Re: Agilent 54622D with broken digital inputs - Fixable?

#143271

Asking politely was part of the process. :) The gold was recovered from the solution and the Nobel Committee had the medals recast from that.

--Tom

-- 
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070

Show quoted text

On 4/9/2024 1:31 AM, Renaud F5ZR via groups.io wrote:
Lovely story Tom! My question would be how does one recover the shape of the medal from the aqua regia? By asking politely?
Renaud

Re: Anyone with a 3586B A80 board?

#143270

Thanks so very much to all who replied!? And Bob - thanks for having that option - I may still need to do that.? I was able to get a board on the way from Daniel Nelson - he found one that needs some work, but at least that's much more than what I have now.

This motherboard will definitely need some love, as it's pretty ate up with electrolyte in that edge where the A80 board lives.? The card-edge connector for the A80 is toast, and I wouldn't doubt if some of the other ones in that vicinity are bad as well.? I'll be removing the board and doing the standard scrub & soak in an acidic solution, followed by an alkaline bath, then rinsing with clean water.? I've had good luck cleaning things of this nature before by doing that, so hopefully this will work as well.

I'm sure I'll have some other questions along the way, but thank you all again who replied!

Re: Hp 8720ES firmware.

#143269

Hi,

Clip manual for 8753D is there, I don't know if this can help you.

/g/HP-Agilent-Keysight-equipment/files/All%20HP,%20Agilent%
20and%20Keysight%20instruments%20in%20folders%20by%20part%20numbers/8000%20t
o%208999/8753D%20Vector%20Network%20Analyzer%20%28VNA%29/Agilent_8753D_Netwo
rk_Analyzer%20CLIP%20%20Pn%2008753-90265.pdf 


Yves

Show quoted text

-----Message d'origine-----
De?: [email protected]
<[email protected]> De la part de Razvan Popescu via
groups.io
Envoyé?: 9 avril 2024 09:18
??: [email protected]
Objet?: Re: [HP-Agilent-Keysight-equipment] Hp 8720ES firmware.

There is no CLIP for any of the E or ES models as far as I know.
The only CLIP that was available was for 8753A/B which is too old to match
anything you have.

On 09/04/2024 14:33, Peter Hansen via groups.io wrote:
Do you have clip over the CPU card ?
best regards Peter

Re: Hp 8720ES firmware.

#143268

There is no CLIP for any of the E or ES models as far as I know.
The only CLIP that was available was for 8753A/B which is too old to
match anything you have.

Show quoted text

On 09/04/2024 14:33, Peter Hansen via groups.io wrote:
Do you have clip over the CPU card ?
best regards Peter

Re: Agilent 54622D with broken digital inputs - Fixable?

#143267

If you go to the website for the nobel prize organization:
<>

The whole story is laid out.

-Chuck Harris

On Tue, 09 Apr 2024 01:31:30 -0700 "Renaud F5ZR via groups.io"
<renaud.richard@...> wrote:
Lovely story Tom! My question would be how does one recover the shape
of the medal from the aqua regia? By asking politely? Renaud

Re: Hp 8720ES firmware.

#143266

开云体育

Do you have clip over the CPU card ?

best regards Peter

Fra: [email protected] <[email protected]> p? vegne af Razvan Popescu via groups.io <yo8ryr@...>
Sendt: 9. april 2024 14:00
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] Hp 8720ES firmware.

?

I don't know about where this info is written. Could be also on the
Intel flash or on the PLCC ICs which are on the same board.

U201 and U205 are related to DSP firmware.

If the original CPU board doesn't boot fully it can also be the SRAM ICs
that failed. They are tested during power on and if there is a fail the
CPU board is stuck in a loop. I saw some 8753ES CPU boards on eBay with
those SRAM chips failed.

You have to check with a logic analyzer U102, U106, U111 and U117.

On 09/04/2024 12:06, Peter Hansen via groups.io wrote:
> hello I have the 08753-60272 CPU in the 8720ES it is strange it boots
> partly but not the instrument part. But buttons work and it writes
> 8720on the screen. Where is the difference stored if it should be a 8720
> or 8753 system. you know a setting where it can be changed ?
> best regards Peter

Re: Hp 8720ES firmware.

#143265

I don't know about where this info is written. Could be also on the
Intel flash or on the PLCC ICs which are on the same board.

U201 and U205 are related to DSP firmware.

If the original CPU board doesn't boot fully it can also be the SRAM ICs
that failed. They are tested during power on and if there is a fail the
CPU board is stuck in a loop. I saw some 8753ES CPU boards on eBay with
those SRAM chips failed.

You have to check with a logic analyzer U102, U106, U111 and U117.

