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Electronics Forum / Equipment / July 2008HP 6032A power supply schematics
I'm looking for the schematic diagram of the AC input section with the inrush limit circuitry. I have the service manual dated september 2000, but this manual is probably of a later date than my PS. There are differences that I cannot sort out. The relays K1 and K2 differ, as well as the output filter section. In my case there is a large transformer/inductor, where my docs show various discrete components. The serial number is: 3510A-10885. The problem I have is that the inrush limit circuitry seems to not work, and the line fuses blow. Can anyone help me? Thanks, Anders Johansson >I'm looking for the schematic diagram of the AC input section with the >inrush limit circuitry. [quoted text clipped - 7 lines] > >The serial number is: 3510A-10885. This means that your unit has serial prefix 3510A, which means the 10th week of 1995 is when this design was finalized and put into production. (HP started this practice in 1960, so 1960 + 35 = 1995.) If you look at the title page of the manual you have, it will tell which serial prefixes it covers. If your manual is later than your PS, then there may be "backdating" information at the rear of the manual that will help you. Otherwise, you may want to look for a 3510A manual. HP (now Agilent) has many of their older manuals available for download on their web site. - ----------------------------------------------- Jim Adney jadney@vwtype3.org Madison, WI 53711 USA ----------------------------------------------- Jim, thanks for valuable information. This explains why I could not figure out how to interpret the serial number. Unfortunately I could not find any 3510A manuals either. Back to the drawing board ... Best regards, Anders J > >I'm looking for the schematic diagram of the AC input section with the > >inrush limit circuitry. [quoted text clipped - 25 lines] > Madison, WI 53711 USA > ----------------------------------------------- Hi, That manual is suitable. If you look at the back you will find the table that shows how to backdate it. See p137 rhs column. the serial number sequence is there - Changes 1, 3-4 Those changes are to part values only, so the general schematics are the same, probably changes due to obsolescence Greg > Jim, thanks for valuable information. > This explains why I could not figure out how to interpret the serial [quoted text clipped - 36 lines] >> Madison, WI 53711 USA >> ----------------------------------------------- Hi Greg, My A1 board i physically very different from the layout in the inrush section with K1 and K2. The schematic seems to be the same but I can't find my problem, so my thinking is that I am physically not measuring what want to measure. It behaves as if K1 is NOT connecting the inrush limiting resistors at turn on, but I "know" they are in the circuit. Anders > Hi, > That manual is suitable. If you look at the back you will find the table [quoted text clipped - 46 lines] > >> Madison, WI 53711 USA > >> ----------------------------------------------- >Jim, thanks for valuable information. >This explains why I could not figure out how to interpret the serial number. >Unfortunately I could not find any 3510A manuals either. I hope you understood that you're looking for a HP6032A manual for serial prefix, not just a 3510A manual. I found a manual at agilent.com for a 6032 with serial number above US38321026, so it looks like Agilent may have changed their serial number practice. Offhand, however, I'm guessing that the first 4 digits still have the same meaning, so this would be a manual for models made starting in early 1998. If this is closer to than what you have, you can get it at: http://cp.literature.agilent.com/litweb/pdf/5959-3344.pdf Looking at the back of that manual, I see that it has backdating info for the 3510A, which is only 3 changes. The changes consist of one resistor value and a couple of diode part # changes. So this should be a good manual for you. It may seem annoying, but HP/Agilent had a philosophy of constant striving for improvements, so they often sold their products under the same model number for many years, while occasionally changing the internal design, and the serial prefix. HP is one of the few cases I can think of where a later revision of a design is always going to be better. They were never into revamping a design just to make it cheaper and save money. Bill & Dave ran a great show, and they're probably turning over in their graves considering what's being done under their names today. - ----------------------------------------------- Jim Adney jadney@vwtype3.org Madison, WI 53711 USA ----------------------------------------------- Thanks again. I did misunderstand at first, and looked for a 3510A manual. Obviously without any success. Strangely enough the manual that you link to in your post has the exact same Agilent Part No as the one I have, printed in september 2000, etc. And it is identical to my copy of the "same" manual... ALMOST. The component location pages differ, and the pages in YOUR manual correspond to what I have in my power supply. I have found the problem in my current inrush limit circuitry. The explanation is at least as strange as the manual issue above. The cable from the front panel power switch was incorrectly connected to the circuit board, from the factory. It has never worked as it should. I obviously looked for a failure, and not this kind of problem, and this took some time to figure out. I first believed that my measurement results were caused by incorrect thinking in combination with the wrong component location diagram. Thanks for valuable input, and a link to the correct service manual. I do believe however that my manual originally comes from the same place as yours. Strange indeed... Anders J > >Jim, thanks for valuable information. > >This explains why I could not figure out how to interpret the serial number. [quoted text clipped - 34 lines] > Madison, WI 53711 USA > ----------------------------------------------- |
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