Canon imageRUNNER ADVANCE C3330 Series, Troubleshooting Manual, Page: 136 / 200

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020A jam cord due to the deformed 2nd delivery upper guide
[Symptom]
In the machines prior to the Countermeasure cut-in serial number in factory described below 020A jam may occur.
020A : Reverse Sensor Stationary jam
[Cause]
The backup sheet metal [2] generally contacts with the 2nd delivery upper guide [1] to prevent deformation. However, some
backup sheet metal [2] that was deformed by the failure during the manufacturing process and would not come in contact with
the guide was mixed in. Therefore, there is a possibility that the 2nd delivery upper guide may be deformed and the gap between
the guide may be extended. In that case, the sensor flag [3] of the reverse sensor may rotate in the direction of [a], and the feeding
paper [4] may caught by the sensor flag to cause the above-mentioned symptom.
[Service work]
When the above-mentioned symptom occurs, take Countermeasure A or Countermeasure B below.
Countermeasure A
1) Press down the backup sheet metal to come in contact with the 2nd delivery upper guide.
2) Measure the distance between the reference point [A], the lower section of the 2nd delivery upper guide, and the reference
point [B], the upper section of the delivery outlet, with a scale to confirm that the distance is within the standard range listed on
the table below. If it is out of the standard range, perform the work again.
Measured position Rear side [a] Around the center [b] Near side [c]
Standard range (mm) 30-31 25.5-26.5 30-31
[Attention] Measure the distance by placing the scale perpendicularly.
Countermeasure B
Attach as many support sheets (FL1-2468-000), that was newly set as a service part, to the support [a] of the backup sheet metal
as required until there is no gap between the 2nd delivery upper guide.
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