¿ªÔÆÌåÓý

  1. HP-Agilent-Keysight-Equipment
  2. Messages
Expanded Topics Messages
Date
Hp 8720ES error help

 

¿ªÔÆÌåÓý

Hello I am trying to get a 8720ES working. It has a CPU board fault. The CPU board start some but not fully.

I get an error saying:

Please stand by- Error INST

This error I cannot find info on anywhere. Maybe someone can help me ?

best regards Peter
Re: HP8560a smoke came out

 

Glenn,
You have activated the delta marker function, so what is shown if the "normal marker" function is activated?

My first idea on the big bang was an exploding RIFA cap on the AC mains input. Did You check this?
73
Henning Weddig
DK5LV
Re: HP 427A no DC offset adj. pot

 

Probably so Paul. ?I do wonder if the lack of manuals for this particular version of the 427A is because it was a military/govt. version that is just now being phased out. ?Agree on the beat up surplus. ?I just looked at a couple of pieces up for auction too rough for me. ?I will say however, over the past two years I've picked up a HP 8601A that had been stored in a hermetically sealed bag, a Sencore SC-61 O'scope that was literally new/unused in its original box (probes and all), as well as a Boonton 92EA and Sencore LC-53 that were in great shape. ?Maybe between here and over at antiqueradios someone will come through with a manual for this version.

Leon...
Re: HP 427A no DC offset adj. pot

 

Leon
I did look at the other site great pix and thats a nice looking meter. Normally gov stuff is pretty beat up.
Suggestion. If the meter is off as little as you say does it make sense to simply use the meter mechanical zero to get rid of it?
Paul
Re: HP8560a smoke came out

 

If you are in 230V country sure I would bet on explosion of RIFA caps in the power supply. Not difficult to repair it, just power supply board needs to be removed from SA. Whe you are in, check also condition of electrolytic caps.

Regarding level of calibration signal, you have enabled delta-marker not absolute value measurement. This is the reason to show that "high" level.

Vladimir


Kopie
Datum Sat, 30 Mar 2024 12:28:26 +0000
±Ê?±ð»å³¾¨§³Ù Re: [HP-Agilent-Keysight-equipment] HP8560a smoke came out

Don't know that exact model, but could it be mains power I/P filter / Rifa line filter caps?

On 30/03/2024 04:11, glenn percy via groups.io wrote:

New member here.

I have an HP 8560A? SA which had been in storage for some years. On powering it up recently it worked ok for about 10 minutes, then a loud bang and smoke came out........ not good.

After looking over the boards on each side that can be easily opened out, I checked carefully for any obvious damage and found nothing.? Basically, looking for blown caps and/or IC's.

When powering up initially it showed errors 301 and 317.? It went through the initial alignment on power up ok.

?Later, I powered up again and it went through the initial alignment on power up ok, again.
Feeding the CAL signal in (300MHz -10dBm) it shows correct 289MHz, but level is 26dBm. Note it doesn't show -26dBm.??No error messages shown.

From what I can tell, these relate to something more internal than can easily be got at.? ? Looking for ideas on the problem maybe, I am guessing? a blown Capacitor or similar.

Open to ideas and especially how you get to the internal workings of this SA.? ie from which side should one work to get in there and any hints or pictures on how to do so.

Glenn

Attachments:
Re: HP8560a smoke came out

 

¿ªÔÆÌåÓý

Don't know that exact model, but could it be mains power I/P filter / Rifa line filter caps?

On 30/03/2024 04:11, glenn percy via groups.io wrote:

New member here.

I have an HP 8560A? SA which had been in storage for some years. On powering it up recently it worked ok for about 10 minutes, then a loud bang and smoke came out........ not good.

After looking over the boards on each side that can be easily opened out, I checked carefully for any obvious damage and found nothing.? Basically, looking for blown caps and/or IC's.

When powering up initially it showed errors 301 and 317.? It went through the initial alignment on power up ok.

