Welch Allyn Wall Transformer 76716

Connect the main unit as a power supply

Provide nominal voltage (7.0 V RMS) to the third handle assembly

Verify handle output matches the main unit output

Rheostat and Coil Cord Inspection

Perform functional check of handle rheostat for smooth operation

Articulate coil cord and check for intermittent connections

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.

Refer to clock instructions in manual PN767036, pg. 5 & 6 for replacing clock battery and changing time.

Remove clock assembly from 767 and turn it over.

Remove three Phillips head screws using a #1 Phillips screwdriver.

Remove clock module from face-plate.

Did the set buttons come off during disassembly?

Replace the battery located on the underside of the clock module.

Disconnect wall transformer from mains

Remove MH-Front following instructions in Section B-1

Note the position and orientation of the blue connectors on the emitter and detector

Remove the two blue connectors from the cradle sensors using needle nose pliers

Remove the cradle from the MH-Front

Pull at the cradle from the front with your fingers

Depress each tab of the cradle from the inside of the MH-Front with a flat blade screwdriver

Ensure the cradle is free to move out of the MH-Front

Align and install the replacement cradle

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