12. R emove
t he
m ain
c ircuit
b oard
f rom
t he
c enter
s ection
a ssembly.
13. R eplace
t he
m ain
c ircuit
b oard;
r everse
o rder
o f
s teps
1 -‐13
o f
t his
s ection.
Portable
O xygen
C oncentrator
Figure
2 2.4:
S elf-‐Tapping
S crews
Figure
2 2.5:
M ain
C ircuit
B oard
R emoval
MN220-‐1
A
8 0