Drive Section; Composition; Mechanisms - Minolta Di551 Service Manual

DRIVE SECTION

[1] Composition

Scanner motor (M11)
Toner bottle motor (M13)
Developing motor (M3)
Loop roller motor (M6)
Paper feed motor (M1)

[2] Mechanisms

Mechanism Driven Parts
Drum Drum, Toner guide
drive*1 roller, Toner con-
veyance screw, and
Separation claw
swing
Developing Developing sleeve Gear drive (dedi-
drive*1
Fixing Fixing roller (upper) Gear drive (dedi-
drive*1
Paper feed Tray 1/2/3, Vertical
drive*1 conveyance roller
(middle/lower)
By-pass/ By-pass feed roller
loop drive*1 and ADU pre-regis-
tration roller
Scanner Exposure unit, V-
drive*1 mirror unit
Paper exit Paper exit roller
drive*1
*1 Independent drive mechanisms
Method
Gear drive (dedi-
cated motor)
cated motor)
cated motor)
Gear drive (dedi-
cated motor) + Belt
Gear drive (dedi-
cated motor) + Belt
Wire drive (dedi-
cated motor )+ Belt
Gear drive (dedi-
cated motor)
2-B-1
Drum motor (M2)
Fixing motor (M4)
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.
Paper type Motor speed
Thick paper 185 mm/s
Others 280 mm/s
320 mm/s
DRIVE SECTION
55-cpm
65-cpm