Read Sharp AR-651 (serv.man7) Service Manual online
AR-651/810 COPY PROCESS 3 - 10
3. 3. Comparison of Copy Process to AR-650/800
Process
1. Photoconductive drum
(1) Sensitivity
(2) Surface potential
2. Charging
3. Surface potential controlling
4. Writing
(1) Light source
Semiconductor laser (adjustment
Same as AR-650/800
not required)
(2) Light amount
4.0 nJ/mm
2
3.8nJ/mm
2
5. Image density control
Image quality sensor
Same as AR-650/800
6. Development
(1) Magnetic roller
(1) Magnetic roller
Two magnetic rollers
Same as AR-650/800
(2) Auto-toner
Magnetic bridge-circuit method
Same as AR-650/800
(3) Toner supply
Toner hopper system
Toner cartridge system
(There is a toner recycle system.)
(4) Toner-empty detection
Density detection method/lever joint
Density detection system
use
(5) Toner
T-6570/6570E
T-6510/6510E/6510D
(6) Developer material
D-6570J
D-6510
(7) Developer bias
DC-400V + AC
DC-500V + AC
7. Transfer
(1) Transfer
Transfer belt
Transfer belt
(Electrical resistance is lower than
AR-650/800.)
(2) Power supply roller
Power supply roller
Power supply roller
Separation auxiliary roller
Separation auxiliary roller
8. Separation
Transfer belt charging
Same as AR-650/800
Separation finger applied
Same as AR-650/800
9. Discharging
(1) Discharging position
Discharge by exposure after cleaning Same as AR-650/800
(2) Discharge lamp
Discharge by red LED
Same as AR-650/800
(3) Pre-cleaning discharge
None
Same as AR-650/800
10. Cleaning
(1) System
Blade + Brush
Same as AR-650/800
(2) Recovered toner
Not acceptable
Reuse (by the toner recycle system)
11. Cleaning brush bias
Earth
Varistor 430V
AR-650/800
AR-651/810
OD-6570 (OPC drum)
OD-6510 (OPC drum)
Highly sensitized drum
Same as AR-650/800
–650 V (grid voltage –720V)
–700 V (grid voltage –733V)
Scorotron method (constant current)
Same as AR-650/800
Grid output variable
Same as AR-650/800
None
Surface potential sensor
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