Board Descriptions
A - 21
OKIOFFICE 44 Serv. Man., P/N 59276801
+5 V
IC1
X1
20 MHz
PWRDY-N
20 MHz
Initial Reset Circuit
Address bus
RES
XTAL
EXTAL
CPU
Port C
Data/Address bus
Port A
Port B
CK
(PC1/PC2)
M
D-motor
Clutch
Related Signals of CPU (Figure A3.1.1)
A3.1
R44 Circuit Diagram
A3.1.1
R44 Circuit Diagram)
1.
Block diagram
The circuit diagram consists of the CPU, crystal oscillator circuit and reset signal generator.
Figure A3.1.1 shows the block diagram of CPU and the peripheral circuits.
2.
Function
1)
Crystal oscillator circuit
X1 is a 20 MHz crystal oscillator. The output wave is fed to the CPU through pin 73 and
74.
CLK (20 MHz) signal output from pin 71 is used as the system clock and output to IC2.
(IOGA3: input/output gate array).
2)
CPU
CPU controls the following functions in addition to the basic processor.
•
DMA (Direct Memory Access) control
•
Interrupt procedure control
•
A/D converter
•
Bus state control
•
Programmable pattern control
•
16 bit integrated timer pulse unit (ITU)
•
Timing pattern control (TPC)
•
Serial communication interface (SCI)
Содержание OKIOFFICE 44
Страница 2: ...All specifications are subject to change without notice Service Manual OKIOFFICE 44 59276801...
Страница 13: ...Table of Contents TOC 10 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 37: ...General Information 1 24 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 49: ...General Information 1 36 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 121: ...Installation Procedure 2 72 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 125: ...Brief Technical Description 3 4 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 135: ...Disassembly 4 6 OKIOFFICE 44 Service Manual P N 59276801 Whole Unit Picture FX048 CP4 1 Fig 01...
Страница 163: ...Adjustments 5 6 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 165: ...Cleaning and Maintenance 6 2 OKIOFFICE 44 Serv Man P N 59276801 This page was intentionally left blank...
Страница 171: ...Cleaning and Maintenance 6 8 OKIOFFICE 44 Serv Man P N 59276801 This page was intentionally left blank...
Страница 189: ...Cleaning and Maintenance 6 26 OKIOFFICE 44 Serv Man P N 59276801 This page was intentionally left blank...
Страница 193: ...Cleaning and Maintenance 6 30 OKIOFFICE 44 Serv Man P N 59276801 This page was intentionally left blank...
Страница 201: ...Troubleshooting 7 8 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 205: ...Troubleshooting 7 12 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 211: ...Troubleshooting 7 18 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 219: ...Troubleshooting 7 26 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 243: ...Dipswitch Settings 8 2 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 245: ...Board Descriptions A 2 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 265: ...Board Descriptions A 22 OKIOFFICE 44 Serv Man P N 59276801 This page was intentionally left blank...
Страница 277: ...Board Descriptions A 34 OKIOFFICE 44 Serv Man P N 59276801 This page was intentionally left blank...
Страница 293: ...Board Descriptions A 50 OKIOFFICE 44 Serv Man P N 59276801 This page was intentionally left blank...
Страница 301: ...Board Descriptions A 58 OKIOFFICE 44 Serv Man P N 59276801 This page was intentionally left blank...
Страница 305: ...Board Descriptions A 62 OKIOFFICE 44 Serv Man P N 59276801 This page was intentionally left blank...
Страница 323: ...Circuit Diagrams C 2 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 325: ...Illustrated Parts List D 2 OKIOFFICE 44 Service Manual P N 59276801 54 Section 1 Cabinet Assembly 1 2...
Страница 327: ...Illustrated Parts List D 4 OKIOFFICE 44 Service Manual P N 59276801 54 Section 1 Cabinet Assembly 2 2...
Страница 329: ...Illustrated Parts List D 6 OKIOFFICE 44 Service Manual P N 59276801 Section 2 Printer Unit...
Страница 331: ...Illustrated Parts List D 8 OKIOFFICE 44 Service Manual P N 59276801 Section 3 Operator Panel...
Страница 333: ...Illustrated Parts List D 10 OKIOFFICE 44 Service Manual P N 59276801 Section 4 Operator Panel Assembly...
Страница 335: ...Illustrated Parts List D 12 OKIOFFICE 44 Service Manual P N 59276801 Section 5 Frame Assembly Scanner L...
Страница 337: ...Illustrated Parts List D 14 OKIOFFICE 44 Service Manual P N 59276801 Section 6 Plate Assembly Scanner B...
Страница 339: ...Illustrated Parts List D 16 OKIOFFICE 44 Service Manual P N 59276801 Section 7 Plate Assembly Scanner R...
Страница 341: ...Illustrated Parts List D 18 OKIOFFICE 44 Service Manual P N 59276801 Section 8 Frame Assembly Scanner U...
Страница 343: ...Illustrated Parts List D 20 OKIOFFICE 44 Service Manual P N 59276801 Section 9 Cover Assembly Top...
Страница 345: ...Illustrated Parts List D 22 OKIOFFICE 44 Service Manual P N 59276801 Section 10 Plate Assembly Base...
Страница 351: ...Illustrated Parts List D 28 OKIOFFICE 44 Service Manual P N 59276801 Section 12 Cables...
Страница 355: ...Illustrated Parts List D 32 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 357: ...Board Layout E 2 OKIOFFICE 44 Service Manual P N 59276801 MEM eps E 2 MEM PCB...
Страница 358: ...Board Layout E 3 OKIOFFICE 44 Service Manual P N 59276801 TEL U eps E 3 TEL U PCB...
Страница 359: ...Board Layout E 4 OKIOFFICE 44 Service Manual P N 59276801 Hook eps E 4 Hook PCB...
Страница 361: ...Second Paper Feeder F 2 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 381: ...RMCS System G 20 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 383: ...Product Service Bulletins H 2 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 385: ...Product Service Bulletins H 4 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 387: ...Recommended Spare Parts List I 2 OKIOFFICE 44 Service Manual P N 59276801 This page was intentionally left blank...
Страница 388: ...OKIOFFICE 44 Service Manual Part Number 59276801 Printed in the USA...