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5
Replacing major subassemblies
This section contains brief instructions and points to be aware of as you replace major
subassemblies and reassemble the flow generator.
Caution
When the main PCB, flow meter or motor is replaced, the flow generator must be
recalibrated and tested. Follow the procedures in Section 7 Calibration procedures to
!
calibrate the unit, then repeat tests 6-17 in Section 3 General inspection and servicing.
Printed circuit boards can be damaged by static electricity. Please read the instructions in
Section 4 Operator safety and static precautions before attempting to replace any
PCBs.
Thread cutting screws are used throughout the flow generator. When replacing a thread
cutting screw, turn the screw anti-clockwise until it fits into the previously cut thread,
otherwise the original thread may be stripped out.
Outer components of the VPAP range
Top case
Interface panel
Power outlet
Data card
module
Rear view
5 Replacing major subassemblies
Handle
Air outlet
Bottom case
Filter
DC input
AC input
19
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