Diagraph PA/4000, Руководство по обслуживанию, Страница: 175 / 213

Technician’s Guide 2-41
REPLACING THE RIBBON OUT SENSOR
1. Turn the PA/4000’s power switch to the OFF position.
2. Open Electrical Box Assembly.
3. Locate and remove the 4-wire cable connected to J5 on the Applicator Board.
4. Press in the two tabs on the side that hold the sensor mount in place and push the
mount out of the centerplate.
5. Press the Ribbon sensor back into the slot in the centerplate making sure the wires
are at the top of the sensor.
6. Re-connect the 4-wire cable to J5 on the Applicator Board.
7. Close the Electrical Box Assembly.
2.3.5 OTHER REPLACEABLE COMPONENTS
REPLACING THE PRINTHEAD (2801-022)
See Engineering Drawing #6105-101 to further illustrate this procedure .
1. Turn the PA/4000’s power switch to the OFF position. Shut air OFF.
2. Move the unit away from the production line and remove the power cord.
3. Remove existing label stock and ribbon completely from the PA4000.
4. Locate the printhead, printhead cable, media sensor, and the notch in the support
bracket below the printhead.
5. Where the plate is notched, slide the metal jig up into the strain relief portion of
printhead cable.
6. Carefully push the jig towards the label rewind to unplug the connector.
7. Loosen the screw that holds the printhead onto the printhead mount. This is a
captive screw so it will not come completely out.
8. Lift the printhead using the printhead lever and remove the printhead.
9. When installing the new print head, be sure not to touch the glass film area with
your fingers. Also, be sure not to scratch this surface while installing the unit.
10. Be sure to align the new printhead with the alignment pins. Once the new
printhead is in place, lower the lever just enough to hold it in place.
Try to tighten the captive screw. Remove the screw if it does not tighten properly.
Check the alignment of the head and try again. When the screw starts successfully,
tighten two or three turns then lift the head and check to be sure the head is
properly lined up. If everything is aligned properly, then finish tightening the
screw.
11. Close the printhead using the printhead lever.
12. With the metal jig back in the strain relief of the printhead cable press the connector
back into the printhead. Once the printhead cable is fully inserted, remove the jig.
13. Reload the ribbon and label stock.
14. Check printhead by printing several labels. Adjust the Darkness Value using the