Thursday, March 24, 2016

Circuit board troubleshooting using handheld digital multimeters

Printed circuit board assembly troubleshooting


The printed circuit board assembly (PCBA) can be found in almost any electronic devices. These electronic devices range from consumer electronics such as scanners, exercise devices, charging stations, computer accessories and modems to commercial electronics in the industrial and medical fields with stringent requirements. Testing is crucial to ensure the electronic devices operate normally. In most cases of electronic device failures, the root cause is determined to be the PCBA itself. 

This blog describes some common techniques used in circuit board troubleshooting.  Before proceeding with the troubleshooting task, it is important to identify the failure symptoms. The failure symptoms may provide information about the possible cause of defect.

Checking the power supply voltage to the circuit

Voltage measurement of the circuit board’s power supply is an important testing process because it is critical that a proper level of power is supplied to most of the integrated circuits (ICs). It is essential to check if the voltage level output from the power supply is within the acceptable limit to prevent overheating or overloading of the circuit board. Handheld digital multimeters with 4 ½ digit display resolution deliver the precision, accuracy and repeatability which is compatible with the basic bench multimeters, would be a good alternative for the technicians to use in troubleshooting.

Visual inspection to look for burned or damage parts

Visual inspection is a straight forward and effective method for troubleshooting. Components or parts such as transformers, power output transistors, resistors and capacitors that carry the burn mark can be detected easily using this method. The burned parts normally appear as brownish in color and can be easily detected visually through the naked eye or with the aid of a magnifying glass. Sometimes, the overheated components will form a brownish mark on the circuit board and produce a burnt scent.


Figure 1 Example of dry joints with obvious crack line (figure extracted from internet)

Solder joint is another common item inspected during the visual inspection to look for any dry joints.  Dry joint is a common symptom of a defective board due to soldering defects. Dry joint cause poor contact at the solder joint and affects the current conduction in the circuit.  A good solder joint normally looks smooth, bright and shiny. Dull surface suggests a weak joint.  Dry joint can be checked using a handheld digital multimeter. Resistance test or continuity check is performed from one pin to another pin to locate any dry joints or open traces on the circuit board.


Next posting will discuss methods to detect hotspot for potential failure. 

96 comments:

  1. You know your projects stand out of the herd. There is something special about them. It seems to me all of them are really brilliant! kansas city seo

    ReplyDelete
  2. Nice ideas you posted in this blog, thank you so much for sharing this valuable information.
    Digital Marketing Company Amravati

    ReplyDelete
  3. You describes some common techniques That is very useful.thanks for sharing.
    Engineering Assignment Help Online

    ReplyDelete
  4. Need Academic Writing Services? Hire EssayCorp for Availing the best online assignment help and academic writing services at an affordable price with 100% plagiarism free. For more information contact us at contact@essaycorp.com or whatsApp us on +1 (205) 7088703.



    Get python assignment help, accounting assignment help,Java Assignment help provided by best experts from EssayCorp.

    ReplyDelete
    Replies
    1. Dial our QuickBooks Payroll Support Phone Number 1-855-236-7529 to get answers for all the general queries and questions.
      For more information do connect with us at our:
      Website: https://www.techiesupportnumber.com/quickbooks-payroll/

      Delete


    2. QuickBooks Tech Support Phone Number +1-855-236-7529: A Key To Unlock Surplus Solutions.
      READMORE: https://www.techiesupportnumber.com/

      Delete
    3. Whenever you feel stuck while using these features, you can call on QuickBooks Phone Number +1-855-236-7529. The team will provide you with cohesive solutions for QuickBooks in no time.
      WEBSITE: https://www.techiesupportnumber.com/

      Delete
    4. What do you when you encounter any problem or bug that renders the software unresponsive or not working at all? What do you do when your QuickBooks software stops Working properly? Thus, in all such situations dial our QuickBooks Tech Support Phone Number +1-855-236-7529. Our team on the other hand consists of highly experienced individuals who are well versed with the functioning of QuickBooks software.
      Website: https://www.techiesupportnumber.com/

      Delete
    5. Are you here for some help with your QuickBooks software? Probably well, you are in the right place! Team at QuickBooks Tech Support Phone Number +1-855-236-7529 deals with all the issues of QuickBooks software. QuickBooks is a reliable accounting software which has attracted millions of customers in the world. Whenever you face any problem however it is big or small dial our QuickBooks Tech Support Phone Number +1-855-236-7529 and get instant help.
      Website: https://www.techiesupportnumber.com/

