Samsung ML 1710 - B/W Laser Printer Service Manual page 39

S U M M A RY OF PRO D U C T
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 existed
method. It saves not only the printing time for initial print but also it saves the printing speed for the reat-
tempting print after for a while.
Toner
• 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 stand-
by status.
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 sta-
tus 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.
Error
Polygon motor error
Hsync error
Service Manual
4-22
Air Layer
Holgen Lamp
Paper
Pressure Roller
Description
When the polygon motor's speed doesn't
become a normal
The polygon motor's speed is normal,
but the Hsync signal is not created.
Toner
• 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.
Heat Pipe
Heating Wire
Paper
Pressure Roller
DCU
95
96
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