iL Series User Manual
70
Rev B
California Instruments
7.3 Troubleshooting Procedure
Table 45 gives the troubleshooting procedure to isolate a fault to a circuit board or
particular circuit.
Step
Symptom
Corrective
Action
1
No output voltage/front panel display and fan off
go to
Figure 21
2
No or limited output/front panel display and fan on
go to
Figure 22
3
Turn-on Self Test Error
Error 1 Non-volatile RAM RD0 section checksum failed
Error 2 Non-volatile RAM CONFIG section checksum failed
Error 3 Non-volatile RAM CAL section checksum failed
Error 4 Non-volatile RAM WAVEFORM section checksum failed
Error 5 Non-volatile RAM STATE section checksum failed
Error 6 Non-volatile RAM LIST STATE section checksum failed
Error 10 RAM selftest
Error 11 to 18 DAC selftest, tests 1 through 8
1
1
1
1
1
1
2
2
1 Re-initialize unit and re-calibrate. If unit still has RAM error, replace the A8 DSP board. To re-initialize
unit, turn CAL ON then press 0 and 9 simultaneously. Press scroll key to model number then press
enter. When unit is re-initialized all CAL data, user defined WAVEFORM data and LIST data are
erased.
2 Replace A8 DSP board.
Table 45 : Specific Troubleshooting Procedures
7.3.1 TROUBLESHOOTING HINTS
•
If the AC power source operates properly but does not deliver full output power
capability, check the AC main fuses.
•
All amplifiers (A1, A2, A3) may be interchanged for troubleshooting purposes.
7.3.2 General Measurement Techniques
Measure the output voltage directly at the sense terminals. Select an adequate
gauge wire for load tests using the procedures given in the operating manual for
connecting the load.
7.3.3 Current-Monitoring Resistor
The four-terminal, current-monitoring resistor (current shunt) is required to eliminate
output current measurement error caused by voltage drops in leads and
connections. To eliminate output current measurement error caused by voltage
drops in the leads and connections, connect the current-monitoring resistor as a four
terminal device.
Summary of Contents for 3000iL
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