Keysight U1241AN, User'S And Service Manual

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4 Service and Maintenance
54 Keysight U1241AN User’s and Service Guide
Troubleshooting
If the instrument fails to operate, check the batteries and test leads, and replace
them if necessary. If the instrument still does not function, check the identification
procedures as described in Table 4-1 .
When servicing, use the specified replacement parts only. The Table 4-2 shows
the replacement part numbers.
WARNING
To avoid electrical shock, do not perform any service unless you are qualified
to do so.
Table 4-1 Basic troubleshooting hints
Malfunction Identification
No LCD display after
power ON
Check the battery polarity and replace batteries if necessary. Ensure that the replaced batteries are new
batteries, it is recommended not to mix old batteries with new batteries.
No beeper tone Check setup mode and verify if the beeper is set to OFF. Then select the desired driving frequency.
Failed on current
measurement
Check the fuse.
Table 4-2 List of replacement part number
Part number Description
U1241-44407 U1241AN front housing
U1241-64401 Bottom case and lens assembly
U1241-46401 Battery cover
U1241-44701 Multimeter stand
U1241-60002 LCD display
2110-1400 Fast blow fuse 1000 V, 0.44 A (10 mm x 35 mm)
2110-1402 Fast blow fuse 1000 V, 11 A (10 mm x 35 mm)