Test Print; Engine Test Print; Controller Test Print - Canon imageCLASS X LBP1238 II Service Manual

Test Print

Engine Test Print

This machine has an engine test print function to check whether the printer engine is operating normally.
NOTE:
The engine test print can be performed by using only the DC Controller. Therefore it can be output even when the Main Controller
is failed.
There are two types of engine test print: 1-sided print and 2-sided print.
1. Load A4/LTR paper in the cassette.
2. While the machine is in the standby mode, open and close the Cartridge Door for the predetermined number of times
in a row.
• In case of 1-sided print
4 times
• In case of 2-sided print
5 times or more
3. An engine test print is executed, and the test pattern as shown below is printed on one side or both sides of a sheet
of paper.

Controller test print

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-TYPE TYPE Pattern
0 Grid Pattern
1 Halftone Pattern
2 Black Pattern
3 White Pattern
4 Gradation 17 Pattern
5 Thin Horizontal Line
Pattern
6 (For R&D use)
7 (For R&D use)
Grada- Fog- Trans-
tion ging fer fail-
ure
Yes
Yes
Yes
Yes Yes
131
Image check items
Black White Uneven
line line pitch
Yes Yes Yes
Yes Yes
Yes
Yes Yes
Yes Yes
7. Troubleshooting
Uneven Right Straigh
density angle t lines
Yes Yes
Yes
Yes
Yes
Magni-
fication
ration
Yes