Table of Contents
Service
I . Make sure capacitor A4OC3 is good.
2. Replace U I .
8·E·47. Inaccuracies At Lowar Frequencies (Filter
8-E-48. This failure is most likely caused by the Averag-
8-E-6
ing Amp (A40U I2 and associated circuitry) in the RMS
Converter. Make sure A4OQ21 is on (when the 3456A's
Analog Filter is enabled), and Q22 and Q23 are ofr.
Check and make sure the logic turns the correct FET On
1nl.
and Off, before replacing the suspected defective
Model 3456A
FET.
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Troubleshooting
