Gestetner A193 Service Manual page 441

Index
Symbol
No.
S6 10 PCU
S7 29 Fusing Exit
Charge Roller H.P
S8 9
Upper Tray Paper
S9 —-
End (A193 only)
Lower Tray Paper
S10 15
End
By-pass Feed Paper
S11 16
End
Registration
S12 13
By-pass Feed Paper
S13 12
Width
S14 59 Humidity
Original Width
S15 4
Original Length-1
S16 5
Original Length-2
S17 6
Platen Cover
S18 3
Scanner H.P.
S19 1
Toner Density (TD)
S20 23
Switches
SW1 20 AC
SW2 32 Main
SW3 14 Right Vertical Guide
Upper Paper Size
SW4 —-
(A193 only)
Lower Paper Size
SW5 19
Front Door Safety
SW6 26
Magnetic Clutches
Charge Roller Contact Controls the touch and release movement of
MC1 36
MC2 42 Upper Relay
MC3 43 Lower Relay
SM
ELECTRICAL COMPONENT DESCRIPTIONS
Description
Detects when a new PCU is installed.
Detects misfeeds.
Informs the CPU when the drum charge
roller is at home position.
Informs the CPU when the upper paper tray
runs out of paper.
Informs the CPU when the lower paper tray
runs out of paper.
Informs the CPU when there is no paper in
the by-pass tray.
Detects the leading edge of the copy paper
to determine the stop timing of the paper
feed clutch, and detects misfeeds.
Detects the width of the paper in the by-pass
feed table.
Monitors the humidity around the PCU.
Detects the width of the original. This is one
of the APS (Auto Paper Select) sensors.
Detects the length of the original. This is one
of the APS (Auto Paper Select) sensors.
Detects the length of the original. This is one
of the APS (Auto Paper Select) sensors.
Informs the CPU whether the platen cover is
up or down (related to APS/ARE functions).
ARE: Auto Reduce and Enlarge
Informs the CPU when the 1st and 2nd
scanners are at the home position.
Detects the amount of toner inside the
development unit.
Supplies power to the copier.
Supplies power to operate the machine.
Cuts the +5 and +24 Vdc power lines.
Determines what size of paper is in the
upper paper tray.
Determines what size of paper is in the lower
paper tray.
Cuts the +5VLD and +24V dc power lines
and detects whether the front cover is open
or not.
the drum charge roller.
Drives the upper relay rollers.
Drives the lower relay rollers.
13-7
Note
A224