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Board Descriptions
A - 23
OKIOFFICE 44 Serv. Man., P/N 59276801
A3.1.2
R44 Circuit Diagram
1.
Block diagram
The circuit diagram consists of an input/output gate array IC2 (IOGA3).
Figure A3.1.2 shows the related signals of IOGA3.
2.
Functions
IOGA3 is a newly developed LSI for scanning and printing control of the OKIOFFICE 44.
IOGA3 contains the following functions:
•
Scanning sensor control
•
Send motor control
•
Various image data processing control for scanning data
•
Strobe signals control for LED head
•
Smoothing control for printing data
•
Interface of the peripheral LSI, optional memory and CPU
Scanning
control
Data/address bus
Data/address bus
A4 image
sensor
M
S-motor
1/4
Printer control
OST-EX
Buffer 640 bytes
Decoding
(RLE, TIFF, ACC32)
200-300 converter
smoothing
Various sensor
2/4
LED head
Data/address bus
High-voltage
controller
3/4
High-voltage
power supply
TLHV/OLHV
Data/address bus
Peripheral control
1284 control
CS generation
I/O port
4/4
Bi-Centro
I/F
CTR
OPE unit
Speaker
Related Signals of IOGA (Figure A3.1.2)
Summary of Contents for OKIOFFICE 44
Page 2: ...All specifications are subject to change without notice Service Manual OKIOFFICE 44 59276801...
Page 135: ...Disassembly 4 6 OKIOFFICE 44 Service Manual P N 59276801 Whole Unit Picture FX048 CP4 1 Fig 01...
Page 329: ...Illustrated Parts List D 6 OKIOFFICE 44 Service Manual P N 59276801 Section 2 Printer Unit...
Page 331: ...Illustrated Parts List D 8 OKIOFFICE 44 Service Manual P N 59276801 Section 3 Operator Panel...
Page 351: ...Illustrated Parts List D 28 OKIOFFICE 44 Service Manual P N 59276801 Section 12 Cables...
Page 357: ...Board Layout E 2 OKIOFFICE 44 Service Manual P N 59276801 MEM eps E 2 MEM PCB...
Page 358: ...Board Layout E 3 OKIOFFICE 44 Service Manual P N 59276801 TEL U eps E 3 TEL U PCB...
Page 359: ...Board Layout E 4 OKIOFFICE 44 Service Manual P N 59276801 Hook eps E 4 Hook PCB...
Page 388: ...OKIOFFICE 44 Service Manual Part Number 59276801 Printed in the USA...