Canon iR3570 Series, Руководство по обслуживанию

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Chapter 7
7-6
F-7-11
In [1] above, a cleaning bias (-2600 V) is applied.
7.4 Image Stabilization Control
7.4.1 Overview
0006-5986
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
At times, changes in the environment or wear on the machine can cause its image output to become unstable. To make sure that its output will remain stable at all
times, the machine uses the following control mechanisms:
T-7-7
F-7-12
7.4.2 APVC Control
0006-5987
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
The term APVC stands for "auto primary voltage control," and it is a mechanism used to control the primary charging application voltage (DC component) to suit
the film thickness of the machine's photosensitive drum. APVC is performed every 500 sheets while the machine is in operation. It is forcibly performed when the
drum unit is replaced.
7.4.3 ATVC Control
0006-5989
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
The machine is provided with a constant current control mechanism that can be enabled or disabled in service mode: COPIER>OPTION>BODY>TRANS-SW.
7.5 Drum Unit
7.5.1 Charging Mechanism
7.5.1.1 Controlling the Primary Charging Bias
0006-5991
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
T-7-8 Primary Charging Bias
[1] Drum film thickness detection control corrects the development contrast.
[2] Developing contrast control determines the appropriate primary charging DC bias and
developing DC bias.
[3] ATVC control corrects the transfer bias.
AC bias 2700 Vp-p (max.)
Image write
end
Primary charging
(PRI)
Main motor
(M-motor)
Laser
(LD)
Developing AC
(DEV_AC)
Developing DC
(DEV_DC)
Developing clutch
(DEV_CL)
Transfer
(TR)
Static removal
(SEP) [1]
BK
[2]
[1]
[3]