Service and repair
Puritan Bennett™ 700 Series Ventilator System Service Manual
10070389 Rev. A
8-47
8.10.3.2 Removing/installing backup alarm PCB
Remove the backup alarm PCB as follows. Install by reversing removal procedure. Refer to
Installation Instructions contained in p/n 10002485 kit for more information and photos of
installation.
1.
Carefully disconnect positive lead of backup alarm. Lead is marked BKALM+. Take care
NOT to pull crimp by the wire; only grasp crimp by crimp body.
2.
Remove and retain M3 nut and split washer from MT11 mounting hole.
3.
Install metal washer and standoff onto MT11 mounting hole on PSOL PCB.
4.
Remove new backup alarm PCB from anti-static bag while taking appropriate ESD
measures.
5.
Securely attach the four nylon standoffs to the backup alarm PCB into PCB mounting
holes MT5, MT6, MT10, and MT12 using four M3 nylon nuts provided.
6.
Install backup alarm PCB onto PSOL PCB ensuring that all standoffs engage with holes
MT5, MT6, MT10, and MT12.
7.
Re-install M3 nut and split washer previously removed from backup alarm PCB MT11
mounting hole.
8.
Plug existing lead removed from backup alarm onto W1 piggyback connector. Secure
existing lead to new lead with tie-wrap.
9.
Plug W1 from backup alarm PCB into positive terminal of backup alarm. Secure W1 with
tie-wrap.
10. Cut tie-wrap ends used in installation of backup alarm PCB.
8.10.3.3 Determine PSOL PCB revision
1.
Determine revision of PSOL PCB from label on front center of PCB (refer to kit
installation instructions p/n 10002485 figure 7).
a.
If PSOL revision is Rev. A to J, then you have a Rev. A PSOL PCB.
b.
If revision says Rev K to N you have a Rev. B PSOL PCB You may also read the revision
from the center front edge of the PSOL PCB p/n G-060002-00 (refer to kit
installation instructions p/n 10002485 figure 8). The revision of the PSOL PCB is
important for subsequent instructions.
2.
One end of W2 is polarized and clearly marked with a label; this end of W2 is connected
to the PSOL. To ease installation of W2, form W2 by bending it as if you were folding it
in half (refer to figure 9 in kit installation instructions, p/n 1002485).
Caution
It is possible to connect W2 incorrectly, as there is one unused pin to allow
compatibility with both revision A and revision B PCBs. Ensure the uppermost 12 pins
are connected. If W2 is connected incorrectly, the +5 V Supply LED on the backup alarm
PCB will not illuminate. If this occurs, disconnect W2 and reconnect correctly.
3.
If PSOL PCB is revision A, then plug W2 from backup alarm PCB into uppermost column
of 12 pins of J2 (refer to figures 10 and 11 in kit installation instructions, p/n 1002485).
4.
If PSOL PCB is revision B, then plug W2 from backup alarm PCB into rightmost column of
13 pins of J8 (refer to figures 12 and 13 in kit installation instructions, p/n 1002485).
5.
Confirm connectors on W1 and W2 are seated correctly and securely.
6.
Power on the ventilator and confirm the +5V supply LED on the backup alarm PCB has
illuminated. This indicates that W2 is seated correctly.
Summary of Contents for Puritan Bennett 700 Series
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