{"id":1516,"date":"2026-10-12T17:00:00","date_gmt":"2026-10-12T09:00:00","guid":{"rendered":"https:\/\/www.jingpengpcb.com\/?p=1516"},"modified":"2026-10-08T20:14:32","modified_gmt":"2026-10-08T12:14:32","slug":"pcb-short-circuit-repair","status":"publish","type":"post","link":"https:\/\/www.jingpengpcb.com\/en\/blog\/pcb-short-circuit-repair\/","title":{"rendered":"How to Troubleshoot a Short Circuit on a PCB? 5 Methods for Locating Short Circuits"},"content":{"rendered":"<style>\n.jp-tw{overflow-x:auto;margin:26px 0;-webkit-overflow-scrolling:touch;}\n.jp-tw table{border-collapse:collapse;width:100%;min-width:560px;font-size:15px;line-height:1.65;background:#fff;}\n.jp-tw th,.jp-tw td{border:1px solid #dde3ea;padding:11px 14px;text-align:left;vertical-align:top;}\n.jp-tw thead th{background:#eef2f7;color:#1b2733;font-weight:700;white-space:nowrap;border-bottom:2px solid #c9d3de;}\n.jp-tw tbody tr:nth-child(even){background:#fafbfc;}\n.jp-tw tbody tr:hover{background:#f1f5fa;}\n.jp-tw tbody td:first-child{font-weight:600;color:#1b2733;}\n@media(max-width:767px){.jp-tw table{font-size:14px;min-width:520px;}.jp-tw th,.jp-tw td{padding:9px 11px;}}\n<\/style>\n<p>\u5728<a href=\"\/en\/smt-factory\/\">SMT Assembly<\/a>One of the most common defects that can occur during the PCB manufacturing process is a short circuit. To prevent short circuits from affecting efficiency, it is necessary to inspect the circuit boards and address any issues promptly. So, how do you check for short circuits on a PCB? Let\u2019s take a look at the following information.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"721\" class=\"alignnone size-large wp-image-8787\" src=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/four-characteristics-of-pcb-rf-circuit-1.jpg\" alt=\"Causes of Short Circuits at Fixed Points on PCBs and Solutions\" srcset=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/four-characteristics-of-pcb-rf-circuit-1.jpg 1280w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/four-characteristics-of-pcb-rf-circuit-1-300x169.jpg 300w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/four-characteristics-of-pcb-rf-circuit-1-1024x577.jpg 1024w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/four-characteristics-of-pcb-rf-circuit-1-768x433.jpg 768w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h2>1. First, identify the category: At which layer did the short circuit actually occur?<\/h2>\n<p>Categorizing the issues before troubleshooting can save you half the time. PCB short circuits are divided into four categories based on their causes, and the methods for locating them are completely different:<\/p>\n<div class=\"jp-tw\">\n<table>\n<thead>\n<tr>\n<th>Type<\/th>\n<th>Typical Symptoms<\/th>\n<th>High-Risk Areas<\/th>\n<th>Can it be repaired?<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Design-Induced Short Circuit<\/td>\n<td>Short circuits between different potentials within the same network; reversed packaging orientation<\/td>\n<td>Schematic\/Package Library<\/td>\n<td>Revised version; cannot be edited on-site<\/td>\n<\/tr>\n<tr>\n<td>Artificial Short Circuit<\/td>\n<td>Etching residue, copper plating nodules, interlayer dielectric breakdown<\/td>\n<td>Circuit Transfer, Electroplating, Laminating<\/td>\n<td>Some can be repaired; most are scrapped.<\/td>\n<\/tr>\n<tr>\n<td>Assembly-Related Short Circuit<\/td>\n<td>Solder bridges, solder balls, misplaced components, reversed polarity<\/td>\n<td>Solder Paste Printing, Placement, and Reflow<\/td>\n<td>Most are repairable<\/td>\n<\/tr>\n<tr>\n<td>Operational Short Circuit<\/td>\n<td>CAF growth, dendrites, foreign matter, moisture absorption<\/td>\n<td>Long-term service<\/td>\n<td>Usually cannot be repaired<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>A short circuit encountered on site,<strong>About 70 percent are assembly-type<\/strong>... 