{"id":3019,"date":"2023-03-16T02:00:20","date_gmt":"2023-03-16T02:00:20","guid":{"rendered":"https:\/\/yourpcb.com\/?p=3019"},"modified":"2023-03-16T10:23:20","modified_gmt":"2023-03-16T10:23:20","slug":"how-to-test-if-circuit-board-is-orking","status":"publish","type":"post","link":"https:\/\/yourpcb.com\/how-to-test-if-circuit-board-is-orking\/","title":{"rendered":"How To Test If Circuit Board Is Working"},"content":{"rendered":"\n<p>How To Test If Circuit Board Is Working? Every time you buy something new, like a phone or laptop, you\u2019re always eager to test it. <\/p>\n\n\n\n<p>The same energy and effort should be directed to testing your circuit board. <\/p>\n\n\n\n<p>However, unlike testing a phone or PC, a circuit board test requires technical expertise.&nbsp;<\/p>\n\n\n\n<p>Generally, the process involves doing a visual inspection of the circuit board. Moreover, it also involves checking power modules, input\/output ports, and communication ports. <\/p>\n\n\n\n<p>And after testing, you can even optimize the circuit board for future tests.&nbsp;<\/p>\n\n\n\n<p>This article focuses on how to test if the circuit board is working.&nbsp;<\/p>\n\n\n<h2 class=\"simpletoc-title\">Table of Contents<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#what-is-circuit-board-testing\">What Is Circuit Board Testing?<\/a>\n\n<\/li>\n<li><a href=\"#tools-you-require-for-circuit-board-testing\">Tools You Require for Circuit Board Testing<\/a>\n\n<\/li>\n<li><a href=\"#testing-a-circuit-board\">Testing A Circuit Board<\/a>\n\n\n<ul><li>\n<a href=\"#visual-inspection\">Visual Inspection<\/a>\n\n<\/li>\n<li><a href=\"#checking-the-power-module\">Checking The Power Module<\/a>\n\n<\/li>\n<li><a href=\"#checking-inputoutput-ports\">Checking Input\/Output Ports<\/a>\n\n<\/li>\n<li><a href=\"#checking-communication-ports\">Checking Communication Ports<\/a>\n\n<\/li>\n<\/ul>\n<li><a href=\"#optimizing-circuit-boards-for-future-testing\">Optimizing Circuit Boards for Future Testing<\/a>\n\n<\/li>\n<li><a href=\"#signs-that-show-you-need-circuit-board-testing\">Signs That Show You Need Circuit Board Testing<\/a>\n\n\n<ul><li>\n<a href=\"#burnt-components\">Burnt Components<\/a>\n\n<\/li>\n<li><a href=\"#improperly-manufactured-components\">Improperly Manufactured Components<\/a>\n\n<\/li>\n<li><a href=\"#environmentrelated-factors\">Environment-Related Factors<\/a>\n\n<\/li>\n<li><a href=\"#age\">Age<\/a>\n\n<\/li>\n<\/ul>\n<li><a href=\"#what-to-do-with-a-faulty-pcb\">What to Do With a Faulty PCB?<\/a>\n\n<\/li>\n<li><a href=\"#faq\">FAQ<\/a>\n\n\n<ul><li>\n<a href=\"#is-circuit-board-testing-important\">Is circuit board testing important?<\/a>\n\n<\/li>\n<li><a href=\"#is-circuit-board-testing-simple\">Is circuit board testing simple?<\/a>\n\n<\/li>\n<li><a href=\"#what-can-cause-your-circuit-board-to-failnbsp\">What can cause your circuit board to fail?&nbsp;<\/a>\n\n<\/li>\n<li><a href=\"#how-can-you-tell-if-a-circuit-board-is-bad\">How can you tell if a circuit board is bad?<\/a>\n\n<\/li>\n<\/ul>\n<li><a href=\"#conclusion\">Conclusion<\/a>\n<\/li><\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"what-is-circuit-board-testing\">What Is Circuit Board Testing?<\/h2>\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"654\" src=\"https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/1-40.jpg\" alt=\"Circuit board testing during repair\" class=\"wp-image-3024\" srcset=\"https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/1-40.jpg 1000w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/1-40-300x196.jpg 300w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/1-40-768x502.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\">(Circuit board testing during repair)<\/p>\n\n\n\n<p>This test involves checking for opens, resistance, shorts, capacitance, and other quantities to determine whether the board is fabricated correctly. <\/p>\n\n\n\n<p>Generally, you can do this either at the end of the fabrication process or when your <a href=\"https:\/\/yourpcb.com\/what-are-printed-circuit-boards-used-for\/#more-2570\" target=\"_blank\" rel=\"noreferrer noopener\">circuit board<\/a> misbehaves. <\/p>\n\n\n\n<p>You can achieve circuit board testing using simple tools like electrical probes, test lights, or a multimeter.