      Delete
    6. I am not that much of an online reader, but your site is really nice. Keep it up! I will bookmark your website for future update. You can even save your time by downloading QuickBooks accounting software. You can even call QuickBooks Error 6007 +1-855-236-7529 We are available 24 hours 365 days to help our clients in solving their problems. QuickBooks Payroll Support Number
      Read more: https://tinyurl.com/y5vlgag6
      Visit here: https://www.techiesupportnumber.com/quickbooks-payroll/

      Delete
  5. Replies
    1. Our team at +1-855-236-7529 QuickBooks Payroll Support Number looks after the issues very carefully that might show up at any point of time.
      Website: https://www.techiesupportnumber.com/quickbooks-payroll/

      Delete
  6. Dragon City Mod Apk

    This is very attention-grabbing, You’re an excessively skilled blogger.
    I’ve joined your rss feed and look ahead to seeking more of your excellent post.

    Howdy, i read your blog occasionally and i own a similar one and i was just wondering if
    you get a lot of spam responses? If so how do you stop
    it, any plugin or anything you can recommend? I get so much lately it’s driving me insane so any help is
    very much appreciated.

    Dragon City Mod Apk

    ReplyDelete

  7. This is my first blog site.this is very interesting site also. if you want to more love story ,please visit my website===>>>
    "Exceptional Story"
    This is very romantic Love Story.If you read this story once, you say this again and again...

    ReplyDelete
    Replies

    1. It’s time to cherish user-friendly accounting along with QuickBooks Contact Number +1-855-236-7529 – a one-stop solution for all QuickBooks queries.
      Website: https://www.techiesupportnumber.com/quickbooks-contact-number/

      Delete
  8. Virtual Reality-The team at Simulanis is led by Raman at the helm, who is a well decorated, top-rank holder and a multi-award winning Masters in Chemical Engineering with Honours in Research (MEng. Hons.) from the University of Manchester (UK). His core interests lie in the de¬velopment and application of process simulation and optimization models to solve real world problems, and since November 2013 has steered it to become one of the most innovative and powerful na¬tional award winning AR- Virtual Reality startup in India. Virtual Reality

    ReplyDelete
  9. great post. i like it. feeling great when reading your post .
    douchebag workout 2

    ReplyDelete
  10. Codetextpro Provides free Web tutorial, HTML, CSS, C, C++, Java, JavaScript, PHP, MySql, Python, Program, Programming Notes, Programming Questions and more.
    Click here to visit Codetextpro

    ReplyDelete
  11. Replies
    1. Even after all these advantages, some problems do exist in QuickBooks. These problems are solved within no time at +1 855-236-7529 by our QuickBooks POS Support team.
      WEBSITE: https://www.techiesupportnumber.com/quickbooks-pos/

      Delete
  12. That was a great blog. thank you for such information
    keep posting.
    website designing company in chennai

    ReplyDelete
  13. the post looks so genuine, keep posting more and all the best for future posts.
    Office name board in Chennai
    Acp signage in Chennai

    ReplyDelete
    Replies
    1. Seek quick assistance on QuickBooks Customer Support Number +1-855-236-7529 in case you deal with any technical errors with QuickBooks. The customer support team on this platform will never let go with empty hands. It doesn’t matter how complicated the snags are; our QuickBooks technicians are all-time ready to deliver power-packed solutions in the fastest turnaround time. Consequently, you can run your accounting software in a way as you were doing before getting the technical hiccups.
      Website: https://www.techiesupportnumber.com/quickbooks-customer-support-number/

      Delete
  14. This blog is a fascinating one and it induces me to know more about it. Thanks for the sharing.
    SS Letters In Chennai
    Office Internal Signage in Chennai

    ReplyDelete
  15. This is very attention-grabbing, You’re an excessively skilled blogger.
    I’ve joined your rss feed and look ahead to seeking more of your excellent post.
    Plastic Enclosure Design
    Sheet Metal Enclosure Design

