Hi Jason,
I'm in Cambridge (UK not MA) so only 5 hours away ;-)
I'd concour with the other's comments, it's worth working on. First remove all input/output cards and put them away somewhere safe. You don't need them for the unit to run and if there is PSU fault you don't want to risk damaging them with an overvoltage. Un-plug the display module from the PSU and turn the unit ON. If the fans run and all the LED's light the display is faulty (not the end of the world). I'll assume you have a multimeter? If fans don't run, check for +12V on pin 38 (end pin at angled corner of PCB) of the power supply module when the unit is switched on. If this is not there check the on-off switch. If all the LED are off (except AC) the PSU is most likely faulty.
Robert G8RPI.
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--- In hp_agilent_equipment@..., "ghostman1166@..." <ghostman1166@...> wrote:
unfortuanately i live in the middle of nowhere!! so borrowing equipment isnt an option :( i live in the uk near northlew devon so if there are any other humans that live less than a days travel away please speak up (grins).
i guess i could trawl through and start by changeing any caps that look suspect. i am a complete beginner tho so there is always the fear of messing it up worse than it is! still nothing ventured..........
i took up electronics last year when a serious illness meant i had to give up work and i am somewhat confined to the house most days so i wanted a hobby to help keep boredom at bay! wish i had taken it up years ago its totaly fascinating, even simple stuff like making transistors switch on a relay give me a thrill :D thanks again for all the help!
--- In hp_agilent_equipment@..., "Tom Miller" <tmiller@> wrote:
Hi Jason,
Why don't you see if you can buy or borrow an ESR meter and go through the power supply capacitors. Many times, an electrolytic capacitor will fail open and the supply will stop working. I don't think it is too hard to pull the supply. Take pictures so you will know how to put it back together.
You might also state what hemisphere you are in. Who knows, maybe someone on this list might live next door to you and can collaborate in getting you back online.
Regards,
Tom
----- Original Message -----
From: ghostman1166@
To: hp_agilent_equipment@...
Sent: Friday, September 02, 2011 11:11 AM
Subject: [hp_agilent_equipment] Re: possiable power supply fault hp16500c
--- In hp_agilent_equipment@..., J <rpoz28cam@> wrote:
>
> Jason,
> ?
> I wouldn't loose much sleep over your equipment woes.? Older equipment will always need some repairs or maint of some form or another.? The equipment you pick up with 'no power' are sometimes the best pieces to get, they have not been tampered or altered from their original designs as much (rogue repair attempts).? ? Power supply failures or no signs of life? can be the best thing that happend to the machine? because some people just put it away .. on a shelf or in a closet for later review.? These can be really good jewels or treasures.? I bought a HP 34401 benchtop DMM (very nice? unit)? with no signs of life and come to find out, all that was wrong with it was it had a? blown .125/250v amp fuse which is the one used when operated on 220V instead of a .250 amp fuse.. so guess what? I replaced the fuse and the rear power input assembly (fractured inside the ITC connector) and shes like a brand new piece of equipment.. even passed calibration
> certification with flying colors.?
> ?
> Jon
> ?
>
> From: Alexandre Souza <alexandre.tabajara@>
> To: hp_agilent_equipment@...
> Sent: Friday, September 2, 2011 8:34 AM
> Subject: Re: [hp_agilent_equipment] possiable power supply fault hp16500c
>
>
> ?
> > If absolute worst comes to worst, you may be able to build up a power
> > supply from available units.
>
> There are some people on this list that has spare power supplies and may
> sell one for a cheap price to you. I believe they will enter in contact with
> you after this message :)
>
> Congratulations, the 16500C is a great tool, I have one myself :)
>
>
>
>
> [Non-text portions of this message have been removed]
>
thanks for the replays guys. this is realy good news!! i thought i was dead in the water. i have checked the fuse directly by the power socket on the machine and its fine, i also get the red led on the PSU board wich indicates the power board has power to light. currently checking the switches.
i have seen the flow chart in the service manual and it mentions the 120v led on the right hand side of the PSU, mine isnt lit and apparently should be.
feel much much happier now i have joined here! if anyone reading this has a compatiable supply they wish to sell please get in touch i am more than happy to pay a fair price :D.
likewise if anyone wants a pattern generator card(i will get the model number shortly)for a fair price or to do a swap let me know, in all honesty i cant see me ever having use for the generator! it has the cables but looks like there is no pods for the generator.
i will report back soon as i have tested the switches and will look for any on board fuses to check.
many thanks jason
[Non-text portions of this message have been removed]
