Welch Allyn Wall Transformer 76726

Disconnect wall transformer from mains before servicing.

Unplug power cord from bottom of wall transformer unit.

Connect new plug to IEC connector.

Ensure no disassembly is required for the new plug installation.

Refer to 767 Wall Transformer Instructions PN767036.

Connect the main unit as a power supply

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

Check if the handle output is the same as for the main unit

Perform functional check of handle rheostat for smooth typical operation

Articulate coil cord and check for intermittent connections

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.

Ensure all primary components are replaced

Connect the Welch Allyn tester T-13251

Is the ground leakage current less than 50 microamps?

Test between the following parts

Disconnect wall transformer from mains before servicing

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

Squeeze the plastic spring clips on the sides of the switch to force it out of the MH-Front

Align the lighted half of the switch rocker toward the cradles

Disconnect each wire from the old switch one by one and connect to the same terminal on the replacement switch

Press the switch into the MH-Front

Verify wiring conforms to Fig. 1