Keysight E4980A - Page 53

Keysight E4980A/E4980AL Precision LCR Meter 53
Troubleshooting
Function Specific Troubleshooting
Procedure
Step 1. Disconnect the power cable from the E4980A/ E4980AL and allow 1 minute
for the internal capacitors to discharge.
Step 2. Remove the Handler Interface Board according to the procedure for
describing in “Handler Interface” Chapter of the User’s Guide.
Step 3. Set the jumpers and switch on the handler interface board to the same
settings as when the board is shipped from the factory. Refer to Figure 4-10,
Table 4-5, and Table 4-6.
Figure 4-10 Jumper, and Switch Settings
D
angerous energy/voltage exists when the E4980A/ E4980AL is in
operation, and for a time after it is powered down. Allow 1 minutes for the
internal capacitors to discharge.
The interface board contains electronic components that can be damaged
by static electricity through electrostatic discharge (ESD). To prevent ESD
damage, maintain frequent contact with any bare sheet metal surface on
the chassis. A grounding wrist strap (or similar device) is useful for this
purpose. Handle the board carefully at all times. Avoid touching electronic
components or circuit paths.
Before performing Step 3, note the jumper and switch settings on the
handler interface board in order to return them to the same settings at the
end of this function test.
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