Welch Allyn PROPAQ CS - Manual (Page 98)

94 Repair procedures Welch Allyn Propaq CS Vital Signs Monitor
Replacing Expansion Module button board and buttons
The Expansion Module contains a button board that has electrical contact areas to detect
when an Expansion Module button is pressed. The front panel buttons are similar to the
monitor buttons. A plastic button and flexible contact touches the contact area on the
button board when a button is pressed.
Use the following procedure to remove the button board and buttons:
1. Remove the Expansion Module front panel ( “Replacing Expansion Module front
panel” on page 93).
2. Remove the two screws securing the button board to the front panel.
3. Remove the button board.
4. To remove each button, gently lift out the rubber portion of the button contact
attached to the inside of the front panel, then squeeze together the stem ends of the
button from the inside of the front panel while gently pushing it out of the button
channel.
When installing the button board,
• make sure all buttons are completely installed
• make sure the rubber button contact is seated onto the channel
• torque screws to 4.75 to 5.2 in-lb (0.54 to 0.59 N-m).
Note Do not touch the contact areas on the button board or the contact inside the
flexible contacts. Touching these areas may deposit oil on them, reducing the
ability of the parts to make electrical contact. If you touch these areas, clean them
with a cotton swab moistened with isopropyl alcohol.