Service 5
Keysight E3633A and E3634A Service Guide 117
Troubleshooting Hints
This section provides a brief check list of common failures. Before troubleshooting
or repairing the power supply, make sure that the failure is in the instrument
rather than any external connections. Also make sure that the instrument is
accurately calibrated. The power supply’s circuits allow troubleshooting and
repair with basic equipment such as a digital multimeter and a 100 MHz
oscilloscope.
Unit is inoperative
– Verify that the ac power cord is connected to the power supply.
– Verify that the front-panel power switch is depressed.
– Verify that the power-line fuse is installed:
Use the 6.3 AT, 250 V fuse for 100 or 115 Vac operation.
Use the 3.15 AT, 250 V fuse for 230 Vac operation.
– Verify the power-line voltage setting.
See “To prepare the Power Supply for Use” on page 28.
Unit reports errors 740 to 750
These errors may be produced if you accidentally turn off power of the unit during
a calibration or while changing a non-volatile state of the instrument.
Recalibration or resetting the state should clear the error. If the error persists, a
hardware failure may have occurred.
This instrument contains CMOS integrated circuits which are susceptible to
failure due to electrostatic discharge. Refer to the ‘‘Electrostatic Discharge
(ESD) Precautions’’ section earlier in this chapter for further handling
precautions.
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