OKI ML521 Uživatelský manuál stáhnout pdf (Strana 36)

Page: 20

Service Guide ML520/521

Chapter 2 Principles of Operation

2.1.01 Main Control Board

The main control board is made up of the microprocessor, peripheral circuits, drive circuits, sensors and

interface connectors.

The power to the main control board is supplied by the transformer assembly through a wire harness.

The power to other electrical parts (line feed motor, space motor and printhead) is provided by the power

supply circuitry through connectors on the main control board.

Microprocessor (MPU) (Location 04C: 67X640)

16 bit MPU, using CMOS technology.

The MPU contains a 20 bit address bus, a 16 bit data bus.

The MPU can access 1 Mbyte of program memory and 1 Mbyte of data memory space.

The microprocessor controls the entire printer by executing the control program through the

LSIs and the driver circuits.

Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

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OKI ML521 Uživatelský manuál Strana 36