Agilent Technologies 8453 Operator's Manual page 182

Table 29
Table 30
Diagnostics and Troubleshooting
Error Messages
Cooling Fan Defective
Possible Causes
Number of cycles per minute sensed at fan is
too low. Fan is defective.
Number of cycles per minute sensed at fan is
too low. Electronics failed.
Digital Signal Processor Error
Possible Causes
SIMM memory module on SPM board
missing or in wrong position.
Communication error between the main
processor and one of the digital signal
processors located on the SPM or SDA board.
Cable between SDA board and SPM board
disconnected or defective.
Communication error between the main
processor and one of the digital signal
processors located on the SPM or SDA board.
Electronics failed.
76
Action
Replace cooling fan.
Replace spectrophotometer processor main
(SPM) board.
Action
Make sure a module of minimum 1 MB is
plugged into the position located towards the
front panel of the instrument.
Reconnect or replace cable.
Replace spectrophotometer processor main
(SPM) board.
Replace the spectrophotometer data
acquisition (SDA) board.