Show quoted text

On 09/04/2024 12:06, Peter Hansen via groups.io wrote:
hello I have the 08753-60272 CPU in the 8720ES it is strange it boots
partly but not the instrument part. But buttons work and it writes
8720on the screen. Where is the difference stored if it should be a 8720
or 8753 system. you know a setting where it can be changed ?
best regards Peter

Re: Hp 8720ES firmware.

#143264

开云体育

hello I have the 08753-60272 CPU in the 8720ES it is strange it boots partly but not the instrument part. But buttons work and it writes 8720on the screen. Where is the difference stored if it should be a 8720 or 8753 system. you know a setting where it can be changed ?

best regards Peter

Fra: [email protected] <[email protected]> p? vegne af Razvan Popescu via groups.io <yo8ryr@...>
Sendt: 9. april 2024 11:28
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] Hp 8720ES firmware.

?

From what I know the hardware from 8753E is close or the same as 8702E.
The 8720ES has different hardware. Some parts might be the same but
there are some differences.

The CPU card of the 8720ES I know it is the same as 8753ES and even the
part number of the board is 08753-60272.

I suppose the firmware is stored in the 2x 8Mbit Intel E28F800 flash
memory ICs near the Motorola CPU.

Razvan

On 09/04/2024 10:39, Peter Hansen via groups.io wrote:
> Hello Razvan thanks for mail. I wonder if the CPU card from a 8753E or
> 8753ES with same number will work if the correct firmware is downloaded.
> I have one 8720ES that does not boot fully. If adding a 8753E CPU board
> it boots but as 8753E that will not work of course to do different HW,
> best regards Peter

Re: Hp 8720ES firmware.

#143263

From what I know the hardware from 8753E is close or the same as 8702E.
The 8720ES has different hardware. Some parts might be the same but
there are some differences.

The CPU card of the 8720ES I know it is the same as 8753ES and even the
part number of the board is 08753-60272.

I suppose the firmware is stored in the 2x 8Mbit Intel E28F800 flash
memory ICs near the Motorola CPU.

Razvan

Show quoted text

On 09/04/2024 10:39, Peter Hansen via groups.io wrote:
Hello Razvan thanks for mail. I wonder if the CPU card from a 8753E or
8753ES with same number will work if the correct firmware is downloaded.
I have one 8720ES that does not boot fully. If adding a 8753E CPU board
it boots but as 8753E that will not work of course to do different HW,
best regards Peter

Re: Hp 8720ES firmware.

#143262

开云体育

Hello Razvan thanks for mail. I wonder if the CPU card from a 8753E or 8753ES with same number will work if the correct firmware is downloaded. I have one 8720ES that does not boot fully. If adding a 8753E CPU board it boots but as 8753E that will not work of course to do different HW,

best regards Peter

Fra: [email protected] <[email protected]> p? vegne af Razvan Popescu via groups.io <yo8ryr@...>
Sendt: 9. april 2024 10:26
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] Hp 8720ES firmware.

?

Hello Peter,

Firmware is updated from floppy disks and you need to use an old machine
with Windows XP to create the disks.

73!
Razvan

On 08/04/2024 23:58, Peter Hansen via groups.io wrote:
> I am working on a Hp 8720ES tha does not startup fully so it could be
> the firmware that is corrupt. It is the newer Board. I do not see any
> Eprom with labels on. Does anyone have Firmware and maybe how to
> download it to the board.? I know there is a Windows based version on
> agilents homepage. But seem not to work.
> and help is much apriciated.
> 73 Peter
>

Re: Agilent 54622D with broken digital inputs - Fixable?

#143261

Lovely story Tom! My question would be how does one recover the shape of the medal from the aqua regia? By asking politely?
Renaud

Re: Hp 8720ES firmware.

#143260

Hello Peter,

Firmware is updated from floppy disks and you need to use an old machine
with Windows XP to create the disks.

73!
Razvan

Show quoted text

On 08/04/2024 23:58, Peter Hansen via groups.io wrote:
I am working on a Hp 8720ES tha does not startup fully so it could be
the firmware that is corrupt. It is the newer Board. I do not see any
Eprom with labels on. Does anyone have Firmware and maybe how to
download it to the board.? I know there is a Windows based version on
agilents homepage. But seem not to work.
and help is much apriciated.
73 Peter

Re: HP6643A - Blows Fuse When Activated

#143259

The manual may tell you what sort of power it would normaly draw when powered, but in standby/disabled, use that as a guide.

Dave 'KBV

Re: HP6643A - Blows Fuse When Activated

#143258

Links between (for example) output and remote sensing, or external/internal control terminals.

Though most 'modern' supplies with remote sensing facilities are safe without them, sometimes the internal "safety" resistors between the output and sense lines get damaged if at sometime it was miswired, and powered up, or something else has? happened downstream.

If it can't sense its own output, the output could then go to "an unregulated Maximim", triping an over voltage crowbar protection scheme, causing a fuse to blow, to prevent internal damage..

