2500_Users_Manual - 第256页
Repair and Repl acement Procedures 7-12 ProMa ster 25 00 U ser Ma nual 10. Follo w the same procedure to remo ve the left orbital alig nment bloc k. 11. Support the assembl y with one hand while you remove the two 7/64- …
Repair and Replacement Procedures
ProMaster 2500 User Manual 7-11
23. Rotate the orbital cam to make sure it spins freely and does not rub
against the underside of the main plate. If you feel or hear the cam
rubbing against something, grasp the outer edge of the cam and
gently pull it approximately 3/32 of an inch away from the underside
of the main plate and recheck it again.
24. Install the collar over the cam spindle. The slit in the collar must be
aligned with the slit in the spindle (see Figure 7-10).
25. Turn the orbital cam one final time to check for smooth rotation with
no rubbing.
Replacing the
Output Orbital
Motor
Follow the steps below to access and replace the output orbital motor.
1. Turn off the 2500 and remove the power cord.
2. Remove the PE assembly, as described on page 7-3.
3. Locate the round output orbital motor collar. Loosen the 7/64-inch
hex screw and remove the motor collar.
4. Disconnect the Molex motor cable J-13. The end of this connector is
located under the main plate and will not fit through the main plate
hole. You must remove the four pins in the connector to free the
cable. Note the wire colors and the wire positions in the connector
(see Figure 7-9).
5. Use a Molex pin extractor tool to remove the four pins from the white
plastic connector.
6. After you've removed the four pins, pull the cable through to the top
of the main plate.
7. Remove the 3/32-inch hex screw that holds the grounding strap to
the left support brace.
8. Remove the two 3/32-inch hex screws that hold the optic block to the
underside of the main plate. Slide the optic block off the dowel pin.
9. From above the main plate, remove the two 3/32-inch hex screws
holding the right orbital alignment block to the main plate. Slide the
block out and set it aside.
Figure 7-10
Align the Slit in the Collar with
the Slit in the Spindle
2297-1
INCORRECT ALIGNMENT CORRECT ALIGNMENT
SLIT IN COLLAR
SLIT IN SPINDLE
HEX SCREW
COLLAR
SPINDLE
Repair and Replacement Procedures
7-12 ProMaster 2500 User Manual
10. Follow the same procedure to remove the left orbital alignment block.
11. Support the assembly with one hand while you remove the two 7/64-
inch hex retaining screws (with the white plastic standoff) on the tube
clamp support braces.
12. Carefully slide the back end of the orbital assembly off the orbital
cam spindle. Be careful that the white bushing between these two is
not lost or damaged.
13. When the assembly is off the spindle, slide the entire assembly
toward the back of the 2500 until it is free from the two front support
braces. Let the assembly dangle from the cables.
14. Remove the orbital cam from the motor shaft. Now you are ready to
remove the output orbital motor.
15. From below the main plate, remove the four 1/16-inch hex screws
that holds the output orbital motor to the main plate.
16. Lower the main plate and remove the output orbital motor.
17. Place the new output orbital motor in position on the main plate.
Make sure the power cable is oriented to the right side of the new
output orbital motor.
18. Guide the motor cable through the hole in the main plate.
19. Insert the four motor wires into the white plastic Molex connector. Be
sure to insert the wires in the same order (and orientation) as shown
in Figure 7-9.
20. The output orbital motor shaft has a flat edge on one side. Turn the
shaft until the flat edge faces the front of the 2500.
21. The orbital cam has a small hole on its outer edge. Position the cam
on the motor shaft so this small hole is positioned on the right side
(input side) of the shaft.
CAUTION: When you reinstall the orbital assembly, make sure the
white bushing that fits over the spindle stays in position.
22. Reinstall the assembly (in reverse order from the procedure in steps
11-13 above).
23. Reinstall the left and right alignment blocks and the optic block.
24. Rotate the orbital cam to make sure it spins freely and does not rub
against the underside of the main plate. If you feel or hear the cam
rubbing against something, grasp the outer edge of the cam and
gently pull it approximately 3/32 of an inch away from the underside
of the main plate and recheck it again.
25. Install the collar over the cam spindle. The slit in the collar must be
aligned with the slit in the spindle (see Figure 7-10).
26. Turn the orbital cam one final time to check for smooth rotation with
no rubbing.
Repair and Replacement Procedures
ProMaster 2500 User Manual 7-13
Replacing the Print
Drive Motor
Follow the steps below to replace the print drive motor.
1. Turn off the 2500 and remove the power cord.
2. Unplug the motor cable from the motor power supply.
3. Push down on the belt tension wheel and remove the drive belt.
4. Loosen the 5/64-labeler knob set screw (two screws are used on the
thermal printer) and pull the knob off the motor shaft.
5. Remove the four 3/32-inch hex screws that hold the motor to the
labeler plate and remove the motor. See Figure 7-11.
6. Install the new motor and reinstall all the components you removed.
Replacing the Dot
Matrix Print Head
Follow the steps below to replace the print head. If you need to adjust the
gap between the platen and the print head, refer to the “Adjusting the
Print Head Gap” procedure on page 5-24.
The impact 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 two hex screws that hold
the print head to the print head mounting blocks.
3. Remove the two cables (J-22 and J-23) from the cable connectors on
the print head PCB.
Note: Identify and mark the polarity of the cables before you remove them.
4. Install the new print head assembly.
Figure 7-11
Removing the Print Drive Motor
(Dot Matrix Printer shown;
Thermal Printer similar)
2310-1
PRINT DRIVE
MOTOR
SCREW (1 of 4)