Printing Process Operation - Panasonic UF-6300 Service Manual

SNS3 PC Board (1009)
No Paper Actuator (525)
Paper Feed Solenoid (531)
CST2 PC Board (1009)
No Paper Actuator (922)
Paper Feed Solenoid (908)
6.1.4.

Printing Process Operation

Bias Transfer Roller
Charge
In the dark, the Bias Charge Roller (BCR) applies a high, uniform negative charge to the surface of the
OPC Drum. The surface potential is approximately -650 VDC and remains because the drum has a high
electric resistance in the dark.
Exposure
A portion of the laser beam is deflected to the timing sensor [Beam Detection (BD) Sensor], which
controls the start timing of scanning on the OPC Drum. The CPU also uses the timing sensor to detect
abnormal signals. The light beam from the laser diode is modulated by the digital signal (nVIDEO) and
converted to parallel light waves by the collimator lens. The beam is then directed to the rotating tetragon
mirror, where it is reflected to the f-θ lens and then focused onto the OPC Drum surface. The laser beam
moves across the surface of the OPC Drum in the scanning direction. Where the laser beam is applied,
the negative charge on the drum dissipates, and where the laser is not applied, the negative charge
remains. This action forms a latent, electrostatic image on the OPC Drum, corresponding to the original
image.
Paper Feed Roller (518)
Clutch Gear Assembly
Handle
Laser Beam
Toner
Hopper
L and R Paper Separation Clips (809, 811)
Feed Roller (526)
SNS1 PC Board (1008)
Timing Actuator (609)
Pinch Roller (607)
Feed Roller (904)
Pinch Roller (919)
Toner Waste Box
Waste Toner
Cleaning Blade
OPC Drum
Development Roller
Developing Blade
Agitator Sweeper
Mixing Blade
178
Paper Feed Roller (911)
Clutch Gear Assembly
L and R Paper Separation Clips (809, 811)