Welch Allyn Wall Transformer 76714

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, pg. 2 to remove MH-Front

Replace both line fuses when one is blown; snap them out with a screwdriver

Use only appropriate Welch Allyn replacement fuses and insert into fuse holders

Test unit to find cause and effects of the over-current

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.

Connect main unit as a power supply

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

Verify handle output matches main unit

Perform functional check of handle rheostat for smooth operation

Articulate coil cord and check for intermittent connections

Refer to Appendix for resistor configuration

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