Gp 32 Motor Control - Xerox FaxCentre F110 Service Manual

General Procedures / Information

GP 32 Motor Control

The motor for the ADF scanner is a PM35S-048-ZKS5 from Minebea Electronics unipolar stepper
motor. The motor is driven from the Digicolor using a buffer and a ULN2003A.
During the reset mode (power on) the signal AE1* is configured as input direction. A pull-up on
the buffer input OE* forces the output of the buffer to high-impedance state. The internal pull down
of the ULN2003 prevent the motor to be improperly driven.
After reset the motor buffer must be forced to the value 00h.The signal AE1* is controlled as output
"0" to access motor and "1" for motor stand-by.
The driver is protected against overvoltage by a xxxV zener diode connected to the COM pin.
FaxCentre F110 12/04 6-67