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3 - Troubleshooting
Test Equipment Required
Table 3-1 lists the test equipment required to troubleshoot the power supply. Recommended models are
listed.
Table 3-1. Test Equipment Required for Troubleshooting
Type
Purpose
GPIB Controller
To communicate with the supply via the
GPIB interface
Digital Voltmeter
To check various voltage levels
Oscilloscope
To check waveforms and signal levels
Electronic Load
To test operation of current circuit
Ammeter/Current
To measure output current
Shunt
Overall Troubleshooting
Overall troubleshooting procedures for the power supply are given in the Figure 3-1. The procedures first
check that neither an AC input, nor a bias supply failure is causing the problem and that the supply passes
the turn-on self test (error annunciator stays off). The normal turn-on, self-test indications are described in
the "Checkout Procedure" in Chapter 3 of the User's Guide.
If the supply passes the self test and there are no obvious faults, you should perform the verification
procedures in Chapter 2 from the front panel to determine if any functions are not calibrated or are not
operating properly. Then program and read back a voltage via the GPIB to see if the supply responds
properly to bus commands. If the supply fails any of the tests, you will be directed to the applicable flow
chart or troubleshooting procedure.
Flow Charts
Troubleshooting flow charts are given in Figure 3-1 sheets 1-4. The flow charts may make reference to test
points shown in the block diagrams and on the component location diagrams listed in Chapter 6.
24
Recommended Model
HP Series 300
Agilent 3458A
Agilent 54504A/54111A
Agilent 6060B
Guildline 9230/15
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Table of Contents
Troubleshooting
