COPYRIGHT © 2001 CANON INC.
2000 2000 2000 2000
CANON iR5000i/iR6000i REV.0 JUNE 2001
CHAPTER 3 STANDARDS AND ADJUSTMENTS
3-29 T
8. Checking the Surface Potential Control System
8.1 Outline
In the event of an image fault, it is important to find out if the cause is within the static
latent image formation block (including the photosensitive drum and the potential control
system) or is with the developing/transfer mechanism; and to isolate the cause, the surface
potential must first be checked in service mode.
8.2 Disabling the Auto Control Mechanism
The potential control system may be checked by disabling the auto control mechanism
(referred to hereafter as “non-auto control mode).
If improvements are noted in the images made in non-auto control mode, the potential
measurement unit and the DC controller PCB may be suspected.
Further, non-auto control mode may also be made use of as an emergency measure
against an error in the auto control mechanism.
In non-auto control mode, all control settings (corona current, intensity, de-
veloping bias) will automatically be set to the standard settings stored in the
ROM.
Starting Non-Auto Control Mode
1) Make the following selections in service mode, and enter ‘0’:
COPIER>OPTION>BODY>PO-CNT; then, press the OK key.
2) Press the Reset key twice.
Summary of Contents for Image Reader-A1
Page 10: ......
Page 14: ......
Page 16: ......
Page 50: ......
Page 78: ......
Page 80: ......
Page 116: ......
Page 118: ......
Page 122: ......
Page 130: ......
Page 162: ......
Page 178: ......
Page 180: ......
Page 192: ......
Page 202: ......
Page 224: ......
Page 226: ......
Page 240: ......
Page 326: ......
Page 406: ......
Page 408: ......
Page 452: ......
Page 508: ......
Page 510: ......
Page 556: ......
Page 570: ......
Page 578: ......
Page 592: ......
Page 594: ......
Page 600: ......
Page 648: ......
Page 651: ......
Page 766: ......
Page 872: ......
Page 874: ......
Page 896: ......
Page 897: ...COPYRIGHT 2001 CANON INC 2000 2000 2000 2000 CANON iR5000i iR6000i REV 0 JUNE 2001 APPENDIX ...
Page 898: ......
Page 908: ......
Page 914: ......