Print Test Label; Loop Back Test Plug - Datamax Prodigy Plus Operator's Manual

2.3.2 Print Test Label

The Print Test Label consists of a test pattern of printed bars and
can be used to isolate problems with the print quality, along with
determining bad Printheads or rollers.

2.3.3 Loop back Test Plug

A Loop Back Test Plug can be installed for serial communications
testing. Below are examples of the Loop Back Test Plugs. If the
Test Plug is installed the following two lines will be added to the
Configuration Label.
SERIAL LOOP BACK CHECK GOOD
CTS & DTR LOOP BACK CHECK IS GOOD
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Printer Setup
Figure 2-5 Print Test Label
Figure 2-6 Loop Back Test Plugs
Prodigy Plus