Intermec EasyCoder PD4, Service Manual

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36 Intermec EasyCoder PD4—Service Manual
Chapter 7—Print Mechanism
Replacement
Stepper Motor Module
To remove the stepper motor, follow these steps:
1 Disconnect the power cord and remove the left-hand panel as described
in Chapter 3.2. Carefully read the safety instructions in Chapter 3.2!
2 Disconnect the cable from CN7 on the main board and free the cable
from the spiral bindings and the cable clip.
3 Remove the four screws that hold the stepper motor module to the
bottom plate. A screwdriver with a magnetic tip is highly recommended.
4 Disconnect the belt(s) from the motor’s pulley and pull out the motor.
5 Install the motor in reverse order. In case of a printer prepared for a
rewinder, fi t the platen roller belt on the inner pulley (that is, the pulley
closest to the motor housing) and the rewinder belt to the outer pulley.
Belt
To remove the belt, follow these steps:
1 Disconnect the power cord and remove the left-hand panel as described
in Chapter 3.2. Carefully read the safety instructions in Chapter 3.2!
2 Disconnect the cable from CN7 on the main board and free the cable
from the spiral bindings and the cable clip.
3
Remove the four screws that hold the stepper motor module to the
bottom plate.
4 Disconnect the belt(s) from the motor’s pulley and pull out the motor.
5 Install belt and motor in reverse order. Make sure the belt is intended for
the type of printhead (203.2 or 300 dpi) installed in the printer. In case
of a printer prepared for a rewinder, fi t the platen roller belt on the inner
pulley (that is, the pulley closest to the motor housing) and the rewinder
belt to the outer pulley.
Note: If the printer is not prepared for a rewinder, that is, it has only one
belt, you do not have to remove the motor. Just pull the belt of the platen
roller pulley and then off the motor pulley. Fit the new belt in reverse
order. Temporarily disconnecting the tension adjuster spring makes the
process easier.
Platen Roller Pulley
To remove the pulley, follow these steps:
1 Disconnect the power cord and remove the left-hand panel as described
in Chapter 3.2. Carefully read the safety instructions in Chapter 3.2!
2 Pull off the belt from the pulley.
3 Remove the E-ring that holds the pulley on the platen roller shaft.
4 Install the pulley in reverse order. Make sure the pulley is intended for
the type of printhead (203.2 or 300 dpi) installed in the printer.