197
Replacement Procedures and Illustrated Parts List
Belt, Platen Open
Removal
1. Prepare the printer for maintenance (page 194).
2. Cabinet Model: Remove the paper guide assembly (page 235).
Pedestal Model: Remove the top cover assembly (page 210).
3. Remove the platen open belt cover by squeezing the top and bottom to
release the plastic tabs from the slots in the side plate (page 283,
Figure 49).
4. Loosen (do not remove) the two motor mount screws (page 285,
Figure 50).
5. Push the motor toward the front of the printer to loosen the platen open
belt.
6. Loosen the setscrew in the platen open motor pulley.
7. Remove the platen open belt by sliding the platen motor pulley off the
motor shaft and the belt off the platen open pulley.
Installation
1. Slide the platen open timing belt over the platen open pulley and the
motor pulley and tighten the 1/16 inch setscrew.
2. Slide the motor pulley onto the platen open motor shaft and tighten the
pulley setscrew.
ATTENTION
Too much tension on the platen open belt can cause the platen gap to
change, which can lead to premature wear of the platen, damaged
hammer tips, and poor print quality.
3. Using a force gauge, apply 10 pounds (44.48 N) of tension to the motor
shaft by pushing in the direction away from the large platen pulley.
4. Reduce tension to 5 pounds (22.24 N) and torque the motor mount
screws to 11 ± 2 inch-pounds (1.24
± 0.23 Nm).
5. Snap the platen open belt cover into the slots in the side plate.
6. Cabinet Model: Install the paper guide assembly (page 235).
Pedestal Model: Install the top cover assembly (page 210).
7. Return the printer to normal operation (page 159).
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