ELECTRICAL COMPONENT DESCRIPTIONS17 May, 1999
1.5 ELECTRICAL COMPONENT DESCRIPTIONS
Refer to the electrical component layout on the reverse side of the point-to-point
diagram for the location of the components, using the symbols and index numbers.
1.5.1 COPIER ENGINE
SymbolNameFunctionIndex No.
Motors
M1ScannerDrives the 1st and 2nd scanners.4
M2Polygonal MirrorTurns the polygonal mirror.28
M3MainDrives the main unit components.12
M4Exhaust FanRemoves heat from around the fusing unit.46
Magnetic Clutches
MC1Paper FeedStarts paper feed from the tray.14
MC2By-pass FeedStarts paper feed from the by-pass table.15
MC3Vertical TransportDrives the vertical transport rollers.18
MC4RegistrationDrives the registration rollers.13
Switches
MainProvides power to the machine. If this is
SW1off, there is no power supplied to the40
machine.
SW2Right Door Switch 1Cuts the +5 V LD dc power line.30
Right Door Switch 2Detects if the front door is open or not, and
SW3cuts the +24 V dc power line for the31 main
motor and power pack.
Vertical TransportDetects if the front door is open or not, and
SW4Cover Switchcuts the +24 V dc power line for the25 vertical
transport clutch.
SW5Paper SizeDetects paper size.24
Sensors
Scanner HPInforms the CPU when the 1st and 2nd
S13
scanners are at home position.
Original WidthDetects original width. This is one of the
S237
APS (Auto Paper Select) sensors.
Original Length 1Detects original length. This is one of the
S36
APS (Auto Paper Select) sensors.
Original Length 2 Detects original length. This is one of the
S46
APS (Auto Paper Select) sensors.
S5Toner Near-EndDetects toner near-end.21
Paper EndInforms the CPU when the tray runs out of
S623
paper.
Paper Near-EndInforms the CPU when the paper in the
S7tray is almost finished. The printer19
controller uses this sensor.
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