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Maintenance
RTC Battery
1/13/2016 ZD420 User’s Guide 212485-001 Rev. A
Other Printer Maintenance
There are no user level maintenance procedures beyond those detailed in this section. See the
Troubleshooting on page 83 for more information on diagnosing printer and print problems.
RTC Battery
The RTC (Real-Time Clock) battery is not operator replaceable. See a Zebra authorized service
technician to replace the battery. The battery has been rated for up to ten (10) years of operation.
Fuses
There are no replaceable fuses in the ZD420 printer or power supply.
Caution • The printer has a three volt lithium battery. You can discern a low or flat battery
if the printer provides a consistently delayed date stamp. Battery replacement must be
performed by a qualified service technician. Only use a Zebra approved replacement
battery.
Important • Recycle batteries according to local your guidelines and regulations. Wrap the
battery when disposing (or storing) to avoid a short circuit.
DO NOT short circuit the battery. Short circuiting the battery may result in heat generation,
fire or bursting.
DO NOT heat, disassemble or dispose of battery in fire.
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