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Re: possiable power supply fault hp16500c

 

Hi:

Ridge Quipment (www.ridgeequipment.com) has lots of these PSU for about $25. I keep a few spares for my 16500Cs. They are easy to swap out and impossible to fix.

Tom Leedy
Clarksburg, MD 20871

--- In hp_agilent_equipment@..., "ghostman1166@..." <ghostman1166@...> wrote:

hi guys i am new to electronics and need some advice.
first my tale of woe....i wont bore you with all the details but basicaly i was stupid and brought privately a hp16500c, i drove 250 miles to pick it up (met the guy in a carpark!! first big mistake), and purchased what i belived was a fully working logic analyzer. ok yes it was stupid.got it home and it's dead!!! . . .>
Re: possiable power supply fault hp16500c

J. Forster
 


ok made sure the lead is correct one. pulled all the cards out and still
no fans or anything else.
only led that is lit is the AC led. the 120v led isnt lit.
That may mean a simple repait.

Look at the mains rectifiers, internal fuse, caps. And be careful. There
should be several hundred volts DC in there. Also, look at "soft start"
components, like NTC thermistors, and EMI filters.


not sure where the video lead is, but will pull it when i work out where
it is :D.
pace is on my wish list but not sure what it is or what it looks like so
if anyone has a link to one i would be grateful.


the PSU on ebay would be an option as last resort. obviously i would
prefer a uk based one, but would get one from states if no other way.
i have also checked the switches and they seem fine. checked the voltage
switch and that is also corectly set to for uk voltage.
i am sure once i get it going (with your help that seems more than likely
:D ) it will prove to be a great bit of kit!!
i would also love a hp scope as and when funds allow, but unfortunately
the wife insists we feed the kids first so it will have to wait untill i
have some money :S
Look at Tek scopes too. A non-digital scope like a 465 can be a very good
choice.

-John

=====================
Looking for HP Logic Analyzer Accessory

Charlie
 

Hi. I am in need of a PGA-to-PLCC adaptor for use with my HP 16500C logic analyzer. The HP part or model number is E2434-63201.

Does anyone have one available that they would like to sell or does anyone know where one can be found?

Thanks for any help or guidance that anyone can provide.

Charlie Myers
Re: possiable power supply fault hp16500c

 

ok made sure the lead is correct one. pulled all the cards out and still no fans or anything else.
only led that is lit is the AC led. the 120v led isnt lit.
not sure where the video lead is, but will pull it when i work out where it is :D.
pace is on my wish list but not sure what it is or what it looks like so if anyone has a link to one i would be grateful.
the PSU on ebay would be an option as last resort. obviously i would prefer a uk based one, but would get one from states if no other way.
i have also checked the switches and they seem fine. checked the voltage switch and that is also corectly set to for uk voltage.
i am sure once i get it going (with your help that seems more than likely :D ) it will prove to be a great bit of kit!!
i would also love a hp scope as and when funds allow, but unfortunately the wife insists we feed the kids first so it will have to wait untill i have some money :S

--- In hp_agilent_equipment@..., "Tom Miller" <tmiller@...> wrote:

As suggested, remove all the cards and see if the supply will come up. It could be something simple. Are you getting an overvoltage or overcurrent light?

Just to check, is the voltage switch correctly set?



We'll get you going, trust us ;)


Regards,
Tom
USA




----- Original Message -----
From: ghostman1166@...
To: hp_agilent_equipment@...
Sent: Friday, September 02, 2011 2:14 PM
Subject: [hp_agilent_equipment] Re: possiable power supply fault hp16500c




