101
Troubleshooting
Printer Diagnostics
1/13/2016 ZD420 User’s Guide 212485-001 Rev. A
Print Quality Report (FEED self test)
Different types of media may require different darkness settings. This section contains a simple
but effective method for determining the ideal darkness for printing barcodes that are within
specifications.
During the Print Quality Report (FEED self test), a series of labels are printed at different
darkness settings at two different print speeds. The relative darkness and the print speed are
printed on each label. The barcodes on these labels may be ANSI-graded to check print quality.
During this test, one set of labels is printed at low speed, and another set is printed at the high
speed. The darkness value starts at three settings lower than the printer’s current darkness value
(relative darkness of –3) and increase until the darkness is three settings higher than the current
darkness value (relative darkness of +3).
The speed at which labels are printed during this print quality test depends on the dot density of
the printhead.
• 300 dpi printers: prints 7 labels at 51mm/sec (2 ips) and 102 mm/sec (4 ips) print speeds.
• 203 dpi printers: prints 7 labels at 51mm/sec (2 ips) and 152 mm/sec (6 ips) print speeds.
To perform a Print Quality Report, complete these steps:
1. Print a configuration report to show the printer’s current settings. Press and hold the FEED
and CANCEL buttons for two (2) seconds to print the report.
2. Turn OFF the printer.
3. Press and hold FEED while setting the printer power to ON. Hold FEED until the Status
indicator is the only indicator lit.
The printer prints a series of labels (Figure 2) at various speeds and darkness settings higher
and lower than the darkness value shown on the configuration label.
Figure 2 • Print Quality Report
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