Ricoh AC104, Service Documentation

Page: 142 / 160

ENGINE F/W
B173 6-12 SM
6.6 ENGINE F/W
6.6.1 FEEDING
The pick-up solenoid controls the pick-up roller drive to feed paper from the
cassette. The bypass solenoid controls the paper feed from the manual tray. You
must put the paper in front of the feed sensor when you feed from the manual
feeder.
Jam conditions are below:
Jam 0
•
Paper does not move after pick-up.
• Paper does not get to the feed sensor in time after pick-up.
•
The machine will get the paper again if the feed sensor is not set on. When the
machines tries to get the paper a second time and the feed sensor is not set on
for some time, Jam 0 shows.
•
Leading edge of the paper does not get to the feed sensor.
•
Feed sensor does not go on when the paper gets to the feed sensor. This will
show after the paper goes past the feed sensor.
Jam 1
•
The trailing edge of the paper does not go past the feed sensor after some time
(The feed sensor cannot be set off)
•
The paper cannot get to the exit sensor after the leading edge of the paper goes
past the feed sensor. (The exit sensor cannot be set on) The paper is between
the feed sensor and the exit sensor.
Jam 2
•
The paper does not pass the exit sensor after the trailing edge of the paper goes
past the feed sensor.
6.6.2 DRIVE
The main motor drives these rollers:
•
Feeding roller
•
Developing roller
• Hot roller
•
Distributing roller.
6.6.3 TRANSFER
PWM (Pulse Width Modulation) controls these:
•
Charge voltage
• Development voltage
•
Transfer voltage