UBI EasyCoder 601 XP – Service Manual Ed. 1
59
Chapter 8 Print Unit
Replacing the Printhead
The printhead is a consumable part subject to wear from both the
thermal paper or transfer ribbon, and from the rapid heating and
cooling process during printing. Thus, it will require periodical
replacement depending on print volume, type of print media,
amount of energy to the printhead, and several other factors.
To replace a defective or worn printhead, proceed as follows:
• Turn off the power.
• Open the front and right-hand doors.
• Turn the printhead lift knob to “Open” position.
• Remove any paper and/or transfer ribbon from the print unit.
• Carefully pull the printhead bracket away from the magnet in the
lift arm.
In early manufactured printers, the magnet could come loose if
excessive force was used to separate the printhead lift arm from
the printhead bracket. If so, use a drop of Loctite 638 glue to fasten
the magnet again. Let the glue dry with printhead in closed
position. The glue requires 1 minute to dry, but full strength is not
obtained until after 20 hours.
• Disconnect the hooked fingers at the rear of the bracket from the
headlift shaft and pull out the printhead as far as the cables allow.
• Disconnect the two cables from the printhead.
Note the snap-lock on the white connector and pull at the
connectors rather that at the cables!
• Connect the cables to the replacement printhead assy, blue
connector to the left – white connector to the right.
For illustrated step-by-step instructions,
please refer to the Maintenance chapter
in the Installation & Operation manual.
8.7 Printhead,
cont'd.
