Toshiba e-STUDIO520 Service Manual page 306

Control signal of fuser motor
• HTRMT signal:
This signal switches the on/off of the fuser motor. When this signal moves to a low level, the motor is
rotated, and when this moves to a high level, the motor is stopped.
• HTRCK signal:
This signal is a reference clock which keeps the fuser motor rotation at a constant speed.
When the cyclic change of the FG pulse period against this reference signal is within ±6.25%, this is
defined as a lock range (= the normal rotation of the motor). When the cyclic change is within this
range, the LED on the driving PC board of this motor is lit.
• HTRML signal:
This signal rotates the fuser motor at a low speed. When this signal moves to a low level, the motor
is rotated at a low speed, and when this moves to a high level, the motor is roated at a high speed.
e-STUDIO520/600/720/850 FUSER UNIT
14 - 16
March 2005 © TOSHIBA TEC