Service And Maintenance; Troubleshooting; Operating Checklist - Keysight U1242C Service Manual

2

Service and Maintenance

Troubleshooting

To avoid electrical shock, do not perform any servicing unless you are
WARNING
qualified to do so.
Any repair or service which is not covered in this manual should only be
CAUTION
performed by qualified personnel.
If the multimeter fails to operate, check the batteries and the test leads. Replace
them if necessary. If the multimeter still does not function, check the operating
procedures in this manual. When servicing, use only the specified replacement
parts.
The following table will assist you in identifying some basic malfunctions.
Table 2-1

Operating checklist

Mal function
No display when powered ON using the rotary switch ✔ Verify the batteries health and replace batteries as necessary.
No beeper tone
Failed on current measurement
Failed on remote control
56
Identification
✔ Verify that the beeper is enabled in the multimeter's Setup mode.
✔ Verify the fuses health and replace the fuses as necessary.
✔ 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.
Keysight U1241C/U1242C Service Guide