Intermec EasyCoder PD4, Service Manual

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Intermec EasyCoder PD4—Service Manual 37
Chapter 7—Print Mechanism
7.3 Platen Module
Description
The platen module is a rubber-coated roller and a shaft. Its purpose is to
drive the media through the print mechanism and serve as a counter-force
to the thermal printhead. The silicon rubber is subject to wear and requires
the platen roller to be replaced, usually with long intervals.
When cleaning the platen roller, only use isopropyl alcohol. Other
chemicals may make the silicon rubber crack, get hard or slippery, or
dissolve the surface. Never use sharp tools to remove stuck labels. Do not
rotate the platen roller manually until the power has been off a minute
or more, or the stepper motor may generate current that can damage
the electronics. You could also disconnect the stepper motor cable from
the main board.
Replacement
To remove the platen, 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 Remove the front panel as described in Chapter 2.3 (this step can be
omitted)
3 Remove the E-ring from the inner end of the platen roller shaft and
remove the motor belt and pulley.
4 Remove the ribbon rewinder belt and pulley.
5 Remove the E-rings and washers from either end of the platen roller
shaft.
6 Remove the bearings.
7 Pull out the platen roller.
8 Install the platen roller, bearings, washers, E-rings, pulleys, and front
panel in reverse order.
Platen roller Outer gable Inner gable
Bearing Washer E-ring
Pulleys E-ring
E-ring Washer Bearing