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Schematic required for repair Powertech MP.3089

Need to identify burnt components in switch mode power supply

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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jitenok
  • 151 Answers

SOURCE: Logisys PS480D Power Supply is Dead

first of all you should check power cable of smps. if it is ok then you can check smps for ok or fault.Short green and black wire in main output connector(for motherboard).If fan dont moves then check primery rectifire(4 diodes),switching transistor and protestion transistor(on first heatsink),check fuse,ntc,capacitorin primary section. Hope this be of initial help/idea. Pls post back as requested, how things turned up or should you need additional information.
Good luck and kind regards.
Thank you for using FIXYA.

Posted on Mar 07, 2008

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DickCanFixIt
  • 948 Answers

SOURCE: I just need a schematic for the ATXpower250 power supply.

http://www.helpwithpcs.com/courses/power-supply-basics-inc-pinouts.htm#atx-psu-pinouts

Posted on Jan 20, 2009

  • 19 Answers

SOURCE: my power suplly is totally off and i need the

jst buy a new one at tigerdirect.com

Posted on Feb 21, 2009

lqv77
  • 6 Answers

SOURCE: i need datasheet for AT2005 IC

Datasheet here:

http://www.china-ate.com/PDF/IC/AT2005B.pdf

Posted on Sep 07, 2009

  • 1027 Answers

SOURCE: Need to know if

Don't know if it stands for anything, but the input voltage range is 100-240vac.

Posted on Mar 11, 2010

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1 Answer

Why wont tv turn on today worked fine yesterday? powers up but shuts right back off.


This is a general answer to your question:
Your TV is shutting down because it is consuming too much current from the internal power supply. The power supply has a protection cct
to protect your TV from further damage. If yo have any technical background, then you can follow these simple steps to troubleshoot your TV fault with the aid of a schematic diagram. Let us revise what you need for your job:
1- You need a schematic diagram for your TV model
2- You must be very careful when dealing with powered equippments
3- You need to prepare all the required tools to start your test and repair
4- You must be very confident that you are able to do the job using scientific steps. We all have done many mistakes but at the end we became experts in our fields. Please remember the fault is hidden somewhere and you are going to dig it out.

Let me start now:
-Disconnect any device connected to your TV
-Plug your TV to the Main
-Power on your TV, If the fault is still persisting then check the timer setting of your remote control or take the batteries out. Restart your TV again and if the same problem appear then we need to start our repair now. I personally advice you not to do any think if you don't know what you are doing, but if you want to learn, then do the followings without powering your TV.
- Disconnect your TV cable from the main
- Place and secure your TV on a clean wooden bench.
- Remove the back cover carefully
- look at the boards and identify which is which and compare it with the technical diagram of your TV.
- Identify the power supply section. Remember that 50 % of the TV faults are within the power supply and the rest lies in different area. Furthermore, many faults occurs due to bad soldering, sparks,loose connecters, metallic debris, excessive heat and bad ventilation.

Now if you have identified the power supply board(SMPS) which is very easy to find, disconnect the output jack and test each of the male and female jack pins with the ground. Use an AVO meter (put the selector to ohms) to check for any short cct with the ground. Remembr that there are some pins connect to the ground in both jacks. If you find any thing abnormal then compare your findings with the diagram. Alternatively, you can power your TV and measure the voltages at the output pins of the power supply and compare your readings with the service manual, but please be very careful. Again remember that switch mode power supplies (SMPS)
can work with a range of voltages 90VAC-240VAC, so if you have a step-down transformer from 220VAC to 110VAC, then it would be great and more safe when conducting your tests. In this test we can isolate the fault if it is in the power supply or in a different place. Also remember that your AVO (DC voltage) readings would appear higher than normal because we have isolated the load.

If the power supply was perfect then we are sure now that the problem is somewhere else, but in certain and limited cases some SMPS cannot provide the required power to the load due to internal changes and shifts in the values of the components in the loads and the power supply. In this case you need more experience to identify the source of the problem.

