Ricoh G148, Руководство по обслуживанию

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The magnetic developer brush on the development roller contacts the latent image on the drum surface.
Toner particles are electrostatically attracted to the areas of the drum surface where the laser reduced
the negative charge on the drum.
PTL (Paper Transfer Lamp)
The PTL removes the charge on the drum to improve paper separation and prevent pawl marks on
the paper. The PTL only operates when the machine prints on plain or translucent paper.
5. IMAGE TRANSFER
Paper is fed to the area between the drum surface and the transfer belt at the proper time to align the
paper and the developed image on the drum. The transfer roller applies a high positive charge to the
reverse side of the paper through the transfer belt. This positive charge pulls the toner particles from
the drum to the paper while the paper is electrostatically attracted to the transfer belt.
6. PAPER SEPARATION
Paper separates from the drum as a result of the attraction between the paper and the transfer belt.
The pick-off pawls also help separate the paper from the drum.
7. ID SENSOR
The laser writes a sensor pattern on the drum surface. The ID sensor measures the reflectivity of the
pattern and outputs this data (Vsp) to the CPU. The Vsp output signal is one of the factors used for
toner supply control.
8. CLEANING
The cleaning brush removes toner remaining on the drum after image transfer and the cleaning blade
scrapes off all remaining toner.
9. QUENCHING
The light from the quenching lamp electrically neutralizes the charge on the drum surface. After
cleaning and quenching, the drum surface is ready for the next printing cycle.
6. Details
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