Service and repair
Puritan Bennett™ 700 Series Ventilator System Service Manual
10070389 Rev. A
8-75
Install BBU PCB and heatsink bars by reversing removal procedure. Orient heatsink bars and
install conductive strips and FET caps, as shown in Figure 8-62.
Caution
When installing the BBU PCB, remember to install the conductive strips between the
heatsink bars and power assembly, and be sure the FET caps are in place. If the
conductive strips and caps are not installed, the BBU PCB
will
be damaged.
• To prevent damage to the BBU PCB, make sure the FET bars are oriented as shown in
Figure 8-63. BBU PCB attaching hardware
8.14.9.1 Fuses
Caution
To prevent equipment damage, always replace fuses with those of the correct rating
and type (see Chapter 9).
(See Figure 8-61). The BBU PCB has two replaceable fuses, which are accessible without
removing the PCB. Replace the fuses by gaining access to power assembly (Section 8.14.2,
steps 1 through 3), then removing and replacing them as necessary.
8.15 Harnesses and wiring
8.15.1 Main ventilator head harness
Install the main ventilator head harness as follows.
1.
Open and prop lid (Section 8.5.1).
2.
Route harness as shown in Figure 8-64. The harness goes between the ventilator wall
and the cable retainers. The harness connections are shown in Figure 8-65.
BBU PCB
7-00220
M3 x 6 screw
(6 PL)
M3 split-ring
washer (6 PL)
Standoff
(6 PL)
M3 nut (6 PL)
Summary of Contents for Puritan Bennett 700 Series
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