Adf Sub Zoom - Konica Minolta bizhub C25 Service Manual

13. SERVICE MODE
13.4.5

ADF SUB ZOOM

A. Use
• To adjust for variations in the accuracy of all parts and their mounting accuracy by vary-
ing the scanning zoom ratio in the sub-scanning direction (1-side) when using the Auto-
matic Document Feeder
• When the original glass is replaced.
• When a new Auto Document Feeder Unit is mounted
NOTE
After the [CIS SUB ZOOM] adjustments have been performed
• Adjust the length of E in the copy of the test pattern so that the following specification is
met.
• 200 ± 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 [ADF SUB ZOOM], and press the Select key.
4. Place the test pattern1 on the original glass and make a test copy
5. Select [TEST COPY] and press the Select key to 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.
6. Check that the width of E in the copy of the test pattern1 meets the specification.
Calculation: (1 - Width of E in the document  Width of E in the copy)  100
If the width of E is out of specification, adjust it according to the following procedure.
7. Select [ADJUST], and press the Select key.
8. Using the / key, change the setting value and then press the Select key
9. 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.
140
E
-2.0% ~ "0%" ~ +2.0%; step: 0.4%
Field Service Ver. 1.1 May 2011
4139F3C549DA