Keysight Technologies 34972A - Page 177

Service 6
Keysight 34970A/34972A Service Guide 177
To check the power supplies, remove the instrument cover as shown on page 184.
The power supplies can be checked from the bottom of the instrument as shown
below. Be sure to use the correct ground point when checking the supplies.
WARNING
–Exposed Mains
– Do not Touch!
Chassis
Earth Reference
+5 V Earth Referenced
-18 V float
3 V battery
+18 V float
+5 V float
6 Vrms filament
Ground Float
+
_