83-507-013 Rev. A
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CHAPTER 9 MAINTENANCE
9.1 INTRODUCTION
This Chapter provides information about maintenance, calibration and troubleshooting.
9.2 UNITS UNDER WARRANTY
Units requiring repair during the warranty period should be returned to a Lambda authorized service facil-
ity. Refer to the addresses listing on the back cover of this User’s Manual. Unauthorized repairs per-
formed by other than the authorized service facilities may void the warranty.
9.3 PERIODIC MAINTENANCE
No routine maintenance of the power supply is required except for periodic cleaning. To clean,
disconnect the unit from the AC supply and allow 30sec. For discharging internal voltages. The front
panel and the metal surfaces should be cleaned using a mild solution of detergent and water. The
solution should be applied onto a soft cloth, and not directly to the surface of the unit. Do not use
aromatic hydocarbons or chlorinated solvents for cleaning. Use low pressure compressed air to blow
dust from the unit.
9.4 ADJUSTMENTS AND CALIBRATION
No internal adjustment or calibration is required. There is NO REASON to open the power supply cover.
9.5 PARTS REPLACEMENT AND REPAIRS
As repairs are made only by the manufacturer or by authorized service facilities, no parts replacement
information is provided in the manual. In case of failure, unusual or erratic operation of the unit, contact a
Lambda sales or service facility nearest you. Please refer to the Lambda sales offices addresses listing
on the back cover of this User’s Manual.
9.6 TROUBLESHOOTING
If the power supply appears to be operating improperly, use the Troubleshooting Guide (Table 9-1) to
determine whether the power supply, load or external control circuit are the cause.
Configure the power supply for basic front panel operation and perform the tests of Section 3.8 to deter-
mine if the problem is with the supply.
Table 9-1 provides the basic checks that can be performed to diagnose problems, with references to
Sections of this User’s Manual for further information.
Table 9-1: Troubleshooting guide
SYMPTOM CHECK ACTION
REF
Is the AC power cord
defective?
Check continuity, replace if
necessary.
3.7
No output. All displays and
indicators are blank.
Is the AC input voltage
within range?
Check AC input voltage.
Connect to appropriate
voltage source.
3.6
3.7
Output is present momentarily
but shuts Off quickly. The
display indicates “AC”.
Does the AC source
voltage sag when load is
applied?
Check AC input voltage.
Connect to appropriate
voltage source.
3.6
Output is present momentarily
but shuts off quickly.The
display indicates “OUP”.
Is the power supply
configured to Remote
sense?
Check if the positive or
negative load wire is loose.
3.9.6
3.9.8
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