Canon imagePRESS 1135 Series Service Manual page 102

2
Technology > Image Formation System > Various Types of Control > Image Stabilization Control
Drum Surface
Potential (V)
500V
Vback
(fixed value)
● D-half Control
This corrects the value of the image gradation held on the main controller.
This control is only performed on the product equipped with either of PS/PDF controller
(Adobe/EFI) or the reader. This control is not performed on the Canon printer model.
Timing
1) When the PASCAL control is executed:
• complies with the value in COPIER > OPTION > IMG-MCON > INTROT-3.
Description
1) Form patch images (9 types) on the ITB based on the gradation data sent from the main
controller.
2) Detect the patch density and send back the value to the main controller.
3) The main controller corrects the gradation data.
2 Technology > Image Formation System > Various Types of Control > Image Stabilization Control
Vd potential
Vcont
(contrast potential)
Vdc
Vl
Lp
Laser pawer
F-2-76
● Secondary Transfer ATVC Control
Prevent a secondary transfer failure caused by environmental changes and deterioration of
the secondary transfer roller.
Timing
1) At the time of multiple initial rotation(fixing temperature of lower than 50 degree C).
2) At the time of initial rotation
3) For every 8000 prints
4) At the time of last rotation after 2000 prints
Description
1) Apply a constant current (-55μA) and detect a voltage (2TRV1).
2) Apply a constant voltage (2TRV1) and detect a current (2TRI1).
3) Apply a voltage (2TRV2) in which an offset voltage (+500V) was added to a constant
voltage (2TRV1) and detect a current (2TRI2).
4) Apply a voltage (2TRV3) in which an offset voltage (-500V) was added to a constant
voltage (2TRV1) and detect a current (2TRI3).
5) Create a target current (2TRItarget) from 2TRI2 and 2TRI3 and determine the secondary
transfer voltage (2TRVdc) against the target current.
Current (A)
2TRI3
2TRI1
55μA
2TRItarget
2TRI2
2TRV2
2-54
-500V +500V
2TRV1 2TRV3
Voltage
(V)
2TRVdc
F-2-77
2-54