Panasonic KX-P7105 / KX-P7110 (serv.man2) Service Manual ▷ View online
1.5. Electrical Components and Sensor Boards
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KX-P7105 / KX-P7110
1.6. Switches and Solenoids
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KX-P7105 / KX-P7110
1.7. Print Process
1.7.1. Charge
The charge corona applies a high, uniform positive charge to the surface of the organic photoconductor ( OPC ) drum. The charge
level is approximately 900 VDC and remains because the OPC drum has a high electrical resistance when concealed in darkness.
level is approximately 900 VDC and remains because the OPC drum has a high electrical resistance when concealed in darkness.
1.7.2. Exposure
The laser beam passes through the collimator lens, is reflected by the polygon mirror, and is focused onto the drum after passing
through an image-forming (
through an image-forming (
) lens and a reflection mirror. Wherever the laser beam strikes the drum, the positive charge
dissipates. A latent electrical image of two different voltages potentials, which corresponds to the original page, is formed on the
OPC drum.
OPC drum.
1.7.3. Development / Cleaning
Development:
Non-magnetic toner is supplied to the conductive roller by the toner supply roller. The toner on the conductive roller is positively
charged by friction with the toner supply roller, and the doctor blade ensures a thin layer on the surface of the conductive roller.
Wherever the conductive roller touches the drum, the positively charged toner is attracted to the latent image on the drum, and the
latent image is converted to a visible toner image. A bias voltage of approx. 350 VDC is applied to the conductive roller to achieve
maximum print quality.
charged by friction with the toner supply roller, and the doctor blade ensures a thin layer on the surface of the conductive roller.
Wherever the conductive roller touches the drum, the positively charged toner is attracted to the latent image on the drum, and the
latent image is converted to a visible toner image. A bias voltage of approx. 350 VDC is applied to the conductive roller to achieve
maximum print quality.
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KX-P7105 / KX-P7110
Cleaning:
After transfer, residual toner remains on the drum surface, and for next printing, the residual toner reaches to the development area
via charge and exposure. The charge level of the OPC corresponds to the white background is +900VDC, and the bias voltage of
the conductive roller is approx. +350VDC. Therefor the positively charged residual toner on the OPC drum is attracted and collected
to the conductive roller. The charge level of OPC after exposure is +100VDC. So, the printing area of the OPC is cleaned.
via charge and exposure. The charge level of the OPC corresponds to the white background is +900VDC, and the bias voltage of
the conductive roller is approx. +350VDC. Therefor the positively charged residual toner on the OPC drum is attracted and collected
to the conductive roller. The charge level of OPC after exposure is +100VDC. So, the printing area of the OPC is cleaned.
1.7.4. Transfer
As the paper is fed between the drum and the transfer roller, a high negative charge is applied to the back of the paper. The positive
toner particles are then attracted from the drum surface to the paper. After transfer, the paper is separated from the drum surface
by the curvature of the drum.
toner particles are then attracted from the drum surface to the paper. After transfer, the paper is separated from the drum surface
by the curvature of the drum.
1.7.5. Fusing
The paper passes through the fuser rollers and is subjected to heat and pressure. The fusing temperature is approximately 190°C
( 382.5°F ), and the pressure is approximately 0.36kg/cm ( 3.53N/cm ). This bonds, or fuses, the toner into the paper.
( 382.5°F ), and the pressure is approximately 0.36kg/cm ( 3.53N/cm ). This bonds, or fuses, the toner into the paper.
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KX-P7105 / KX-P7110
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