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Board Descriptions
A - 49
OKIOFFICE 44 Serv. Man., P/N 59276801
5-7
Photosensors
The photosensors mounted on this circuit board/sensor board supervise the paper running state
during printing. These four photosensors are used in this printer as listed below. All of their
outputs enter IOGA for referring to and processing by the CPU.
1)
PS1 (photosensor 1): TNRSNS
Detects the lack of the toner.
2)
PS2 (photosensor 2): PSIN
Detects the leading part of the paper and gives the supervision timing for switching from
hopping operation to feeding operation. Supervises the paper running state and the paper
size according to the paper arrival time and running time.
3)
PS3 (photosensor 3): PSOUT
Supervises the paper feed according to the time of arrival at the sensor and the time of
passage of paper.
4)
PS4 (photosensor 4): WRSNS
Detects the leading part of sensor.
Supervises the paper running state.
5-8
Cover open circuit
The cover open circuit consists of CVSW. When the Cover-Main is opened, the cover open
microswitch (CVSW) on the OLHV/TLHV board is turned off to cut the supply of H5V to the
high-voltage power supply circuit. As a result all high-voltage outputs are interrupted. At the
same time, the CVOPN-N signal is sent to the control board to notify it the off state of the
microswitch, and the control board performs the cover open processing.
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...