Service and repair
Puritan Bennett™ 700 Series Ventilator System Service Manual
10070389 Rev. A
8-19
8.5.6 Keyboard assembly
Caution
When disassembling the UI, account for all fasteners removed, as fasteners falling
between the keyboard and the UI display PCB may cause equipment failure.
Remove the keyboard assembly as follows. Install by reversing removal procedure.
1.
Remove LCD panel (Section 8.5.5).
2.
Disconnect UI/ventilator head cable from UI display PCB.
3.
Using 5.5-mm or
7
/
32
-in. nutdriver, remove 16 M3 nuts with captive external lockwashers
that attach keyboard assembly/UI display PCB to lid (Figure 8-12). Lift out assembly.
4.
Separate keyboard assembly from UI display PCB:
a.
Using 7-mm nutdriver, remove 12 M4 nuts and external lockwashers.
b.
Disconnect cables (keyboard and rotary encoder) from UI display PCB. Separate PCB
from keyboard.
5.
If you are installing a new keyboard assembly, unscrew and transfer 16 nylon spacers
from original keyboard assembly to new keyboard assembly (Figure 8-14).
NOTE:
When installing the keyboard assembly to the lid, make sure the keyboard is oriented
with the bar graph to your right. Do not overtighten the nuts. Inspect the UI panel
windows for smudges or debris. Clean as required using UI cleaning spray
(P/N G-061576-00).
Figure 8-14. Spacers on keyboard assembly
7-00188
M2.5 spacer
(4 PL)
M4 spacer
(12 PL)
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