Drum Unit; Composition - Konica Minolta 7145 Service Manual

3. DRUM UNIT

3.1

Composition

[7]
[6]
[5]
Symbol Name
TSL
[1]
(Transfer synchronization lamp)
Transfer corona unit
[2]
[3] Paper entrance guide plate
[4] Drum
[5] Developing unit
[6] Charging corona unit
[8] [9]
[4] [3] [2]
Separation support
LED
Transfer of toner from the drum to paper
DC positive corona discharge *1
Wire discharge: Tungsten wire with oxide film (φ 0.06mm)
With manual wire cleaning mechanism provided
Constant current DC output range: 0 to 350 µA
Conveyance guide for paper supplied
High voltage applied to prevent toner adhesion: -500VDC
(constant voltage)
Image formation base
OPC drum (φ 60mm)
Formation of a toner image on the drum
(See "4. Developing unit".)
Application of electric charge on the drum surface
DC corona discharge (Scotron)
Wire discharge: Gold-plated skin-pass tungsten wire
(φ 0.06mm)
With manual wire cleaning mechanism provided
Constant current DC output range: -320 to -1000 µA
Grid bias: Charging control plate
Constant current DC output range: -450 to -1090V
2-11
[10]
SD7
M1
HV
[1]
TCSB
Function or method
DRUM UNIT
CB
2