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98 Z4Mplus/Z6Mplus User Guide 13163L Rev. 3 5/20/2004
Troubleshooting
Printer Diagnostics
FEED Self Test
See Figure 42. The FEED Self Test prints labels at various darkness settings above and below
that of the darkness value currently stored in the printer (shown on the first line of the
configuration label). The relative darkness value printed on the best FEED Self Test label is
added to or subtracted from the darkness value. The resulting numeric value (0 to 30) is the
best darkness value for that specific media and ribbon combination.
For example, if the darkness value on a printer is 10 and the best relative darkness value is
zero, leave the darkness setting as is. If the best relative darkness value is –1, change the
darkness setting on your printer to 9 (10 – 1). If the best relative darkness value is 2, change
the darkness setting to 12 (10 + 2).
Figure 42 • FEED Self Test Label, Relative Darkness Value Zero
To perform the FEED Self Test, complete these steps:
1. Turn the printer Off (O).
2. Press and hold FEED while turning On (l) the printer.
3. Release FEED after the DATA light turns off (approximately five seconds).
4. Find the label that has the best darkness setting for your application.
5. If the relative darkness value on this label is a number other than zero (values range from
–3 to 3), adjust the darkness setting on your printer by adding or subtracting that relative
darkness value from the current darkness setting. See Adjusting Print Darkness
on page 57 for more information.