Bair Paws
®
Model 850 Warming Unit Service Manual
14
Using either a replacement temperature controller assembly or a replacement hose, thread the
8.
controller wire through the hose hole. Hold the hose vertical and let the wire connector drop
through to the hose end that attaches to the warming unit.
Reattach the hose to the warming unit by following steps 2 – 7 in reverse order.
9.
Recalibrate the temperature and test the over-temperature circuit before returning the unit to
10.
service.
Replacing the Power Cord
Tools/Equipment Needed
Medium Phillips screwdriver
•
1/32” flat screwdriver
•
ESD strap
•
Model 850 replacement power cord
•
Method
Disconnect the warming unit from the power source and put on an ESD strap before starting
1.
the procedure.
Remove the two screws that attach the case bottom (dark purple) to the warming unit and slide
2.
the case bottom down the hose.
Remove the four screws on the back side of the unit enclosure.
3.
Remove the one remaining screw on the front side of the enclosure that holds the hose to the
4.
warming unit. Lift off the front enclosure.
Disconnect the hose and the temperature controller wire connector (see Figure 10).
5.
Disconnect the six-pin power connector by depressing and pulling on the snap tab.
6.
Remove the five screws on the printed circuit board (PCB), and set the PCB aside.
7.
Disconnect the black wire and the white wire by inserting a 1/32” screwdriver into the
8.
corresponding slots in the power connector (see Figure 12).
Remove 4 screws on the motor assembly and lift away from the warming unit enclosure. Pull out
9.
the old power cord.
Figure 12. Power connector.
