2500_Users_Manual - 第266页

Repair and Repl acement Procedures 7-22 ProMa ster 25 00 U ser Ma nual CAUTION: Cov er the power supply assemblies in the base of the 250 0 with a large sheet of paper to catch any mo unting hardwar e (screws, washers, a…

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Repair and Replacement Procedures
ProMaster 2500 User Manual 7-21
Replacing the Labeler
Power Supply
If the labeler power supply fails, follow the steps below to replace it. Be
sure to note the direction of rotation before you remove the fan so that
you can reinstall it correctly.
1. Turn off the 2500 and remove the power cord.
2. Disconnect the three AC input cables on the right side of the power
supply assembly.
3. Disconnect the two output cables on the left side of the power supply
assembly.
4. Use a 3/32-inch hex wrench to remove the two mounting screws
from the back panel of the 2500.
5. Carefully lift out the labeler power supply assembly.
6. Install the new labeler power supply assembly, reconnect the cables,
and reinstall the mounting screws.
System Fan Replacement
This procedure describes the steps required to remove and replace the
system fan.
Replacing the
System Fan
If the system fan fails, follow the steps below to replace it.
1. Turn off the 2500 and remove the power cord.
2. Remove the four 7/64-inch hex screws.
3. Carefully lift out the system fan.
4. Install the new system fan and reconnect the power cable.
Controller Board Replacement
This procedure describes the steps required to remove and replace the
controller board.
Replacing the
Controller Board
If the controller board fails, follow the steps below to replace it. Make sure
you observe all static safety precautions.
1. Turn off the 2500 and remove the power cord.
2. Note the positions and polarities of all of the cables connected to the
controller board before you disconnect any of the cable connectors.
3. Disconnect all of the cable connectors.
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.
Repair and Replacement Procedures
ProMaster 2500 User Manual 7-23
6. Reinstall the traverse motor and attach the new flex coupler to the
lead screw. Tighten with a torque wrench and a left-side screw using
24 inch-pounds of torque.
Note: After you have reinstalled the flex coupler, make sure it does not drag on
the enclosed (right) side of the bracket. Leave a 1/8-inch clearance
(approximately).
Replacing the Right
Lead Screw Bearing
Assembly
If the right lead screw bearing assembly fails, follow the steps below to
replace it.
1. Turn off the 2500 and remove the power cord.
Note: This procedure requires two people to perform the steps safely.
2. Slide the beam over the programming station.
3. Remove the beam traverse motor as described on page 7-15.
4. Use a 1/8-inch hex wrench to remove the four screws in the bearing
cover plate on the right end plate.
5. Use a 9/64-inch hex wrench to loosen the four hex screws holding the
front and rear carriage shafts to the right end plate.
Note: Have an assistant hold the lead screw and shafts during the next steps.
6. Loosen the two main plate corner screws and lift the main plate.
7. Use a hex wrench to remove the two screws holding the right end
plate to the main plate.
8. Lower the main plate and slide the end plate off the shafts and lead
screw.
Figure 7-16
Right Lead Screw Bearing
Assembly
2389-1
BEAM TRAVERSE
MOUNTING BLOCK
RIGHT END PLATE
BEARING COVER PLATE
BEAM TRAVERSE
MOTOR
REAR CARRIAGE SHAFT
FRONT COVER SHAFT