thanks for all the sugestions!! it will take me a little while to work through them all, to answer the question on test equipment avaliable, i have managed to gather a few basics, so i have a fairly good DMM its not a fluke but its a pretty good tenma, i also have a DSO a rather old but trusty gould 2 channel 150mhz. i also have a temp controlled soldering station. and a bog standard spring loaded desoldering pump.
i will look into the transformer as that seems a sensoable idea to have one anyway. if someone is willing to have the supply sent to them to look at it for me and would like a pattern generator in return ;) :D .
i will have a go at the ideas posted so far but i think its best i refrain from desoldering lol. i will post later to update on progress :D
i must say i been on the net for years and never come across such a friendly and helpful bunch before! i feel at home already!
--- In hp_agilent_equipment@..., "ghostman1166@" <ghostman1166@> wrote:
>
> hi guys i am new to electronics and need some advice.
> first my tale of woe....i wont bore you with all the details but basicaly i was stupid and brought privately a hp16500c, i drove 250 miles to pick it up (met the guy in a carpark!! first big mistake), and purchased what i belived was a fully working logic analyzer. ok yes it was stupid.got it home and it's dead!!! not a single sign of life.i had a 2 hour flap and panick then downloaded the service and read it a couple of hundread times (ok maybe 10-12times) i have checked the leds and it appears the 120v led dosnt light. so am i right in thinking that its the PSU thats croaked it? or are there other things i can check.
> i would realy love to get it working as it took severn months to save up for it!! if it is the PSU is it possiable to get a replacement or can theese be fairly easilly fixed by an idiot?
> the machine has 2 timing cards and a pattern generator so i am reluctant to consign it to skip.
> many thanks for any help your able to give
> regards jason
>





[Non-text portions of this message have been removed]
[Fwd: [ForSale-Swap] HP 54502A 400 MHz Digital Sampling Oscilloscope REDUCED $275]

J. Forster
 

---------------------------- Original Message ----------------------------
Subject: [ForSale-Swap] HP 54502A 400 MHz Digital Sampling Oscilloscope
REDUCED $275
From: "Rob Frohne" <rob.frohne@...>
Date: Fri, September 2, 2011 11:46 am
To: "'For sale/trade'" <forsale-swap@...>
--------------------------------------------------------------------------

HP 54502A 400 MHz Digital Sampling Oscilloscope $275 plus shipping from
99324.

This is a nice oscilloscope, but I don't use it much and have another
oscilloscope too, and I'm trying to clean up my bench and shack. It
passes self test, works well and looks good. Photos available



73,

Rob
KL7NA

--
Rob Frohne, Ph.D., P.E.
E.F. Cross School of Engineering
Walla Walla University
100 SW 4th Street
College Place, WA 99324
(509) 527-2075

______________________________________________________________
ForSale-Swap mailing list
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Re: X-Y to VGA/USB converter

 

I'm also thinking of allowing replacement of built-in CRTs.
I have a LeCroy 9354AL where I could tap into the video signals
that go to the monitor to get an idea of bandwidth and other
characteristics.

Of course for that particular instrument someone else devised
a much nicer all-digital solution, but my interest is more general.
That particular oscilloscope line can be easily downscaled into
a smaller box if someone wanted to do so. I have to open mine up
anyway as it's due for an overdue recap, the switcher's ripple
starts to get on my nerves.

Cheers, Kuba
X-Y-Z to VGA/USB: 8566/68 XYZ specs

 

FYI: I've just got specs for 8566/68 SAs, and their X/Y outputs have
75ns risetimes. That is about 5MHz of bandwidth, so any suggestions
to use audio or similar low bandwidths will be of no use. The Z output
has 12MHz of bandwidth. This implies that X and Y outputs need sampling
with say 25MHz 12 bit converter, and Z needs a 60MHz 8 bit converter.

It'd be rather hard to push this as unprocessed data via USB, because
we need about 1 Gbit/s worth of bandwidth (that's without any overheads).

The USB interface, with its realistic bandwidth of about 350Mbits/s,
would be useful for direct sampling with lower sampling rates, OR
for sending compressed bitmap updates.

Cheers, Kuba
Re: possiable power supply fault hp16500c

Tom Miller
 

Ridge Equipment is in my backyard so to speak.

They are a very good group to deal with.


Tom

----- Original Message -----
From: Glen Slick
To: hp_agilent_equipment@...
Sent: Friday, September 02, 2011 2:11 PM
Subject: Re: [hp_agilent_equipment] Re: possiable power supply fault hp16500c



The same power supply is used in the 16500A, 16500B, 16500C mainframes
and the 16501A expansion frame.

Here's one in the US for $25, but then it cost another $60 for
shipping ot the UK.


-Glen




[Non-text portions of this message have been removed]
Re: possiable power supply fault hp16500c

J. Forster
 

I'll echo that.

BTW, silly question: Are you usaing the correct line cord?

-John

================

Ridge Equipment is in my backyard so to speak.

