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Measures for staple alignment failure (Staple-Q1/Saddle-AF2/AJ2/
AK2/AM2/AN2/Booklet-Q1/Finisher-AF1/AJ1/AK1/AM1/AN1)
[Symptom/Question]
When printing multiple stapled sets, the last sheet of each set may be misaligned by 2 mm or more and stapled with being
misaligned.
There are reports from the field that alignment failure occurs in 6 to 9 sets when approx. 100 sets are stapled.
Misalignment of the last sheet occurs on the outer side of the set as shown in the photo [A] or on the inner side of the set as
shown in the photo [B].
[Reference] The specification of staple misalignment is within 2 mm
[Cause]
The following are the three factors, which may cause staple misalignment. In addition, only the last sheet may be stapled with
being misaligned, since there is no paper to be delivered after the last sheet, thus no lead-in operation and alignment operation
for next feeding paper be performed.
A). Insufficient gap between alignment plate and paper
When pulling the paper back to the process tray of finisher with paddle and feed belt, the paper does not feed smoothly to the
trailing edge push-on plate of the process tray if the gap between the alignment plate and the paper is small. As a result, staple
misalignment may occur.
B). Insufficient feeding force of paddle
C). Insufficient feeding force of feed belt
The paper may not be pulled back to the trailing edge push-on plate in some cases due to insufficient feeding force caused by
the height of paddle and feed power. As a result, staple misalignment may occur.
Mechanism of only the last sheet of paper being misaligned and stapled:
In addition to the cause mentioned above, below is information on why only the last sheet is misaligned.
When the sheets in middle (up to the second sheet to last sheet of each staple job) are misaligned, it will be aligned by being
included in pull-back and alignment process of the next paper. Since there is no page available after the last paper, if the second-
to-last sheet has misalignment, it does not go through pull-back and alignment process of next paper. Therefore, staple
misalignment may occur only the last sheet.
[Remedy/Answer]
Follow the steps below and perform the service work in the field.
A). Adjusting Alignment Plate Position
The purpose of alignment plate position adjustment is to set the alignment plate in correct position because the paper does not
feed smoothly to the trailing edge push-on plate if the gap between the alignment plate and the paper is small.
A-1) Turn ON the power of the host machine to be on standby.
A-2) Open the front cover and put the door switch tool into the door switch.
A-3) Remove the switch cover.
A-4) In the case of A-configuration size, set DIP SW382 on the switch PCB as shown in the figure [A], and in the case of L-
configuration size, set it as shown in the figure [B].
[Reference] In the case of A-configuration size, switch on SW1 and SW6. In the case of L-configuration size, switch on SW1,
SW6 and SW8.
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