We have now finished from the power supply, however in the old TVs there is another power supply source which is the line transformer. This one is very simple and I am going to discuss that later.














Aug 15, 2014 | Televison & Video

1 Answer

My stereo keeps defaulting back to demo mode


You most likely have the 12 volt permanent connected to the switched supply lead you need to identify which wire requires the permanent and the wire that requires 12 volt switched this will only appear when you turn your car key to acc position , it's normally a yellow or orange wire your looking for but check your models schematic.

May 13, 2014 | JVC In-Dash AM/FM/CD Receiver with USB...

2 Answers

Peavey XR8600 can't get it to come apart


And why would equipment blow a fuse the minute you turn it on? Well, I would say because it's defective. Bad power supplies, burnt components, shorted diodes and/or transistors or dead IC's. It's repair shop time bud and make sure that shorted speaker wires or defective speakers didn't damage it, as reconnecting a freshly repaired unit to the same wires/speakers could damage the unit twice.

Apr 01, 2014 | Peavey Music

1 Answer

Power surge has blown components at input to the power supply unit SMPSU17. I need schematic to help identify the correct replacement components. John at Topaz Repair Limerick.


Behringer re-uses a lot of design... you might look at page 2 of this download:

http://elektrotanya.com/behringer_pmh100.pdf/download.html

Scroll down to "Get Manual" and click to download. On page 2 is the SPS400 power supply which is one of the smaller switching supplies they use. You may find the schematic is close, possibly they de-populate it as a smaller supply. When repaired, start the supply for testing with a 60 watt light bulb in series with the power input. Use an isolation transformer for troubleshooting for safety.

Apr 27, 2011 | Behringer Active 150Watt PAMonitor Speaker...

2 Answers

My Power Supply Burnt Out Can I Get It Repaired?


A power supply can't be repaired.The replacement cost is probably about what a repair would run anyway,or less.
Pick up a new one,and you also pick up a new warranty.
Good or bad,please rate my post?
Bob

Aug 11, 2010 | RaidMax RX-500S 500W ATX12V Power Supply

2 Answers

Does it have a fuse we got hit by lighting and now the Pc wont power up


To fix the problem, you need to disassemble the power supply, replace the burnt out fuse, & also check the bridge rectifier section for burnt out rectifying diodes (these usually get burnt out if the high current gets the chance to leak past the fuse, which could sometimes happen). If you find burnt out rectifying diodes, you will need to replace them as well, as they could burn out the fuse again when you try to use the power supply while they are still there.

Dec 20, 2009 | Codegen : 350W ATX Power Supply With 12cm...

1 Answer

The dishwasher will not turn on


Congratulations - you found the fault !

The options you have are -
Buy areplacement board from a spares centre.
Buy a take- off board from a scrap one on Ebay.
Or - Learn about electronic repair - and identify the burnt component , buy the parts and replace it yourself.

You can take it to an electronic repair shop - if you can find one - or a electronic supply shop - and ask for a new one of "them".

If replacing a burnt component - often there is a cause other than just that component.
Experience tells you what else might be wrong to cause it.

Aug 04, 2009 | Maytag MDB9600A Jetclean II Built-in...

1 Answer

Died - need to identify faulty component


http://www.electronica-pt.com/index.php/component/option,com_remository/Itemid,34/func,startdown/id,3023/

My brother is having same problem! I found the schematic! page 13 of 29 is showing location 7311. It shows that it is AN7522N. Hope this helps!

Apr 27, 2009 | Philips 17PF9945 17 in. LCD HDTV

1 Answer

Need schematic diagram, some advice and ultimately replacement parts


You have something in short circuit in power supply pattern, so filter coils are burnt. It may be voltage regulator, or regulating transistor, electrolytic capacitor or even shorted diode at pwr. input serving to protect in case of inverse polarity applied. Check all for short. Was it reverse polarity or overvoltage occured?

Mladen,
mladen@propilots.net

Mar 18, 2008 | Lowrance GPS

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