Figure 84 - Microboard Lamp Dimmer Circuit - York YK-EP B Operation & Maintenance Manual

FORM 160.87-OM1
ISSUE DATE: 8/24/2018
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 84 - MICROBOARD LAMP DIMMER CIRCUIT

JOHNSON CONTROLS
J6
6
BRIGHTNESS CONTROL (+) OR (N.C.)
7
BRIGHTNESS CONTROL (WIPER)
8
BRIGHTNESS CONTROL (-)
SECTION 5 - SERVICE
TO
BACKLIGHT
INVERTER
BOARD
LD22054
219
5