Specifications

Extended Printer Diagnostics
Additional diagnostic tests are available for printhead assembly adjustments.
These diagnostics tests are only accessible when the data interface cable is
disconnected from the printer and a Loopback Connector is attached in its place.
The Serial Loopback Connector is a 25-pin “D” type (DB25P-Male) style with
the following pins tied together.
• pins 2 and 3
• pins 6 and 20
• pins 13 and 14
• pins 16 and 19
The Parallel Loopback Connector is a standard 36-pin parallel connector
mounted to a small circuit board. This connector is available from Zebra
Technologies as Part # 44680.
For each of these diagnostic tests, the printer will “transmit” the test label
format out of the Data Interface Connector to the Loopback Connector. The
Loopback Connector passes the test label format back to the printer as “receive”
Data and the test label is printed.
PAUSE Key Loopback Test
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 the PAUSE Key while turning the
AC Power Switch ON.
After the Power On Self Test, the printer will print 500 Head Test labels. Each
label will backfeed prior to printing and feed to the rest position after printing.
A serialized number will print on each label for label comparison purposes if
required. See the example in Figure 3.6.
The PAUSE Key can be used to stop and restart the printing operation.
S -Series Maintenance Manual: Volume 1 Printer Diagnostics
38452L Rev. 3 Page 3-9