    ReplyDelete

  16. Call us anytime at our QuickBooks Support 1-855-236-7529 to keep running this software without any hinderance. Our technicians will provide you help for:
    • Installation of QuickBooks software.x
    • How to view reports in QuickBooks software.
    • Data related queries.
    • Contact Us:
    • For more information feel free to contact us at our:
    • Website: https://www.techiesupportnumber.com/quickbooks-support/

    ReplyDelete
  17. Dr Smilez is one of the best dental clinic in Chennai, and provides the best treatment for all dental related problems
    Braces in Chennai
    Dental Implant cost in Chennai
    How to avoid root canal naturally

    ReplyDelete
  18. I am overwhelmed by your post with such a charming subject. For the most part I visit your destinations and get revived through the information you fuse yet the present blog would be the most measurable. Well done!

    custom stickers printing

    ReplyDelete
  19. Wow nice article keep share with us..
    Check also my post:-
    https://howfoodrecipes.com/rumble-stars-football-hack-apk/

    ReplyDelete
  20. I'm really impressed about the info you provide in your articles. If you want to invest in suits and be stress-free, then you should shake hands with us. We are providing great clothing in the most reasonable price range that you wouldn’t find anywhere else. Put your trust in us as your supplier since we are the prominent custom stickers printing You can rely on us for the clothing problems we assure you we will never let our customers down.

    ReplyDelete
  21. Amazing Post, Thank you for sharing this post really this is awesome and very useful.
    Custom Boxes

    ReplyDelete
  22. Wonderful article! That is the kind of info that are supposed to be shared across the net. Disgrace on the search engines for not positioning this publish upper! Come on over and seek advice from my website. Thanks =)
    Custom Packaging Boxes

    ReplyDelete
  23. Wonderful article! That is the kind of info that are supposed to be shared across the net. Disgrace on the search engines for not positioning this publish upper! Come on over and seek advice from my website. Thanks =)
    soap boxes

    ReplyDelete
  24. Hello, I want to subscribe for this web site to take most up-to-date updates, thus where can i do it please help out.
    candle boxes

    ReplyDelete
  25. Hello, I want to subscribe for this web site to take most up-to-date updates, thus where can i do it please help out.
    cosmetic box

    ReplyDelete
  26. We provide 24*7 support for the errors in QuickBooks and our matchless services can define what is QuickBooks support phone number 800

    Visit here : https://tinyurl.com/yxszdrd6

    ReplyDelete
  27. I am completely agree with you, I am an amazing fan of your site, genuine guard post Keep making such stunning post,


    Thanks for sharing.



    Jaipur Sightseeing Taxi



    Regards

    Sameer

    ReplyDelete
  28. On this subject internet page, you'll see my best information, be sure to look over this level of detail fnaf

    ReplyDelete
  29. A Breast Pump is a Mechanical Device that Lactating Women use to Extract Milk from their Breast and Here are Some Benefits and Side Effects of it Read our How to use a Breast Pump

    ReplyDelete
  30. The article you have shared here very awesome
    Swords And Souls

    ReplyDelete
  31. wow, what an amazing blog I truly admire your way of writing and research good job
    https://whatsintrending.com/how-to-remove-pimples-4-natural-home-remedies/
    https://whatsintrending.com/how-to-get-fair-skin-in-just-1-week/
    https://whatsintrending.com/how-to-get-thicker-hair/
    https://whatsintrending.com/disadvantages-of-sugar/
    https://whatsintrending.com/how-to-cure-depression/
    https://whatsintrending.com/how-to-control-anger/
    https://whatsintrending.com/benefits-of-running/
    https://whatsintrending.com/

    ReplyDelete
  32. I am completely agree with you, I am an amazing fan of your site,

    genuine guard post Keep making such stunning post,


    Thanks for sharing.


    Taxi in Jaipur

     
    and
     

    Jaipur Sightseeing Taxi


     

    Regards

    Sameer

    ReplyDelete
  33. Thank you for detailed instructions on how to troubleshoot circuit board using handheld digital multimeters.
    dr driving

    ReplyDelete
  34. amazing article.
    Thanks for sharing with us.
    2D Cad LibraryCad Blocks, Autocad Blocks Furniture, Architecture-Interiors design-Construction floor plan and detail in autocad dwg format.

