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Troubleshooting
Advanced Mode
1/13/2016 ZD420 User’s Guide 212485-001 Rev. A
Manual Print Darkness Adjustment
Pressing PAUSE while the DATA indicator() is illuminated yellow will start Manual Print
Darkness Adjustment. The printer will print a test pattern showing the current darkness number
and several barcode patterns and then pause momentarily. The printer will then repeat the
pattern with the next darkness level. When you see the printer print a pattern with solid even
black lines, press FEED to set the darkness value and return to the READY state.
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