Printhead Pressure Cams - Sharp SX 1075 Service Maintenance Manual

PRINTHEAD POSITION DRIVE BELT
(con't)
5. Slide the belt off the transfer shaft pulley, and
replace with the new belt.
6. Reinstall the outside cradle plate, and reinstall
the five screws that hold it in place.
7. Place the motor into the machine, being sure to
orientate the cable receptacle to the top-rear of
the machine. Also be sure the belt is over the
pulley.
Figure 3-231. Printhead Position Motor Orientation
8. Reinstall the screws into the motor standoffs
through the slots in the outside cradle plate.
Before tightening into position, be sure to set
the belt tension to a satisfactory level.
center of belt span should displace about 1/16
of an inch when pressed with one finger
perpendicular to the belt travel (Refer to
Machine Adjustments:
Tension for a more detailed explanation).
9. Reinstall the motor cable.
10. Replace all guards removed in the previous
steps.
SX™
Service and Maintenance Manual
PRINTHEAD CRADLE ASSEMBLY
Cable
Receptacle
The
th
Checking Belt
SECTION 3 – COMPONENT REPAIR

PRINTHEAD PRESSURE CAMS

The printhead cams press on the top of the
printhead pressure assembly while imprinting on
the film during operation of the Sharp SX. The
cams also lift the printhead off the film while
feeding and not printing.
TESTING
WARNING
Always remove electrical power from the
SX prior to performing any maintenance
on the machine.
1. Symptoms of cam shaft wear include light print,
higher ribbon usage, and misfeeds with the
ribbon. Visually inspect the cam shafts for
unevenness in the bearing surfaces.
profile of the cam should be smooth and round.
Flats spots in the cam indicate wear, and
require replacement of the plastic cams.
Figure 3-232. Cam Bearing Surfaces
ADJUSTMENT
The printhead pressure cams are adjustment free.
3-94
The
960714-02B © 2007 I2407