?Later, I powered up again and it went through the initial alignment on power up ok, again.
Feeding the CAL signal in (300MHz -10dBm) it shows correct 289MHz, but level is 26dBm. Note it doesn't show -26dBm.??No error messages shown.

From what I can tell, these relate to something more internal than can easily be got at.? ? Looking for ideas on the problem maybe, I am guessing? a blown Capacitor or similar.

Open to ideas and especially how you get to the internal workings of this SA.? ie from which side should one work to get in there and any hints or pictures on how to do so.

Glenn

Attachments:
HP8560a smoke came out

 

New member here.

I have an HP 8560A? SA which had been in storage for some years. On powering it up recently it worked ok for about 10 minutes, then a loud bang and smoke came out........ not good.

After looking over the boards on each side that can be easily opened out, I checked carefully for any obvious damage and found nothing.? Basically, looking for blown caps and/or IC's.

When powering up initially it showed errors 301 and 317.? It went through the initial alignment on power up ok.

?Later, I powered up again and it went through the initial alignment on power up ok, again.
Feeding the CAL signal in (300MHz -10dBm) it shows correct 289MHz, but level is 26dBm. Note it doesn't show -26dBm.??No error messages shown.

From what I can tell, these relate to something more internal than can easily be got at.? ? Looking for ideas on the problem maybe, I am guessing? a blown Capacitor or similar.

Open to ideas and especially how you get to the internal workings of this SA.? ie from which side should one work to get in there and any hints or pictures on how to do so.

Glenn
Re: Dead 54720D

 

I have the contents of the version 4.04 installation diskette.
Re: HP 427A no DC offset adj. pot

 

I¡¯d like to think so Paul. It sure would be nice to have a copy of the appropriate manual though to remove doubt. I also posed this question over on antique radios.com with some photos of the A2 board. If anyone is interested the link to the thread is: ?

³¢±ð´Ç²Ô¡­
Re: HP-1421A Q109 Voltages

 

The 1821A is very similar for the reset lamp circuit, the voltages are negative on the base, picture below is from the repair of my 1821A, the lamp had failed in that one.


David
Re: HP-1421A Q109 Voltages

 

Copy/paste didn't work.
HP 1821 has almost the same circuit.
Ozan
===


On Fri, Mar 29, 2024 at 02:05 PM, Ozan wrote:
HP has almost the same exact circuit with -8.5V in one state (lamp is on) and -11.4V (lamp is off) in another state. Looking at 1421 schematic, few voltages look like typos.?
Ozan
?


On Fri, Mar 29, 2024 at 01:50 PM, Hugh Gilbert wrote:
-8.8V seems much more plausible, with the emitter -9.4V
?
Hugh Gilbert

On Fri, Mar 29, 2024 at 4:02?PM n4buq <n4buq@...> wrote:
Chuck,

Thank you so much for that.? I couldn't tell if that was a + or a - in front of the base voltage but that shows it clearly as +.

Thanks again,
Barry - N4BUQ

----- Original Message -----
> From: "ChuckA" <chuck@...>
> To: "HP-Agilent-Keysight-equipment" <[email protected]>
> Sent: Friday, March 29, 2024 2:38:15 PM
> Subject: Re: [HP-Agilent-Keysight-equipment] HP-1421A Q109 Voltages

> Here's a clean scan of the section you are looking at.
>
> ChuckA
>
> On 3/29/2024 3:16 PM, n4buq wrote:
>> Does anyone have a readable schematic for the A101 board in a 1421A?? I have a
>> paper manual on order but until that arrives, I would appreciate finding out
>> the voltages shown for Q109 (Page 5-16, Figure 5-9).? From what I can tell, the
>> online scan appears to show:
>>
>> C: +48V
>> B: -8.8V
>> E: -9.4V
>>
>> The value for B is particularly blurry but would like to know for sure what all
>> of those are.
>>
>> Thanks,
>> Barry - N4BUQ
>>
>>
>>
>>
>>
>>
>
> --
> See Early TV at:
>
>
>
>
>
>





Re: HP-1421A Q109 Voltages

 

HP has almost the same exact circuit with -8.5V in one state (lamp is on) and -11.4V (lamp is off) in another state. Looking at 1421 schematic, few voltages look like typos.?
Ozan
?


