Welch Allyn PROPAQ CS Service Manual page 106

102 Repair procedures
Removing the Stick Board from the SSP Board
1. Disconnect the tubing from the pump and pressure transducer PT2 on the front-
facing side of the SSP Board and the pneumatic reservoir on the rear-facing side.
2. Remove the two screws from the front-facing side of the SSP Board that secure two
slotted nylon Stick Board retainers.
3. Pull the Stick Board up to free it from connector J7 and remove it from the SSP Board.
For Stick Board replacement purposes, leave all tubing as removed connected to the
Stick Board.
When reconnecting the Stick and SSP Boards:
• reconnect the two Boards (connector J7)
• install retainers onto Stick Board
• install screws into retainers to secure the Stick Board (torque to 2.5 in-lb or 0.28 N-m)
• reconnect tubing to the pump, transducer PT2, and the pneumatic reservoir (route
tubing exactly as removed)
When reinstalling the SSP/Stick Assembly into the front panel:
• reconnect water trap switch to J4 on the SSP Board
• from a vertical position, insert left edge of SSP Board into retaining tabs on the inside
of the front panel plastic
• align tubing as originally configured to allow access for connections and to prevent
pinching
• connect tubing to the water trap, using rounded, non-serrated pliers only
• lower the right side of the SSP/Stick Assembly and slide the left side into the retaining
tabs to properly seat the Boards into the front panel assembly (check all tubing and
cable routing to make sure that none are pinched).
• connect exhaust port tubing, using rounded, non-serrated pliers only
• secure screws through SSP Board to front panel (torque to 5.0 in-lb or 0.56 N-m)
When reinstalling the front panel on the Expansion Module:
• connect J1 and J3 to the SSP Board
• route printer cable in front of printer motor
• fit front panel to the main Expansion Module Chassis
• secure front panel with four screws (torque to 3.5 in-lb or 0.40 N-m)
WARNING Failure to connect the exhaust post tubing may allow concentration
of oxygen inside of the monitor and create a potential explosion risk.
WARNING To ensure that all tubing is properly connected after servicing SCO
perform the "Sidestream CO2 verification procedure"
complete.
Welch Allyn Propaq CS Vital Signs Monitor
on page 36 when
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2