Symbol
Name
Function
Index No.
SW3
1st Paper Size
Switch
Determines what size paper is in the
cassette.
18
SW4
2nd Paper Size
Switch-1 (Upper)
Determines what size paper is in the upper
paper tray.
50
SW5
2nd Paper Size
Switch-2 (Lower)
Determines what size paper is in the upper
paper tray.
50
SW6
Color Switch
Determines which color development unit is
installed.
12
SW7
Manual Feed Table
Switch
Detects when the manual feed table is open.
11
SW8
Right Cover Switch
Detects when the right cover is open.
16
SW9
3rd Paper Size
Switch-1 (Upper)
Determines what size paper is in the lower
tray. (FT4222 copier only)
48
SW10
3rd Paper Size
Switch-2 (Lower)
Determines what size paper is in the lower
tray. (FT4222 copier only)
48
SW11
Platen Cover
Closed Switch
Detects when the platen cover or the
document feeder is closed.
(FT4222 copier only)
35
Sensors
S1
Scanner Home
Position Sensor
Informs the CPU when the 1st scanner is at
the home position.
1
S2
Lens Home
Position Sensor
Informs the CPU when the lens is at the
home position (full size position).
2
S3
4th/5th Mirror Home
Position Sensor
Informs the CPU when the 4th/5th mirrors
assembly is at the home position (full size
position).
7
S4
Registration Sensor
Detects misfeeds.
22
S5
Exit Sensor
Detects misfeeds.
33
S6
1st Paper End
Sensor
Informs CPU when the cassette runs out of
paper.
19
S7
2nd Paper End
Sensor
Informs CPU when the upper paper tray
runs out of paper.
55
S8
Color Toner End
Sensor
Detects when it is time to add toner for the
color development unit.
8
S9
Paper Lift Sensor
Detects the correct feed height of the
cassette.
21
S10
Image Density (ID)
Sensor
Detects the density of the image on the
drum to control the toner density.
25
S11
Auto Image Density
Sensor (ADS)
Senses the background density of the
original.
29
S12
3rd Paper End
Sensor
Informs CPU when the lower paper tray runs
out of paper. (FT4222 copier only)
52
S13
Relay Sensor
Detects misfeeds. (FT4222 copier only)
20
S14
Platen Cover
Position Sensor
Detects when the platen cover is positioned
about 10 cm (4") above the exposure glass.
(FT4222 copier only)
61
STM
1-13
FT4220/4222
Summary of Contents for FT4215
Page 1: ...FT4220 4222 4215 SERVICE TRAINING MANUAL ...
Page 12: ...SECTION 1 OVERALL MACHINE INFORMATION ...
Page 28: ...8 AC POWER AND DC POWER DISTRIBUTION FT4220 4222 1 16 STM ...
Page 31: ...SECTION 2 DETAILED SECTION DESCRIPTIONS ...
Page 114: ...SECTION 3 DOCUMENT FEEDER ...
Page 138: ...SECTION 4 SORTER ...
Page 157: ...SECTION 5 DUPLEX ...