Datasheet

Page 4-22 S400/S600 Maintenance Manual 44895L Rev. 3 3/15/04
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Additional diagnostic tests are available for printhead assembly adjustments. These
diagnostic tests are accessible only when the data cable is disconnected from the printer
and a loopback connector is attached in its place.
The serial loopback connector is a 9-pin “D” Type (DB9P – male) with pins 2 and 3, and
pins 4 and 6
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 Technologies as part #
44680.
For each of these diagnostic tests, the printer transmits the test label format out of the
data connector to the loopback connector. The loopback connector passes the test label
format to the printer as received data and the test label is printed.
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This test demonstrates the media movement capabilities of the printer and provides a test
label to view while making print quality adjustments.
With the loopback connector in place, press and hold PAUSE while turning the power On
(l). After the Power-On Self Test, 500 head test labels print. Each label backfeeds prior to
printing and feeds to the rest position after printing. A serialized number prints on each
label. Press PAUSE to stop and restart the printing operation. The labels should look like
the one in
Figure 4-11 on page 4-18.
Figure 4-18. Test, Formats 7 and 14