Service Manuals, User Guides, Schematic Diagrams or docs for : Minolta Copiers CF3101 8031053wone
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5. IU Section
1. Improvements from 7920
2. Component Identification
3. PC Drum
4. PC Drum Charge Corona
5. Developing Unit
6. Cleaning Unit and Main Erase
7. Layout of Terminals
8. Development System
9. Operation for New IU
5.1 Improvements
Developing 2-component Magnetic Brush Developing
System (Non-contact)
PC Drum OPC (High Sensitivity type is used for high
copying speed)
IU Life C,M,Y: 52K
Bk: 82K
Drum Charge Manual Cleaning Mechanism for Comb
Cleaning Electrode
Mechanism (For a longer IU life)
Main Eraser Attached to LPH Assembly
(Productivity increase in IU)
Ds 0.3 mm
Ds: Gap between PC Drum & Mg. Roller
5.2 Component Identification
Cleaning Blade
PC Drum
Toner Conveying Coil
Developing Unit
PC Drum Charge Corona
Main Erase (Copier Side)
5.3 PC Drum
Drive Motor PC Drum
Shaft Coupling
Planetary Roller Section
5.4 PC Drum Charge Corona
PC Drum Charge Corona Grid Mesh Comb
Electrode
PC Drum Comb Electrode Cleaning Lever
Ozone
Filter
Grid Voltage
PC Drum
Charge Output
5.5 Developing Unit
Construction and
Drive
PC Drum Sleeve/Magnet Roller Doctor Blade
Toner Supply
from Hopper
Developing Clutch Supply/Agitating
/Conveying Screws
5.5.1 Developing and ATDC Sensor Window Bias
Sleeve/Magnet Roller Developing Bias
ATDC Bias
ATDC Window
Mounting Screw
5.5.2 ATDC Sensor
ATDC Sensor for C, M, Y ATDC Sensor for Bk
Optical
ATDC Sensor
Magnetic
ATDC Sensor
Magnetic
Brush
ATDC Sensor
Window Mylar
ATDC Sensor
(Bk)
ATDC Sensor
(C, M, Y)
5.6 Cleaning Unit and Main Erase
Conveying Coil
Cleaning Blade
Main Erase
(LPH Unit Side)
5.7 Layout of Terminals
Developing Bias
PC Drum Charge
Output
Grid Voltage
Developing Bias PC Drum Charge Output
Grid Voltage (Bk, C, M, and Y (Bk, C, M, and Y from
ATDC Bias from right to left) left to right)
(Bk, C, M, and Y
from left to right)
Developing Bias
(Bk, C, M, and Y
from left to right)
PC Drum Charge
Output (Bk, C, M,
and Y from left to
right) Grid Voltage (Bk, C, M,
ATDC Bias
and Y from right to left)
5.8 Development System
Conventional System New System
N S
N
N S
PC Drum
Sleeve Roller
5.9 Operation for New IU
Timing and Operation for the detection of a new IU
Power OFF/ON, or 24V- ON after Front Door Opened & Closed
If all IUs are mounted and if any new IU installed
New IU detected
Transfer Belt Cleaned
Image
Transfer Belt ATDC or "Control for prevention ATVC
Stabilization
Retracted Adjusted of the Belt Cleaning Blade Adjusted
Operated
coming off" Operated
No New IUs detected
Transfer Belt Cleaned
Image
Transfer Belt or "Control for prevention ATVC Stabilization
Retracted of the Belt Cleaning Blade Adjusted Operated
coming off" Operated
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