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SECTION 9 - DISPLAY BACKLIGHT INVERTER BOARD
The lamp brightness is controlled by a variable volt-
age signal, developed by the Lamp Dimmer circuit (See
Figure 20 on page 68) on the microboard and ap-
plied to the Inverter Board. The Lamp Dimmer circuit
varies the voltage over the range of 0 to +3.0 VDC. 0
VDC produces maximum brightness (100%). +3.0 VDC
produces minimum brightness (0%). Voltages between
these values produce a linear brightness between 100%
and 0%.
RETURN
500 - 1400 VAC
3
2
1
J2
INVERTER
BOARD
J1
1 2
3
4
5
N.C.
INVERTER CABLE 031-01770-003
FIGURE 48 - DISPLAY BACKLIGHT INVERTER BOARD (SHARP LQ10D367/368 (031-01774-000) AND LG
SEMICON LP104V2-W (031-02046-000))
120
BACKLIGHT
LAMP
NOTES:
1. OFF = 0VDC; ON = +5VDC. Refer to Mi-
croboard Program Jumpers JP3 AND JP4.
2. 0 - +3.0VDC. 0VDC = MAX (100%) Bright-
ness; +3.0VDC = MIN (0%) Brightness.
Refer to Fig. 13 and Microboard Jumpers
JP7 AND JP8.
3. Refer to Microboard Program Jumper JP5.
4. N.C. = No Connection.
BRIGHTNESS CONTROL (NOTE 2)
BACKLIGHT ENABLE (NOTE 1)
GND
+ 12 VDC (NOTE 3)
JCI COMPANY CONFIDENTIAL
DISPLAY BACKLIGHT INVERTER BOARD
PART NUMBER: 031-01789-000
FOR: SHARP LQ10D367/368 (031-01774-000) AND
LG SEMICON LP104V2-W (031-02046-000) DISPLAYS
J6
N.C.
10
N.C.
9
N.C.
8
7
N.C.
6
5
4
N.C.
3
N.C.
2
1
FORM 160.54-M1
ISSUE DATE: 10/25/2019
MICRO
BOARD
LD09568a
JOHNSON CONTROLS
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