P1057798-001 rev. B • QLn420 Repair Procedures • 2-16 •
5. Slide the back end of the Lower
Housing from the Main Housing
(as shown).
6. Use a torque driver to remove
the (4) screws on the inside of the
Main Housing (where shown).
7. Remove the (2) screws located
inside the media compartment
(where shown).
8. Disconnect the keyboard cable
and antennae from top of Main
Logic Board (MLB), and the LCD
cable from the bottom of the MLB.
Rotate the Main Housing away
from the Printer Frame.
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