&nbsp;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"tools-you-require-for-circuit-board-testing\">Tools You Require for Circuit Board Testing<\/h2>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/2-42-1024x682.jpg\" alt=\"A digital multimeter\" class=\"wp-image-3023\" srcset=\"https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/2-42-1024x682.jpg 1024w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/2-42-300x200.jpg 300w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/2-42-768x511.jpg 768w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/2-42-1536x1022.jpg 1536w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/2-42.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\">(A digital multimeter)<\/p>\n\n\n\n<p>You should thoroughly prepare for circuit board testing by acquiring the right tools. Check out some important tools you need:<\/p>\n\n\n\n<ul>\n<li>Soldering gun<\/li>\n\n\n\n<li>Analog\/digital multimeter<\/li>\n\n\n\n<li>Magnifying glass<\/li>\n\n\n\n<li>Desoldering station<\/li>\n<\/ul>\n\n\n\n<p>Generally, you\u2019ll use these tools for solving problems like broken traces, faulty components, and short circuits.&nbsp;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"testing-a-circuit-board\">Testing A Circuit Board<\/h2>\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/3-41.jpg\" alt=\"An engineer testing a circuit board\" class=\"wp-image-3022\" srcset=\"https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/3-41.jpg 1000w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/3-41-300x200.jpg 300w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/3-41-768x512.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\">(An engineer testing a circuit board)<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"visual-inspection\">Visual Inspection<\/h3>\n\n\n<p>Sometimes, you can identify broken or damaged areas by observing with your eyes. <\/p>\n\n\n\n<p>Electrical surges damage most circuit components, and you can easily identify signs on your PCB. <\/p>\n\n\n\n<p>Therefore, check out for burnt spots, especially on the connectivity ports, power supply modules, and input\/output modules. <\/p>\n\n\n\n<p>Surprisingly, you can even trace a damaged circuit board by its acrid scent.\u00a0<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"checking-the-power-module\">Checking The Power Module<\/h3>\n\n\n<p>If the circuit board is fine at this point, power up your circuit board. Afterward, measure the power rail\u2019s voltage using a <a href=\"https:\/\/en.wikipedia.org\/wiki\/Multimeter\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">multimeter<\/a>. <\/p>\n\n\n\n<p>Ensure the regulator\u2019s input and output shows the expected value. However, if the voltage reads 0V, we recommend replacing the fuse.&nbsp;<\/p>\n\n\n\n<p>Sometimes even after replacing the fuse, it\u2019ll still fail immediately. <\/p>\n\n\n\n<p>This means other components within the circuit are shorted. In this case, the shorted component will always emit excessive heat. <\/p>\n\n\n\n<p>Therefore, you can easily identify the component by checking for the component that is hotter than usual.&nbsp;<\/p>\n\n\n\n<p>Even after removing and replacing this component, there is still a high chance your circuit board voltage value won\u2019t read as expected. <\/p>\n\n\n\n<p>Therefore, check the schematic and remove another component near the PCB edge.&nbsp;<\/p>\n\n\n\n<p>And if you don\u2019t find a hot component, you can check for broken traces. A multimeter could help you narrow down to where the problem is.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"checking-inputoutput-ports\">Checking Input\/Output Ports<\/h3>\n\n\n<p>The input\/output ports are common failure points people ignore. Surprisingly, their failure might not result in a system shutdown. <\/p>\n\n\n\n<p>However, one way or the other, they\u2019ll cause problems in circuit operation. <\/p>\n\n\n\n<p>Therefore, always ensure the input\/output ports are functioning properly.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"checking-communication-ports\">Checking Communication Ports<\/h3>\n\n\n<p>A circuit port will always have a communication port like RS485 or ethernet. <\/p>\n\n\n\n<p>Therefore, such ports might fail to function properly. When such happens, look for cracked or burned communication components ICs.<\/p>\n\n\n\n<p>Moreover, check the protective component like <a href=\"https:\/\/en.wikipedia.org\/wiki\/Zener_diode\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Zener diodes<\/a>.