On Fri, Mar 29, 2024 at 01:50 PM, Hugh Gilbert wrote:
-8.8V seems much more plausible, with the emitter -9.4V
?
Hugh Gilbert

On Fri, Mar 29, 2024 at 4:02?PM n4buq <n4buq@...> wrote:
Chuck,

Thank you so much for that.? I couldn't tell if that was a + or a - in front of the base voltage but that shows it clearly as +.

Thanks again,
Barry - N4BUQ

----- Original Message -----
> From: "ChuckA" <chuck@...>
> To: "HP-Agilent-Keysight-equipment" <[email protected]>
> Sent: Friday, March 29, 2024 2:38:15 PM
> Subject: Re: [HP-Agilent-Keysight-equipment] HP-1421A Q109 Voltages

> Here's a clean scan of the section you are looking at.
>
> ChuckA
>
> On 3/29/2024 3:16 PM, n4buq wrote:
>> Does anyone have a readable schematic for the A101 board in a 1421A?? I have a
>> paper manual on order but until that arrives, I would appreciate finding out
>> the voltages shown for Q109 (Page 5-16, Figure 5-9).? From what I can tell, the
>> online scan appears to show:
>>
>> C: +48V
>> B: -8.8V
>> E: -9.4V
>>
>> The value for B is particularly blurry but would like to know for sure what all
>> of those are.
>>
>> Thanks,
>> Barry - N4BUQ
>>
>>
>>
>>
>>
>>
>
> --
> See Early TV at:
>
>
>
>
>
>





Re: HP-1421A Q109 Voltages

 

That's what I kept thinking - especially since everything else that's connected to the base is negative.? Could that be a typo?

Barry - N4BUQ

-8.8V seems much more plausible, with the emitter -9.4V

Hugh Gilbert

On Fri, Mar 29, 2024 at 4:02?PM n4buq <n4buq@...> wrote:
Chuck,

Thank you so much for that.? I couldn't tell if that was a + or a - in front of the base voltage but that shows it clearly as +.

Thanks again,
Barry - N4BUQ

----- Original Message -----
> From: "ChuckA" <chuck@...>
> To: "HP-Agilent-Keysight-equipment" <[email protected]>
> Sent: Friday, March 29, 2024 2:38:15 PM
> Subject: Re: [HP-Agilent-Keysight-equipment] HP-1421A Q109 Voltages

> Here's a clean scan of the section you are looking at.
>
> ChuckA
>
> On 3/29/2024 3:16 PM, n4buq wrote:
>> Does anyone have a readable schematic for the A101 board in a 1421A?? I have a
>> paper manual on order but until that arrives, I would appreciate finding out
>> the voltages shown for Q109 (Page 5-16, Figure 5-9).? From what I can tell, the
>> online scan appears to show:
>>
>> C: +48V
>> B: -8.8V
>> E: -9.4V
>>
>> The value for B is particularly blurry but would like to know for sure what all
>> of those are.
>>
>> Thanks,
>> Barry - N4BUQ
>>
>>
>>
>>
>>
>>
>
> --
> See Early TV at:
>
>
>
>
>
>






Re: HP-1421A Q109 Voltages

 

-8.8V seems much more plausible, with the emitter -9.4V

Hugh Gilbert


On Fri, Mar 29, 2024 at 4:02?PM n4buq <n4buq@...> wrote:
Chuck,

Thank you so much for that.? I couldn't tell if that was a + or a - in front of the base voltage but that shows it clearly as +.

