Mating Connector : PHR-12
Status Connector
-Inverter Connector : 20022WR-02A00(manufactured by Yeon Ho co., Korea)
-Mating Connector : 20022HR-02S00(manufactured by Yeon Ho co., Korea)
Table 7. INVERTER CONNECTOR PIN CONFIGULATION
Note : 1. GND should be connected to the LCD module
’
s metal frame.
2. Minimum Brightness : V
BR
= 0.0V
Maximum Brightness : V
BR
= 3.3V
3. V
ON
: 2.5 ~ 5.25V
V
OFF
: 0.0 ~ 0.8V
PCB
1 2 3 12 11
Top
Bottom
Component side
Input connector
1
1
2
Status connector
GND POWER GND GND 1
Option Pin(Lamp Open Status Detection)
3
Don’t care On/Off
0V ~ 5.0V
On/Off
12
Status
Upper 3.0V(Normal),
Under 0.7V(Abnormal)
Status
2
Don’t care
GND
GND
GND
GND
GND
V
BL
V
BL
V
BL
V
BL
V
BL
Slave
V
BR
GND
GND
GND
GND
GND
V
BL
V
BL
V
BL
V
BL
V
BL
Master
2
POWER GND GND 7
POWER GND GND
8
1
0V ~ 3.3V
V
BR
11
POWER GND
GND
10
POWER GND GND
9
POWER GND
GND
6
Power 24.0V V
BL
5
Power 24.0V V
BL
4
Power 24.0V V
BL
3
Power 24.0V V
BL
2
Power 24.0V V
BL
1
Note Description Symbol Pin No
85／128