Service and repair
Puritan Bennett™ 700 Series Ventilator System Service Manual
10070389 Rev. A
8-49
Figure 8-41. Pressure solenoid PCB tube connectors
8.10.3.5 Removing/installing controller PCB
Remove the controller PCB as follows. Install by reversing removal procedure.
1.
Remove the pressure solenoid PCB (Section 8.10.3.1).
2.
Disconnect harnesses.
3.
Unscrew seven standoffs, and lift off PCB.
4.
If you are installing a new controller PCB, transfer software EPROMs (erasable
programmable read-only memory) (U69, U70, U79, and U80) from existing PCB to new
PCB (Section 8.10.3.6). If NVRAM (nonvolatile RAM) remains functional, transfer NVRAM
(U6) from existing controller PCB to new PCB. If NVRAM has failed, install new NVRAM
into controller PCB, then update NVRAM with ventilator data (Section 8.10.3.8).
7-00141
Inspiration
pressure
transducer
Cylinder
pressure
transducer
Exhalation
pressure
transducer
Exhalation flow sensor
differential pressure
transducer
Cutout
Summary of Contents for Puritan Bennett 700 Series
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