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APC SURT2000XLI not working..Need Diagram or Picture...

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Chalani_apc
Crewman Chalani_apc
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Posted: ‎2021-06-30 11:57 PM

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Posted: ‎2021-06-30 11:57 PM

APC SURT2000XLI not working..Need Diagram or Picture...

This was originally posted on APC forums on 3/26/2015


Hi, I have APC SURT2000XLI which is not working.I gave it to an Electrician to find the fault. Due to burn, some resistors are hard to identify.

Please send me a schematic diagram or close up picture of this area, if any one have this UPS. It will be a great help to repair the UPS.

I have attached the picture.

Thank you

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anilkakkat_apc
Crewman anilkakkat_apc
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Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 4/24/2017


hai  resister picture i attached here 

See Answer In Context

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BillP
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Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This reply was originally posted by Angela on APC forums on 3/26/2015


Hi,

APC does not provide schematics as they are proprietary. If anyone else would like to assist at their and your own risk, they certainly can. APC's recommendation would be to bring it to a local service center which if authorized by APC, would have access to schematics, etc. I am not sure if this is repairable or not but it is not something that is end user serviceable.

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Chalani_apc
Crewman Chalani_apc
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Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 3/27/2015


Dear Angela,

I can Understand.Is there a service provider in Sri Lanka? I couldn't find any. I gave it to a qualified Technician. If you could asiste me by sending a picture, i could rather try,without doing nothing. Its a good UPS and i don't want to give up. Please help me.

Thank you.

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Chalani_apc
Crewman Chalani_apc
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Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 3/27/2015


Hi Anjela,

If you could tell me the Values of resistors R133 and R134, then i our technician could proceed.

Highly appreciate your positive response.Thank you.

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BillP
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Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This reply was originally posted by Angela on APC forums on 3/27/2015


Hi,

Even if I wanted to, I don't have this information and I do not have this UPS to look at because I am based in North America. Either way, this is just not something we'd provide to end users, at least in my region. If anything, your local technical support may have more information, at least on a service partner available in your area. I don't think they'd really share this information either due to liability reasons but I can't say for sure.

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upsit_apc
Ensign upsit_apc
Ensign

Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 3/30/2015


Please, dont fight the wind mills, you wont get an official shematic, so you are on your own  🙂

there is solution how to identify the resistor;

take some  needle and Ohm meter, remove the rest of top coat on resistor and find where is the burned spot....now, one probe put on one side of resistor and other probe connect with needle so you get the sharp point probe....so, using needle start stabbing around burned spot till you find the connection and then read the resistance....now, do the same on opposite side of resistor....

   unknown resistor

1----///x//////----2

(X - broken spot on burned resistor)

so, for example, if you measure like 3kR on one side (1 to x) and on other(2 to x) side 6.5kR.....sum it; 9.5kR.....so this is very probably 10kOhms resistor....

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Terry_Kennedy_apc
Commander Terry_Kennedy_apc
Commander

Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 3/30/2015


Regarding schematics, APC changes the internal design slightly (either to improve performance or aid in manufacturing) without changing the model number. Even if they did supply schematics, the schematic would only be for one particular production run and might not apply. Also, some components are specific to the particular unit and different values are inserted during manufacturing test. If you've ever been inside an APC UPS (and from your post, you definitely have) you'll see that there is writing (normally magic marker on the heat sinks) showing specific information on that unit's manufacturing, along with the date. That is also the reason you can't expect to replace just one of the circuit boards with one from a similar unit and have things work properly. It might work some of the time, or even most of the time, but the risk isn't worth it to many people.

When a component on a board burns like this, it is often due to a problem elsewhere in the unit. Unless a component was defective or under-specified, it is as sturdy as it needs to be for the operation of the UPS (after all, we can assume APC designs these things so they don't come back for warranty repairs due to design issues). Simply changing the component with the obvious failure may not fix the underlying problem.

By the way, I don't work for APC - I just maintain and repair equipment for my company.

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Chalani_apc
Crewman Chalani_apc
Crewman

Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 3/31/2015


Hi Vlad,

Thank you for the instructions.I will ask my technician to try it.Is there a problem for Computers or machines using via UPS if the resister values get bit different?

I mean, when i said the instructions you gave to my technician, he said,he's bit reluctant to do that because we rae plugging Computers and it will not work if the correct Htz didn't came out from the UPS.Please advise.

Thank you

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Chalani_apc
Crewman Chalani_apc
Crewman

Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 3/31/2015


Hi Terry,

Yes we replaced other parts, but we couldn't find these two resisters to replace.That's why i looked for help.

Thank you for your reply.

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upsit_apc
Ensign upsit_apc
Ensign

Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 3/31/2015


On 3/31/2015 12:15 AM, Terry said:

When a component on a board burns like this, it is often due to a problem elsewhere in the unit.

this is absolutely correct!!!!!

resistors are NEVER a cause of problem, they are just a consequence of some other malfunctioning part that causes increase of voltage and lineary increasement of current through the resistor which finally burns....

anyway, i hope a service guy is aware of that in this case and my post was only refer about "how to identify unknown burned resistor"

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upsit_apc
Ensign upsit_apc
Ensign

Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 3/31/2015


On 3/31/2015 6:26 AM, Chalani said:

Is there a problem for Computers or machines using via UPS if the resister values get bit different?

not at all!!!!!!

most of resistor are designed and marked with 1...2..5...even 10% of possible tolerance for mistake of value....so, in case you need a 20kR....you can, in most cases put any in spectrum of 18 to 22kR and it wont change performance.....

unless it is about voltage/frequency/current regulator so it might have slight bias then wanted (but then you can put the trim-pot and adjust till wanted value, then measure the resistance of trim-pot and replace with solid, discrete fixed value resistor)....but i suggest to identify by the way i told you and put the resistor as close as possible to the value you found by measuring.....turn it on and test the UPS....check the voltages, frequency of output....if it is in tolerance.....sleep tight and just run your PCs with no worries about UPS.....finally, every single PC is working with the SMPS principle of power supply....so, for those power supplies to work smoothly isnt any problem if the input voltage is 200 or 250VAC and few Hz more or less....because the PWM modulator will do his "homework"...

in worse case the new resistor you put will burn like the one you have now...so you have nothing to lose except one small resistor that is almost worthless 🙂

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anilkakkat_apc
Crewman anilkakkat_apc
Crewman

Posted: ‎2021-06-30 11:58 PM

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Posted: ‎2021-06-30 11:58 PM

This was originally posted on APC forums on 4/24/2017


hai  resister picture i attached here 

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