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Operation Description
2 - 3
OKIPAGE 16n
Service Manual, P/N 59274401
Built-in device
Function
Chip select controller
Control of ROM, DRAM and I/O device
Bus controller
DRAM controller
DMA controller
Transfer of image data from DRAM to OST LSI
Parallel interface controller
Control of Centronics parallel interface
Timer
Generation of various control timing
Monitoring of paper running and paper size
Serial I/O port
Control of operator panel, EEPROM, and options
I/O port
Inputting/outputting of sensor, signal and motor signal
Option I/O interface
Control of OKI HSP interface
2.1
Main Control Board (BOARD-COM)
The control board consists of an one chip CPU, LSIs, program/font ROM's, DRAM's, an EEPROM,
a host interface circuit, and a mechanism driving circuit.
(1) One-chip CPU
The one-chip CPU is a custom CPU (32-bit internal bus, 32-bit external bus, 32-MHz clock)
that incorporates an RISC CPU and its peripheral devices, and has the following functions.
(2) Program/font ROM's
The program/font ROM's store the HP IV emulation program and various types of font.
MASK ROM is used as the program/font ROM's.
Содержание Okipage 16n
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Страница 165: ...Wiring Diagrams 7 2 OKIPAGE 16n Service Manual P N 59274401 7 2 PCB Layout 1 Main board BOARD COM ...
Страница 166: ...Wiring Diagrams 7 3 OKIPAGE 16n Service Manual P N 59274401 2 Power Supply board 3 Driver board AOLC PCB ...
Страница 167: ...Wiring Diagrams 7 4 OKIPAGE 16n Service Manual P N 59274401 4 PostScript board BOARD PSBA OKIPAGE16n PS only ...
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Страница 208: ...High Capacity Second B 21 OKIPAGE 16n Paper Feeder Service Manual P N 59274401 5 2 PCB Layout AOLT PCB ...
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Страница 232: ...Multi Feeder C 21 OKIPAGE 16n Maintenance Service Manual P N 59274401 5 2 PCB Layout AOLE PCB ...
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Страница 238: ...OKIPAGE 16n Service Manual Part Number 59274401 Printed in the USA ...