Main Printed Circuit Board Assembly - Welch Allyn Spot Vital Signs Service Manual

44 Disassembly and repair

Main printed circuit board assembly

Follow all the previous steps and then:
1. Remove the pneumatic tubing from the transducer on the main PCB.
Battery/Valve
Connector
Pneumatic Tubing
2. Remove the battery/valve cable connector from the bottom of the PCB.
3. Remove the 4 #10 Torx screws from the PCB.
4. Lift Main PCB from housing.
If the Spot Vital Signs uses SpO
the Main PCB and lift the SpO
5. Attach the existing SpO
then remove the three screws on the underside of
2
PCB off the main board (two main board connectors).
2
board to the new main board reusing all hardware.
2
Welch Allyn Spot Vital Signs
Torx Screws