They are a very good group to deal with.


Tom


----- Original Message -----
From: Glen Slick
To: hp_agilent_equipment@...
Sent: Friday, September 02, 2011 2:11 PM
Subject: Re: [hp_agilent_equipment] Re: possiable power supply fault
hp16500c



The same power supply is used in the 16500A, 16500B, 16500C mainframes
and the 16501A expansion frame.

Here's one in the US for $25, but then it cost another $60 for
shipping ot the UK.


-Glen








------------------------------------

Yahoo! Groups Links
Re: possiable power supply fault hp16500c

Tom Miller
 

As suggested, remove all the cards and see if the supply will come up. It could be something simple. Are you getting an overvoltage or overcurrent light?

Just to check, is the voltage switch correctly set?



We'll get you going, trust us ;)


Regards,
Tom
USA

----- Original Message -----
From: ghostman1166@...
To: hp_agilent_equipment@...
Sent: Friday, September 02, 2011 2:14 PM
Subject: [hp_agilent_equipment] Re: possiable power supply fault hp16500c




thanks for all the sugestions!! it will take me a little while to work through them all, to answer the question on test equipment avaliable, i have managed to gather a few basics, so i have a fairly good DMM its not a fluke but its a pretty good tenma, i also have a DSO a rather old but trusty gould 2 channel 150mhz. i also have a temp controlled soldering station. and a bog standard spring loaded desoldering pump.
i will look into the transformer as that seems a sensoable idea to have one anyway. if someone is willing to have the supply sent to them to look at it for me and would like a pattern generator in return ;) :D .
i will have a go at the ideas posted so far but i think its best i refrain from desoldering lol. i will post later to update on progress :D
i must say i been on the net for years and never come across such a friendly and helpful bunch before! i feel at home already!
--- In hp_agilent_equipment@..., "ghostman1166@..." <ghostman1166@...> wrote:
>
> hi guys i am new to electronics and need some advice.
> first my tale of woe....i wont bore you with all the details but basicaly i was stupid and brought privately a hp16500c, i drove 250 miles to pick it up (met the guy in a carpark!! first big mistake), and purchased what i belived was a fully working logic analyzer. ok yes it was stupid.got it home and it's dead!!! not a single sign of life.i had a 2 hour flap and panick then downloaded the service and read it a couple of hundread times (ok maybe 10-12times) i have checked the leds and it appears the 120v led dosnt light. so am i right in thinking that its the PSU thats croaked it? or are there other things i can check.
> i would realy love to get it working as it took severn months to save up for it!! if it is the PSU is it possiable to get a replacement or can theese be fairly easilly fixed by an idiot?
> the machine has 2 timing cards and a pattern generator so i am reluctant to consign it to skip.
> many thanks for any help your able to give
> regards jason
>
Re: possiable power supply fault hp16500c

J. Forster
 

A spring or bulb desoldering unit is ok for a connection or two, along
with Solder-Wick, but it's really not suited for pulling all the
componrents off a PCB.

You really need something like a Pace if you are going to do more than a
few components. They can often be got on eBay for $50-$100. Worth every
penny, IMO.

Best,

-John

============


thanks for all the sugestions!! it will take me a little while to work
through them all, to answer the question on test equipment avaliable, i
have managed to gather a few basics, so i have a fairly good DMM its not a
fluke but its a pretty good tenma, i also have a DSO a rather old but
trusty gould 2 channel 150mhz. i also have a temp controlled soldering
station. and a bog standard spring loaded desoldering pump.
i will look into the transformer as that seems a sensoable idea to have
one anyway. if someone is willing to have the supply sent to them to look
at it for me and would like a pattern generator in return ;) :D .
i will have a go at the ideas posted so far but i think its best i refrain
from desoldering lol. i will post later to update on progress :D
i must say i been on the net for years and never come across such a
friendly and helpful bunch before! i feel at home already!
--- In hp_agilent_equipment@..., "ghostman1166@..."
<ghostman1166@...> wrote:

