HP 5890 SERIES II Service Manual page 63

11. Disconnect the EFS tubing from their connec-
tion sites at the tubing ends. (Label the tubes
as to their respective flow channel (" A"or " B" )
to ensure an identical connection to the re-
placement EFS module.)
12. Free the EFS module by removing two screws.
The module can then be removed from its com-
partment in the side of the instrument.
13. Remove the connector from the EFS. Notice
the locking tab at each end of the plug. Re-
lease the locking tabs and pull the plug straight
out from its receptacle.
WHEN DISCONNECTING A PLUG, PULL ON THE PLUG NOT ON ITS WIRES. PULLING
ON THE WIRES MAY CAUSE BREAKAGE.
14. Remove the EFS module from the instrument.
15. Install the replacement EFS module in its compartment.
16. Secure the EFS module to the instrument using two screws.
17. Connect the plumbing to the EFS module.
18. Restore the gas supply to the instrument module (both channels, " A"and " B" ), and check for
leaks at all installed fittings.
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Locking Tabs
SVC 3- 20
P11