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%2.1 Main Control Board (Aolm-Pcb)
2.1 Main Control Board (AOLM-PCB)
The control board consists of a one chip CPU, LSIs, a program/font ROM, a DRAM, 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, 33-MHz clock) that
incorporates a RISC CPU and its peripheral devices, and has the following functions:
Built-in device
Function
Chip select controller
Bus controller DRAM controller
Control of ROM, DRAM and I/O device
DMA controller
Transfer of image data from DRAM to OST
LSI
Parallel interface controller
Control of Centronics parallel interface
Serial interface controller
Control of RS-232C serial 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) Program/font ROM
The program/font ROM stores the equipment program and various types of fonts. EPROM/ OTP or
masked ROM is used as an program/font ROM.
(3) Memory
2-Megabyte DRAM (512K x 4) is mounted as resident memory to be used for storing the program and
providing various buffers. This DRAM is expandable up to 34 Mbytes by adding expansion memory
(SIMMs). This DRAM provides the areas shown in the following table.
Memory capacity setting
Memory area
Use
MENU
Expansion RAM
System area
Working area used for the
program
Fixed
Working area
used for the
program
Fixed
Raster buffer
Stores converted bit image data
Enable
Expandable
Receive buffer
Stores temporarily the data
received from the host interface
Enable
Expandable
Содержание OL1200ex
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Страница 87: ...User maintenance mode menu system User maintenance mode menu system...
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Страница 90: ...System maintenance mode menu system System maintenance mode menu system...
Страница 92: ...Note Do not change the default value of 2 5 9 they are the parameters for adjusting in the factory...
Страница 93: ...Engine maintenance mode menu system Engine maintenance mode menu system...
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Страница 125: ...Fig 6 2 Measurement by a Multimeter Fig 6 3 Connector and Pin Location...
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Страница 144: ...No Replace the control board or Power Sensor board...
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Страница 152: ...Chapter 7 7 Wiring Diagram 7 WIRING DIAGRAM 7 1 Interconnect Signal Diagram...
Страница 153: ...7 2 PCB Layout 7 2 PCB Layout 1 Control board AOLM...
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Страница 155: ...7 3 Resistance Check 7 3 Resistance Check...
Страница 157: ...Chapter 8 8 Parts List 8 PARTS LIST Figure 8 1 Printer Unit Name Rating OKI J Part No Qty 50 500 1000 Remarks...
Страница 159: ...21 AOLM PCB 4YA4046 163 4G11 1 2 5 10 55077311...
Страница 173: ...1 2 External View and Component Names 1 2 External View and Component Names...
Страница 177: ...3 2 Parts Layout 3 2 Parts Layout This section describes the layout of the main components...
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Страница 199: ...3 2 Parts Layout 3 2 Parts Layout This section describes the layout of the main components...
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Страница 213: ...5 Connection Diagram 5 CONNECTION DIAGRAM 5 1 Interconnection Diagram AOLE PCB...
Страница 214: ...5 2 PCB Layout 5 2 PCB Layout AOLE PCB...