MSA FiveStar Instruction Manual download pdf (Page 31)

CAUTION

When removing the back of the case, be careful not to pull

the buzzer wire from the connector. This is a fragile connector;

use minimum force necessary to prevent breakage; breakage

of this wire is not covered under warranty. If removing the

connector, place a flat screwdriver at the back of the connector

and gently pry connector loose.

7. Remove the buzzer connector.

8. Disconnect the white ribbon connector from the main board

socket by CAREFULLY lifting up the brown locking tabs until

they stop (FIGURE 3-2).

9. Locate the edge of the main pc board that is furthest from the

display; grasp this edge and gently lift the board straight up

and away from the unit until it is free.

10. Holding the white connector, gently rock the main pc board

and pull it away from the connector.

NOTE: Retain foam rubber gasket accompanying pc board.

11. Connect the new main pc board to the white ribbon

connector by gently rocking the pc board into place; latch

down the two tabs located on either side of the ribbon socket.

12. Replace gasket and insert the new main pc board into

position; gently press down until the board snaps into place.

13. Reconnect the buzzer wire.

14. Replace the main pc board, ensuring gasket is appropriately

placed around the entire perimeter of the instrument.

CAUTION

When replacing the back of the case, tuck the buzzer wire

between the display board and the main board to prevent

damage to the wire.

15. Replace back of

the case and

tighten the six

case-mounting

screws securing

the back of

the case in the

Figure 3-2.

Display Connector

Technical Manual Chapter 3, Troubleshooting and Maintenance

FiveStar Alarm 3-5

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MSA FiveStar Instruction Manual Page 31