Adjust; Cis Main Zoom - Konica Minolta bizhub C25 Service Manual

13. SERVICE MODE

13.4 ADJUST

13.4.1

CIS MAIN ZOOM

A. Use
• To adjust for variations in the accuracy of IR parts and their mounting accuracy by vary-
ing the scanning zoom ratio in the main scanning direction.
• When the scanner unit has been replaced.
• Adjust the width of D in the copy of the test pattern1 so that the following specification is
met.
• 100 ± 0.5% (Zoom Ratio = Full Size:100%)
B. Procedure
• The default setting is 0%.
1. Print the test pattern1.
See P.155
2. Enter the [ADJUST] menu in the service mode.
3. Select [CIS MAIN ZOOM] of [ADJUST] and press the Select key.
4. Place the test pattern1 on the original glass and make a test copy.
NOTE
• The test pattern1 should be positioned vertically.
• Use A4 or Letter paper loaded into tray1 to make the test copy.
5. Check that the width of D in the copy of the test pattern1 meets the specification.
Calculation: (1 - Width of D in the document  Width of D in the copy)  100
If the width of D is out of specification, adjust it according to the following procedure.
6. Press the Select key.
7. Using the / key, change the setting value and then press the Select key.
8. Place the test pattern1 on the original glass. Then, make a test copy again and check it.
<Adjustment instructions>
If the width of D in the test pattern is longer than the specified width.. Decrease the setting.
If the width of D in the test pattern is shorter than the specified width.. Increase the setting.
136
D
-2%~ +2%; step: 0.2%
Field Service Ver. 1.1 May 2011
4139F3C548DA