Troubleshooting Guides; Troubleshooting - General Guide - Thermo Scientific 49i Instruction Manual

Troubleshooting

Troubleshooting Guides

Troubleshooting
6-2 Model 49i Instruction Manual
The troubleshooting guides presented in this chapter are designed to help
Guides
isolate and identify instrument problems.
Table 6-1
checks that you should perform if you experience an instrument problem.
Table 6-2
and provides recommendations about how to resolve the alarm condition.
Table 6-1. Troubleshooting - General Guide
Malfunction
Does not start up
Cell A or B
frequency high
Cell A and B frequency
high
Cell A or B frequency
low or zero
Cell A and B frequency
low or zero
provides general troubleshooting information and indicates the
lists all the alarm messages you may see on the graphics display
Possible Cause
No power
Power supply
Light adjustment
Defective detector
Lamp supply
Light adjustment
One cell excessively contaminated
Defective detector
Dirty cells
Light adjustment
Action
Check that the instrument is
plugged into the proper
source (115 or 220 volts)
Check instrument fuses
using a voltmeter
Check power supply voltages
Readjust Lamp Setting.
From the Service Mode
menu choose Lamp Setting.
Interchange detectors at
Measurement Interface
Board connectors to
determine if detector is
defective.
Check for 1.7 volt peak to
peak waveform at lamp
current check point on Lamp
Power Supply Board
Readjust lamp setting. From
the Service Mode menu
choose Lamp Setting.
Clean cell
Interchange detectors at
Measurement Interface
Board connectors to
determine if detector is
defective
Clean cells
Check for 1.7 volt peak to
peak waveform at lamp
current check point on Lamp
Power Supply Board
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