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P1005089 Rev. C pg. 3 of 13
Introduction
NOTE: Zebra Technologies Corporation is not liable for personal injury or damage to any equipment
caused by the improper mechanical installation of this equipment or improper connection to any
power source. Check with the vehicle manufacturer or dealer for installation assistance in order
to prevent the voiding of the vehicle warranty or maintenance contract.
The MM4 Mobile Mount system is designed to integrate a Zebra™ QLn420, QL 420 or a
P4T series mobile printer and optionally a Zebra DC/DC power supply into the electrical and
mechanical systems of a vehicle. Once installed it will provide intelligent charging capabilities
for the printer’s battery and protection from accidental damage to the printer.
The DC/DC modules are supplied separately from the MM4 installation Kit (p/n AK18926-3
for QL 420 & P4T and P1050667-035 for QLn420). They should be installed in accordance with
their installation guides and under the supervision of properly trained and qualified personnel.
The installation and safety warnings in this manual pertain only to the mechanical
installation of the MM4 mobile mount. Follow them closely to ensure safe, reliable
performance of the QLn420, QL 420 or P4T Printer in a mobile environment
It is important that the vehicle’s electrical system be functioning properly. The vehicle’s
charging circuit must work properly and vehicle-generated electrical “noise” must be
minimized and within specifications.
The vehicle charging circuit must neither undercharge nor over-charge the vehicle battery.
Defective ignition wiring, damaged insulation, or faulty vehicle electrical components can
cause electrical noise and excess electrical noise can be severe enough to defeat the electrical
filtering that is built into the printer. When this happens, computers and printers can behave
unpredictably.
NOTE: All of these systems must be connected in strict accordance with the instructions in this
document. Failure to install this equipment per these instructions will void the warranty.
MM4 Mobile Mount Safety and Installation Guide