SECTION 5
5.1
5.2 Troubleshooting
MAINTENANCE AND
TROUBLESHOOTING
Periodic Service
This section provides periodic maintenance, calibration and troubleshooting information.
Except for periodic cleaning and calibration, no routine service 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.
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 question regarding repair should be directed to the Service
Department, Sorensen Company, Division of Elgar Electronics Corporation, 1-800-458-4258.
CAUTION!
Potentially lethal voltage exists in the power circuit and the output of high voltage
models. Filter capacitors store potentially dangerous energy for some time after
power is removed. Only experienced technical personnel should make repairs.
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.
5.2.1 Preliminary Checks
If the power supply displays any unusual or erratic shut the power supply off immediately
and disconnect it from the AC power source. Check all loads, 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 re–testing proceed with internal troubleshooting as described below.
Operation Manual 51
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