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Troubleshooting
Factory Test Modes
1/13/2016 ZD420 User’s Guide 212485-001 Rev. A
Factory Test Modes
The printer includes print modes that are intended for factory test only.
Test mode 1 is initiated by holding PAUSE while turning ON printer power. When activated, the
printer will begin printing various test patterns used to evaluate printer performance.
Test mode 2 is initiated by holding PAUSE + FEED + CANCEL for two seconds while printer
power is ON. When activated, the printer will begin printing various test patterns used to evaluate
printer performance.
You can exit either of these test modes by pressing and holding POWER until the printer power
is switched OFF.
Note • Both of these test modes will consume a considerable amount of media as the tests
are performed.
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