Welch Allyn Propaq Encore, Service Manual

Page: 91 / 130

Service Manual Repair Procedures 87
Replacing the MSP/SpO
2
Circuit Boards
This describes how to replace the MSP/SpO
2
circuit boards in the expansion module with
a CO
2
option. To replace SpO
2
boards in the SpO
2
module and the expansion module
without a CO
2
option installed, see “Replacing the SpO2 Circuit Boards” on page 86.
1. Open the expansion module ( “Opening the Expansion Module Rear Panel” on
page 79).
2. Unplug the flex-cable connector J5 from the MSP board, but do not attempt to
remove the mainstream CO
2
connector side panel.
3. Disconnect the speaker cable from the MSP board and remove the speaker side
panel.
4. Remove the three screws securing the MSP board and SpO
2
board to the rear panel
(see the figure above).
5. Lift out the two circuit boards and SpO
2
patient connector side panel as a unit. (The
side panel easily slides out.)
6. Using equal pressure on both sides of the connector, disconnect the patient
connector side panel connector from the SpO
2
circuit board.
7. Disconnect the two circuit boards by gently pulling them apart.
When installing the MSP/SpO
2
circuit boards:
• plug the two circuit boards together
• connect the patient connector side panel connector to the SpO
2
circuit board
Caution When replacing the MSP/SpO2 circuit boards, remove both circuit
boards with the patient connector side panel still connected. Attempting to
disconnect the patient connector side panel from the SpO2 circuit board before
removing both circuit boards with the side panel can damage the flex-cable
between the side panel and the SpO2 circuit board.
Caution In the next step, the connector securing clips are fragile and will break
if not handled carefully.
Flexible
Connector J5
Speaker
Cable