Color Registration; Check The Occurrence Of Color Registration Errors; Judgment For Type Of Color Registration Error - Ricoh MP C3004 Field Service Manual

4. Replacement and Adjustment
4. Turn the machine's power off and then back on.
The changed gamma correction setting is applied.
5. Check the output image and repeat steps 1 - 4 until the desired image is obtained.

Color Registration

Adjust color registration with the following procedure when color registration errors occurred.

Check the occurrence of color registration errors

Prepare some A3 sheets.
1. Execute SP2-111-004 (Forced line Position Adj.: Mode d)
2. Make sure that execution completed successfully with using SP2-194-007 (MUSIC).
If the value of SP2-194-007 is "0", it indicates that the result of SP2-111-004 was successful.
If the value of SP2-194-007 is "1", it indicates that the result of SP2-111-004 was a failure, which
you need to fix the color registration errors (See "Ways to fix color registration errors" page 740

"Judgment for type of color registration error").

3. Execute SP2-109-003 (Test Pattern: Pattern Selection)
4. With a loupe, check the details of the color registration errors on the printed test pattern
(page 740 "Judgment for type of color registration
• Specification: Main/Sub is smaller than 180.0um
• No color registration errors: Adjustment completed.
• Color registration errors occurred: Adjust the color registration errors (See "Ways to fix color
registration errors" page 740 "Judgment for type of color registration error")
Judgment for type of color registration error
In the following diagrams, solid lines represent "K" and dotted lines indicate any of "C", "M" or "Y".
1. Pattern 1
This is a case in which there is a shift in the sub-scan direction at the leading edge of the paper. The
following diagram shows "C", "M" or "Y" lines closer to the leading edge than "K" lines.
740
error").