Canon LBP-2000 Manuel de service télécharger pdf (Page 89)

CHAPTER 2

2 - 50

C. Using the Cassette

1. Outline

When the video controller sends the /PRNT signal to the Printer, the CPU rotates the main motor

(M101); in about 0.15 sec, it turns on the pickup clutch (CL101) to transmit the rotation of the

main motor to rotate the cassette pickup roller.

A single sheet of paper is then fed inside by the rotation of the cassette pickup roller. The paper

moves past the registration paper sensor (PI101) to reach the registration roller. At this time, the

registration roller is not rotating so that the paper stops, and arches along its leading edge for

correction of any skew. The pickup clutch (CL101) is turned off as soon as the paper arches to stop

the rotation of the cassette pickup roller. At the same time, the registration clutch (CL102) is

turned on to move the paper once again for the transfer, separation, and fixing blocks.

• Paper Path for Cassette Pickup

Figure 2-5-3

• Basic Sequence of Operation for Cassette Pickup

Main motor

(M101)

Registration clutch

(CL102)

Pickup clutch

(CL101)

Registration paper

sensor (PI101)

STBY

INTR

0.15

(unit: sec)

/PRNT signal IN

0.11 (approx.)

Figure 2-5-4

2 . Retry control

When the cassette is used as the source of paper, the cassette pickup roller is kept in contact with

the stack of paper at all times. As such, the Printer does not perform pickup retry control, but

prevents the occurrence of pickup delay jams by delaying the timing at which the pickup clutch

(CL101) is turned on.

Download Service Manual And Resetter Printer at http://printer1.blogspot.com

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Canon LBP-2000 Manuel de service Page 89