20 percent is due to manufacturing issues, and the remainder is attributable to design and usability. Therefore, the troubleshooting sequence should be: first, perform a visual inspection and AOI scan to identify solder bridges and solder balls \u2192 then use electrical testing to pinpoint the location \u2192 and only then should internal board defects be suspected.<\/p>\n<h2>2. Methods for Checking PCB Short Circuits:<\/h2>\n<h3>2.1 Using a Short-Circuit Location Analyzer<\/h3>\n<p>A short-circuit location analyzer is a highly effective tool for pinpointing the location of short circuits on a PCB. By carefully scanning the circuit board, it can quickly identify potential short-circuit issues.<\/p>\n<h3>2.2 Open the PCB design and draw the layout on the computer<\/h3>\n<p>By opening the PCB design file and performing graphical analysis on your computer, you can more easily identify potential short circuits. Check the circuit network, paying particular attention to internal short circuits in ICs.<\/p>\n<h3>2.3 Gradually Disconnect the Circuit<\/h3>\n<p>If a short circuit is detected, you can use the method of progressively disconnecting the circuit to identify the problem. Using a circuit board\u2014especially a single-layer or double-layer board\u2014progressively disconnect the circuit and then power it on section by section to gradually eliminate the short circuit.<\/p>\n<h3>2.4 For BGA chips, use ferrite beads or 0-ohm resistors<\/h3>\n<p>For BGA chips, since all solder joints are covered by the chip, they may not be directly visible. For multilayer boards (4 layers or more), it is recommended to use ferrite beads or 0-ohm resistors. During the design phase, separate the power supplies for each chip; this way, if a short circuit occurs between the power supply and ground, the ferrite bead will interrupt the circuit, making it easier to locate the problem.<\/p>\n<h3>2.5 Exercise caution when soldering small surface-mount capacitors<\/h3>\n<p>Pay special attention to small surface-mount capacitors, particularly power supply filter capacitors (103 or 104), as they are numerous and can easily cause a short circuit between the power supply and ground. It is best to test these capacitors before soldering to ensure they are in good working order.<\/p>\n<h3>2.6 Developing Good Welding Habits<\/h3>\n<p>When soldering by hand, it\u2019s very important to develop good habits. Before soldering, visually inspect the PCB and use a multimeter to check critical circuits\u2014especially the power supply and ground\u2014for short circuits. After soldering each chip, test it with a multimeter to ensure the circuit is functioning properly. Additionally, be careful not to toss your soldering iron carelessly to prevent accidental damage.<\/p>\n<h2>3. The Limits of Six Positioning Methods<\/h2>\n<p>Each of the six methods listed above has its own limitations, and choosing the wrong one will be a waste of time:<\/p>\n<div class=\"jp-tw\">\n<table>\n<thead>\n<tr>\n<th>Means<\/th>\n<th>Can be located<\/th>\n<th>Applicable Board Types<\/th>\n<th>Time taken<\/th>\n<th>Limitations<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Short-Circuit Location Analyzer<\/td>\n<td>Specific coordinates (to the nearest centimeter)<\/td>\n<td>Any<\/td>\n<td>a few minutes<\/td>\n<td>The equipment is expensive and rarely found in small factories.