Re: Agilent 34461A schenmatic
¿ªÔÆÌåÓý? As specified in the last email, I don't have the part numbers unfortunately, only the marking codes or the Keysight part numbers. Also, I can't find these part numbers on the Keysight website. ? If I were in your situation, I would first look for a 1.3MHz 8 pin switcher with the same package. And from the circuit and the coil value, I would try to see if the pin out seems compatible, and if the installed coil would be compliant with a 1.3MHz operating frequency. ? A friend of mine probably has a 34461A that he could lend me, but don't expect to have more details on the part numbers, but I could take the waveforms at the switcher pins. I am not absolutely sure that the switcher of the 34461A and 34465A are identical because I do not have a detailed photo of this section for the 34461A, but the coil value is the same. ? ? ? De?: [email protected] <[email protected]> De la part de Keith Harvey ? 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 From: [email protected] <[email protected]> on behalf of Yves Tardif <yves_tardif@...>
Sent: Monday, October 7, 2024 11:58 AM To: [email protected] <[email protected]> Subject: Re: [HP-Agilent-Keysight-equipment] Agilent 34461A schenmatic ? Hi Keith, ? 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. ? 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. ? 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. ? Waveform measured at output switcher connected to coil. ? Yves |