2500_Users_Manual - 第259页
Repair and Repla cement Procedures ProM aster 25 00 User Manua l 7-15 Replacing the Beam Head Rotation Motor Follow the s teps below to replace the beam head rotation moto r. 1. Turn off the 2500, re move the power cord,…
Repair and Replacement Procedures
7-14 ProMaster 2500 User Manual
Replacing the
Thermal Print Head
The thermal print head is mounted on a small printed circuit board
(PCB). Do not attempt to remove the print head from the PCB. The new
print head is mounted on a new board, which should be installed as one
assembly.
1. Turn off the 2500 and remove the power cord.
2. Use a 3/32-inch hex wrench to remove the hex screw that holds the
print head to the print head mounting block.
Note: In the older style thermal printer, there are two print head mounting
screws and limited clearance for a full-size hex wrench to reach the inside
print head mounting screw. Use an L-shaped 3/32-inch hex wrench that
has been modified by grinding down the extension end so it is between
1/4-inch and 5/16-inch long. Use a 7/64-inch hex wrench to remove the
hex screw that holds the ribbon cable clamp.
3. Pull out the print head assembly and unplug the ribbon cable (J-27)
from the print head PCB cable connector.
4. Install the new print head assembly.
Figure 7-12
Removing the Print Head
2390-1
PRINT HEAD
SCREW (1 of 2)
MOUNTING
BLOCK (1 of 2)
Repair and Replacement Procedures
ProMaster 2500 User Manual 7-15
Replacing the Beam
Head Rotation Motor
Follow the steps below to replace the beam head rotation motor.
1. Turn off the 2500, remove the power cord, and disconnect the motor
cable.
2. Remove the two 3/32-inch set screws in the shaft pulley of the
rotation motor.
3. Remove the single 3/32-inch hex mounting screw in the beam head
pulley.
4. Loosen the four motor mounting screws using a 1/16-inch hex
wrench.
5. Pull up the beam head pulley and remove the beam rotation belt.
6. Remove the motor drive pulley.
7. Use a 1/16-inch hex wrench to remove the four motor mounting
screws and remove the beam head rotation motor.
8. Install the new motor, but do not tighten the four hex mounting
screws.
9. Install the motor shaft pulley, beam head pulley, and beam rotation
belt.
10. Adjust the belt tension by moving the motor closer or farther from
the beam head.
11. When you have sufficient belt tension, tighten the four hex mounting
screws.
Replacing the Beam
Traverse Motor
Follow the steps below to replace the beam traverse motor.
1. Turn off the 2500 and remove the power cord.
2. Lift the main plate of the 2500 and disconnect the ribbon cable
connector from J-7 on the controller board.
3. Disconnect the traverse motor power cable from J-11.
4. Look through the two holes in the top of the beam traverse motor’s
mounting block (see Figure 7-16) while you manually rotate the lead
screw until the heads of the flex coupler set screws are visible
through the holes.
5. Use a 7/64-inch hex wrench to loosen the set screw on the right side
of the flex coupler.
Note: This set screw connects the flex coupler to the beam traverse motor shaft.
6. Use a 5/32-inch hex wrench to remove the four beam traverse motor
mounting screws and remove the beam traverse motor.
7. Install the new motor and re-assemble all of the disconnected
components.
Repair and Replacement Procedures
7-16 ProMaster 2500 User Manual
Mechanical Assembly Removal
Replacing the Input
Orbital Tube Clamp
If the tube clamp on the input orbital tube clamp assembly is too loose,
does not close, or produces too much tension, follow the steps below to
replace it.
1. Turn off the 2500 and remove the power cord.
2. Remove the PE assembly, as described on page 7-3.
3. Lift the main plate and locate the round input orbital motor collar on
the cam spindle. Loosen the set screw and remove the motor collar.
4. Remove the two 3/32-inch hex screws that hold the rear orbital
alignment block to the underside of the main plate. Slide the rear
orbital retaining block off the dowel pin and let the block dangle from
the cables.
5. From above the main plate, remove the two 3/32-inch hex screws
that hold the front orbital alignment block to the main plate. Remove
the front orbital retaining block from the underside of the main plate.
6. Support the left side of the orbital assembly while you remove the
7/64-inch hex retaining screw on the right side of the orbital
assembly.
7. Remove the 3/32-inch hex screw that holds the grounding strap to
the underside of the main plate.
8. Use a needle-nose pliers to remove the track springs.
9. Remove the four 3/32-inch hex screws on the underside of the input
orbital plate.
10. Cut the tie wraps and disconnect the two optic cable connectors and
the single microswitch cable connector.
Figure 7-13
Remove the Track Springs
2308-1
INPUT ORBITAL
ASSEMBLY
SPRING (1 of 2)
CENTER POST