TEKTRONIX TDS 2014 broken pcb

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#1
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He there,

 

My TEKTRONIX TDS 2014 is broken and cannot measure anymore. TEKTRONIX service man wasn't helpfull with me and just wanted to sell me a new model.

 

So I decided to open the enclosure myself in order to search for the problem.

 

There is an ic on the measurement pcb board with the label : EE56ES 9857-00   that is very hot and I think that there is the malfunction.

 

My problem is that I cannot find anything about this ic.

 

Would you able to help me ?

 

Thanks in advance.

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Michael.

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Tek uses a host of proprietary ICs, both linear and digital. Chances of getting one are about as close to zero as one can get. HOWEVER, you should be able to get the circuit board. You may need to push the service guy pretty hard, but they should be available.

 

Jim (former Tek engineer)

 

Until Black Lives Matter, we do not have "All Lives Matter"!

 

 

Last Edited: Thu. Nov 17, 2016 - 06:40 AM
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Hi Jim,

 

Thanks for your fast and helpful reply. You said that you are a former Tek(tronix) engineer if I understand it well. Is there a person that you know and I could contact him in order to get the pcb ? I come from Greece/Europe.

 

The Tek authorized service didn't help me.

 

Thank you.

Michael.

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Last Edited: Thu. Nov 17, 2016 - 06:47 AM
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Based on previous posts regarding the cost of tek spares, it was more economical to purchase a rigol product.

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I already got a RIGOL too.  I was just wondering if I could make my Tek function agian

 

Michael.

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The power supply is about the only easily repaired item in the scope. So if it is a psu problem, you might be in luck - it will probably be a capacitor.
I'd suggest posting in eevblog

Last Edited: Thu. Nov 17, 2016 - 07:57 AM
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Tek TDS 2014 is a 4 channel osc. There are 2 ics with the label EE56ES 9857-00 on the pcb. Each pair of 2 channels is connected to an EE56ES 9857-00.

 

But only one of them become very hot after power on, even though none of the 4 channels functions.

 

That's why I thought that maybe the problem caused by this ic - maybe it's internal short circuit consumpts so much current making impossible for the second (EE56ES 9857-00) 2 channels to function. I really don't know (yet) about the power supply because I didn't measure it yet. But while this ic becomes very hot...it seems to me that there must be the malfunction.

 

Don't you agree ?

 

Michael.

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Last Edited: Thu. Nov 17, 2016 - 11:49 AM
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Been away from Tek for a long time. No remaining contacts, there.

 

Jim

 

Until Black Lives Matter, we do not have "All Lives Matter"!

 

 

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Never mind Jim.

 

Thank you anyway

 

Michael.

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Last Edited: Fri. Nov 18, 2016 - 06:47 AM
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I'm guessing here, but your hot IC might pull some power rails down.

So if your lucky you end up with a 2 channel scope if you remove it.

 

POST will probably detect it so you might get off  with a warning, but I think it's more like the scope would refuse to boot.

But what's to loose?

Doing magic with a USD 7 Logic Analyser: https://www.avrfreaks.net/comment/2421756#comment-2421756

Bunch of old projects with AVR's: http://www.hoevendesign.com

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icarus1 wrote:
That's why I thought that maybe the problem caused by this ic - ...
The troubleshooting tree is only 3 pages of flowcharts :

Tektronix

TDS1000 & TDS2000 Series Service Manual

http://www.tek.com/oscilloscope/tds1002-manual/tds1000-tds2000-series-service-manual

Ideally will be able to identify the malfunctioning replaceable part (likely a circuit board assembly) and the part's number is in the service manual.

(page 131)

Replacement parts are available through your local Tektronix field office or representative.

...

Module Servicing

(exchange, new)

...

All that may only result in a painful laugh frown

I've forgotten the name of the very popular (well, into the 1980s) US vendor of oscilloscope schematics.

Might have some more data once you have a module part number to search on.

TDS2014 is still in Tektronix's catalog; the schematics might not exist outside of Tektronix (sometime after EOL the technical data package and spares are sold)


http://www.tek.com/oscilloscope/tds2000-digital-storage-oscilloscope

 

"Dare to be naïve." - Buckminster Fuller

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Go to the TekScopes forum on Yahoo. If it's fixable, somebody over there will have the answer.

 

Last Edited: Sat. Nov 26, 2016 - 02:16 PM