Precision Medical PM4150 EasyPulse Portable Oxygen Concentrator (POC) - Manual (Page 14)

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Control Panel Replacement (505845):
Tools and equipment required:
#1 Phillips screwdriver
Small flat blade screwdriver
Small diagonal wire cutters
Needle nose pliers
3/16” (15mm) ID silicone tubing x 6 inch (15 cm) long (minimum)
ESD mat
Disassembly
1. Follow steps 1 thru 11 of the “Disassembly” section of the “Sieve Bed Replacement” in this manual.
2. Lay the POC on its front cover.
3. Carefully remove the large white 4 pin Battery Connector
from the PC Board.
4. Carefully remove the large white 3 pin Motor Connector
from the PC Board.
5. Carefully remove the small white 9 pin Motor Connector
from the PC Board.
6. Carefully remove the two (2) small 3 pin Fan Connectors
from the PC Board.
7. Fold the Wire Harness down and out of the way.
8. Using diagonal cutters carefully cut the Cable Tie securing the small Tube to the PC Board as shown below and
discard the used Cable Tie.
9. Disconnect the small Tube from the PC Board.
10. Using needle nose pliers carefully disconnect the small blue Tube from the
cannula sensor on the PC Board as shown above.
11. Carefully disconnect the small 2 pin connector from the Conserver Valve
from the PC Board as shown above.
12. Using a #1 Phillips screwdriver, remove the four (4) Screws securing the
PC Board in place.
13. Carefully rotate the PC Board up to expose the ribbon cables as shown.
14. Release the Ribbon Cable connectors by sliding the clip away from the
connector, disconnect both ribbon cables and remove the PC Board from
the POC and place in a static free bag.
15. Using a small flat blade screwdriver, from the top of the control panel, carefully pry off the Control Knob and set
aside.