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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
facility. Refer to the addresses listing on the back cover of this manual. Unauthorized repairs
performed 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 voltage. The front
panel and the metal surfaces should be cleaned using 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 hydrocarbons 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 manual.
9.6 TROUBLESHOOTING
If the power supply appears to operating improperly, use the troubleshooting guide 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
determine if the problem is with the supply.
Table 9-1 provides the basic checks that can be performed to diagnose problems, and references to
sections of this manual for further information.
Table 9-1: Troubleshooting guide
SYMPTOM
No output. All displays and
indicators are blank.
Output is present momentarily
but shuts off quickly. The display
indicates "AC".
CHECK
Is the AC power cord
defective?
Is the AC input voltage
within range?
Does the AC source voltage
sag when load is applied?
65
ACTION
Check continuity, replace
if necessary.
Check input AC voltage.
Connect to appropriate
voltage source.
Check input AC voltage.
Connect to appropriate
voltage source.
REF.
3.7
3.6
3.7
3.6
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