Delay Jams; Stationary Jams; Other Jams; Cassette Pickup - Canon LBP3300 Series Service Manual

Table of Contents

2.5.2.2 Delay Jams

2.5.2.2.1 Pick-up delay jam

The printer performs the retry control, which executes pick-up operation twice, in order to relief the pick-up delay jam caused by pick-up error.

When the top of page sensor (PS912) cannot detect the leading edge of the paper within approx. 2.7 sec. (3.4 sec. for the optional cassette) after when the pick-up

solenoid (SL1) is turned ON, the CPU retries the pick-up operation twice. The CPU determines a pick-up delay jam, when the top of page sensor (PS912) cannot

detect the leading edge again within another approx. 2.7 sec. (3.4 sec. for the optional cassette).

2.5.2.2.2 Delivery delay jam

The CPU determines the delivery delay jam, when the leading edge of the paper does not reach the delivery sensor (PS915) within approx. 1.8 sec. after when the

top of page sensor (PS912) detects the leading edge.

2.5.2.2.3 Reversing delay jam

The CPU starts the reversing delay jam detection after it determined no wrapping jam.

The CPU determines the reversing delay jam, when the delivery sensor (PS915) does not detect the absence of paper at all within approx. 0.6 sec. after when the

top of page sensor (PS912) detects the trailing edge of the paper.

2.5.2.3 Stationary Jams

2.5.2.3.1 Pick-up stationary jam

The CPU determines the pick-up stationary jam, when the top of page sensor (PS912) cannot detect the trailing edge of the paper within approx. 3.1 sec. after de-

tecting the leading edge.

2.5.2.3.2 Delivery stationary jam

The CPU starts the delivery stationary jam detection after it determined no wrapping jam.

The CPU determines the delivery stationary jam, when the delivery sensor (PS915) does not detect the absence of the paper within approx. 1.8 sec. at all after the

top of page sensor (PS912) detected the trailing edge

2.5.2.3.3 Reversing stationary jam

The CPU determines the reversing stationary jam, when the top of page sensor (PS912) does not detects the trailing edge of the paper within approx. 2.9 sec. after

when the reversing sensor (PS915) detects the leading edge of the paper.

2.5.2.4 Other Jams

2.5.2.4.1 Wrapping jam

The CPU starts the wrapping jam detection after it determined no delivery delay jam.

The CPU determines the wrapping jam, when the delivery sensor (PS915) detects the absence of paper after 0.1 sec. after when the delivery sensor (PS915) detests

the leading edge of the paper, and within approx. 1.4 sec. after when the top of page sensor (PS912) detects the trailing edge of the paper.

2.5.2.4.2 Start-up residual jam

The CPU determines the start-up residual jam, when the top of page sensor (PS912) or the delivery sensor/reversing sensor (PS915) detects a print paper upon the

initial rotation period is started.

2.5.2.4.3 Door open jam

The CPU determines the door open jam, when the top of page sensor (PS912) or the delivery sensor/reversing sensor (PS915) detects a paper upon the door open

is detected.

2.5.3 Cassette Pickup

2.5.3.1 Cassette pick-up

The cassette pick-up picks a print paper in the cassette up one by one into the printer.

The cassette paper out detection sensor detects the presence of print paper in the cassette.

The inclined wall separation and the pad separation are utilized to prevent a multiple-feed of paper.

The cassette pick-up operation is explained in the following.

1) The engine controller rotates the main motor (M1) when the video controller inputs the print command.

2) When the initial rotation gets ready (Note), the cassette pick-up solenoid (SL1) turns ON for approx. 0.2 sec. Accordingly, the rotation of the main motor is

transferred to the pick-up roller to be rotated.

3) The print paper is at the position to be picked up by the lifting plate, which pushed up according to the spring force. One print paper is picked up by the pick-up

roller rotation and fed into a printer. At that time, the multiple-fed paper is removed by the inclined wall

separation and the pad separation.

Initial rotation ready

A condition of the main motor drives, the fixing unit temperature reaches a prescribed temperature, and the scanner motor reaches its prescribed rotational count

after a specified time interval.