KPOWERSCIENCE KP3828 Series, Maintenance Manual

Page: 38 / 230

2-21
2-3-3 Transport
When the printer receives the print instruction (PRINT signal) from the
controller and completes paper in, it sends the image data request signal
(VSYNC signal) to the controller and, at the same time, begins to expose
the OPC drum to the LED array light.
The tractor advances the paper loaded to the transfer point when the drum-
exposed surface reaches the toner transfer point. The transport unit goes
up into the upper position just before the paper-leading end reaches the
toner transfer point and stays there until printing is completed.
The suction fan draws the paper from below, and the transport belt carries
the paper from below the fuser unit to the output section.
To prevent sagging of the paper at the perforations, the paper out motor
operates at a higher speed than the OPC drum to drive the transport belts
at a slightly higher speed than the rotation speed of the OPC drum.
Fig.2-23
2-3-4 Paper Output
The paper moves straight through the output roller.
Paper output section
Sensor PMS Scuff roller
Fuser unit
Transport belt
OPC Drum Exposure (LED array)
Transport roller Suction fan Transfer point