Similar behaviour can happen, if the series pass regulating power devices (linear or SMPS types) or control circuitry is damaged. (Failed short cct.)

73.? Dave'KBV.

Re: HP6643A - Blows Fuse When Activated

#143257

Will do.? Thanks for the offer, I plan to take you up on it.

Show quoted text

On Mon, Apr 8, 2024 at 4:43?PM Peter Gottlieb <hpnpilot@...> wrote:

Try starting with a 60 Watt incandescent.?

If you need help troubleshooting the supply I would be happy to assist.?

Peter

On Apr 8, 2024, at 7:33?PM, Michael Yellin <michaelhq54@...> wrote:

?
Peter,

This idea "You could wire an incandescent bulb in place of the fuse so you don't keep blowing them.? Find a wattage that will allow the supply to boot, but then light
up when the short occurs" is very interesting.? How can I choose the appropriate wattage of light???

Thanks,
Michael

On Sat, Apr 6, 2024 at 7:05?PM Peter Gottlieb <hpnpilot@...> wrote:
Could be a lot of things.? The manual is available on the web.? At quick glance
it seems when the supply is "on" before being enabled, the main transformer and
rectifiers are live.? You can verify by measuring at the main electrolytics.

My guess is something is wrong with the pass elements and the supply crowbars
but doesn't limit current and the fuse takes over.? You may be able to max out
the crowbar OVP limit and not blow the fuse but that won't solve the problem.

You could wire an incandescent bulb in place of the fuse so you don't keep
blowing them.? Find a wattage that will allow the supply to boot, but then light
up when the short occurs.

Peter

On 4/6/2024 9:48 PM, Harvey White wrote:
> if the fuse blows when activated, then something downstream of the fuse, (once
> activated) is likely a short.? Assuming that the high amperage fuse blows
> roughly as fast as the low amperage fuse (don't try to measure it......) then
> you're likely looking at a dead short downstream of the fuse.
>
> Harvey
>
> On 4/6/2024 7:18 PM, Michael Yellin wrote:
>> Mates,
>>
>> Recently acquired an HP 6643A.? When the unit is plugged in and turned on, it
>> boots, and seems fine.? However, as soon as the unit is "activated" to
>> generate voltage and amperage, the glass fuse blows.? I don't have an endless
>> supply of fuses, but I have tried some very low and very high voltage and
>> amperage settings, but that made no difference (I didn't think it would, but
>> well, it made me feel better to try)? Opened her up, looked around, and
>> everything appears fine, no burnt parts, no bulging caps, no melted wires,
>> and nothing obviously shorted.? Anyone have any ideas what could be wrong, or
>> can send me down a path to try and resurrect the thing.
>>
>> TIA
>> Michael
>>
>
>
>
>
>
>

Re: HP6643A - Blows Fuse When Activated

#143256

I'll confirm, thanks

Show quoted text

On Mon, Apr 8, 2024 at 5:43?PM Steve - Home <sw.krull@...> wrote:

I think what he means is make sure that +Sense is tied to +Out, -Sense is tied to -Out. If the input voltage is selectable for 110 or 220 make sure it matches your line voltage

On Apr 8, 2024, at 6:28?PM, Michael Yellin <michaelhq54@...> wrote:

?
It is, but only if it works :)

What do you mean by the "strapping?"

Thanks,
Michael

On Sun, Apr 7, 2024 at 3:50?PM Don Bitters via <donbitters=[email protected]> wrote:
Do check the rear panel strapping!? It is a nice power supply!
Don Bitters

Agilent Sig gen E4421B - How to interpret the part/serial numbers - ie for E4421B - just for interest really

#143255

Specifically the installed? RF board numbering.?
ie In the E4421B signal? generator there is a reference? module. Its number is E4400-60010-09-01-0015-06941
Obvious is the E4400 series, with a board type 60010 (as? referenced in the manual and circuit information, but I can only? guess at the rest.
My guess? is
Year 1999?
Month 01 or production line 01
batch 0015 or week 0015
and remaining digits are? the serialised unit production number.??
Close????

Just for interest to compare the other module I purchased and is working well, and what appears to me, to be a later manufacture date or run. Also the Crystal unit has a later serial number by about 400 units. These may be in time, close together? or some longer time apart. Cant stop asking, even at this grand age, why is it so??
thanks.

Re: HP6643A - Blows Fuse When Activated

#143254

开云体育

I think what he means is make sure that +Sense is tied to +Out, -Sense is tied to -Out. If the input voltage is selectable for 110 or 220 make sure it matches your line voltage

Show quoted text

On Apr 8, 2024, at 6:28?PM, Michael Yellin <michaelhq54@...> wrote:

?
It is, but only if it works :)

What do you mean by the "strapping?"

