Board Descriptions
A - 27
OKIOFFICE 44 Serv. Man., P/N 59276801
A3.1.5
R44 Circuit Diagram
1.
Block diagram
The circuit diagram consists of the following functions:
•
IC6 (A/D converter)
•
30 V/24 V conversion circuit
•
Connector CN5 that provides an interface between R44 board and CIS (contact image
sensor).
Figure A3.1.5 shows the related signals and block diagram of CIS.
2.
Function
One-line picture data is read in the sequence from the scanning unit (CIS) as SIG signal
(analog data) to A/D converter (analog/digital converter) of IC6. After conversion from analog
data to 6-bit digital signal (SDATA0 - SDATA5) under the control of IC6, this picture data is sent
to IOGA3 (input/output gate array). Here, the picture data undergoes various kinds of picture
processings.
Sensor interface signal output from IOGA3
•
LEDON :
LED on/off control signal
•
SNSCLK :
Scanning sensor drive clock (714.286 kHz)
•
MISP
:
Scanning synchronous signal (5 msec)
•
ADCLK :
Sampling clock for A/D converter (714.286 kHz)
Shift register & analog switches
CN5
10
3
4
2, 5, 7
-8 V
0 VA
CIS (contact image sensor)
R44
VLED
+5 V
-8 V
0 VA
LEDs array
Rod lens array
sensor
1728 bit (216 mm)
+5 V
9
6
8
1
VLED (+24V)
GLED
MISP
DCK
SIG
GLED
MISP
DCK (714.286 kHz)
SIG
A/D converter
Amplifier
TR9/TR10
Transistor
LEDON
IOGA
IC2
SDATA0 - SDATA5
IC6
30 V/24 V conversion
circuit
30V
24 V
Figure A3.1.5 Related Signals and Block Diagram of CIS (contact image sensor)
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...