hi guys i am new to electronics and need some advice.
first my tale of woe....i wont bore you with all the details but
basicaly i was stupid and brought privately a hp16500c, i drove 250
miles to pick it up (met the guy in a carpark!! first big mistake), and
purchased what i belived was a fully working logic analyzer. ok yes it
was stupid.got it home and it's dead!!! not a single sign of life.i had
a 2 hour flap and panick then downloaded the service and read it a
couple of hundread times (ok maybe 10-12times) i have checked the leds
and it appears the 120v led dosnt light. so am i right in thinking that
its the PSU thats croaked it? or are there other things i can check.
i would realy love to get it working as it took severn months to save up
for it!! if it is the PSU is it possiable to get a replacement or can
theese be fairly easilly fixed by an idiot?
the machine has 2 timing cards and a pattern generator so i am reluctant
to consign it to skip.
many thanks for any help your able to give
regards jason
Re: possiable power supply fault hp16500c

 

thanks for all the sugestions!! it will take me a little while to work through them all, to answer the question on test equipment avaliable, i have managed to gather a few basics, so i have a fairly good DMM its not a fluke but its a pretty good tenma, i also have a DSO a rather old but trusty gould 2 channel 150mhz. i also have a temp controlled soldering station. and a bog standard spring loaded desoldering pump.
i will look into the transformer as that seems a sensoable idea to have one anyway. if someone is willing to have the supply sent to them to look at it for me and would like a pattern generator in return ;) :D .
i will have a go at the ideas posted so far but i think its best i refrain from desoldering lol. i will post later to update on progress :D
i must say i been on the net for years and never come across such a friendly and helpful bunch before! i feel at home already!

--- In hp_agilent_equipment@..., "ghostman1166@..." <ghostman1166@...> wrote:

hi guys i am new to electronics and need some advice.
first my tale of woe....i wont bore you with all the details but basicaly i was stupid and brought privately a hp16500c, i drove 250 miles to pick it up (met the guy in a carpark!! first big mistake), and purchased what i belived was a fully working logic analyzer. ok yes it was stupid.got it home and it's dead!!! not a single sign of life.i had a 2 hour flap and panick then downloaded the service and read it a couple of hundread times (ok maybe 10-12times) i have checked the leds and it appears the 120v led dosnt light. so am i right in thinking that its the PSU thats croaked it? or are there other things i can check.
i would realy love to get it working as it took severn months to save up for it!! if it is the PSU is it possiable to get a replacement or can theese be fairly easilly fixed by an idiot?
the machine has 2 timing cards and a pattern generator so i am reluctant to consign it to skip.
many thanks for any help your able to give
regards jason
Re: possiable power supply fault hp16500c

 

The same power supply is used in the 16500A, 16500B, 16500C mainframes
and the 16501A expansion frame.

Here's one in the US for $25, but then it cost another $60 for
shipping ot the UK.


-Glen
Re: possiable power supply fault hp16500c

J. Forster
 

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).
Doesn't that put pretty much anybody in the UK within range?

i guess i could trawl through and start by changeing any caps that look
suspect.
Shotgunning is not a good idea, especially irf you don't have good solder
sucking gear and know how to use it. You may well do more damage than
good.

i am a complete beginner tho so there is always the fear of
messing it up worse than it is! still nothing ventured..........
A couple of things:

Get yourself a line (mains) isolation transformer so you don't kill
yourself. Worst case, a coyuple of 230:115 transformers can be connected
baxck-to-back to serve. Make sure they are NOT autotransformers.

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!
Switching power supplies are mostly a pretty standard design.

Line rectifier
Inverter
Transformer
Rectifiers
Regulators

The first three are common to all supplies. If you have the time, trace
out the circuit. That'll help a lot.

Are any of the supplies working?

Best,

-John

===================

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,
> 茂驴陆
> I wouldn't loose much sleep over your equipment woes.茂驴陆 Older
equipment will always need some repairs or maint of some form or
another.茂驴陆 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).茂驴陆 茂驴陆 Power
supply failures or no signs of life茂驴陆 can be the best thing that
happend to the machine茂驴陆 because some people just put it away .. on a
shelf or in a closet for later review.茂驴陆 These can be really good
jewels or treasures.茂驴陆 I bought a HP 34401 benchtop DMM (very nice茂驴陆
unit)茂驴陆 with no signs of life and come to find out, all that was
wrong with it was it had a茂驴陆 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.茂驴陆
> 茂驴陆
> Jon
> 茂驴陆
>
> 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
>
>
> 茂驴陆
> > 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 :)
>
>
>
>
>
>
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
Re: possiable power supply fault hp16500c

Tom Miller
 

Can you give us some detail as to what test equipment you have access to?

