PD100F5 datasheet(3/8 Pages) NIEC

3 / 8 page

Bias voltage (VEE) ...

The PC8106-2 is available in two configurations, PC8106N and

PC8106P. The differences are the PC8106N-2 generates a negative

(-14 to -24)voltage, 0 to +3 volts for LCD bias. The PC8106P-2

generates a positive(24 to 35 volts) voltage for LCD bias. The

0 to +3 volts on the PC8106N-2 is for Kyocera displays only.

These voltages are factory set to a specific LCD module when

the module is specified with the order. However, when this is

not specified users must check their modules required bias

voltage prior to use since these values do vary from model to

model.

The bias voltage is switched on only when all the registers are

set and the clock to the LCD is running. This protects the

display from damage which could occur if this voltage were

applied before the controller was initialized and running.

The negative bias voltage range is -14 to -24 volts controlled

R28 and the positive bias voltage range is +24 to +34 volts

controlled by R23.

This potentiometer is adjusted for proper contrast on the

display. If needed this potentiometer may be remoted off the

board. To do this remove R23 or R28 depending on which version

you have and connect the external potentiometer to connector J6

as follows:

PC8106P-2, 10K

PC8106N-2, 100K(R28) 5K(R23)

J6.1, CW

J6.2, CW

J6.3, Wiper

J6.4, Wiper

J6.5, CCW

J6.6, CCW

Pin 1 of J6 is identified with a square pad.

PD100F5 Datasheet(PDF) 3 Page - Nihon Inter Electronics Corporation