Datron 4000A Questions

[Johnny10]

The remote signifier goes on and off in the Mode window.

Thanks for the offer Manatee Mafia.
If I can't find problem maybe I should just replace keyboard drive board?
And maybe a couple of new output posts to replace my broken one.

If I keep this unit the Operating and Service manual would come in handy.
The service manuals don't seem to exist for sale.

Bottom Pic of -1.000000vdc after HP 3457A Warm for 8 hours

[bbford352]

Hi Manatee
I a repair tech for a calibration house in Florida I have a couple of 4000As on for repair but all I have a re the manuals for the 4708 (Paper) and 4700 (digital) any chance I could get a copy of the manual I have one that came back from a custome that is working great except for the 1A range is completely dead I have a pretty decent group of manuals if you want to swap or something. Have a good one

[ManateeMafia]

bbford352,

I have promised the manuals to another forum member but I intend on scanning them first. I will be uploading them for everyone to use for their repairs. I will try and get some done this weekend but if you need a certain section with schematics and/or description, let me know. I can always do that section first and add it to the finished job later.

[Ronsine]

Hi all,I have just bought a 4000A with a fail 6 message on the lh display.Did copies of the manuals get uploaded anywhere?
Thanks in advance
Ron

[Johnny10]

Fail 6 is Calibration

[Ronsine]

Thanks for that,does anyone have manuals for the 4000A available?Also have a Datron 4200A which I have had for some years but have never been able to find out the specs compared to the 4200.Anyone have any info on the 4200A specs?
Ron

[Ronsine]

Anyone out there willing to sell copies of the Datron 4000A manuals?

[serg-el]

http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=06_Misc_Test_Equipment/Datron/Datron_D4000A   

[Ronsine]

Hi Serg-el,
Yes found those but need a full set...Also have a fail 2 on the 4000A to diagnose.
Thanks

[Johnny10]

A couple of members here have 4000A units and the first action to take is change all the tantalum caps on the power supply boards and the DC board.
Examine the board closely for any burnt resistors.

I have found since I changed all tantalums even Fail 2 disappears.

xdevs has the Power Supply board on those schematics.

[Ronsine]

Thanks Johnny 10,
I have checked all the caps with a capacitance/esr meter and found no problems but will replace them anyway.
I know it is a problem on the Darton units and had a couple go up on smoke on my 1061 multimeter and the 4200A calibrator.
I have manuals for the 4200 and have been trying to find out the presumably better specs for the 4200A over the 4200 so far without success.
Have got the info from Xdevs to peruse.
Thanks again.