Symbol Name Function Index No.
M21
Wire cleaner Drives the wire/grid cleaner
44
Fan Motors
FM1
Fusing exhaust Removes heat from around the fusing unit.
49
FM2
Charge inlet Provides air flow around the drum charge
section.
48
FM3
Inner cooling Provides air flow around the toner tank and
development units.
57
FM4
IPU cooling Provides air flow around the IPU board.
52
FM5
Polygon motor
cooling
Provides air flow around the polygon motor.
53
FM6/7
Transport Sucks in air to attract copy paper to the
transport belts.
55/54
FM8/9
Development exhaust Removes air and heat from around the drum
and development units.
58/59
FM10
Optics exhaust Exhausts air from under the lens housing
cover.
51
FM11
LD cooling Provides air flow to the LD unit.
50
FM12/13
Optics cooling Blows air into the optics cavity.
60/61
FM14
DC power supply
cooling
Provides air flow to transformers and
radiation plates on the dc power supply
board.
56
Sensors
S1
By-pass feed table Detects whether the by-pass feed table is
open or closed.
73
S2
Oil end Detects whether the silicone oil tank is
nearly empty or not.
91
S3
Exit Detects misfeeds.
100
S4
Transfer belt position Detects whether the transfer belt is in
contact with the drum or not.
67
S5
Humidity Detects humidity and temperature to
calculate the absolute humidity.
88
S6
Drum potential Detects the drum surface potential.
125
S7
M - Toner density Detects the toner density in the M
development unit.
97
S8
Y - Toner density Detects the toner density in the Y
development unit.
96
S9
Bk - Toner density Detects the toner density in the Bk
development unit.
101
S10
C - Toner density Detects the toner density in the C
development unit.
98
S11
Transport Detects misfeeds.
95
S12
Registration Detects the leading edge or trailing edge of
the copy paper to control the rotation of the
paper feed and registration rollers.
74
S13
Registration guide set Detects whether the registration guide plate
is set or not.
70
A172/A199 1-16 SM
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