<\/td>\n<\/tr>\n<tr>\n<td>Design Document Review<\/td>\n<td>Network\/Packet Level<\/td>\n<td>Any<\/td>\n<td>10\u201330 minutes<\/td>\n<td>Look only for design errors<\/td>\n<\/tr>\n<tr>\n<td>Gradually cut the power supply<\/td>\n<td>Regional-level<\/td>\n<td>Single-layer\/Double-layer Board<\/td>\n<td>30 minutes\u2013several hours<\/td>\n<td>Destructive; not suitable for multilayer boards<\/td>\n<\/tr>\n<tr>\n<td>Ferrite Beads\/0\u03a9 Zone<\/td>\n<td>Power Domain Level<\/td>\n<td>Multilayer boards with 4 or more layers<\/td>\n<td>Embedded during the design phase<\/td>\n<td>This requires advance planning; it cannot be made up for later.<\/td>\n<\/tr>\n<tr>\n<td>Measure the capacitors one by one<\/td>\n<td>Component-level<\/td>\n<td>Any<\/td>\n<td>10\u201320 minutes<\/td>\n<td>Cover only the power decoupling capacitors<\/td>\n<\/tr>\n<tr>\n<td>Multimeter Range Selection<\/td>\n<td>Network-level<\/td>\n<td>Any<\/td>\n<td>5\u201330 minutes<\/td>\n<td>Insufficient resolution for low-resistance short circuits (&lt;1 \u03a9)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"609\" height=\"342\" class=\"alignnone size-large wp-image-8788\" src=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/pcb-fixed-position-short-circuit.jpg\" alt=\"Causes of Short Circuits at Fixed Points on PCBs and Solutions\" srcset=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/pcb-fixed-position-short-circuit.jpg 609w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/pcb-fixed-position-short-circuit-300x168.jpg 300w\" sizes=\"auto, (max-width: 609px) 100vw, 609px\" \/><\/p>\n<h2>4. Advanced Techniques: How to Troubleshoot Low-Resistance Short Circuits<\/h2>\n<p>When the short-circuit resistance is only a few tens of milliohms, the multimeter\u2019s buzzer function becomes completely ineffective\u2014it cannot distinguish between 0.05 \u03a9 and 0.5 \u03a9. In this case, three advanced methods are required:<\/p>\n<ol>\n<li><strong>Milliohm Meter \/ Microohmmeter\u2014Four-Wire Method<\/strong>: Using a four-wire Kelvin measurement to eliminate the resistance of the test leads allows for resolution down to the 1 m\u03a9 range. Measure in sections along the short-circuit network; the section with the lowest resistance is the one closest to the fault point.<\/li>\n<li><strong>Constant Current Source + Voltage Drop Scan<\/strong>: Apply a constant current of 1\u20133 A to the short-circuited network (with the voltage limited to within 0.5 V to prevent device damage), and scan along the traces with a millivoltmeter; the point where the voltage gradient changes abruptly is the fault location. This is the most practical method for locating short circuits in inner layers.<\/li>\n<li><strong>Thermal Imaging<\/strong>: When applying a constant current, use an infrared thermal imager to observe hot spots. Solder bridges, copper nodules, and CAF channels will all heat up due to current concentration, and bright spots will become visible within a few seconds. Be careful not to set the current too high, as this could burn out the channel.<\/li>\n<\/ol>\n<p>Two other low-cost techniques are very useful for small-scale repairs:<strong>Rosin Fumigation Method<\/strong>(After applying rosin, apply an electric current; the short-circuit point melts first and emits smoke) and<strong>Freeze-Spray Method<\/strong>(After spraying the refrigerant, apply power; the frost at the short-circuit point will melt first.) Both methods rely on localized heat generation at the short-circuit point and are ineffective against high-resistance short circuits.