Toshiba e-studio550 Service Manual page 54

3. 3. Comparison of Copy Process to 6570/5570
Process
1. Photoconductive drum
(1) Sensitivity
(2) Surface potential
2. Charging
3. Surface potential controlling
4. Writing
(1) Light source
(2) Light amount
5. Image density control
6. Development
(1) Magnetic roller
(2) Auto-toner
(3) Toner supply
(4) Toner-empty detection
(5) Toner
(6) Developer material
(7) Developer bias
7. Transfer
(1) Transfer
(2) Power supply roller
Separation auxiliary roller
8. Separation
9. Discharging
(1) Discharging position
(2) Discharge lamp
(3) Pre-cleaning discharge
10. Cleaning
(1) System
(2) Recovered toner
11. Cleaning brush bias
e-STUDIO550/650/810 COPY PROCESS
6570/5570
OD-6570 (OPC drum)
Highly sensitized drum
–650 V (grid voltage –720V)
Scolotron method (constant current) Same as 6570/5570
Grid output variable
None
Semiconductor laser (adjustment
not required)
2
4.0 nJ/mm
Image quality sensor
Two magnetic rollers
Magnetic bridge-circuit method
Toner hopper system
Density detection method/lever joint
use
T-6570/6570E
D-6570J
DC-400V + AC
Transfer belt
Power supply roller
Separation auxiliary roller
Transfer belt charging
Separation finger applied
Discharge by exposure after cleaning Same as 6570/5570
Discharge by red LED
None
Blade + Brush
Not acceptable
Earth
3 - 10
e-STUDIO550/650/810
OD-6510 (OPC drum)
Same as 6570/5570
–700 V (grid voltage –733V)
Same as 6570/5570
Surface potential sensor
Same as 6570/5570
2
3.8nJ/mm
Same as 6570/5570
Same as 6570/5570
Same as 6570/5570
Toner cartridge system
(There is a toner recycle system.)
Density detection system
T-6510/6510E/6510D
D-6510
DC-500V + AC
Transfer belt
(Electrical resistance is lower than
6570/5570.)
Power supply roller
Same as 6570/5570
Same as 6570/5570
Same as 6570/5570
Same as 6570/5570
Same as 6570/5570
Reuse (by the toner recycle system)
Varistor 430V
JUNE 2002 © TOSHIBA TEC