Faulty Color Reproduction - Canon iR C6800 Series Service Manual

13.3.2.8 Faulty Color Reproduction

13.3.2.8.1 Faulty Color Reproduction Caused by an Error in Primary Transfer ATVC
Cause
If the process unit is left alone for a long time in a high humidity environment, the primary transfer ATVC control
mechanism that goes on when the main power is turned on can cause electrical discharge between the primary
transfer roller and the primary transfer static eliminator. The discharge can cause the resistance of the primary
transfer roller to fluctuate. Malfunction of the primary transfer ATVC control mechanism can lead to an error
associated with E020 or can adversely affect color reproduction.
Field Remedy
Use the following service mode item to execute primary transfer ATVC controller mechanism after idle rotation of
the primary transfer roller. Execute this service mode item immediately after the control panel screen comes on (i.e.,
when the main power is turned on).
COPIER>FUNCTION>MISC P>ITR ROT
Description
The symptom is either an error associated with E020 or faulty color reproduction. Details are as follows:
E020 Error
E020 xx90
E020 xx91
E020 xxD2
E020 xxDC
xx represents the color developing assembly suffering the error in question.
00= no specific color
01= Y
02= M
03= C
Color Reproduction Fault
For instance, the faulty reproduction shows up as any of the following 3 types of image faults:
Chapter 13
0006-1872
13-59