Sharp JX-8200 Service Manual page 9

SHARP SERVICE MANUAL JX8200SM [3] SPECIFICATION
(3) Scanning section
1) Laser beam
Kind (Semiconductor laser)
Wave length (780nm)
2) Optical system
Resolution 600 dpi
Mirror (Polygon mirror)
Scanning motor speed (20079 rpm)
Spot diameter (65 × 85µm)
(4) Developing section
The developing section is divided into the color developing unit and
the black developing unit. The color developing unit includes three-
color developing blocks (Y, M, C).
1) Developing system (Dry, 2-component, reverse magnetic brush
development)
2) Toner density control (Toner density is detected by the magnetic
sensor.)
3) Developer (Developing unit)
Life (Color 30K, black 50K)
4) Toner cartridge
Life (Color 3K, black 5K, 5% density print)
Capacity (Color 120g, black 180g)
5) Developing bias voltage (–250 ∼ –550V)
6) Toner supply motor
Stepping motor
7) Developing unit life control
Automatic detection when in initial installation. The warning mes-
sage is displayed before expiration of the life. When the life is
reached, the message for replacement is displayed.
(5) Transfer section
1) Transfer system
Electrostatic transfer system by the transfer drum
Paper is curled by the curl roller and attracted onto the transfer
drum.
2) Paper hold system
Electrostatic attraction system
3) Transfer voltage
1.0 ∼ 2.8kV
4) Transfer drum
3-layer construction
5) Cleaning system
Blade rotating brush system
6) Separation system
Compulsory separation by the separation pawl
(6) Fusing section
1) Fusing system: Heat roller pressing system
2) Heat roller specifications
Upper heat roller (30 Φ, silicone rubber)
Lower heat roller (30 Φ, silicone rubber)
3) Heater lamp
Halogen lamp 800W
4) Fusing temperature
It automatically changes depending on the ambient temperature.
It differs in the OHP mode and in the normal mode.
5) Temperature control
The surface temperature of the fusing roller is detected by the
thermistor, and the temperature is controlled by the PCU PWB.
6) Overheat protection
Overheat protection is made by the temperature fuse and the
PCU PWB.
7) Cleaning
Cleaning system (Cleaning roller system with silicone oil)
Life (7K print)
8) Fusing motor
Stepping motor
9) Fusing unit life
60K print
10) Life control
Automatic detection when in initial installation. The warning mes-
sage is displayed before expiration of the life. When the life is
reached, the message for replacement is displayed.
(7) Paper exit section
1) Tray system: Face-down
2) Tray capacity: 150 sheets
Max. paper size (Legal 216mm × 356mm) (80g/m
(8) Drive section
1) Main motor
Stepping motor
2) Developing motor
DC brushless motor
3) Paper feed motor
Stepping motor
4) Developing clutch
Magnetic spring clutch (Y/M/C/BK, 4 pcs. in total)
5) Toner supply clutch
Mechanical spring clutch by solenoid drive (Y/M/C, 3 pcs. in total)
6) Developing shutter clutch
Mechanical spring clutch by solenoid drive (One, common for
three colors)
3 – 2
2
)