Canon LASER CLASS 730i, Service Manual

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LASER CLASS 730i/720i/710 Chapter 2: Technical Reference
2-7
2.1 Names and Functions of Parts:
1. Paper Guide
It is used to hold down the original in horizontal direction to prevent it from moving askew.
2. Pickup Roller
The cam is rotated by the DC motor, and the document stopper moves into a free condition.
At this time, the pickup roller moves down and the document is fed.
3. Separation Roller (upper)
This roller uses differences in the coefficients of function of the document and separation
roller to separate each of the sheets in a multiple-page document.
4. Separation Roller (lower)
This roller uses differences in the coefficients of function of the document and separation
roller to separate each of the sheets in a multiple-page document.
5. Document Feed Roller
This roller feeds documents to the contact sensor after they are separated by the separation
roller.
6. Contact Sensor
Scans the image information from the document, converts it to serial data, and transmits it
to the SCNT board as an electrical signal. The contact sensor has a scanning resolution of
300 dpi.
7. Document Eject Roller
This roller ejects documents fed from the document feed roller.
8. Document Stopper
This stopper is located to the both sides of the separation rollers, and prevents document
from entering too far inside the scanning section. This stopper is located here to improve
document loading and prevent double feeding or non-feeding due to defective loading of
documents.
9. Read Motor
This motor drives all the rollers in the scanner section.
10. DC Motor
This motor rotates cams to drive the separation roller arm, thereby moving the
pickup roller up and down.
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