OVERALL MACHINE INFORMATION
B833 18 SM
3.2.2 ELECTRICAL COMPONENT SUMMARY
Motors
No. Name Description
M1 Feed Motor Drives the paper feed roller in the feed mechanism.
M2 Lift Motor Raises and lowers the bottom plate below the paper stack.
M3 Relay Motor Drives the relay rollers that feed the paper from the bypass tray into
the feed path of the LCT below.
M4 Transport Motor Drives the transport roller of the bypass tray that pulls the paper out
of the tray and sends it to the relay roller.
PCB
No. Name Description
PCB1 Bypass Unit Control Board Controls operation of all bypass unit electrical components.
Sensors
No. Name Description
S1 Lift Sensor Detects when the paper in the bypass tray is at the proper height
for paper feed.
S2 Tray Lower Limit Sensor Detects when the tray is at its lowest possible position.
S3 Paper End Sensor Informs the copier when the paper in the bypass tray has run
out.
S4 Paper Feed Sensor Detects the copy paper coming to the 4th paper feed roller and
checks for misfeeds.
S5 Paper Height Sensor 1 Paper end sensor. The paper height sensor pair (1 and 2) work
together to monitor the height of the paper stack in the bypass
tray.
S6 Paper Height Sensor 2 Paper near end sensor. The paper height sensor pair (1 and 2)
work together to monitor the height of the paper stack in the
bypass tray.
S7 Paper Length Sensor Used with the paper width switch to determine paper size. This
sensor is activated when paper is set for short edge feed. For
example, when the paper width switch detects A4 width and this
sensor is off, the machine determines A4 is set for long edge
feed. When A4 width is detected and the paper length sensor is
on, then the machine determines that A3 is loaded for short
edge feed.
S8 Relay Sensor Detects jams in the paper path after paper is fed from the feed
roller..
Solenoids
No. Name Description
SOL1 Pick-up Solenoid Controls up-down movement of the pick-up roller in the bypass
tray.
Switches
No. Name Description
SW1 Tray Lift Switch Switches the tray lift motor on and off to raise and lower the
bottom plate of the tray to the feed position. This switch must be
pressed to start paper feed.
SW2 Paper Width Switches A slide switch connected to the side fences. When the side
fences are moved to match the paper width, four feelers inside
the paper size switch slide along wiring patterns of a terminal
plate. The wire pattern detected determines the paper width.
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