Brother PT-1090 Service Manual page 42

(2) Turn the main PCB ASSY upside down.
NOTE: The main PCB ASSY consists of the main PCB, the key PCB and the LCD.
(3) Set the LCD to the positioning part of the upper cover, and secure the LCD with
the locking pawl.
NOTE: Do not pull the LCD flat cable.
NOTE: Wipe any fingerprints or dust off the LCD surface with a soft cloth.
(4) Set the main PCB ASSY to the upper cover, and secure the key PCB with the two hooks.
NOTE: Make sure that the main PCB ASSY is fitted over the two bosses, the rib
and the eleven pins.
(5) Secure the main PCB ASSY to the upper cover with the two screws.
Screws
Locking pawl
Upper cover
Figure 3.1-20 Installing the Main PCB ASSY
Key PCB
Main PCB ASSY
LCD flat cable
Pins
LCD
Pins
Positioning parts
III - 20
Positioning bosses
Hooks
Pins