Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 196

Alarm Code Title
34 - 0003 Image position correction
patch detection alarm 3
3
3-170
A. movement /B. cause /C. measures
Movement: None
Cause:
The volume of image position correction patch pattern
detection data is insufficient.
• The patch image is not formed. / The density is low.
1. Check whether a color image is formed correctly for
4 colors.
a. Perform test print in the following condition.
COPIER>TEST>PG>TYPE: 5
Output one sheet for each color in the paper of
LTR/A4/A3 size (more than 290mm in a horizontal
scanning direction).
b. Check the following points.
• Check whether the image is formed in the printing
field except a margin. Check whether the image
density is not low.
• Check whether an unexpected image is not formed.
(Check whether color displacement has not occurred
in a vertical scanning direction.)
If a correct image is not formed, take measures to be
taken for prevention of an image failure. (Check the
developing assembly and drum unit.)
• Check whether a cleaning failure has not occurred.
(Check whether the previous image does not
remain.)
If a cleaning failure is found, check the ITB cleaning
unit.
3. Replace the drum ITB driver PCB.
Alarm Code Title
34 - 0004 Image position correction Movement: None
patch correction alarm 1 Cause: The correction amount of the skew correction
motor has exceeded the limit.
• Failure of the laser scanner unit
• Failure of installation of the laser scanner unit
• Incorrect detection by the registration sensor
Measures:
1. Check whether a color image is formed correctly for
a. Perform test print in the following condition.
b. Check the following points.
• Check whether there is color displacement in a
2. Check whether there are a lot of scratches or dents
34 - 0005 Image position correction Movement: None
patch correction alarm 2 Cause: The vertical scanning direction writing
correction limiter has been exceeded.
• Incorrect detection by the registration sensor
• Patch image failure
Measures:
1. Check whether a color image is formed correctly for
a. Perform test print in the following condition.
b. Check the following points.
• Check whether an unexpected image is not formed.
2. Check whether there are a lot of scratches or dents
A. movement /B. cause /C. measures
(Scratches on the belt)
4 colors.
COPIER>TEST>PG>TYPE: 6
Output one sheet for each color in the paper of
LTR/A4/A3 size (more than 290mm in a horizontal
scanning direction).
horizontal scanning direction based on the Bk
standard, and check whether there is a color which is
extremely displaced. Replace the laser scanner unit
for the color in which significant color displacement
occurred.
on the ITB or not. If there are a lot of them and this
alarm occurs frequently, replace the ITB.
(Scratches on the belt)
4 colors.
COPIER>TEST>PG>TYPE: 6
Output more than 2 sheets of A3-size paper
consecutively. Or, output 4 sheets of A4-size paper
consecutively.
(Color displacement in a vertical scanning direction)
If a correct image is not formed, take measures to be
taken for prevention of an image failure. (Check the
developing assembly and drum unit.)
on the ITB or not. If there are a lot of them and this
alarm occurs frequently, replace the ITB.