Color Registration Adjustment - Konica Minolta bizhub C450 Service Manual

10. Service Mode
10.4.8

Color Registration Adjustment

A. Black
Functions • To correct black color shift, if it occurs with plain or thick paper.
• Make Color Registration Adjustment (cyan, magenta, and yellow) after this adjust-
ment has been made.
Use • To correct black color shift, if it occurs
• The LPH Assy (K) has been replaced.
Adjustment
Range
Adjustment If the black reference line deviates in the direction of C, decrease the setting value.
Instructions If the black reference line deviates in the direction of D, increase the setting value.
Adjustment 1. Call the Service Mode to the screen.
2. Touch these keys in this order: "Machine" → "Color Registration Adjustment."
Procedure
3. Load Tray 1 with A3 or A4 paper (plain or thick).
4. Press the Start key.
5. Fold the printed test pattern in half lengthwise to check for deviation (the image on
the inside).
6. Check deviation between black lines A and B.
7. Select the paper type.
8. Select black.
9. Change the setting value using the +/- key as necessary.
10.Produce another test pattern and check for deviation.
Check Procedure
Check point A, B
234
"0" (-10 to +10 dot)
A
B
Direction of C
A
B
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Field Service Ver. 1.0 Mar. 2005
If the black reference line
deviates in the direction of
C, decrease the setting
value.
If the black reference line
deviates in the direction of
D, increase the setting
value.
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Direction of D
B
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A