HP 3325A Function Generator crapped out

E

Ecnerwal

Guest
My HP3325A has moved from "working fine" to "brief flash of the LEDs
when the power button is pushed, then all goes dark" - and no indication
that things are behaving other than the displays (ie, blind button
punching does not get outputs.)

I have the manual and will work though it, but thought I'd ask if there
were any common issues that folks were aware of that I should look for
first when I go looking. Smells like some sort of power supply failure
at first guess, but I have not torn into ANYTHING, yet.

It's too nice (when working) to become a boat anchor.

Thanks!

--
Cats, coffee, chocolate...vices to live by
Please don't feed the trolls. Killfile and ignore them so they will go away.
 
On Saturday, January 10, 2015 at 10:31:04 PM UTC-5, Ecnerwal wrote:
My HP3325A has moved from "working fine" to "brief flash of the LEDs
when the power button is pushed, then all goes dark" - and no indication
that things are behaving other than the displays (ie, blind button
punching does not get outputs.)

I have the manual and will work though it, but thought I'd ask if there
were any common issues that folks were aware of that I should look for
first when I go looking. Smells like some sort of power supply failure
at first guess, but I have not torn into ANYTHING, yet.

It's too nice (when working) to become a boat anchor.

Thanks!

--
Cats, coffee, chocolate...vices to live by
Please don't feed the trolls. Killfile and ignore them so they will go away.
Click to expand...

It is made by hewlett Packard,, who are only half way good at making
scanners. Computers""?? FORget it. Switch brands. Ifyou're a loyal
nut, god help you.

MS
 
On Sat, 10 Jan 2015 11:26:06 -0500 Ecnerwal
<MyNameForward@ReplaceWithMyVices.Com.invalid> wrote in Message id:
<MyNameForward-F68E0E.11260610012015@88-209-239-213.giganet.hu>:

My HP3325A has moved from "working fine" to "brief flash of the LEDs
when the power button is pushed, then all goes dark" - and no indication
that things are behaving other than the displays (ie, blind button
punching does not get outputs.)

I have the manual and will work though it, but thought I'd ask if there
were any common issues that folks were aware of that I should look for
first when I go looking. Smells like some sort of power supply failure
at first guess, but I have not torn into ANYTHING, yet.

It's too nice (when working) to become a boat anchor.

Thanks!
Click to expand...

Power supply would be my first guess. It's been years since I worked on
one. Does that generator use Mostek ROMS?
 
On 01/12/2015 09:45 AM, Lynn wrote:
On Saturday, January 10, 2015 at 10:31:04 PM UTC-5, Ecnerwal wrote:
My HP3325A has moved from "working fine" to "brief flash of the LEDs
when the power button is pushed, then all goes dark" - and no indication
that things are behaving other than the displays (ie, blind button
punching does not get outputs.)

I have the manual and will work though it, but thought I'd ask if there
were any common issues that folks were aware of that I should look for
first when I go looking. Smells like some sort of power supply failure
at first guess, but I have not torn into ANYTHING, yet.

It's too nice (when working) to become a boat anchor.

Thanks!

--
Cats, coffee, chocolate...vices to live by
Please don't feed the trolls. Killfile and ignore them so they will go away.

It is made by hewlett Packard,, who are only half way good at making
scanners. Computers""?? FORget it. Switch brands. Ifyou're a loyal
nut, god help you.

MS
Click to expand...

"The wise speak only of what they know, Grima son of Galmod." ;)

HP used to be an instruments company, and built some of the most
beautiful, accurate, bulletproof instruments ever seen. I have probably
two dozen of them, including two 3325As, both of which need some relays
replaced but are otherwise in perfect condition. One of the nicest
low-frequency synthesizers ever.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net
 
In article <08e7ba150bshs0plcb78q4qftmhhtksinb@4ax.com>,
JW <none@dev.null> wrote:

>Does that generator use Mostek ROMS?

Not obvious from the manual. I'll have a look when I get under the cover.

--
Cats, coffee, chocolate...vices to live by
Please don't feed the trolls. Killfile and ignore them so they will go away.
 
In article <6bb7a969-1152-4b73-860b-d6401cd38e9a@googlegroups.com>,
Phil Hobbs <pcdhobbs@gmail.com> wrote:

Any luck, Lawrence?

Cheers

Phil Hobbs
Click to expand...

So far I haven't cleared the bench to get a look in; I'm moderately
slow, especially since the need is not too urgent. Had hopes for the
weekend but other things took up the time. I did ferret through the
manual and per the flowchart on page 8-31 I'm either looking at power
supply or logic (Group O or Group A) since the fan does start, but the
display (after that brief flash) is blank. Per figure 8-25 on page 8-22
the blower starting means the 5 v (unreg) supply is up though I'm having
a time trying to find that on the full schematic.

I also need to find my paper copy of the manual as the PDF is rather
annoying to use. This one I do have a paper copy (in hiding), the 5334A
I only have a PDF.

--
Cats, coffee, chocolate...vices to live by
Please don't feed the trolls. Killfile and ignore them so they will go away.
 
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