120
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 9 - DISPLAY BACKLIGHT INVERTER BOARD
JCI COMPANY CONFIDENTIAL JOHNSON CONTROLS
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%.
FIGURE 48 - DISPLAY BACKLIGHT INVERTER BOARD (SHARP LQ10D367/368 (031-01774-000) AND LG
SEMICON LP104V2-W (031-02046-000))
LD09568a
J6
10
9
8
7
6
5
4
3
2
1
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
MICRO
BOARD
INVERTER
BOARD
1 2 3 4 5
N.C.
J1
J2
3 2 1
N.C.
RETURN
500 - 1400 VAC
BACKLIGHT
LAMP
BRIGHTNESS CONTROL (NOTE 2)
BACKLIGHT ENABLE (NOTE 1)
GND
+ 12 VDC (NOTE 3)
INVERTER CABLE 031-01770-003
DISPLAY BACKLIGHT INVERTER BOARD
PART NUMBER: 031-01789-000
FOR: SHARP LQ10D367/368 (031-01774-000) AND
LG SEMICON LP104V2-W (031-02046-000) DISPLA
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.
To Next Page
Loading...
