User manual

Repair and Replacement Procedures
7-22 ProMaster 2500 User Manual
CAUTION: Cover the power supply assemblies in the base of the 2500
with a large sheet of paper to catch any mounting hardware
(screws, washers, and nuts) that might otherwise fall onto
the power supply assemblies as you work. If a piece of
mounting hardware is not accounted for when you install
the new controller board, do not turn on the 2500 until you
have located the missing piece of mounting hardware. If a
screw, washer, or nut contacts one of the 2500’s base
assemblies, an electrical short could occur when you turn on
the 2500, resulting in severe damage to the 2500.
4. Use a 1/4-inch hex nut driver to remove the ten nuts holding the
controller board to the front inner wall of the base of the 2500.
5. Lift the controller board straight up.
Note: Each of the mounting screws under the controller board has a nylon spacer
on it. Do not remove these spacers from the mounting studs.
6. Place the controller board on an antistatic mat or bag.
7. Transfer the firmware from U15 and U43 (unless new firmware is
specifically issued), as well as the U16 EEPROM, to the new
controller board.
8. Install the new controller board.
Note: Refer to the controller board wiring diagram in Appendix C.
Beam Assembly Component Replacement
These procedures describe the steps required to remove and replace the
beam assembly components.
Replacing the Flex
Coupler
If the flex coupler is damaged, follow the steps below to replace it.
1. Turn off the 2500 and remove the power cord.
2. Remove the beam traverse motor as described on page 7-15, but do
not remove the cables.
3. Use a 7/64-inch hex wrench to remove the set screw on the left side of
the flex coupler. (The flex coupler is attached to the end of the lead
screw.)
4. Remove the flex coupler.
5. Attach the new flex coupler to the beam traverse motor shaft. Tighten
with a torque wrench and a right-side screw using 24 inch-pounds of
torque.
CAUTION: Over-tightening the set screw can damage the flex coupler.