SECTION V
MAINTENANCE
5-1 INTRODUCTION
5-5 Table 5-1 lists the test equipment required to
perform the various procedures described in this section.
5-6 PERFORMANCE TEST
5-2 Upon receipt of the power supply, the performance
test of paragraph 5-6 can be made. This test is suitable for
incoming inspection. Section III contains a quick but less
comprehensive checkout procedure that can be used in lieu
of the performance test if desired.
5-3 If a fault is detected in the power supply while
making the performance test or during normal operation,
proceed to the troubleshooting procedure in paragraph 5-32.
After troubleshooting and repair, repeat the performance
test to ensure that the fault has been properly corrected and
that no other faults exist. Before performing any mainte-
nance checks, turn on the power supply and allow a half
hour warm-up.
5-4 TEST EQUIPMENT REQUIRED
5-7 The following test can be used as an incoming
inspection check and appropriate portions of the test can
be repeated to check the operation of the instrument after
repairs. If the correct result is not obtained for a particular
check, proceed to the troubleshooting procedures of para-
graph 5-32.
———
CAUTION
———
Before applying power to the supply, make
certain that its line voltage selector switch
(S3) is set for the line voltage to be used. (See
CAUTION notice in paragraph 3-2 for addi-
tional information on S3.)
Table 5-1. Test Equipment Required
5-1
REQUIRED RECOMMENDED
TYPE CHARACTERISTICS USE MODEL
Digital Sensitivity: 100mV full scale Measure dc voltages: HP 3490A
Voltmeter (min.). Input impedance: calibration procedures
10 megohms (min.).
Variable Range: 90-130 Vac Vary ac input -----
Voltage Equipped with voltmeter
Transformer accurate within 1 volt
Oscilloscope Sensitivity: 100µV/cm. Display transient re- HP 180C with 1821A,
Differential input. sponse and ripple and and 1801A or 1803A
noise waveforms. plug-ins.
Repetitive Rate: 60 Hz, 2µs Measure transient See Figure 5-5.
Load Sw. rise and fall time response.
Resistive Value: See paragraph 5-11. Power supply load James G. Biddle
Loads Tolerance: ±5% resistor (fixed resistor ("Lubri-Tact"
or rheostat). Rheostat)
Current Value: See paragraph 5-13. Measure output current Simpson Portable
Sampling Accuracy: 1% (minimum) Shunt, 06703.
Resistor (Shunt)
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