Maintenance And Troubleshooting; General; Inspection And Cleaning; Calibration - Lambda ESKI Instruction Manual

5 MAINTENANCE AND TROUBLESHOOTING

5.1 GENERAL

A regularly scheduled preventative maintenance consisting of a thorough cleaning of
interior and a visual inspection of the components on the circuit boards and heatsinks
mounted on the chassis floor. A relatively clean location would require at least one
inspection every six months.

5.2 INSPECTION AND CLEANING

CAUTION: Always disconnect AC power from the supply before removing the cover.
5.2.1 Remove the (12) 6-32 screws from the covers.
5.2.2 Remove the wrap-around cover by lifting upward.
5.2.3 Check for loose wire connections, burn marks etc...
5.2.4 Remove dust from in and around parts with a small brush or compressed air.
5.2.5 Check the fan to be sure it operates freely and turns when power is applied.
Whenever power is applied and removed, all capacitors should be
discharged through a 10 Ohm resistor before any contact with the circuit.

5.3 CALIBRATION

This procedure applies to the adjustment and calibration of a properly functioning unit
only. Any malfunction must be corrected before proceeding with calibration. Remove the
top cover to make these calibrations.
This Power Supply contains very lethal voltage and no work should be attempted unless
the person doing the work is a highly trained electronic technician who has studied the
schematics and understands how the circuit operates and takes safety measures to
prevent injury.
(Note the location of parts: the 100 numbers are on the A100 PCB, the
300 numbers are on the A300 board, etc...)
Equipment required:
1. Oscilloscope - Dual trace, 60 MHz, isolated from ground,
2. Shunt - 50 Amp 100 mV Empro HA50-100
3. Multimeter -
4. Load - 6kW Resistive load 3.1 Ohm
Unless the power supply is found to be outside the normal tolerance, no adjustment
should be attempted.
5.3.1 CURRENT METER
DANGER LETHAL VOLTAGES
Philips PM3267 or equivalent.
Fluke 360 or equivalent.
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83-475-001 Rev. D
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