4.Troubleshooting for Peripheral Units
829
Delivered Sheets Are Not Aligned (Stacker Tray)
Cause:
When sheets are delivered to the stacker tray, because of paper-to-paper friction, the paddle fails to pull
the trailing edge back into the front guide, resulting in misalignment. The paper edge stopper also fails
to push back the protruding leading edge. This is likely to occur if Thick (280 g/m2 [105 lb. Cover] or
heavier), uncurled A3 or larger paper is used.
Here is a detailed description of how this problem can occur.
1. An uncurled sheet is delivered to the stacker shift tray.
2. Strong friction occurs at the trailing edge so that the paddle cannot pull the sheet back and align
the edges of the sheet with those of the stack.
3. The paper edge stopper fails to push back the protruding leading edge and align the sheet as
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