Read Sharp MX-6201N / MX-7001N (serv.man36) Service Manual online
MX-7001N DEVELOPING SECTION L – 2
2. Operational descriptions
Electrostatic latent images generated on the OPC drum by the
laser (writing) units (laser image ray) are converted into visible
images by toner.
laser (writing) units (laser image ray) are converted into visible
images by toner.
Toner and carrier in the developing unit are stirred and transported
by the mixing roller.
By mixing and transporting, toner and carrier are negatively
charged due to mechanical friction.
The developing bias voltage (AC component and negative DC
component) is applied to the developing roller.
Negatively charged toner is attracted to the exposed section on the
OPC drum where the negative potential falls due to the developing
bias.
If the OPC drum is not exposed, the negative potential is higher
than the developing bias voltage, and toner is not attracted.
by the mixing roller.
By mixing and transporting, toner and carrier are negatively
charged due to mechanical friction.
The developing bias voltage (AC component and negative DC
component) is applied to the developing roller.
Negatively charged toner is attracted to the exposed section on the
OPC drum where the negative potential falls due to the developing
bias.
If the OPC drum is not exposed, the negative potential is higher
than the developing bias voltage, and toner is not attracted.
3. Disassembly and assembly
A. Development unit (CL)
(1) Development unit (CL)
Signal
Name
Function/Operation
BS_C
Developer bias (C)
Developer bias
BS_K
Developer bias (K)
BS_M
Developer bias (M)
BS_Y
Developer bias (Y)
DVCM
Developer drive motor_CL
Drives the development section (CL)
DVKM
Developer drive motor_K
Drives the developement section (K) /Drives the separating operations of the primary transfer belt
HTCS_K
Hopper remaining sensor_K
PTMH_1
Intermediate hopper motor
Transports the toner
PTMH_2
Stirring motor
Stirs the toner
TCS_C
Toner density sensor (C) (ATC)
Detects the toner density in the developing unit
TCS_K
Toner density sensor (K) (ATC)
TCS_M
Toner density sensor (M) (ATC)
TCS_Y
Toner density sensor (Y) (ATC)
No.
Name
Function/Operation
1
Developer roller
Latent electrostatic images on the OPC drum are changed to visible images
2
Stirring roller
Stirring developer
3
Toner filter
Prevents dispersing of toner
4
DVK DRIVER PWB
Controls the toner stirring motor
Unit
Page
A
Development unit (CL)
L - 2
B
Development unit (BK)
L - 7
Unit
Parts
Mainte
nance
Page
1
Development
unit (CL)
unit (CL)
a
Developer (C/M/Y)
▲
L - 4
b
DV seal (CL)
▲
L - 6
c
DV side seal F (CL)
▲
d
DV side seal R (CL)
▲
e
Toner density sensor (ATC)
–
L - 6
f
Toner filter (CL)
▲
L - 6
Unit
1
Development unit (CL)
1-a
1-c
1-b
1-f
1-e
1-d
1
1
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