2 Service and Maintenance
50 Keysight U1270 Series Service Guide
Troubleshooting
If the instrument fails to operate, check the batteries and the test leads. Replace
them if necessary. If the instrument still does not function, check the operating
procedures in this manual. When servicing, use only the specified replacement parts.
The table below will assist you in identifying some basic malfunctions.
To avoid electrical shock, do not perform any servicing unless you are
qualified to do so.
Any repair or service which is not covered in this manual should only be
performed by qualified personnel.
Table 2-1 Operating checklist
Malfunction Identification
No display when powered ON using the rotary
switch
✔ Verify the batteries health and replace batteries as necessary.
No beeper tone ✔ Verify that the beeper is enabled in the multimeter’s setup mode.
Failed on current measurement ✔ Verify the fuses health and replace the fuses as necessary.
Failed on remote control
✔ Verify the optical side of the IR-USB cable connected to the multimeter —
the Keysight logo should be facing up.
✔ Verify the baud rate, data bit, and parity settings in the multimeter’s setup
mode. (Default values are 9600, 8, and none.)
✔ Verify that the driver for the IR-USB interface is installed.
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