<\/p>\n<p>If it is a BGA or an internal short circuit, neither visual inspection nor electrical testing will be effective; it is necessary to<a href=\"\/en\/blog\/x-ray-inspection-pcba-quality-control\/\">X-ray Inspection<\/a>Or cross-section analysis. X-rays can directly reveal solder bridges and voids beneath the BGA, while cross-sections are used to identify defects in the interlayer dielectric.<\/p>\n<h2>5. The Application of SMT Placement Machines in Contract Manufacturing<\/h2>\n<p>Surface-mount technology (SMT) is an indispensable part of electronic product manufacturing. Typically, solder paste printing and reflow soldering can complete the printing and soldering of an entire PCB in a single pass, whereas SMT components must be placed one by one. In this context, the performance of the SMT placement machine is critical to production efficiency and quality.<\/p>\n<p>SMT placement machines are the core equipment in SMT product assembly lines and determine the level of automation in electronic product assembly technology. The sophistication of these machines directly affects placement accuracy and efficiency.<\/p>\n<h2>6. What is surface-mount assembly? How does a surface-mount placement machine work?<\/h2>\n<p>SMT assembly involves removing surface-mount components (such as SMDs) from their packages and placing them onto designated pad locations on a PCB. This process is commonly referred to as \u201cpicking and placing.\u201d Before placement, the pad locations are usually either coated with solder paste or adhesive.<\/p>\n<p>The basic workflow of a surface-mount placement machine is as follows:<\/p>\n<ol>\n<li>The PCB is fed to the SMT machine's workstation, where it is optically aligned and secured.<\/li>\n<li>The feeder delivers the components to be installed to the pick-up station of the placement machine, which uses an appropriate nozzle to pick up the components from their packages.<\/li>\n<li>When the placement head delivers components to the PCB, the placement machine\u2019s automatic optical inspection system inspects the components and performs alignment correction.<\/li>\n<li>Once the placement head reaches the designated position, it controls the nozzle to accurately place the component on the specified pad on the PCB using appropriate pressure, and bonds the component using pre-applied solder paste or surface-mount adhesive.<\/li>\n<li>Repeat the above steps until all components to be installed have been placed. The PCB is then removed from the placement machine and prepared for the next step.<\/li>\n<\/ol>\n<p>The use of SMT placement machines enables efficient and precise component placement, thereby improving production efficiency and product quality.<\/p>\n<p>To assess whether a SMT placement machine is suitable for fine-pitch products, simply consider these four metrics:<\/p>\n<ul>\n<li><strong>Placement Accuracy<\/strong>: Repeatability, typically ranging from \u00b150 \u03bcm (chip components) to \u00b125 \u03bcm (fine-pitch ICs).<\/li>\n<li><strong>Placement Speed<\/strong>: CPH (components per hour) must be adjusted based on the actual component configuration; the manufacturer's rated value is typically based on optimal conditions.<\/li>\n<li><strong>Range of Components That Can Be Processed<\/strong>: Minimum 0201\/01005; maximum: irregularly shaped parts and long connectors.<\/li>\n<li><strong>Visual Alignment Skills<\/strong>: Does it support bottom-side inspection, BGA ball-to-ball alignment, and bad board marking recognition (Bad Mark)?