Ricoh FT5535 Service Manual page 18

Index
Symbol
No.
M16 60
Sensors
S1 27
S2 31
S3 51
S4 107
S5 29
S6 52
S7 106
S8 30
S9 100
S10 26
S11 28
S12 28
S13 50
S14 53
S15 39
S16 20
S17 15
S18 24
S19 21
S20 45
S21 16
S22 54
FSM
Description
Side Fence Jogger Drives the side fence jogger to square the
(Duplex machines only) paper stack.
By-pass Feed Paper Informs the CPU what width paper is in the
Width by-pass feed table.
By-pass Feed Paper Informs the CPU that there is no paper in the
End by-pass tray.
Upper Tray Paper End Informs the CPU when the upper paper tray
(Non-duplex machines runs out of paper.
only)
Upper Relay Detects the leading edge of paper from the
upper tray to determine the stop timing of the
upper paper feed clutch, and detects misfeeds.
Upper Tray Upper Limit Detects the height of the paper stack in the
(A153/ machines only) upper paper tray to stop the upper tray lift
motor.
Lower Tray Paper End Informs the CPU when the lower paper tray
runs out of paper.
Lower Relay Detects the leading edge of paper from the
lower paper tray to determine the stop timing of
the lower paper feed clutch, and detects
misfeeds.
Lower Tray Upper Limit Detects the height of the paper stack in the
(A153/A156 machines lower paper tray to stop the lower tray lift motor.
only)
LCT Lower Limit Sends a signal to the CPU to stop lowering the
(LCT machines only) LCT bottom plate.
LCT Paper End Informs the CPU when the LCT runs out of
(LCT machines only) paper.
LCT Upper Limit Sends a signal to the CPU to stop lifting the
(LCT machines only) LCT bottom plate.
Registration Detects the leading edge of the copy paper to
determine the stop timing of the paper feed
clutch, and detects misfeeds.
Image Density Detects the density of various patterns on the
(ID) drum during process control.
Toner Density Detects the amount of toner inside the
(TD) development unit.
Lens Horizontal HP Informs the CPU that the lens is at the
horizontal home position.
Lens Vertical HP Informs the CPU that the lens is at the full-size
position.
Scanner HP Informs the CPU when the 1st and 2nd
scanners are at the home position.
3rd Scanner HP Informs the CPU when the 3rd scanner is at
the home position.
Original Length-2 Detects the length of the original. This is one of
the APS (Auto Paper Select) sensors.
Fusing Exit Detects misfeeds.
Platen Cover Informs the CPU whether the platen cover is up
or down (related to APS/ARE functions).
ARE: Auto Reduce and Enlarge
Toner End Instructs the CPU to add toner to the toner
supply unit, and detects toner end conditions.
2-9
Rev. 7/95
Note
FT5535/4527/4522