Intermec EasyCoder 301 – Service Manual Ed. 3
28
Chapter 7 Print Unit
7.4
Belts
Description
The stepper motor drives the platen roller via a short tooth belt, and
the ribbon rewind unit
1
and the media take-up unit
1
via a longer belt
1
.
The belts are subject to wear and may need adjustment or replace-
ment.
Replacement
• Open the electrics cover as described in chapter 2.3.
• Remove the CPU board as described in chapter 11.2.
• Remove the ESD plate.
• Remove the stepper motor as described in chapter 7.3.
• Place the replacement belt(s) over the pulley of the stepper motor
noting that the longer belt
1
should run in a loop around the rear
upper pillar that holds the motor and be fitted closest to the
motor.
• Put back the stepper motor, but do not tighten the screws
completely.
• Put back the belt(s) over the pulley(s) as illustrated above.
• Adjust the tension of the belt(s) as described below.
• Fit back the ESD plate
1
, CPU board and the electrics cover in
reverse order.
WARNING!
Before removing the electrics
cover, turn off the printer and
disconnect the power cord. High volt-
age wires and circuits inside.
Stepper Motor
Media Take-Up Pulley
1
Ribbon Rewind Pulley
1
Platen Roller Pulley
Tension Adjuster
1
Max. play
±
1 cm (.4")
1
Long Tooth Belt
1
Short Tooth Belt
Grounding Spring
ESD Plate
1
1
/. Not in the LinerLess model.