<\/li>\n<\/ul>\n<h2>7. The Six Most Common Causes of Short Circuits<\/h2>\n<p>According to on-site statistics, the sources of short circuits during the assembly phase are highly concentrated in six areas:<\/p>\n<ul>\n<li><strong>Excess Solder Paste or Sagging During Solder Paste Printing<\/strong>: Excessively large openings in the steel mesh, improper solder paste viscosity, and excessive dwell time after printing\u2014which cause edge collapse\u2014are the primary causes of solder bridges.<\/li>\n<li><strong>Fine-Pitch Component Bridging<\/strong>: QFN\/QFP packages with a pitch of 0.4 mm or less, as well as 0201 components, are extremely sensitive to solder paste volume and placement accuracy.<\/li>\n<li><strong>Wrong components or reversed polarity<\/strong>: If diodes, LEDs, or tantalum capacitors are connected in reverse, they will directly create a low-resistance path between the power supply and ground.<\/li>\n<li><strong>Solder Ball Residue<\/strong>: If the solder beads splashed during the reflow process are not cleaned away, they will roll around during subsequent vibration and cause random short circuits.<\/li>\n<li><strong>PCB Pad Design Defects<\/strong>: Insufficient pad spacing, missing solder mask bridges, and improper solder pad connections.<\/li>\n<li><strong>Poor Manual Soldering<\/strong>: Excessive soldering iron temperature causes the pad to be removed; conductive flux residue; improper control of solder volume.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"569\" height=\"320\" class=\"alignnone size-large wp-image-6627\" src=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/preventing-circuit-board-short-circuits.jpg\" alt=\"How to Prevent Short Circuits on Circuit Boards\" srcset=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/preventing-circuit-board-short-circuits.jpg 569w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/preventing-circuit-board-short-circuits-300x169.jpg 300w\" sizes=\"auto, (max-width: 569px) 100vw, 569px\" \/><\/p>\n<h2>8. Prevention: Checklists for Design and Manufacturing<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"506\" class=\"alignnone size-large wp-image-8800\" src=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/why-do-pcbs-need-test-points.jpg\" alt=\"\u4e3a\u4ec0\u4e48PCB\u9700\u8981\u6d4b\u8bd5\u70b9\" srcset=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/why-do-pcbs-need-test-points.jpg 900w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/why-do-pcbs-need-test-points-300x169.jpg 300w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/why-do-pcbs-need-test-points-768x432.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/p>\n<p>The key to addressing short circuits lies in prevention. Here are seven steps you can take during the design phase:<\/p>\n<ol>\n<li><strong>Power Domain Partitioning<\/strong>: The power supply for each major chip is routed independently via a ferrite bead or a 0\u03a9 resistor; in the event of a short circuit, simply disconnecting it allows you to pinpoint the affected area. This is the most valuable tip, and it costs almost nothing.<\/li>\n<li><strong>Package Library Review<\/strong>: The packaging of new devices must undergo a first-article inspection; the marking on pin 1 must match the silkscreen.<\/li>\n<li><strong>Solder Mask Bridge Inspection<\/strong>: Solder mask bridges must be maintained between closely spaced pads; when the spacing is less than 0.2 mm, the solder mask process capability must be evaluated.<\/li>\n<li><strong>DFM Spacing Verification<\/strong>: Process allowances must be provided for line spacing, pad spacing, and hole-to-wall spacing; do not design right at the lower limit of capability.