Lph Chip Adjust - Konica Minolta bizhub C450 Service Manual

Field Service Ver. 1.0 Mar. 2005
10.4.10

LPH Chip Adjust

Functions • To correct chips of locations where sub scan direction white lines or black lines occur
in the LPH Pattern produced using "Test Print."
Use • White line or color line or black line occurs in the sub scan direction.
• The LPH Assy has been replaced.
• The LPH Unit has been replaced.
Adjustment 1. Call the Service Mode to the screen.
2. Touch these keys in this order: "Test Mode" → "LPH Pattern."
Procedure
3. Select "SINGLE," "HYPER," "Gradation," and "Border Line: ON."
4. Press the Start key to let the machine produce a test pattern.
5. Check the test pattern for the location, at which white lines or color or black lines in
sub scan direction occur.
6. Touch these keys in this order: "Machine" → "LPH Chip Adjust."
8. The chip boundary line on the crease (the center) of the test pattern corresponds to
"20" on the panel. Starting here count out to each side of the paper to identify each
location
1
20
39
9. Find the number on the panel, to which the location of white lines or black lines in
sub scan direction checked in step 5 corresponds.
10.Select the color (C, M, Y, or K) in which white lines or black lines in sub scan direc-
tion occur.
✽ If the lines occur only in green on the test pattern, select Y.
11.Touch the corresponding number on the panel. (It is then highlighted and the setting
value is displayed besides the highlighted number.)
12.Change the setting value using the 10-Key Pad.
✽ When a new LPH Unit has been installed, corrections can be made for up to eight
locations.
✽ Corrections for up to five locations can be made through factory adjustments. If white
lines or black lines in sub scan direction occur, therefore, corrections can therefore be
made in the field for three to eight locations.
13.Select HYPER and color.
14.Press the Start key to let the machine produce a test pattern and check for lines.
7. Fold the test pattern in half.
(with the pattern face on the outside)
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10. Service Mode
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