Thanks,
Michael

On Sun, Apr 7, 2024 at 3:50?PM Don Bitters via <donbitters=[email protected]> wrote:
Do check the rear panel strapping!? It is a nice power supply!
Don Bitters

Re: HP6643A - Blows Fuse When Activated

#143253

开云体育

Try starting with a 60 Watt incandescent.?

If you need help troubleshooting the supply I would be happy to assist.?

Peter

Show quoted text

On Apr 8, 2024, at 7:33?PM, Michael Yellin <michaelhq54@...> wrote:

?
Peter,

This idea "You could wire an incandescent bulb in place of the fuse so you don't keep blowing them.? Find a wattage that will allow the supply to boot, but then light
up when the short occurs" is very interesting.? How can I choose the appropriate wattage of light???

Thanks,
Michael

On Sat, Apr 6, 2024 at 7:05?PM Peter Gottlieb <hpnpilot@...> wrote:
Could be a lot of things.? The manual is available on the web.? At quick glance
it seems when the supply is "on" before being enabled, the main transformer and
rectifiers are live.? You can verify by measuring at the main electrolytics.

My guess is something is wrong with the pass elements and the supply crowbars
but doesn't limit current and the fuse takes over.? You may be able to max out
the crowbar OVP limit and not blow the fuse but that won't solve the problem.

You could wire an incandescent bulb in place of the fuse so you don't keep
blowing them.? Find a wattage that will allow the supply to boot, but then light
up when the short occurs.

Peter

On 4/6/2024 9:48 PM, Harvey White wrote:
> if the fuse blows when activated, then something downstream of the fuse, (once
> activated) is likely a short.? Assuming that the high amperage fuse blows
> roughly as fast as the low amperage fuse (don't try to measure it......) then
> you're likely looking at a dead short downstream of the fuse.
>
> Harvey
>
> On 4/6/2024 7:18 PM, Michael Yellin wrote:
>> Mates,
>>
>> Recently acquired an HP 6643A.? When the unit is plugged in and turned on, it
>> boots, and seems fine.? However, as soon as the unit is "activated" to
>> generate voltage and amperage, the glass fuse blows.? I don't have an endless
>> supply of fuses, but I have tried some very low and very high voltage and
>> amperage settings, but that made no difference (I didn't think it would, but
>> well, it made me feel better to try)? Opened her up, looked around, and
>> everything appears fine, no burnt parts, no bulging caps, no melted wires,
>> and nothing obviously shorted.? Anyone have any ideas what could be wrong, or
>> can send me down a path to try and resurrect the thing.
>>
>> TIA
>> Michael
>>
>
>
>
>
>
>

Re: HP6643A - Blows Fuse When Activated

#143252

Peter,

This idea "You could wire an incandescent bulb in place of the fuse so you don't keep blowing them.? Find a wattage that will allow the supply to boot, but then light

up when the short occurs" is very interesting.? How can I choose the appropriate wattage of light???

Thanks,

Michael

Show quoted text

On Sat, Apr 6, 2024 at 7:05?PM Peter Gottlieb <hpnpilot@...> wrote:

Could be a lot of things.? The manual is available on the web.? At quick glance
it seems when the supply is "on" before being enabled, the main transformer and
rectifiers are live.? You can verify by measuring at the main electrolytics.

My guess is something is wrong with the pass elements and the supply crowbars
but doesn't limit current and the fuse takes over.? You may be able to max out
the crowbar OVP limit and not blow the fuse but that won't solve the problem.

You could wire an incandescent bulb in place of the fuse so you don't keep
blowing them.? Find a wattage that will allow the supply to boot, but then light
up when the short occurs.

Peter

On 4/6/2024 9:48 PM, Harvey White wrote:
> if the fuse blows when activated, then something downstream of the fuse, (once
> activated) is likely a short.? Assuming that the high amperage fuse blows
> roughly as fast as the low amperage fuse (don't try to measure it......) then
> you're likely looking at a dead short downstream of the fuse.
>
> Harvey
>
> On 4/6/2024 7:18 PM, Michael Yellin wrote:
>> Mates,
>>
>> Recently acquired an HP 6643A.? When the unit is plugged in and turned on, it
>> boots, and seems fine.? However, as soon as the unit is "activated" to
>> generate voltage and amperage, the glass fuse blows.? I don't have an endless
>> supply of fuses, but I have tried some very low and very high voltage and
>> amperage settings, but that made no difference (I didn't think it would, but
>> well, it made me feel better to try)? Opened her up, looked around, and
>> everything appears fine, no burnt parts, no bulging caps, no melted wires,
>> and nothing obviously shorted.? Anyone have any ideas what could be wrong, or
>> can send me down a path to try and resurrect the thing.
>>
>> TIA
>> Michael
>>
>
>
>
>
>
>