Platen Roller - Intermec EasyCoder 501 XP Service Manual

Chapter 8 Print Unit

8.2 Platen Roller

42
Description
The platen roller is coated with silicon rubber. It is imperative that
the roller is clean and free from uneven wear or dents. The platen
roller is identical to the liner drive roller, but not to the ribbon
assist roller. It is normal that the platen roller needs to be replaced
after a period of time depending on print volume and other circum-
stances.
Replacement
• Switch off the power to the printer and disconnect the power
cord.
• Open the front and right hand doors.
• Remove the cover over the electronics compartment, which is
held by eight #T10 Torx screws.
• Remove the tension of the belt to the ribbon rewind unit by
loosening the two #T20 screws that holds the ribbon rewind
unit.
• Dismantle the stepper motor from the bracket by removing the
two #T20 Torx screws.
• Free the belt from the pulley of the ribbon rewind unit and
manipulate the stepper motor so it comes free from both belts.
Remove the stepper motor.
• Remove the belt from the pulley of the platen roller.
• Insert a 2 mm hexagon key through the semicircular slot in the
front plate and loosen the grub screw that holds the pulley on
the shaft of the platen roller.
• Using a #T20 screwdriver, remove the bracket that holds the
outer end of the platen roller and pull out the entire package.
• Reassemble in reverse order using a fresh set of roller and bear-
ings. When fi tting back the pulley on the platen roller shaft,
check that the distance between the pulley and the inner gable
of the print unit becomes 5 mm (0.2 inches.)
• When putting back the stepper motor, fi t the short belt fi rst,
while letting the long belt hang loosely on the idler in a loop,
through which you can insert the pulley of the stepper motor.
Do not put the long belt around the pulley of the ribbon rewind
unit until you have fi tted the stepper motor to the bracket and
checked that both belts are engaged by the stepper motor's pul-
leys.
• Adjust the tension of the belts as described in Chapter 8.5 and
put back the cover.
Refer to illustration on next page!
Intermec EasyCoder 501 XP – Service Manual Ed. 4