Test Pattern Printing - Ricoh B064 Service Manual

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TEST PATTERN PRINTING

5.3 TEST PATTERN PRINTING

5.3.1 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  or select OK.

5. Press Copy Window to open the copy window, then select the settings for the

test print (paper size, etc.)

6. Press Start  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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