Electrical Component Descriptions - Ricoh FT7770 Service Manual

30
April, '89

ELECTRICAL COMPONENT DESCRIPTIONS

Motor
Tray Motor (M-l):
Magnetic Clutch
Paper Feed (MC-l):
Sensors
Overrun (S-6):
Paper End (S-7):
Paper Feed (S-8):
Paper Volume (S-9):
Paper
Size-Legal (S-l):
Paper Size-Letter (S-2):
Paper size-B4 (S-3):
Size-A4 (S-4):
Paper
Size-B5 (S-5):
Paper
Tray Lift (S-11):
Tray Down (S-10):
Switches
Access Cover Safety (SW-l):
Tray Button (SW-2):
Others
Tray Button Indicator
(O-l):
Tray Heater (O-2):
Moves the tray up and down.
Drives the paper feed rollers.
Senses when the tray is above the feed
position. The tray moves down until the
overrun sensor turns off.
Detects the presence of paper in the tray.
Turns off the paper feed clutch: also,
serves as a jam detector.
Senses the amount of paper in the tray.
Senses when legal size paper is in the
tray.
Senses when letter size paper is in the
tray.
Senses when B4 paper is in the tray.
Senses when A4 paper is in the tray.
Senses when B5 paper is in the tray.
Turns off the tray motor when the tray
reaches the up (feed) position.
Turns off the tray motor when the tray
reaches the down position.
Safety switch
Lowers the tray bottom plate.
Blinks when the tray is moving up or
down. Remains lit when the tray reaches
the down position.
Removes humidity from the paper in tray.
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