Figure 20 - Microboard Lamp Dimmer Circuit - Johnson Controls YORK OPTIVIEW YK Series Service Instructions Manual

SECTION 4 - MICROBOARD 031-02430-000 AND 031-02430-001
5.0 VDC
JP8
10 K
JP7
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.

FIGURE 20 - MICROBOARD LAMP DIMMER CIRCUIT

66
J6
6
BRIGHTNESS CONTROL (+) OR (N.C.)
7
BRIGHTNESS CONTROL (WIPER)
8
BRIGHTNESS CONTROL (-)
FORM 160.54-M1
TO
BACKLIGHT
INVERTER
BOARD
LD04054
JOHNSON CONTROLS