    ReplyDelete
  35. Attractive information on your blog, thank you for taking the time and share with us. Amazing insight you have on this, it’s nice to find a website the details so much information about different artists.
    business-cards-pro

    ReplyDelete
  36. Jobs divine is one of the best job consultancy in thrissur. We provide all types of jobs in thrissur. We do have many job vacancies in thrissur. Sign up now for a free account and get thrissur jobs instantly. The candidates who in search of good career in Thrissur can apply and get easily their dream job through jobs divine

    job consultancy in thrissur

    thrissur jobs

    top job placement agency in thrissur

    job vacancies at thrissur

    jobs at thrissur

    thrissur job vacancies

    ReplyDelete
  37. I was just browsing through the internet looking for some information and came across your blog. I am impressed by the information that you have on this blog. It shows how well you understand this subject. Bookmarked this page, will come back for more.
    top 7 best washing machine
    www.technewworld.in

    ReplyDelete
  38. QuickBooks Support Phone Number: 1-800-329-0391. By seeking help from our QuickBooks Support Phone Number team at 1-800-329-0391 you can get the best answers for all the problems in QuickBooks. This software provides you tools that are extremely beneficial for almost every industry type in the world.

    Visit here : https://www.qbsupportcustomerservice.com/quickbooks-support-phone-number/

    ReplyDelete
  39. Our well experience QuickBooks Customer Service executive are confident to assist you with the best of their abilities. So dial Our Quickbooks Customer Service Phone Number: 800-329-0391 We unravel the modern support techniques for you, keeping in mind the time constraint.We assist our customers with utmost sincerity thus making our assistance a perfect blend of excellence and hard work.

    Visit here : https://www.qbsupportcustomerservice.com/

    ReplyDelete
  40. I am really happy to say it’s an interesting post to read. Thanks for sharing

    jobs in thrissur

    ReplyDelete
  41. So Today we are here with the new and the latest version of Pokemon Go Mod Apk Fake Gps By which you can easily catch any pokemon in the game and you can also unlock the gyms without moving from one place to another and this will be really fun to play.

    Depending on the degree of Gun Shot Strike Mod Apk Unlimited Money on Apksetting has many mod apk, Free apk new games mod, free mod apk new mod apk and these mods are 100% free apk setting and AI, you will encounter a number of obstacles.

    ReplyDelete
  42. Present your products in the best quality custom printed boxes. Custom boxes make it easy to design and create beautiful custom printed boxes UK. Are you looking for Buy Packaging Boxes with Custom Packaging Boxes at wholesale prices? We offer a huge variety of custom packaging boxes at your doorstep with free shipping.
    Custom Boxes

    ReplyDelete
  43. StickerZone is the fastest and easiest way to buy custom sticker printing. Order in 60 seconds and we’ll turn your designs and illustrations into custom stickers UK, custom labels, window, magnets, buttons and packaging in days.
    Custom Stickers

    ReplyDelete
  44. Hello Everyone! I am not a regular online reader. I bumped into this article and found that your blog is very interesting to read. I read a few more blogs on your website. I really like your work. please keep up the effective work. you can save your valuable time by installing QuickBooks software. If you get stuck with any problems it is recommended to take help from their experts by dialling QuickBooks Tech Support Phone Number 1(855)-236-7529
    Read more: https://tinyurl.com/y3kahnzm
    Website: https://www.techiesupportnumber.com/

    ReplyDelete
  45. Hello everyone! I have read many blogs but haven’t read such a beautiful piece of work. Great post. Yes, one can boost the growth and productivity of their business by installing QuickBooks software. So do not waste your time and download QuickBooks accounting software now. If any nagging error arrives in your software then do not hessite to knock their door dial QuickBooks 2019 Support Phone Number 1(855)-236-7529 to get instant help and support.
    Read more: https://tinyurl.com/y5mw8pqr
    Website: https://www.techiesupportnumber.com/quickbooks-2019-support-phone-number/

    ReplyDelete
  46. Hello Everyone! I actually appreciate your content. This blog has genuinely peaks my interest and I am going to bookmark your website for future updates. QuickBooks POS software is very convenient to use. You can easily download and install QuickBooks POS software. You can even call their customer care executives at QuickBooks POS Support Phone Number 1(855)-236-7529. They are available 24*7 round the clock to sail you out of any QuickBooks POS problems.
    Read more: https://tinyurl.com/y2dg6bt4
    Website: https://www.techiesupportnumber.com/quickbooks-pos/

