Samsung ML-1755, Руководство по обслуживанию, Страница: 31 / 116

4-20
S U M M A RY OF PRO D U C T
Samsung Electronics
Training Manual
4.6.4.3 What is the Q-PID Method?
The Q-PID is developed by Samsung, and it saves the preheating time in half in comparison with the exist-
ed method. It saves not only the printing time for initial print but also it saves the printing speed for the
reattempting print after for a while.
4.6.5 LSU
The LSU is consisted of the LD (Laser Diode) and the polygon motor control. When the printing signal
occurs, it turns the LD and drives the polygon motor. When the receiving light part detects the beam,
Hsync occurs. When the polygon motor speed becomes a normal, LReady occurs. If two conditions are
satisfied, the status bit of the LSU controller register becomes 1 to be judged that the LSU is ready. If two
conditions are not satisfied, the error shown in below occurs.
Toner Toner
Air Layer
Holgen Lamp
Paper
Pressure Roller
Heat Pipe
Heating Wire
Paper
Pressure Roller
• After heating the air layer, transfer the heat
to the surface
• It takes long time to heat it until it reaches
the proper temperature.
• The high temperature is needed when it is
standby status.
• The heat conductivity of the heat pipe is
100~150 times higher than cooper’s.
• It is possible to raise the temperature in an
instant
• It saves the dissipation of power in the
standby status due to high accumulation of
heat.
Error Description DCU
Polygon motor error When the polygon motor’s speed doesn’t 95
become a normal
Hsync error The polygon motor’s speed is normal, 96
but the Hsync signal is not created.