Exchanging Internal Parts - Agilent Technologies 1100 Series Reference Manual

4
Repairing the ALS Thermostat Module

Exchanging Internal Parts

The following procedures require opening the main cover of the ALS thermostat.
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Always ensure the ALS thermostat is disconnected from the line power when the
main cover is removed. The security lever at the power input socket prevents that
the pump cover is taken off when line power is still connected.
To disconnect the ALS thermostat from line, unplug the power cord. The power
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supply still uses some power, even if the switch on the front panel is turned off.
When opening capillary or tube fittings solvents may leak out. Please observe
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appropriate safety procedures (for example, goggles, safety gloves and protective
clothing) as described in the material handling and safety data sheet supplied by the
solvent vendor, especially when toxic or hazardous solvents are used.
The electronics of the ALS thermostat will not allow operation when the top cover and the
NO TE
top foam are removed. A safety light switch on the main board will inhibit the operation of
the ALS thermostat. Always operate the ALS thermostat with the top foam and top covers
in place.
Internal components may be sensitive to electrostatic discharge (ESD). Always use an
CAU TI O N
ESD kit when handling internal parts.
The procedures in this section describe how to exchange internal parts. You
must remove the ALS thermostat from the stack in order to open the main
cover.
62 1100 Series AT Reference Manual