Paper Path - Ricoh J012 Service Manual

Paper Feed, Transport, Paper Exit
6.8.6

PAPER PATH

Here is a summary of the operation that sends paper through the printer:
1. The feed clutch energizes and engages the feed roller, then the rotation of the vertical
motor drives the feed roller.
2. Paper feed roller feeds 1 sheet from the top of the stack in the paper cassette. A friction
pad at the lip of the paper cassette prevents double-feeding.
3. The charge roller charges the transport belt. The electrostatic charge on the transport
belt keeps the paper on the transport belt.
4. The sheet feeds onto the transport belt.
5. The feeler of the trailing edge sensor depresses and switches the trailing edge sensor
on.
6. When the trailing edge sensor goes on, the carriage moves to the right of center. This
lets the 1st registration sensor detect the leading edge of the paper.
7. The 1st registration sensor also detects the right edge of the sheet when the carriage
and sensor move toward the carriage HP sensor on the right.
8. The detection of the right edge by the 1st registration sensor is used to determine the
width of the paper in the paper path.
The 1st registration sensor reads the right edge of only the 1st sheet of the print
job. Thereafter, the 1st registration sensor does not right edge for any until the
beginning of the next print job.
9. An area equal to the length of each print head gets printed when the carriage goes
across the sheet from right to left.
10. When the last line prints, the transport roller rotates only long enough to feed the length
of the last sheet.
11. The print job count increases by 1 after the paper exits.
J012/J013/J014
CÓPIA NÃO CONTROLADA
6-64
CÓPIA NÃO CONTROLADA
SM