Mallinckrodt NELLCOR NPB-4000 Service Manual page 59

b) Use screwdriver to remove six fastening screws around periphery of main
PCB. Retain fastening screws for reassembly.
c) Lift main PCB slightly and unscrew tubing connector near NIBP front panel
fitting.
d) Main PCB may now be removed. This allows access to SpO
connector, NIBP fitting and backlight inverter.
Backlight
inverter
Step B4
To remove switch panel:
a) Switch panel is attached with an adhesive to front panel.
b) Carefully lift up one corner of switch panel, and peel switch panel away
from front panel. When switch panel is free, feed connector through slot in
front panel.
Step B5
To remove LCD:
a) Remove six fastening screws around periphery of display back plate.
Retain fastening screws for reassembly.
b) Carefully remove grounding straps, noting their location and orientation.
Display back plate may now be removed.
c) Disconnect backlight connector from backlight inverter. LCD may now be
lifted out of front bezel assembly.
Procedure
Illustration
Display back
plate
Procedure
Procedure
Section 6: Disassembly Guide
front panel
2
6-9