5 Maintenance
162 Keysight U1253B User’s and Service Guide
Table 5-5 Basic troubleshooting procedures
Malfunction Troubleshooting procedure
No OLED display after switching ON – Check battery. Charge or replace battery.
No beeper tone
– Check the Setup mode to verify whether the beeper function has been set to OFF.
If so, select the desired driving frequency.
Failed to measure current – Check the fuse.
No charging indication
[a]
– Check 440 mA fuse.
– Check external DC adapter to ensure that its output is DC 24 V and that the plugs
are inserted properly into the charging terminals.
Battery life very short after full charge/
Battery not able to charge after pro-long
storage period
– Check if the correct rechargeable battery is used.
– Check if the correct nominal voltage level (7.2 V or 8.4 V) is selected in the battery
setting at Setup Mode.
– Try to charge and discharge for 2 or 3 cycles in order to maintain the battery’s
highest capacity.
– NOTE: The performance of the rechargeable battery may degrade with time.
Remote control failure
– The Keysight logo on the IR-USB cable connected to the multimeter should be
facing up.
– Check the baud rate, parity, data bit, and stop bit (default is 9600, None, 8, and 1)
in the Setup mode.
– Ensure that the required driver for IR-USB has been installed.
Notes for basic troubleshooting procedures table:
[a] Never turn the rotary switch of the multimeter from the OFF position when it is charging.
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