Technical data

2Service
Troubleshooting Hints
56 E3632A Service Guide
Some circuits produce their own local bias supplies from the
main bias supplies. Be sure to check that these local bias
supplies are active. In particular, the ADC (analog- to- digital
converter), AC input, and front panel sections have local
bias supplies. Always check that the power supplies are free
of AC oscillations using an oscilloscope. Failure of bias
supplies will cause many self- test failures.
Table 2 - 2 Bias supplies voltages (serial MY53xx6xxx)
Bias supply Minimum Maximum Check at
+3.3 V Floating +3.135 V +3.465 V U23 pin 3
+15 V Floating +14.25 V +15.75 V Anode of CR7
–15 V Floating –14.25 V –15.75 V Cathode of CR23