DRIVE SECTION
2-B-1
2 UNIT EXPLANATION
DRIVE SECTION
[1] Composition
[2] Mechanisms
*1 Independent drive mechanisms
Drive mechanisms of this machine are driven by
dedicated motors to ensure high-speed opera-
tion and to improve serviceability of the drum unit
and developing performance.
Speeds of the drum motor (M2), fixing motor
(M4), and loop roller motor (M6) are switched as
shown below according to the paper type
selected in the key operator mode, thus enhanc-
ing reliability of copying on thick paper.
7272ma2002
Scanner motor (M11)
Toner bottle motor (M13)
Drum motor (M2)
Loop roller motor (M6)
Developing motor (M3)
Fixing motor (M4)
Paper feed motor (M1)
Mecha-
nism
Driven Parts Method
Drum
drive*1
Drum, Toner guide
roller, Toner con-
veyance screw, and
Separation claw
swing
Gear drive (ded-
icated motor)
Develop-
ing
drive*1
Developing sleeve Gear drive (ded-
icated motor)
Fixing
drive*1
Fixing roller (upper) Gear drive (ded-
icated motor)
Paper
feed
drive*1
Tray 1/2/3, Vertical
conveyance roller
(middle/lower)
Gear drive (ded-
icated motor) +
Belt
By-pass/
loop
drive*1
By-pass feed roller
and ADU pre-regis-
tration roller
Gear drive (ded-
icated motor) +
Belt
Scanner
drive*1
Exposure unit, V-
mirror unit
Wire drive (dedi-
cated motor )+
Belt
Paper
exit
drive*1
Paper exit roller Gear drive (ded-
icated motor)
Paper type Motor speed
Thick paper 185 mm/s (7155/7165)
172.5mm/s (7255/7272)
Others 280 mm/s (7155/7255)
320 mm/s (7165)
345 mm/s (7272)
4
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
2-B-1 REPLACEMENT
4
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