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Tests and Error Messages
Chapter 7 Tests and Error Messages 67
Figure 7-2 Test Pattern
4. Check the dots in the test pattern to ensure all the heating elements on the printer
head are operational. (Dots printed on the colored grid lines may appear light, but this
is not considered to be a fault.) Check that:
No more than 20 dots are missing over the width of the paper.
No more than 2 adjacent dots are missing.
No dots in the mode annotation are missing.
If any of these checks fail, replace the thermal print head (see -151). The paper speed is
automatically set to 3 cm/min during the test and then reset to its previous value afterwards.
If an error occurs:
An error message is displayed for ten seconds.
Err xxx , time and date are printed on the trace after ten seconds and then
every ten minutes.
(xxx is the number of the error message.)
To stop the error annotation printing, switch the monitor off and then on. If the error is
repeated, refer to Chapter 8, “Troubleshooting Flowcharts.”