[time-nuts] HP 5061A Info requested
28bravo at comcast.net
Sat Dec 1 15:32:20 EST 2007
service at frequencystandards.com wrote:
> Hi Dennis,I would be glad to help you trouble shoot your 5061. I am out of
> the office on vacation until next Tuesday but can get you started on a few
> things. I don't have a spare copy of the 5061B manual but I believe
> someone said there is a copy on the Agilent web site archives of manuals.
> Unfortunately, not being in the office, I can't tell you off the top of my
> head what the web site url is.
> When you said it doesn't power up, do you mean that you have turned
> the meter position to supply and battery and they both read zero? I
> will assume for now that this is the situation. If true, first
> disconnect the internal battery if it has one. There is a plug on the
> A17 board to do this. Now, on the same board, check the voltage on
> the 18.7 test point and the 33V test point. If you look in your 5061A
> manual, the A17 board is the same board in both versions. A few
> different test points but located tha same place and looks almost the
> same. (I am assuming here that you have already checked your rear
> panel fuses.)
> If you have 18.7 volts within a few tenths of a volt, and 33 volts within
> a couple of volts, your main power supply board is probably all ok and
> your problem is somewhere else.
> It's crucial at this point to know exactly what the unit is doing
> though. I am going to wait for your reply before going further since
> I can write a lot that would be irrelevant depending on your actual
> symptoms and not my guessing.
> Can't guarantee I wil get back to you within a day but will try. Had
> to sneak in and check email after my wife and family went to bed. It's
> 1 am now so probably wont be able to get back on till early Sunday
> Chuck Norton
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
Thank you so much for taking the time to help me out with this issue. I
just measured the voltages, I see + 30.5 volts on the 30V line, 0 volts
on the 18.8 line. This leads me to assume that something is amiss on the
A-15 regulator board. Looking at A-15 outputs on the pcb edge connector:
Pin 4=0 v, pin 12=30.5v, pin 18=9.9 v, pin 15=0v. These readings may
make more sense when you have the schematic in front of you
Again, thanks so much, let me know where else to look.
More information about the time-nuts