Brief Technical Description
3 - 2
OKIOFFICE 44
Service Manual, P/N 59276801
Process
Illustration
Description
3.1
Fundamentals of the Electro-Photographic Process
The electro-photographic process involves six sub-processes:
(1) Charging (2) Exposure (3) Development (4) Transfer (5) Fusing (6) Cleaning
Each process is briefly explained below.
The surface of the electrophotographic
Image drum is uniformly charged with
negative charges by applying a negative
voltage to the charge roller.
When the applied DC voltage exceeds a
threshold value, charging of the drum
begins.
Light emitted from the LED head irradiates
the negatively charged surface.
The potential of the irradiated part of the
Image drum surface is raised, so that an
electrostatic latent image associated with
the print image is formed.
Toner is attracted to the exposed part
(high-potential part) of the Image drum at
the contact between the Image drum and
the developing roller, making the electro-
static latent image visible.
At the same time, the residual toner on the
Image drum is attracted to the developing
roller by static electricity.
Charging
1
Charge roller
EP drum
Development
3
Power
Supply
Charge roller
EP drum
Exposure
2
LED head
EP drum
Developing roller
Power
Supply
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...