SORENSEN DCS SERIES MANUAL MAINTENANCE
4-1
SECTION 4. MAINTENANCE, TROUBLESHOOTING, AND CALIBRATION
4.1 General
This section provides periodic maintenance, calibration and troubleshooting information.
4.2 Periodic Service
No routine service except for periodic cleaning is required. Whenever a unit is removed from service, it should be
cleaned, using denatured or isopropyl alcohol or an equivalent solvent on the metal surfaces and a weak solution of
soap and water for the front panel. Low pressure compressed air may be used to blow dust from in and around
components on the printed circuit boards.
4.3 Troubleshooting
Units requiring repair during their warranty period should be returned to Sorensen for service. Unauthorized
repairs performed by anyone other than Sorensen Company during the warranty period may void the warranty.
Any questions regarding repair should be directed to the Service Department, Sorensen Company, Division of
Elgar Company.
CAUTION!
POTENTIALLY LETHAL VOLTAGES EXIST IN THE POWER CIRCUIT AND
THE OUTPUT OF HIGH VOLTAGE MODELS. Filter capacitors store potentially
dangerous energy for some time after power is removed. Repairs should be attempted by
experienced technical personnel only. Be sure to isolate the power supply from the input
line with an isolation transformer when using grounded test equipment such as an
oscilloscope in the power circuit.
4.3.1 Preliminary Checks
If the power supply displays any unusual or erratic operation shut the power supply off immediately and disconnect
it from the AC power source. Check all load, programming and monitoring connections and circuits. Check the
AC input for correct voltage and frequency. Correct any problems found and retest the system. If no problems are
found or the unit fails to operate correctly upon retesting proceed with internal troubleshooting as described below.
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