Precision Medical PM4150 EasyPulse Portable Oxygen Concentrator (POC) - Manual (Page 16)

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PC Board Replacement (506729):
Tools and equipment required:
#1 Phillips 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. Follow steps 2 thru 14 of the “Disassembly” section of the “Control Panel Replacement” in this manual.
Reassembly
1. Follow steps 4 thru 16 of the “Reassembly” section of the “Control Panel Replacement” in this manual.
2. Follow steps 2 thru 12 of the “Reassembly” section of the “Sieve Bed Replacement” in this manual.
NOTICE!
The correct Firmware must be installed for the device to operate correctly.
Compressor Motor 505852 has been replaced with new Compressor Motor 507640.
If Motor PN# 505852 is
installed, firmware
should be _PXXX. If Motor PN# 507640
is installed, firmware
should be _AXXX.
To determine the installed firmware revision;
 Remove Inlet Filter from back of device and look thru window. (or remove back cover)
 Locate LCD Display on circuit board in the upper left hand corner.
 With the device Control Knob in the off position, plug an external power source into the DC jack.
 Upon power-up the LCD Display will display “ HELLO ”; followed by the Firmware revision ( _XXXX ); followed by run
Hours.
When ordering a replacement Circuit Board, be sure to indicate the required Firmware version.