Agilent Technologies 8453 Operator's Manual page 178

Table 20
Table 21
Diagnostics and Troubleshooting
Error Messages
Multicell Transport Home Position Not Found
Possible Causes
The multicell transport mechanism is
jammed.
Electronics failed.
Lamp Door Open (Lamps Are Switched Off)
Possible Causes
Lamp door is open.
Lamp door is bent. Light switch tab is
positioned incorrectly.
Light switch or electronics have failed.
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Action
Make sure the carriage can move freely along
its entire path and that there are no
obstructions
Check that the two screws which fix the
multicell transport in the spectrophotometer
are not pushed up into the path of the
mechanism (e.g. this is the case when putting
the transport beside the instrument).
Check for defective HOME-switch, defective
multicell transport cable, defective motor, or
defective spectrophotometer processor main
(SPM) board.
Action
Close lamp door.
Bend light switch tab on lamp door to correct
tab position.
Replace spectrophotometer lamp power
supply (SLS) board.