Ricoh B291 Service Manual page 574

ELECTRICAL COMPONENT DESCRIPTION
1.4 ELECTRICAL COMPONENT DESCRIPTION
Symbol Name
Motors
M1 Tray
Tray Lift
M2
Sensors
Upper Lift
S1
Lower Lift
S2
Upper Paper
S3
End
Lower Paper
S4
End
S5 Upper Relay
S6 Lower Relay
Upper Paper
S7
Height 1
Upper Paper
S8
Height 2
Lower Paper
S9
Height 1
Lower Paper
S10
Height 2
Switches
Upper Tray
SW1
Lower Tray
SW2
Vertical Guide
SW3
Magnetic Clutches
Upper Paper
MC1
Feed
Lower Paper
MC2
Feed
MC3 Relay
PCBs
Main
PCB1
B542
CÓPIA NÃO CONTROLADA
Function
Drives all rollers.
Lifts the upper and lower tray bottom plates
(there are two motors in this unit, one for each
tray.
Detects when the paper in the upper tray is at
the correct feed height.
Detects when the paper in the lower tray is at
the correct feed height.
Informs the copier when the upper tray runs
out of paper.
Informs the copier when the lower tray runs
out of paper.
Detects misfeeds.
Detects misfeeds.
Detects the amount of paper in the upper tray.
Detects the amount of paper in the upper tray.
Detects the amount of paper in the lower tray.
Detects the amount of paper in the lower tray.
Informs the copier when the upper tray is set
in the machine.
Informs the copier when the lower tray is set
in the machine.
Detects whether the vertical guide is opened
or not.
Starts paper feed from the upper tray.
Starts paper feed from the lower tray.
Drives the transport rollers.
Controls the paper tray unit and
communicates with copier.
4
CÓPIA NÃO CONTROLADA
Index No.
4
15
5
11
15
12
14
13
17
16
19
18
2
3
10
7
9
6
1
SM