Datamax ?-class series Maintenance Manual page 37

Raise the Printhead Assembly. Locate and note the Printhead Resistance Value on the label on the
Printhead.
Printhead
Assembly
Ensure that media is loaded. Close the Printhead Assembly then plug in and turn 'On' the printer.
Wait for the printer to initialize. After 'Ready' is displayed, press the FEED button (this will enable
the printhead voltage for approximately 30 seconds). While monitoring the DMM, adjust the voltage
using RP1 on the Power Supply CCA according to the resistance range listed in the appropriate table
below.
An over-voltage condition can permanently damage or shorten the life of the
printhead.
WARNING
Adjustments and Maintenance
2-27
Printhead
Resistance Value