I just discovered the partial schematic you attached.
Thank you! That will be of great assistance.
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Hi Yves,
Thank you for the insight.
If you have the Agilent part numbers for the components I listed, that might prove helpful.
Regards,
Keith Harvey
Hi Keith,
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I checked my 34410A and my 34465A, and unfortunately, I don't have a 34461A.
However, they all have the same function to perform, that is to say from +10V, provide a voltage of +3.3V, +1.2V and possibly +2.5V.
A switcher lowers a DC voltage from about +10V to +3.3V, the frequency of the switcher is about 1.3MHz for both instruments.
The 34461A has the same part numbers as the 34465A, there is a very good chance that the 34465A and 34461A have the same circuit for the section concerned.
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I don't know if this can help you, but you have an idea of ??the damaged circuit.
I don't have the part numbers unfortunately, only the marking codes or the Keysight part numbers.
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I repaired a 34461A a few months ago, the +3.3V switch was not damaged, but there was a short circuit on the +3.3V line caused by a faulty capacitor.
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Waveform measured at output switcher connected to coil.
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Yves
