Disassembly and Repair 6
Keysight 33210A Service Guide 117
Troubleshooting Hints
This section provides a brief check list of common failures. Before troubleshooting
or repairing the instrument, make sure the failure is in the instrument rather than
any external connections. Also make sure that the instrument is accurately
calibrated within the last year (see “Calibration Interval” on page 58). The
instrument’s circuits allow troubleshooting and repair with basic equipment such
as a 6
½ digit multimeter.
Unit is Inoperative
– Verify that the ac power cord is connected to the instrument.
– Verify that the front-panel On/Standby switch has been pushed.
Is the display working?
– If the display appears blank, but front-panel keys are lit (and the fan is
working), the display screen saver may be enabled. Press any key to restore the
display.
– If the display appears blank, but front-panel keys are lit (and the fan is
working), the display contrast setting may be too low. Use the menu to
set the display contrast.
Unit Fails Self-Test
Ensure that all terminal connections (both front panel and rear terminals) are
removed while the self-test is performed.
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