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Service Manual for OL400e/OL410e/OL410e-PS
Chapter 2 Principles of Operation
2.2.03 Main Controller Board
Overview
The principal components of the main controller board are listed below.
- 16 Mhz Oscillator
- ASIC (with a built-in RISC microprocessor)
- PROM (contains printer control program)
- ROM (contains the bit-mapped fonts)
- EEPROM
- Dynamic RAM (DRAM)
OL400e
512 Kbyte
OL410e
1 Mbyte with an additional 1 Mbyte contained on the Expanded RAM Board
OL410e
1 Mbyte with an additional 1 Mbyte contained on the PostScript Board
Driver Circuitry
RS232 Serial Interface Port
Centronics Parallel Interface Port
Both the print engine functions and the control functions are integrated on the main controller
board. Most of the logic needed to perform print engine functions and control functions is
integrated internally in the microprocessor.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
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Summary of Contents for OL400e Series
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