(2) Transfer
Items to Check before Adjustment
Pockmarks or defective transfer also occur in defects besides transfer output adjustment defects. If this happens, check the following items. If an error is not found after carrying out the following checks, adjust the output.
•Is the charger wire out of position or dirty? Are the transfer guide and roller deformed?
•Are the developer magnetic brushes contacting with the drum? Is the process unit rotating during copying? Is the toner low?
•Is the copy paper bending as it is being fed in? Is the copy paper abnormally moist?
•Is the aligning roller rotating normally?
•Is the separation output deviating from the set value?
•Is the developer bias an appropriate value?
•Is the transfer/separation charger case earthed? Is the photosensitive drum (shaft) earthed? Is the transfer/separation transformer earthed?
Caution during Adjustment
When pockmarks occur:
•If pockmarks are occurring in halftone areas, lower the transfer output value. However, note that if the transfer output value is lowered too far, the transfer performance also will be re-
duced.
When defective transfer occurs:
Increase the transfer output value under the following conditions. However, note that if the transfer output value is raised too far, pockmarks will occur.
•If defective transfer occurs even though the charger wire is not dirty.
•If thick paper is frequently used.
The adjustment code varies according to where pockmarks occur. Select the required adjust- ment code while referring to the following diagram.
Approx. 11 mm
Adjustment code Copy leading edge 
"220"
"221"
Copy trailing edge
1 - 72 | December 2002 TOSHIBA TEC |
