15 February 2006 TEST PATTERN PRINTING
5-15
Service
Tables
5.3.3 IPU PRINTING TEST PATTERN: SP2902-004
This test pattern is generated in the application input processing circuit in the IPU.
The operation path is as follows:
Application input → Memory → Printer
This test pattern is primarily used for design purposes, but it can also be used to
trace the source of problems beyond the IPU (in the application input or BICU)
which are causing poor print quality.
1. Enter the SP mode and select SP2902-004.
2. Enter the number for the test pattern that you want to print and press . (See
the table below.)
No. Pattern
0 Off
1 Vertical Grayscale 20
2 Horizontal Grayscale 40
3 Horizontal Grayscale 20
4 Horizontal Grayscale 25
5 Caterpillar
3. When you are prompted to confirm your selection, press Yes to select the test
pattern for printing.
4. Press Copy Window to open the copy window, then select the settings for the
test print (paper size, etc.)
5. Press Start C twice (ignore the “Place Original” messages) to start the test
print.
6. Press SP Mode (highlighted) to return to the SP mode display.
7. Switch the machine off and on.
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