Agilent 34970A/34972A Data Acquisition / Switch Unit

Chapter 6 Service
To Replace the Power-Line Fuse
To Replace the Power-Line Fuse
The power-line fuse is located on the rear panel of the instrument, near
the power line connector. A procedure to replace the fuse is given on page
50. Use a 500 mAT, 250 V fuse for all power line settings.
Troubleshooting Hints
4
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
page 73). The instrument’s circuits allow troubleshooting and repair with
basic equipment such as a 6½-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.
• Verify that the power-line fuse is installed and not open (see page 50).
The instrument is shipped from the factory with a 500 mAT,250 V
fuse.
• Verify the power-line voltage setting. See “If the Instrument Does Not
Turn On” on page 50.
6
• Remove all plug-in modules to verify that a plug-in module is not
causing the failure.
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