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PD100F5 Datasheet(PDF) 3 Page - Nihon Inter Electronics Corporation |
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PD100F5 Datasheet(HTML) 3 Page - Nihon Inter Electronics Corporation |
3 / 8 page 3 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 by 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. |
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