Instruction manual

5–42
Replacement Procedures and
Illustrated Parts List
Shuttle Frame Assembly
Removal
1. Prepare the printer for maintenance (page 4–2).
2. Remove the shuttle cover assembly (page 5–16).
3. Disconnect the MPU cable connector J03 and shuttle motor cable
connector J02 (page 5–63, Figure 5–12, items 5 and 6).
CAUTION
To prevent electrostatic damage to electronic components, always wear a
properly grounded static wrist strap when you handle the shuttle frame
assembly.
4. Disconnect the hammer drive and hammer logic cables connectors from
the terminator board on the shuttle frame assembly. (See Figure 5–11,
page 5–61.)
5. 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.
6. Loosen the center 5/32 inch socket head screw enough to release the
shuttle frame assembly from the base casting.
7. Unlock and slide the tractors outward as far as they will go on the tractor
support shaft.
8. 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 5–15), if it
was removed.
CAUTION
To prevent electrostatic damage to electronic components, always wear a
properly grounded static wrist strap when you handle the shuttle frame
assembly.
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.