&nbsp;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"optimizing-circuit-boards-for-future-testing\">Optimizing Circuit Boards for Future Testing<\/h2>\n\n\n<p>By now, you should know that circuit testing is challenging. Therefore, you should optimize it for future troubleshooting. <\/p>\n\n\n\n<p>To begin with, create testing pads for critical signals and voltages. <\/p>\n\n\n\n<p>This way, you won\u2019t have to short any neighboring trace with your multimeter probes.&nbsp;<\/p>\n\n\n\n<p>Moreover, you can employ LEDs as visual indicators for input\/output, communication, and power. This way, you can determine problematic areas without much probing.&nbsp;<\/p>\n\n\n\n<p>While doing this, ensure you employ the right <a href=\"https:\/\/yourpcb.com\/best-circuit-design-software\/#more-2733\" target=\"_blank\" rel=\"noreferrer noopener\">circuit board design and analysis software<\/a>. Finally, ensure you position test points in strategic areas.&nbsp;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"signs-that-show-you-need-circuit-board-testing\">Signs That Show You Need Circuit Board Testing<\/h2>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"680\" src=\"https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/4-37-1024x680.jpg\" alt=\"A burnt circuit board\" class=\"wp-image-3021\" srcset=\"https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/4-37-1024x680.jpg 1024w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/4-37-300x199.jpg 300w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/4-37-768x510.jpg 768w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/4-37-1536x1020.jpg 1536w, https:\/\/yourpcb.com\/wp-content\/uploads\/2023\/03\/4-37.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\">(A burnt circuit board)<\/p>\n\n\n\n<p>You shouldn\u2019t wake up and do circuit board testing for fun. Certain circuit board failures you should identify should guide how and when to do the tests. <\/p>\n\n\n\n<p>Check out the causes of circuit board failures below:<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"burnt-components\">Burnt Components<\/h3>\n\n\n<p>We guarantee that your circuit board component will burn if exposed to high temperatures. <\/p>\n\n\n\n<p>Moreover, your components have a higher chance of burning when the surrounding area becomes insufficient.&nbsp;<\/p>\n\n\n\n<p>Surprisingly, a component\u2019s size and shape also determine its heat tolerance. <\/p>\n\n\n\n<p>Generally, when your components get burned and stop functioning normally, you should make a replacement. Otherwise, the problem could extend to other components.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"improperly-manufactured-components\">Improperly Manufactured Components<\/h3>\n\n\n<p>Many problems arise, especially with improperly placed components and power supply issues. Also, many people complain of chemical leaks, barrier breakage, and <a href=\"https:\/\/yourpcb.com\/what-is-flux-for-soldering\/#more-2817\" target=\"_blank\" rel=\"noreferrer noopener\">soldering<\/a> challenges. <\/p>\n\n\n\n<p>Therefore, you should have certain requirements in mind to reduce such errors. Check out for loose components, bad solder, and poor connectivity, and conduct a circuit test.&nbsp;<\/p>\n\n\n\n<p>However, to minimize circuit board failure, employ an automated manufacturing process.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"environmentrelated-factors\">Environment-Related Factors<\/h3>\n\n\n<p>Your environment should determine whether or not you do a circuit board test. Surprisingly, assembling your components in a humid room may affect the component reaction. <\/p>\n\n\n\n<p>Therefore, you must regulate environmental conditions to keep your PCB in good condition.&nbsp;<\/p>\n\n\n\n<p>Also, understand that moisture, heat, dust, accidental falls, and overloads might be responsible for a circuit board failure. <\/p>\n\n\n\n<p>Therefore, if you ever suspect that any of the above situations happened, immediately do a circuit board test to correct the issue.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"age\">Age<\/h3>\n\n\n<p>We understand that no matter how good something is made, it\u2019ll never last forever. Therefore, expect your circuit board to fail or become vulnerable over time. <\/p>\n\n\n\n<p>The good news is that such vulnerabilities and failures can always be corrected.