Electrical Component Descriptions - Ricoh FW780 Service Manual

1.6 ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the electrical component layout on the reverse side of the Point to Point
(Water proof paper) index numbers.
Name
Motors
Main
Exhaust Fan
Original Feed
(A252 only)
Magnetic Clutches
Registration
Toner Supply
Solenoids
Pick-off Pawl
Switches
Main
Original & Paper
Feed Safety
Fusing Exit Safety
Sensors
Door Open
Toner Density
Original Registration
Light
Entrance Feed
Registration
Exit
Original Entrance
(A252 only)
Original Rear
(A252 only)
Exit Cover Open
SM
ELECTRICAL COMPONENT DESCRIPTIONS
Function
Drives all mechanical components except the
original feed section (A252only) and the fans. (DC
Motor)
Removes the ozone built up around the drum
section to the ozone filter. (DC Motor)
Drives the original feed section. (DC motor)
Drives the registration rollers.
Turns on to supply toner to the development unit.
Moves the pick-off pawls against the drum.
Supplies power to the copier.
Cuts AC power when the original or paper feed
unit is opened.
Cuts AC power when the fusing exit unit is
opened.
Indicates "Door Open" in the operation panel and
prohibits the key operation.
Detects the density of toner in the developer.
Detects when the original lead edge passes at the
front of the exposure glass.
Detects the intensity of the exposure lamp output.
Detects when copy paper is inserted (jam
detector).
Detects when copy paper arrives at the
registration rollers (jam detector).
Detects jams through the fusing exit unit.
Detects the original length and the original jam.
Detects the original jam.
Indicates "Door Open" in the operation panel and
prohibits the key operation.
1-7
Index. No.
32
5
45
30
31
6
17
18
12
29
26
4
27
24
25
7
43
44
47
A251/A252