<\/li>\n<li><strong>Reserved Test Points<\/strong>: Test points should be left on each power network and critical signal line so that flying probes and ICT can make contact. For more details on the purpose of this, see<a href=\"\/en\/blog\/pcb-assembly-inspection\/\">PCB Assembly and Inspection Guide<\/a>\u3002<\/li>\n<li><strong>Selecting Decoupling Capacitors<\/strong>: Capacitors 103 and 104 (0402\/0201) are the most numerous; prioritize models with terminal protection and good bending strength.<\/li>\n<li><strong>Clear Polarity Screen Printing<\/strong>: The polarity markings for diodes and tantalum capacitors should be placed on the component body in a visible location to prevent situations where they cannot be visually inspected if installed upside down.<\/li>\n<\/ol>\n<p>Four Control Points in the Manufacturing and Assembly Phases: Solder Paste Printing <strong>SPI 100% Inspection<\/strong>(3D inspection of solder volume, area, and height), after reflow <strong>AOI 100% Inspection<\/strong>\u3001<strong>Reflow Profile Verification According to Device Specifications<\/strong>(The heating rate and peak temperature directly determine the formation of solder balls and bridging), as well as<strong>Electrical Testing Coverage<\/strong>. For information on differences in electrical testing methods, please refer to<a href=\"\/en\/pcba-testing\/\">PCBA Testing<\/a>\u4e0e<a href=\"\/en\/blog\/electrical-testing\/\">Electrical Testing<\/a>\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"720\" class=\"alignnone size-large wp-image-5982\" src=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/07\/pcb-flying-probe-test.webp\" alt=\"Flying Probe Test\" srcset=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/07\/pcb-flying-probe-test.webp 1280w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/07\/pcb-flying-probe-test-300x169.webp 300w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/07\/pcb-flying-probe-test-1024x576.webp 1024w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/07\/pcb-flying-probe-test-768x432.webp 768w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/07\/pcb-flying-probe-test-400x225.webp 400w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h2>9. Comparison of Defects and Countermeasures<\/h2>\n<div class=\"jp-tw\">\n<table>\n<thead>\n<tr>\n<th>Phenomenon<\/th>\n<th>Root Cause<\/th>\n<th>\u5feb\u901f\u9a8c\u8bc1<\/th>\n<th>Countermeasures<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u6279\u91cf\u51fa\u73b0\u540c\u4e00\u4f4d\u7f6e\u77ed\u8def<\/td>\n<td>\u8bbe\u8ba1\u6216\u94a2\u7f51\u5f00\u53e3\u95ee\u9898<\/td>\n<td>\u5bf9\u7167 Gerber \u4e0e\u94a2\u7f51\u6587\u4ef6<\/td>\n<td>\u6539\u7248\u6216\u6539\u94a2\u7f51\u5f00\u53e3\uff08\u5185\u7f29 10%\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u968f\u673a\u4f4d\u7f6e\u9521\u6865<\/td>\n<td>\u9521\u818f\u5370\u5237\u91cf\u504f\u5927\/\u584c\u8fb9<\/td>\n<td>SPI \u6570\u636e\u770b\u9521\u91cf\u5206\u5e03<\/td>\n<td>\u964d\u9521\u818f\u91cf\u3001\u7f29\u77ed\u5370\u5237\u540e\u505c\u7559\u65f6\u95f4<\/td>\n<\/tr>\n<tr>\n<td>\u7535\u6e90\u4e0e\u5730\u4f4e\u963b\uff08\u51e0\u6b27\uff09<\/td>\n<td>\u7535\u5bb9\u9519\u4ef6\u6216\u53cd\u63a5<\/td>\n<td>\u70ed\u6210\u50cf\u5b9a\u4f4d\u53d1\u70ed\u70b9<\/td>\n<td>\u66f4\u6362\u5143\u4ef6\u3001\u6838\u5bf9 BOM \u6781\u6027<\/td>\n<\/tr>\n<tr>\n<td>BGA \u4e0b\u77ed\u8def<\/td>\n<td>\u9521\u6865\u6216 PCB \u901a\u5b54\u7f3a\u9677<\/td>\n<td>X \u5149\u68c0\u67e5<\/td>\n<td>\u8fd4\u4fee\u91cd\u690d\u7403\uff0c\u4e25\u91cd\u5219\u62a5\u5e9f<\/td>\n<\/tr>\n<tr>\n<td>\u6574\u677f\u591a\u5904\u5fae\u77ed\u8def<\/td>\n<td>CAF\/\u79bb\u5b50\u8fc1\u79fb\u3001\u53d7\u6f6e<\/td>\n<td>\u70d8\u677f\u540e\u590d\u6d4b\u662f\u5426\u6d88\u5931<\/td>\n<td>\u6362\u9ad8 CAF \u8010\u53d7\u677f\u6750\u3001\u6539\u5584\u9632\u6f6e<\/td>\n<\/tr>\n<tr>\n<td>\u901a\u7535\u4e00\u6bb5\u65f6\u95f4\u540e\u51fa\u73b0<\/td>\n<td>\u9521\u73e0\/\u91d1\u5c5e\u5f02\u7269\u8fc1\u79fb<\/td>\n<td>\u6e05\u6d17\u540e\u590d\u6d4b<\/td>\n<td>\u52a0\u5f3a\u6e05\u6d17\u3001\u6539\u5584\u4f5c\u4e1a\u73af\u5883<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>10. \u4fee\u590d\u5224\u5b9a\uff1a\u4ec0\u4e48\u60c5\u51b5\u8be5\u62a5\u5e9f<\/h2>\n<p>\u77ed\u8def\u4fee\u4e0d\u4fee\uff0c\u53d6\u51b3\u4e8e\u4e09\u4ef6\u4e8b\uff1a<\/p>\n<ul>\n<li><strong>\u4f4d\u7f6e<\/strong>\uff1a\u8868\u5c42\u7684\u9521\u6865\u3001\u9519\u4ef6\u53ef\u4ee5\u8fd4\u4fee\uff1b\u5185\u5c42\u77ed\u8def\u3001\u5b54\u94dc\u5f02\u5e38\u3001\u4ecb\u8d28\u51fb\u7a7f\u65e0\u6cd5\u4fee\u590d\u3002<\/li>\n<li><strong>\u53ef\u9760\u6027\u7b49\u7ea7<\/strong>\uff1a\u8f66\u8f7d\u3001\u533b\u7597\u3001\u822a\u7a7a\u822a\u5929\u4ea7\u54c1\u4e00\u822c\u4e0d\u5141\u8bb8\u5bf9\u5185\u5c42\u7f3a\u9677\u505a\u4efb\u4f55\u4fee\u8865\uff0c\u76f4\u63a5\u62a5\u5e9f\u3002<\/li>\n<li><strong>\u70ed\u635f\u4f24<\/strong>\uff1a\u77ed\u8def\u70b9\u82e5\u5df2\u9020\u6210\u57fa\u6750\u78b3\u5316\uff0c\u5373\u4f7f\u8868\u9762\u4fee\u597d\uff0c\u78b3\u5316\u533a\u5728\u540e\u7eed\u4f1a\u7ee7\u7eed\u5438\u6f6e\u5e76\u751f\u957f CAF\uff0c\u5fc5\u987b\u4e00\u5e76\u53bb\u9664\u3002<\/li>\n<\/ul>\n<p>\u8fd4\u4fee\u540e\u5fc5\u987b\u91cd\u65b0\u505a\u5b8c\u6574\u7535\u6d4b\uff0c\u4e0d\u80fd\u53ea\u6d4b\u77ed\u8def\u70b9\u3002\u56e0\u4e3a\u8fd4\u4fee\u8fc7\u7a0b\u7684\u70ed\u5e94\u529b\u53ef\u80fd\u635f\u4f24\u90bb\u8fd1\u710a\u70b9\u4e0e\u5668\u4ef6\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u6709\u5173PCB\u77ed\u8def\u68c0\u67e5\u4ee5\u53caSMT\u8d34\u7247\u673a\u7684\u57fa\u672c\u4fe1\u606f\u3002\u5728PCB\u5236\u9020\u548c\u7535\u5b50\u4ea7\u54c1\u7ec4\u88c5\u4e2d\uff0c\u8fd9\u4e9b\u77e5\u8bc6\u90fd\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u5e0c\u671b\u8fd9\u7bc7\u6587\u7ae0\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<p><strong>Conclusion<\/strong><\/p>\n<p>\u672c\u6587\u4ecb\u7ecd\u4e86PCB\u77ed\u8def\u7684\u68c0\u67e5\u65b9\u6cd5\u4ee5\u53caSMT\u8d34\u7247\u673a\u5728\u7535\u5b50\u4ea7\u54c1\u7ec4\u88c5\u4e2d\u7684\u5e94\u7528\u3002\u6b63\u786e\u7684\u77ed\u8def\u68c0\u67e5\u65b9\u6cd5\u5bf9\u4e8e\u786e\u4fdd\u7535\u8def\u677f\u8d28\u91cf\u81f3\u5173\u91cd\u8981\u3002\u540c\u65f6\uff0cSMT\u8d34\u7247\u673a\u5728\u73b0\u4ee3\u7535\u5b50\u5236\u9020\u4e2d\u626e\u6f14\u7740\u5173\u952e\u7684\u89d2\u8272\uff0c\u53ef\u4ee5\u9ad8\u6548\u5730\u5b8c\u6210\u5143\u5668\u4ef6\u7684\u8d34\u88c5\u4efb\u52a1\u3002<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<h3>1. PCB\u77ed\u8def\u5982\u4f55\u5f71\u54cd\u7535\u5b50\u4ea7\u54c1\u7684\u6027\u80fd\uff1f<\/h3>\n<p>PCB\u77ed\u8def\u53ef\u80fd\u5bfc\u81f4\u7535\u5b50\u4ea7\u54c1\u6027\u80fd\u4e0b\u964d\uff0c\u751a\u81f3\u5b8c\u5168\u6545\u969c\u3002\u77ed\u8def\u53ef\u80fd\u5bfc\u81f4\u7535\u8def\u4e2d\u65ad\u3001\u7535\u538b\u4e0d\u7a33\u5b9a\u7b49\u95ee\u9898\uff0c\u5f71\u54cd\u7535\u5b50\u4ea7\u54c1\u7684\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n<h3>2. SMT\u8d34\u7247\u673a\u7684\u8d34\u88c5\u7cbe\u5ea6\u6709\u591a\u9ad8\uff1f<\/h3>\n<p>SMT\u8d34\u7247\u673a\u53ef\u4ee5\u5b9e\u73b0\u975e\u5e38\u9ad8\u7684\u8d34\u88c5\u7cbe\u5ea6\uff0c\u901a\u5e38\u5728\u6570\u5341\u5fae\u7c73\u7684\u8303\u56f4\u5185\u3002\u8fd9\u79cd\u9ad8\u7cbe\u5ea6\u786e\u4fdd\u4e86\u7535\u5b50\u4ea7\u54c1\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n<h3>3. \u4e3a\u4ec0\u4e48\u8981\u5728\u8d34\u7247\u4e4b\u524d\u6d82\u4e0a\u9521\u818f\u6216\u8d34\u7247\u80f6\uff1f<\/h3>\n<p>\u6d82\u4e0a\u9521\