Test Print; Overview; Steps To Select A Test Print Type - Canon imageRUNNER ADVANCE C255 Series Service Manual

Test Print

Overview

The following test print types are available with this machine, and you can check for failure of an image with a circle 'Yes' described
in the image check items in the table below. When no failure is found in the test print in normal output mode, it can be caused in
PDL input or Reader.
The image of the test print is generated by the Main Controller PCB.
PG Pattern
TYPE
Grada-
tion
0 Normal
copy/print
1 to 3 For R&D
use
4 16 grada- Yes
tions
5 Full page
halftone
6 Grid
7 to 9 For R&D
use
10 YMCBk
horizontal
stripes
(vertical
scanning
direction)
11 For R&D
use
12 YMCBk Yes
64 grada-
tions
13 to 100 For R&D
use

Steps to Select a Test Print Type

1. Set the number of sheets, paper size, etc. in the following service mode.
COPIER > TEST > PG > PG-PICK: Setting of the test print paper source
COPIER > TEST > PG > 2-SIDE: Setting of the duplex mode of PG
COPIER > TEST > PG > PG-QTY: Setting of the number of PG sheets
2. Select COPIER > TEST > PG > TYPE, enter the TYPE number of the test print to be output using the numeric keypad,
and then press the OK key.
3. Select the color to be output from the following service mode items, enter 1 using the numeric keypad, and then
press the OK key.
COPIER > TEST > PG > COLOR-Y: Y
COPIER > TEST > PG > COLOR-M: M
COPIER > TEST > PG > COLOR-C: C
COPIER > TEST > PG > COLOR-K: Bk
Fogging Transfer Black
failure line (col-
ored
line)
Yes
Yes Yes
Yes
Yes
Image check item
White Uneven Uneven
line density density
at regu- (rear/
lar inter- front)
vals
Yes
Yes Yes
Yes
Yes
321
6. Troubleshooting
Right Linearity
angle
accura-
cy
Yes
Yes
Yes Yes
Yes
Color
dis-
place-
ment
Yes