Do you have a scope? a DMM?


Maybe you could send the supply to someone who has the ability to test and repair it.

----- Original Message -----
From: ghostman1166@...
To: hp_agilent_equipment@...
Sent: Friday, September 02, 2011 12:07 PM
Subject: [hp_agilent_equipment] Re: possiable power supply fault hp16500c



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]
>





[Non-text portions of this message have been removed]
Re: possiable power supply fault hp16500c

 

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.

--- 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,
> 脗
> I wouldn't loose much sleep over your equipment woes.脗 Older equipment will always need some repairs or maint of some form or another.脗 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).脗 脗 Power supply failures or no signs of life脗 can be the best thing that happend to the machine脗 because some people just put it away .. on a shelf or in a closet for later review.脗 These can be really good jewels or treasures.脗 I bought a HP 34401 benchtop DMM (very nice脗 unit)脗 with no signs of life and come to find out, all that was wrong with it was it had a脗 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.脗
> 脗
> Jon
> 脗
>
> 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
>
>
> 脗
> > 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]
Re: possiable power supply fault hp16500c

 

Jason,
听
You might want to start by identifying all the power supply rails and do some simple resistance readings which might lead you to shorted caps etc.听 Service documentation would be my first move on this one, then I would check out those supply rails looking for the obvious maybe burnt / stressed parts, i.e. hot spots then moving towards shorted caps / diodes.听 75 - 90 % of most diagnostics can be done with a good fluke dmm.听 If this one has a SMPS (switch mode powersupply) then things get a bit more complicated due to the I sense feedback loops most rails provide back to error amps within the power supply.听 I understand you have a led that is illuminated on the power supply assembly.听 Sometimes this can simply be a reference led indicating the vRefs are alive and well that provide the power to the voltage regulators and error amps.听 Look for shorted tantalums or electrolytics, these are a big problem in equipment these days.
听
Jon
听

From: "ghostman1166@..." <ghostman1166@...>
To: hp_agilent_equipment@...
Sent: Friday, September 2, 2011 11:07 AM
Subject: [hp_agilent_equipment] Re: possiable power supply fault hp16500c


听
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,
脗
I wouldn't loose much sleep over your equipment woes.脗 Older equipment will always need some repairs or maint of some form or another.脗 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).脗 脗 Power supply failures or no signs of life脗 can be the best thing that happend to the machine脗 because some people just put it away .. on a shelf or in a closet for later review.脗 These can be really good jewels or treasures.脗 I bought a HP 34401 benchtop DMM (very nice脗 unit)脗 with no signs of life and come to find out, all that was wrong with it was it had a脗 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.脗
脗
Jon
脗

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


脗
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]
Re: possiable power supply fault hp16500c

 

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,
> 脗
> I wouldn't loose much sleep over your equipment woes.脗 Older equipment will always need some repairs or maint of some form or another.脗 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).脗 脗 Power supply failures or no signs of life脗 can be the best thing that happend to the machine脗 because some people just put it away .. on a shelf or in a closet for later review.脗 These can be really good jewels or treasures.脗 I bought a HP 34401 benchtop DMM (very nice脗 unit)脗 with no signs of life and come to find out, all that was wrong with it was it had a脗 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.脗
> 脗
> Jon
> 脗
>
> 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
>
>
> 脗
> > 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]
Re: possiable power supply fault hp16500c

Tom Miller
 

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
Re: possiable power supply fault hp16500c

 

--- In hp_agilent_equipment@..., J <rpoz28cam@...> wrote:

Jason,
脗听
I wouldn't loose much sleep over your equipment woes.脗听 Older equipment will always need some repairs or maint of some form or another.脗听 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).脗听脗听Power supply failures or no signs of life脗听can be the best thing that happend to the machine脗听because some people just put it away .. on a shelf or in a closet for later review.脗听 These can be really good jewels or treasures.脗听 I bought a HP 34401 benchtop DMM (very nice脗听unit)脗听with no signs of life and come to find out, all that was wrong with it was it had a脗听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.脗听
脗听
Jon
脗听

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


脗听
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
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