Page 3-8 110XiIIIPlus Maintenance Manual 13185L-002 Rev. A 1/24/06
Section 3 Troubleshooting
Extended Printer Diagnostics
Additional diagnostic tests are available for printhead assembly adjustments. These
diagnostic tests are accessible only when the data interface cable is disconnected from the
printer and a loop back connector is attached in its place.
The serial rollback connector is a 25-pin “D” Type (DB25P – Male) with the following
pins tied together:
The parallel loopback connector is a standard 36-pin parallel connector mounted to a small
printed circuit board. This connector is available from Zebra
(Zebra part number 44680M).
For each of these diagnostic tests, the printer transmits the test label format out of the data
interface connector to the rollback connector. The rollback connector passes the test label
format to the printer as received data, and the test label is prints.
Pause Key Loopback Test
This test demonstrates the media movement capabilities of the printer and provides a test
label to inspect while making print quality adjustments.
With the rollback connector in place, press and hold PAUSE while turning the printer
On (l).
After the Power-On Self Test, 500 head test labels print.
A serialized number prints on each label for label comparison purposes if required. Refer
to the label example in Figure 3-7. Use PAUSE to stop and restart the printing operation.
Figure 3-7. Pause Key Loopback Test Sample Label
• Pins 2 and 3
• Pins 6 and 20
• Pins 13 and 14
• Pins 16 and 19
Figure 3-6. Parallel Loopback Connector
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