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Service Guide DOC-IT3000/4000
Chapter 2 Principles of Operation
Operator Panel
The Operation panel (OCP) is connected to Doc-It Engine (PU). IT has 26 key switches, seven
LED lamps, a 16-character x 2-line LCD, and a buzzer. The OCP sends the press/release data of
the key switches to the Doc-It Controller Board via PU, then displays the LEDs and LCD and
sounds the buzzer by the control of the PU that receives the command from Doc-It Controller.
· The following components make up the operation panel.
- 8 bit MPU (8749 or 8049)
- LCD control driver LSI (MSM6222B or HD44780)
- LCD driver LSI (MSM5259 or HD44100)
- LCD display (16 characters x 2 lines)
- LEDs
- Operation key switches
- Buzzer
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Summary of Contents for DOC-IT3000
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