Thanks again,
Barry - N4BUQ

----- Original Message -----
> From: "ChuckA" <chuck@...>
> To: "HP-Agilent-Keysight-equipment" <[email protected]>
> Sent: Friday, March 29, 2024 2:38:15 PM
> Subject: Re: [HP-Agilent-Keysight-equipment] HP-1421A Q109 Voltages

> Here's a clean scan of the section you are looking at.
>
> ChuckA
>
> On 3/29/2024 3:16 PM, n4buq wrote:
>> Does anyone have a readable schematic for the A101 board in a 1421A?? I have a
>> paper manual on order but until that arrives, I would appreciate finding out
>> the voltages shown for Q109 (Page 5-16, Figure 5-9).? From what I can tell, the
>> online scan appears to show:
>>
>> C: +48V
>> B: -8.8V
>> E: -9.4V
>>
>> The value for B is particularly blurry but would like to know for sure what all
>> of those are.
>>
>> Thanks,
>> Barry - N4BUQ
>>
>>
>>
>>
>>
>>
>
> --
> See Early TV at:
>
>
>
>
>
>





HP342A Noise Figure Meter Operating and Service Manual

 

If you have the meter and desire the original detailed service manual complete with fold out schematics
error correction graphs, theory of operation...

Please PM direct.?

Serials prefixed 416--- xxx
hp p/n 00342-90001


Thanks,?
Re: HP-1421A Q109 Voltages

 

Chuck,

Thank you so much for that. I couldn't tell if that was a + or a - in front of the base voltage but that shows it clearly as +.

Thanks again,
Barry - N4BUQ

----- Original Message -----
From: "ChuckA" <chuck@...>
To: "HP-Agilent-Keysight-equipment" <[email protected]>
Sent: Friday, March 29, 2024 2:38:15 PM
Subject: Re: [HP-Agilent-Keysight-equipment] HP-1421A Q109 Voltages
Here's a clean scan of the section you are looking at.

ChuckA

On 3/29/2024 3:16 PM, n4buq wrote:
Does anyone have a readable schematic for the A101 board in a 1421A? I have a
paper manual on order but until that arrives, I would appreciate finding out
the voltages shown for Q109 (Page 5-16, Figure 5-9). From what I can tell, the
online scan appears to show:

C: +48V
B: -8.8V
E: -9.4V

The value for B is particularly blurry but would like to know for sure what all
of those are.

Thanks,
Barry - N4BUQ





--
See Early TV at:

www.myvintagetv.com
Re: 85719A Noise Figure Measurements Personality for HP8595A

 

On Thu, Mar 28, 2024 at 10:44 PM, hardyhansendk wrote:

You are correct-this analyzer must have hardware option 119(noise fgure) for use with ?85719A.Its not difficult to transfer this program via gpib.

Regarding the expensive ram cards used for this analyzer series¡­just use the cards made for HP 48 calculators,much cheaper.

Yes, there is a process to have "downloadable programs" sent to the 8595E.? I do need to get the program though!
Re: HP-1421A Q109 Voltages

 

Here's a clean scan of the section you are looking at.

ChuckA

On 3/29/2024 3:16 PM, n4buq wrote:
Does anyone have a readable schematic for the A101 board in a 1421A? I have a paper manual on order but until that arrives, I would appreciate finding out the voltages shown for Q109 (Page 5-16, Figure 5-9). From what I can tell, the online scan appears to show:

C: +48V
B: -8.8V
E: -9.4V

The value for B is particularly blurry but would like to know for sure what all of those are.

Thanks,
Barry - N4BUQ




--
See Early TV at:

www.myvintagetv.com

1421A_pg5-16.jpg

HP-1421A Q109 Voltages

 

Does anyone have a readable schematic for the A101 board in a 1421A? I have a paper manual on order but until that arrives, I would appreciate finding out the voltages shown for Q109 (Page 5-16, Figure 5-9). From what I can tell, the online scan appears to show:

C: +48V
B: -8.8V
E: -9.4V

The value for B is particularly blurry but would like to know for sure what all of those are.

Thanks,
Barry - N4BUQ
Re: HP 427A no DC offset adj. pot

 

Is it possible that the unit is late enough that its using a 0 offset opamp and wouldn't need that pot? I did look at the online schematic and do see what your talking about. But maybe they were not needed later on.?
Hard to believe.
Paul
WB8TSL
8861 - 8880 of 151510