Xerox WorkCentre XK50cx Service Manual page 34

The above control signals are sent to head driver
and the head driver converts these signals to the
level (+12V) to drive head nozzles.
PRINTER MOTOR CONTROLLER
• DIR : U15 - 34, Rotation Direction
• PWM : U15 - 32, Pulse Width Modulation Output,
Active High
• LFPHA : U15 - 140, LF Motor Phase A
• LFPHB : U15 - 143, LF Motor Phase B
• LFIA0, 1 : U15 - 139, 141, LF Motor Phase A
Current Mode
• LFIB0, 1 : U15 - 142, 144, LF Motor Phase B
Current Mode
Fig.4-1-7 Timing Diagram for Each Nozzle
MFP Controller (KS32C6400:U15) supports both DC
motor and stepper motors. It controls CR (Carriage
Return) motor used to print documents and LF (Line
Feed) motor used to feed and eject paper.
CR motor controller can support 75, 150, 200, 300,
600, or 1200dpi according to resolution, while LF
motor controller supports uni-polar and bi-polar
according to the kind of motors. Though full step,
half step and software control are possible for both,
CR motor is controlled half step and LF motor is
controlled half step and quarter step here.
Circuit
4-7