COPYRIGHT© 2001 CANON INC.
2000 2000 2000 2000
CANON iR105 REV.0 JULY 2001
CHAPTER 2 NEW FUNCTIONS
2-62
5.3 Addition of the Pre-Transfer Exposure LED
The machine uses a process speed of 500 mm/sec (as opposed to 300 mm/sec in the
GP605 (iR600)) to support a copying speed of 105 pages/min (A4, Direct). To make up for
the decrease in charging on the photosensitive drum caused by the increase in the process
speed, the machine uses a photosensitive drum with a high degree of charging capacity and
a pre-exposure lamp with a short wave length (660 nm), thus ensuring a specific degree of
charging.
The higher process speed also decreases static charges used for separation; the pre-trans-
fer exposure LED is used to compensate for the decrease:
Memo
Pre-Transfer Exposure
Function: In an initial phase of the transfer process, the charges on the pho-
tosensitive drum (background potential) are reduced in advance,
thereby weakening the stack bonding between the photosensitive
drum and the transfer paper and ultimately encouraging separa-
tion.
Timing: The LED is turned on 100 msec before the leading edge of an im-
age reaches a specific point until its trailing edge leaves it; (See
F02-502-02)
The pre-transfer exposure LED is enabled/disabled according to paper type
in service mode (COPIER>OPTION>BODY>PAPER-TY):
PAPER-TY=1 (paper for 200V model)
→
ON
PAPER-TY=2 (paper for 208V/230V model)
→
OFF
5.4 Measures Against Overheating of the Developing Unit
The machine must consider possible overheating of the developing unit caused by the in-
creased process speed. When double-sided copying is performed continuously for a long
time, the heat used when fixing on the first sides can heat the developing unit, affect the
toner, and cause fogging. To prevent overheating, the following measures have been taken:
• addition of a developing fan
• modification of the developing cylinder cover
5.5 Addition of the Developing Fan
To prevent overheating of the developing assembly [1], a developing fan has been added
to the front of the machine. (See 8.2 Fans)
Summary of Contents for iR105 Series
Page 547: ...COPYRIGHT 2001 CANON INC 2000 2000 2000 2000 CANON iR105 REV 0 JULY 2001 APPENDIX ...
Page 561: ...Service Mode COPYRIGHT 2001 CANON INC 2000 CANON iR105 REV 0 JULY 2001 ...
Page 691: ...Error Code COPYRIGHT 2001 CANON INC 2000 CANON iR105 REV 0 JULY 2001 ...
Page 727: ......
Page 731: ......
Page 737: ......
Page 739: ......
Page 745: ......
Page 749: ......
Page 757: ......
Page 761: ......
Page 765: ......
Page 769: ......
Page 775: ......
Page 799: ......
Page 817: ......
Page 827: ......
Page 833: ......
Page 839: ......
Page 845: ......
Page 873: ......
Page 877: ......
Page 887: ......
Page 891: ......
Page 901: ......
Page 905: ......
Page 909: ......
Page 917: ......
Page 921: ......
Page 925: ......
Page 931: ......
Page 939: ......
Page 943: ......
Page 951: ......
Page 1002: ......
Page 1012: ...C 10 COPYRIGHT C 2001 CANON INC STANDARD FASTENERS REV 0 FEB 1992 ...
Page 1029: ...PRINTED IN U S A IMPRIME AU U S A This publication is printed on 100 recycled paper ...