Brother PT-1900 Service Manual page 36

(2) Remove the switch ASSY harness which is soldered at 6 places, from the main PCB unit.
Note: However, if only the main frame ASSY is removed, the soldered switch ASSY must
not be removed.
(PT-1900/1910)
Switch ASSY harness
(PT-1850)
Switch ASSY harness
Main PCB unit
Main PCB unit
Fig. 3.1-8 Removing the Main Frame ASSY (1)
III-8
Main frame ASSY
Upper cover
Main frame ASSY
Upper cover