SECTION 5 - SERVICE
JOHNSON CONTROLS
219
FORM 160.87-OM1
ISSUE DATE: 8/24/2018
5
FIGURE 84 - MICROBOARD LAMP DIMMER CIRCUIT
6
7
8
J6
BRIGHTNESS CONTROL (+) OR (N.C.)
BRIGHTNESS CONTROL (WIPER)
BRIGHTNESS CONTROL (-)
TO
BACKLIGHT
INVERTER
BOARD
JP8
JP7
5.0 VDC
10 K
NOTES:
1. J6-6 not connected (N.C.) to Backlight Inverter Board when display is manufactured by Sharp or NEC.
2. The position of Program Jumpers JP7 and JP8 determine the output at J6-7; In = Variable Voltage; Out = Variable Resistance.
Refer to Program Jumper Listing for applications.
3. Potentiometer is actually an integrated circuit that is the electrical equivalent of a 10KΩ potentiometer.
LD22054
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