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Troubleshooting
Printer Diagnostics
3/27/07 ZM400/ZM600 User Guide 79695L-001 Rev. A
4. See Figure 21 and Table 21. Inspect the test labels and determine which one has the best
print quality for your application. If you have a bar code verifier, use it to measure
bars/spaces and calculate the print contrast. If you do not have a bar code verifier, use your
eyes or the system scanner to choose the optimal darkness setting based on the labels
printed in this self test.
Figure 21 • Bar Code Darkness Comparison
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