Welch Allyn Wall Transformer 76710

Disconnect wall transformer from mains before servicing.

Follow instructions in Section B-1, pg. 2 to remove MH-Front.

Carefully unplug spade connectors of S1 wires from spade contacts of power switch using long nose pliers.

Do not cut the wire tie; it is required to keep wires away from transformer body.

Carefully unplug the two-pin connectors from the emitter and detector with long nose pliers.

Disconnect wall transformer from mains before servicing

Unscrew six Phillips head screws on the back of the 767 using a Phillips #2 screwdriver with a 3" (minimum) shank

Position the 767 on its back and separate the MH-Front from the MH-Back

Ensure housings are not pulled apart abruptly to avoid pulling wires and connectors

Slide the wire tie off of the MH-Back standoff

Disconnect wall transformer from mains before servicing

Follow instructions in Section B-1 to remove MH-Front

Note the position and orientation (polarity) of the blue connectors on the emitter and detector

Use needle nose pliers to carefully remove the two blue connectors from the cradle sensors

Pull at the cradle from the front with your fingers

Disconnect wall transformer from mains before servicing.

Unplug power cord from bottom of wall transformer unit.

Ensure IEC connector accepts new plug; no disassembly required.

Refer to 767 Wall Transformer Instructions PN767036.

Apply calibrated resistance to handle stud using a 5 ohm power resistor (5 watts) in parallel with a 5-10 ohm potentiometer

Adjust potentiometer until current delivered is 750 mA (4.66 ohm nominal load)

Measure output voltage when handle is connected to test load circuit (rheostat full on)

Measure third handle outlet output at slot jacks on right end of main unit