    ReplyDelete
  47. Hello everyone! I have a penchant for reading blogs. I have read many blogs earlier but haven’t read such an inspirational work earlier. Great work. yes, it is well said in this blog that one can save their time and resources by installing QuickBooks software. You can even call them at QuickBooks Payroll Support Number 1-855-236-7529 for more information.
    Read more: https://tinyurl.com/y2hwz69t
    Website: https://www.techiesupportnumber.com/quickbooks-payroll/

    ReplyDelete
  48. Hello everyone. I think this is the best platform to share my experience. I installed QuickBooks software and trust me on this, this software has lessened my burden for managing and organizing business tasks. Team at QuickBooks Desktop Support Phone Number 1-855-236-7529 handles all your queries without any hassle
    Read more: https://tinyurl.com/y24a2nmz
    Website: https://www.techiesupportnumber.com/quickbooks-desktop-support-phone-number/

    ReplyDelete
  49. Hello everyone. this site is very insightful and helped me understand so many things. Your tactics are great. Thanks for posting such an informative blog. QuickBooks is very useful accounting software. You can even call them at their QuickBooks Contact Number 1-855-236-7529. They are available 24*7 round the clock for you.
    Read more: https://tinyurl.com/yxa7o8ck
    Website: https://www.techiesupportnumber.com/quickbooks-contact-number/

    ReplyDelete
  50. I loved your blog.Really many thanks!Thanks-a-mundo for the article. Awesome.This is one great blog.Really getting excited about read more. Really Great.Thanks again for the article post.Thanks Again. Awesome.Thanks again for the content post.Thanks Again. Really Great.Enjoyed just of your article post.Really looking towards read more. Actually Cool.Major thanks for the website article.Really many thanks! Significantly obliged.

    Eyelash Extensions

    ReplyDelete
  51. Hey! I really like your work. I must admit that I bumped into a very brilliant piece of work. Your blog is really good. Thumbs up! QuickBooks is undoubtedly a great innovation of intuit. The user can easily use this software. The user can also contact their technical team by dialling QuickBooks Desktop Support 1-855-236-7529
    Red more: https://tinyurl.com/y24a2nmz
    Website: https://www.techiesupportnumber.com/quickbooks-desktop-support-phone-number/

    ReplyDelete
  52. Hello! This blog is really an awesome piece of work. I really like your write up. I totally agree with the fact that installing QuickBooks software is the best option for the growth of one’s business. For more information on QuickBooks you can dial their QuickBooks Tech Support 1-855-236-7529
    Red more: https://tinyurl.com/y2a5pucl
    Website: https://www.techiesupportnumber.com

    ReplyDelete
  53. Hey! I am not a regular online reader. But I really like your work. Your blog is really appreciable content given in this blog is completely informative. The user can download QuickBooks to save their time and resource. The user can also seek 24*7 help and support by dialling QuickBooks Payroll Support Number 1-855-236-7529
    Red more: https://tinyurl.com/y2hwz69t
    Website: https://www.techiesupportnumber.com/quickbooks-payroll/

    ReplyDelete
  54. Hey! I have read many blogs earlier but haven’t read such a beautiful post. I must admit that your work is really nice. Keep it up. Yes, it is well said in this blog that QuickBooks is very useful accounting software. The user can even get instant help and support at QuickBooks Contact 1-855-236-7529
    Red more: https://tinyurl.com/yxa7o8ck
    Website: https://www.techiesupportnumber.com/quickbooks-contact-number/

    ReplyDelete
  55. Hey! I really like your content. Your content is very informative and brilliant. I was searching for such type of blogs. I wish you could publish some more work on this topic. QuickBooks is very easy to use accounting software. All the errors related to QuickBooks can be easily resolved at QuickBooks Customer Service Number 1-855-236-7529
    Red more: https://tinyurl.com/y2a6eemd
    Red more: https://tinyurl.com/y6mdf5dv
    Website: https://www.techiesupportnumber.com/quickbooks-customer-service/

    ReplyDelete
  56. Hello Friends Today Available The Most Attractive And Vip Goa Escorts Girls
    Service For You.So Don't Waste Time Click My Site And Get My Whats
    App Number.

    ReplyDelete