EEVblog Electronics Community Forum

Electronics => Repair => Topic started by: BloodyCactus on February 23, 2017, 01:57:26 pm

Title: Rigol DS2000 died
Post by: BloodyCactus on February 23, 2017, 01:57:26 pm
So my DS2000 died. POP, smelled something... very carefully looked over the psu + mainboard, nothing out of place, no burn marks etc.

the soft power switch cycles so its getting some juice. push it, stays solid, fan comes on.. but nothing else.

Im wondering if juice is making it through. I did some poking. In trying to find a dc gnd point I thought, hey start with the black wires on the big molex connector... they had continuity to the chassis.. I tested the -ve where the electrolytic caps are not populated they connect to ac earth too..

the dc fan in the psu chassis, its gnd seems not connected to anything I can find, its pulling 9v.

I wanted to try and test some voltages but without being able to find a gnd I didnt want to poke too much.

There is a big diode labeled "NFC36G B10100 KA" its a "Schottky Barrier Rectifier" its anode pin appears connected to earth too.

seems odd to me things are connected to earth, like the caps and stuff.

maybe I'm going down the wrong road with this. (all the damn elastomer stuff makes it hard to probe stuff).

Title: Re: Rigol DS2000 died
Post by: tautech on February 23, 2017, 02:13:22 pm
Shite, you are in a cactus bush.
PSU voltages, repeat PSU voltages first.
Is there a Service manual online for these, surely there must be......

Try this one:
http://www.eyou.com.au/upload_files/Rigol/DS2000%20Performance%20Verification%20Guide.pdf (http://www.eyou.com.au/upload_files/Rigol/DS2000%20Performance%20Verification%20Guide.pdf)
NBG

Maybe this:
http://guyygv14.consultantsite.info/rigol-ds-2000-service-manual.html (http://guyygv14.consultantsite.info/rigol-ds-2000-service-manual.html)
(not checked) .rar 256 Mb
Title: Re: Rigol DS2000 died
Post by: BloodyCactus on February 23, 2017, 02:21:34 pm
thanks, the download link seems a bit dodgy, didnt actually work for me (need some kind of special account).
Title: Re: Rigol DS2000 died
Post by: tautech on February 23, 2017, 02:28:24 pm
thanks, the download link seems a bit dodgy, didnt actually work for me (need some kind of special account).
Yep, more investigation shows it could well be dodgy.  :palm:
https://www.google.co.nz/search?q=gravenfun&rlz=1C1ASUM_enNZ497NZ497&oq=gravenfun&aqs=chrome..69i57j69i60&sourceid=chrome&ie=UTF-8 (https://www.google.co.nz/search?q=gravenfun&rlz=1C1ASUM_enNZ497NZ497&oq=gravenfun&aqs=chrome..69i57j69i60&sourceid=chrome&ie=UTF-8)

A manual will turn up, someone will have or find it.
Title: Re: Rigol DS2000 died
Post by: tautech on February 23, 2017, 02:41:30 pm
Here's a Torrent file if you are keen:
http://www.velikodvor.ru/rigol-ds2000-manual.html (http://www.velikodvor.ru/rigol-ds2000-manual.html)

Old thread:
http://www.eevblog.com/forum/testgear/rigol-service-manuals-where-to-find/ (http://www.eevblog.com/forum/testgear/rigol-service-manuals-where-to-find/)

Title: Re: Rigol DS2000 died
Post by: BloodyCactus on February 23, 2017, 11:40:58 pm
that thread was very interesting thanks!
Title: Re: Rigol DS2000 died
Post by: saturation on February 24, 2017, 01:47:02 am
Keep us posted on the repair.  How old was your unit?  Was it bought new?
Title: Re: Rigol DS2000 died
Post by: BloodyCactus on February 24, 2017, 04:36:48 am
yeah it was new, bought in june 2014..
Title: Re: Rigol DS2000 died
Post by: JFJ on February 24, 2017, 06:12:10 am
... bought in june 2014..

Is it still under warranty?

According to a Rigol MSO/DS2000A Series Datasheet (https://telonicinstruments.co.uk/rigol-uk/MSO-DS/Rigol%20MSO-DS2000A%20Series%20Digital%20Oscilloscopes%20Datasheet.pdf), the warranty period (in the UK) is 3-years:

(http://www.eevblog.com/forum/repair/rigol-ds2000-died/?action=dlattach;attach=294416)
Title: Re: Rigol DS2000 died
Post by: james_s on February 24, 2017, 06:15:57 am
If it was, it's probably not anymore after poking around inside it.

This sort of failure is usually fairly straightfoward though, once you figure out where the pop and smell came from you can work backwards from that.