&nbsp;<\/p>\n\n\n\n<p>Failures due to age are inevitable, but replace faulty components with economical and sustainable options when they happen. Generally, as your circuit board age, ensure you do tests regularly.&nbsp;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"what-to-do-with-a-faulty-pcb\">What to Do With a Faulty PCB?<\/h2>\n\n\n<p>If a circuit board becomes faulty for one reason, it might damage all components. Therefore, you need to move immediately and repair the damaged board. <\/p>\n\n\n\n<p>In this case, you\u2019ll have to replace a few damaged components.&nbsp;<\/p>\n\n\n\n<p>However, as per Environmental Protection Agency requirements, you can also choose to replace the whole circuit board to limit hazards from the damaged parts. <\/p>\n\n\n\n<p>Therefore, you can consult an expert to help you determine whether repair or replacement is the best option.&nbsp;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">FAQ<\/h2>\n\n<h3 class=\"wp-block-heading\" id=\"is-circuit-board-testing-important\">Is circuit board testing important?<\/h3>\n\n\n<p>Yes! <\/p>\n\n\n\n<p>Testing is important since it helps you identify possible faults or errors that might lead to malfunctioning in your circuit board. <\/p>\n\n\n\n<p>Also, in the case of a damaged board, it becomes easier to identify where the problem for immediate repair.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"is-circuit-board-testing-simple\">Is circuit board testing simple?<\/h3>\n\n\n<p>Generally, circuit testing is a complex process only professionals can do to the required precision. <\/p>\n\n\n\n<p>But still, it\u2019s something you can learn to perfection. Optimizing the circuit board for future <a href=\"https:\/\/en.wikipedia.org\/wiki\/Troubleshooting\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">troubleshooting<\/a> can simplify your testing.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"what-can-cause-your-circuit-board-to-failnbsp\">What can cause your circuit board to fail? <\/h3>\n\n\n<p>Your circuit board might fail due to moisture, dust, and heat exposure. Moreover, power overloads and accidental impacts cause serious failures. <\/p>\n\n\n\n<p>Finally, you might experience premature circuit failure at the assembly state, thanks to electrostatic discharge.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"how-can-you-tell-if-a-circuit-board-is-bad\">How can you tell if a circuit board is bad?<\/h3>\n\n\n<p>The most common signs of a damaged circuit board are cracked wires, burn marks, scratches, crushed components, and misplaced solder. <\/p>\n\n\n\n<p>Moreover, a damaged circuit board will cease to function normally. When this happens, you must repair or replace the circuit board.&nbsp;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\">Conclusion<\/h2>\n\n\n<p>As we\u2019ve highlighted, circuit board testing involves checking for opens, resistance, shorts, capacitance, and other quantities to determine whether the board is fabricated correctly. <\/p>\n\n\n\n<p>Consequently, you can identify faults and errors and, if possible, replace or repair the circuit board.&nbsp;<\/p>\n\n\n\n<p>During testing, there are obvious things to help you identify a damaged circuit board, including burn marks, crushed components, and cracked wires. <\/p>\n\n\n\n<p>Consult a professional whenever you need to do a circuit test but lack the knowledge.&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How To Test If Circuit Board Is Working? Every time you buy something new, like a phone or laptop, you\u2019re always eager to test it. The same energy and effort should be directed to testing your circuit board. However, unlike testing a phone or PC, a circuit board test requires technical expertise.&nbsp; Generally, the process &#8230; <a title=\"How To Test If Circuit Board Is Working\" class=\"read-more\" href=\"https:\/\/yourpcb.com\/how-to-test-if-circuit-board-is-orking\/\" aria-label=\"More on How To Test If Circuit Board Is Working\">Read more<\/a><\/p>\n","protected":false},"author":6,"featured_media":3020,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How To Test If Circuit Board Is Working<\/title>\n<meta name=\"description\" content=\"How To Test If Circuit Board Is Working? 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