Roll Units - Ricoh D124-17 Service Manual

6. Troubleshooting

Roll Units

No.
1 Bypass Sensor
2 Pre-Registration Sensor
3 Roll Unit Exit Sensor
4 Paper Entrance Sensor
5 Paper Feed Clutch
6 Roll Feed Motor
7 Roll Rewind Switch
674
Component
Detects the trailing edge of the cut sheet manually inserted into
the main machine for bypass feed.
Located at the top of the vertical paper feed path in the main
unit, detects the leading edge of paper roll paper.
Detects the leading edge of the roll paper as it leaves the roll
unit.
Detects the edge of the roll paper when it leaves the roll unit
and enters the main paper path.
Engages and disengages the cam shaft that raises and lowers
the roll feed roller idle rollers in the roll unit. This closes and
opens the nip of the roll feed roller.
Drives the roll paper feed roller that feeds the roll paper from
the roll unit.
Located on the inside cover of the right end of Roll Unit 1.
Depressing the switch rewinds the paper onto the paper roll.
Function