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Replacement Procedures and Illustrated Parts List
Shuttle Frame Assembly
Removal
1. Prepare the printer for maintenance (page 194).
2. Remove the shuttle cover assembly (page 209).
3. Disconnect the MPU cable connector (page 279, Figure 47).
ATTENTION
To prevent electrostatic damage to electronic components, wear a
properly grounded static wrist strap when handling circuit boards, the
shuttle frame assembly, and any other electronic component.
4. Disconnect the shuttle motor cable connector (page 275, Figure 45).
5. Disconnect the hammer drive and hammer logic cables connectors from
the terminator board on the shuttle frame assembly.
6. Loosen the side 5/32 inch socket head clamp screws and pull the clamps
back and off the guide shaft. Do not remove the clamps.
7. Loosen the center 5/32 inch socket head screw enough to release the
shuttle frame assembly from the base casting.
8. Unlock and slide the tractors outward as far as they will go on the tractor
support shaft.
9. Grasping the support legs cast on both sides of the shuttle motor, lift the
shuttle frame assembly out of the base casting. Lift it slowly and
carefully: the shuttle frame assembly is heavy.
Installation
1. Install the hammer bank / ribbon mask cover assembly (page 206), if it
was removed.
ATTENTION
To prevent electrostatic damage to electronic components, wear a
properly grounded static wrist strap when handling circuit boards, the
shuttle frame assembly, and any other electronic component.
Do not remove the grease from the shaft of the replacement shuttle
frame assembly. The shuttle shaft is aluminum, and the clamped ends
of the shaft must be greased to prevent galling.
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