Specifications
Technician’s Guide 2-44
7. Inspect the EPROM to make sure that none of the pins are bent or out of place.
8. Check all cable connections to be sure that no cables were disconnected during the
firmware installation.
9. Replace all electrical and air connections.
10. Turn the PA/4000’s power switch to the ON position.
If the display is blank and the yellow label and ribbon LEDs are flashing, the
EPROM was not installed correctly. Follow steps 1-9 above until the display
reads All O.K. This firmware change will not affect any settings in the Hand-
Held Terminal.
REPLACING THE TAMP CYLINDER ASSEMBLY
1. Turn the PA/4000’s power switch to the OFF position.
2. Remove the two support screws using a 5/32 Allen wrench.
3. Slide the Tamp Cylinder Assembly away from the PA/4000 until it detaches from
the mounting bar.
4. Slide the replacement Tamp Cylinder Assembly onto the mounting bar and
towards the PA/4000 as far as it will go.
5. Slide the replacement Tamp Cylinder 1/4 of an inch away from the PA/4000.
6. Manually extend the replacement Tamp Cylinder to check for obstructions. If any
component restricts the movement of the Tamp Cylinder, slide the Tamp Cylinder
assembly away from the PA/4000 until the problem is corrected.
7. Tighten the two support screws using a 5/32 Allen wrench.
NOTE: Don’t forget to connect the Sensor cable assembly to J5 on the rear panel of the
PA/4000.
REPLACING THE TIMING BELT
1. Turn the PA/4000’s power switch to the OFF position.
2. Open the Electrical Box.
3. Loosen the set screw and remove the collar on the outside of the Rewind Bearing
Plate.
4. Remove the three screws that secure the Rewind Bearing Plate to the PA/4000.
5. Remove the Slip Clutch Spring.
6. Loosen the set screw and remove the Slip Clutch Pulley.
7. Loosen the set screw and remove the Collar on the Ribbon Supply Shaft.
8. Remove the Bearing Mount Bracket by removing the three screws that secure it to
the PA/4000.
9. Remove the spring for the Upper Tensioner.
10. Remove the E-clip that secures the Upper Tensioner assembly to the PA/4000.
11. Remove the Timing Belt from the PA/4000.
12. Reverse the previous steps to replace the Timing Belt.