Author Topic: $50 For Schematic of HP 4338B Milliohmmeter!  (Read 1134 times)

0 Members and 1 Guest are viewing this topic.

Offline Hugoneus

  • Frequent Contributor
  • **
  • Posts: 876
  • Country: us
    • The Signal Path Video Blog
$50 For Schematic of HP 4338B Milliohmmeter!
« on: July 29, 2018, 06:25:16 pm »
I am working on the repair video of this unit and it is driving me crazy without the schematics.

If anyone has it, I would be happy to pay you $50 for it.

Please let me know!
Shahriar Shahramian
The Signal Path Video Blog
www.TheSignalPath.com
 

Offline Hugoneus

  • Frequent Contributor
  • **
  • Posts: 876
  • Country: us
    • The Signal Path Video Blog
Re: $50 For Schematic of HP 4338B Milliohmmeter!
« Reply #1 on: July 29, 2018, 08:13:48 pm »
The full datasheet of the AK9201A-VP would also help a lot...
Shahriar Shahramian
The Signal Path Video Blog
www.TheSignalPath.com
 

Offline Hydron

  • Frequent Contributor
  • **
  • Posts: 418
  • Country: gb
Re: $50 For Schematic of HP 4338B Milliohmmeter!
« Reply #2 on: July 29, 2018, 08:41:11 pm »
If it helps to see the AK9201A-VP as used in a circuit, it seems that Roland used them in some synths, which _do_ have schematics available:
http://www.synfo.nl/servicemanuals/Roland/DJ-70_SERVICE_NOTES.pdf
http://www.polynominal.com/Roland-dj70/roland-dj70-kasei-9201A.jpg
Other than that I can't help sorry, though I do feel your pain regarding unobtanium service info.
 

Offline _Wim_

  • Frequent Contributor
  • **
  • Posts: 772
  • Country: be
Re: $50 For Schematic of HP 4338B Milliohmmeter!
« Reply #3 on: July 29, 2018, 09:07:11 pm »
Here is the service manual. No schematics however. Looking forward to your video...
 

Offline Hugoneus

  • Frequent Contributor
  • **
  • Posts: 876
  • Country: us
    • The Signal Path Video Blog
Re: $50 For Schematic of HP 4338B Milliohmmeter!
« Reply #4 on: July 29, 2018, 10:20:40 pm »
If it helps to see the AK9201A-VP as used in a circuit, it seems that Roland used them in some synths, which _do_ have schematics available:
http://www.synfo.nl/servicemanuals/Roland/DJ-70_SERVICE_NOTES.pdf
http://www.polynominal.com/Roland-dj70/roland-dj70-kasei-9201A.jpg
Other than that I can't help sorry, though I do feel your pain regarding unobtanium service info.

Thanks. I had found those ones and were using them as a reference. But the HP unit seems to use this ADC differently... Or I am not able to catch all the traces on the PCB.

Still a mystery...
Shahriar Shahramian
The Signal Path Video Blog
www.TheSignalPath.com
 

Online Shock

  • Super Contributor
  • ***
  • Posts: 2998
  • Country: au
Re: $50 For Schematic of HP 4338B Milliohmmeter!
« Reply #5 on: August 01, 2018, 11:37:04 am »
Aside from contacting someone in the know at Keysight, perhaps also try in the Yahoo HP/Agilent Test Euipment group, or perhaps the manual exchange group.

https://groups.yahoo.com/neo/groups/hp_agilent_equipment/info
https://groups.yahoo.com/neo/groups/Manual_Exchange/info
Soldering/Rework: Pace ADS200, Pace MBT350
Multimeters: Fluke 87V, 117, 27/FM     >>> Fluke 51/52 Thermometer Parts Required <<<
Oscilloscopes: Rigol DS1054Z, Phillips PM3065
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf