15 February 2006 TEST PATTERN PRINTING
5-13
Service
Tables
5.3.2 IPU FRONT/BACK TEST PATTERNS: SP2902-001,002
• Front side pattern (SP2902-001). Generated by the IPU in place of data
scanned from the front side of an original (CCD→SBU). Generated in the
scanner image correction circuit.
• Back side pattern. (SP2902-002. Generated by the IPU in place of data scanner
from the back side of an original (CIS→SBU). Generated in the scanner image
correction circuit.
The IPU test patterns are primarily used for design purposes. However, they can
be used as follows:
• To confirm that the IPU is processing images correctly.
• To fine tune the image processing parameters
• To help trace the causes of poor images. For example, if the IPU test patterns
are normal when the machine is producing poor quality images, then the problem
must be after the IPU.
1. Enter the SP mode, select SP2902.
2. Select 001 to print a test pattern for the front side, or select 002 to print a test
pattern for the back side.
3. Scroll then select the number of the test pattern that you want to print (see the
table below).
4. Press .
5. Press Copy Window to open the copy window, then select the settings for the
test print (paper size, etc.)
6. Press Start C to start the test print.
7. Press SP Mode (highlighted) to return to the SP mode display.
NOTE: Patterns 6, 8, 9, and 11 are the best choices for testing and confirming
the operation of the IPU.
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