u818f\u6216\u8d34\u7247\u80f6\u53ef\u4ee5\u5e2e\u52a9\u5143\u5668\u4ef6\u7c98\u9644\u5230PCB\u4e0a\uff0c\u5e76\u63d0\u4f9b\u5fc5\u8981\u7684\u8fde\u63a5\u3002\u8fd9\u786e\u4fdd\u4e86\u5143\u5668\u4ef6\u4e0e\u710a\u76d8\u4e4b\u95f4\u7684\u53ef\u9760\u7535\u6c14\u8fde\u63a5\u3002<\/p>\n<h3>4. SMT\u8d34\u7247\u673a\u7684\u81ea\u52a8\u5149\u5b66\u68c0\u6d4b\u7cfb\u7edf\u6709\u4ec0\u4e48\u4f5c\u7528\uff1f<\/h3>\n<p>SMT\u8d34\u7247\u673a\u7684\u81ea\u52a8\u5149\u5b66\u68c0\u6d4b\u7cfb\u7edf\u7528\u4e8e\u68c0\u6d4b\u5143\u5668\u4ef6\u7684\u4f4d\u7f6e\u548c\u65b9\u5411\uff0c\u5e76\u8fdb\u884c\u5bf9\u4f4d\u6821\u6b63\uff0c\u4ee5\u786e\u4fdd\u51c6\u786e\u7684\u8d34\u88c5\u3002<\/p>\n<h3>5. \u5982\u4f55\u9884\u9632PCB\u77ed\u8def\u95ee\u9898\uff1f<\/h3>\n<p>\u9884\u9632PCB\u77ed\u8def\u7684\u65b9\u6cd5\u5305\u62ec\u4ed4\u7ec6\u7684\u8bbe\u8ba1\u548c\u5236\u9020\u8fc7\u7a0b\uff0c\u4ee5\u53ca\u826f\u597d\u7684\u710a\u63a5\u4e60\u60ef\u3002\u786e\u4fdd\u7535\u8def\u677f\u8bbe\u8ba1\u5408\u7406\uff0c\u710a\u63a5\u8d28\u91cf\u9ad8\u662f\u5173\u952e\u3002<\/p>\n<h3>6. \u4e07\u7528\u8868\u67e5\u4e0d\u51fa\u77ed\u8def\u70b9\u600e\u4e48\u529e\uff1f<\/h3>\n<p>\u5f53\u77ed\u8def\u963b\u503c\u5728\u6beb\u6b27\u7ea7\u65f6\uff0c\u4e07\u7528\u8868\u8702\u9e23\u6863\u5206\u8fa8\u529b\u4e0d\u8db3\u3002\u6539\u7528\u6beb\u6b27\u8868\u56db\u7ebf\u6cd5\uff0c\u6216\u8005\u7ed9\u77ed\u8def\u7f51\u7edc\u704c\u5165 1\u20133 A \u6052\u6d41\u540e\u7528\u6beb\u4f0f\u8868\u6cbf\u8d70\u7ebf\u626b\u63cf\uff0c\u7535\u538b\u68af\u5ea6\u7a81\u53d8\u5904\u5373\u6545\u969c\u70b9\uff1b\u4e5f\u53ef\u4ee5\u914d\u5408\u70ed\u6210\u50cf\u76f4\u63a5\u89c2\u5bdf\u53d1\u70ed\u70b9\u3002<\/p>\n<h3>7. BGA \u5e95\u4e0b\u77ed\u8def\u5fc5\u987b\u62c6\u82af\u7247\u5417\uff1f<\/h3>\n<p>\u4e0d\u4e00\u5b9a\u3002\u5148\u7528 X \u5149\u786e\u8ba4\u662f\u9521\u6865\u8fd8\u662f PCB \u5185\u90e8\u7f3a\u9677\u3002\u5982\u679c\u53ea\u662f\u5916\u56f4\u9521\u6865\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u5c40\u90e8\u52a0\u70ed\u91cd\u7194\uff1b\u82e5\u786e\u8ba4\u662f BGA \u4e2d\u5fc3\u533a\u57df\u6216 PCB \u5185\u90e8\u95ee\u9898\uff0c\u53ea\u80fd\u62c6\u4e0b\u91cd\u690d\u7403\uff0c\u4e25\u91cd\u7684\u76f4\u63a5\u62a5\u5e9f\u3002<\/p>\n<h3>8. \u4e3a\u4ec0\u4e48 0\u03a9 \u7535\u963b\u80fd\u5e2e\u5fd9\u5b9a\u4f4d\u77ed\u8def\uff1f<\/h3>\n<p>\u56e0\u4e3a 0\u03a9 \u7535\u963b\u5728\u7535\u8def\u4e0a\u628a\u4e0d\u540c\u82af\u7247\u7684\u7535\u6e90\u57df\u5206\u6210\u4e86\u53ef\u65ad\u5f00\u7684\u6bb5\u843d\u3002\u53d1\u751f\u7535\u6e90-\u5730\u77ed\u8def\u65f6\uff0c\u9010\u4e2a\u62c6\u4e0b 0\u03a9 \u7535\u963b\u5e76\u6d4b\u91cf\uff0c\u963b\u503c\u6062\u590d\u6b63\u5e38\u7684\u90a3\u4e00\u8def\u5c31\u662f\u6545\u969c\u6240\u5728\u57df\uff0c\u5b9a\u4f4d\u7c92\u5ea6\u4ece&#8221;\u6574\u677f&#8221;\u964d\u5230&#8221;\u5355\u4e2a\u82af\u7247&#8221;\u3002<\/p>\n<h3>9. \u77ed\u8def\u4fee\u590d\u540e\u8fd8\u80fd\u6b63\u5e38\u4f7f\u7528\u5417\uff1f<\/h3>\n<p>\u8868\u5c42\u9521\u6865\u3001\u9519\u4ef6\u8fd9\u7c7b\u88c5\u914d\u7f3a\u9677\u4fee\u590d\u540e\u901a\u5e38\u53ef\u4ee5\u6b63\u5e38\u4f7f\u7528\uff0c\u4f46\u5fc5\u987b\u91cd\u65b0\u505a\u5b8c\u6574\u7535\u6d4b\u3002\u5185\u5c42\u77ed\u8def\u3001\u5b54\u94dc\u5f02\u5e38\u3001\u4ecb\u8d28\u51fb\u7a7f\u8fd9\u7c7b\u5236\u9020\u7f3a\u9677\u4e0d\u53ef\u4fee\u3002\u8f66\u8f7d\u3001\u533b\u7597\u7b49\u9ad8\u53ef\u9760\u4ea7\u54c1\u4e00\u822c\u7981\u6b62\u5bf9\u5185\u5c42\u7f3a\u9677\u505a\u4efb\u4f55\u4fee\u8865\u3002<\/p>\n<h3>10. \u70d8\u677f\u4e4b\u540e\u77ed\u8def\u6d88\u5931\u4e86\uff0c\u662f\u4e0d\u662f\u5c31\u6ca1\u4e8b\u4e86\uff1f<\/h3>\n<p>\u4e0d\u662f\u3002\u70d8\u677f\u540e\u6d88\u5931\u8bf4\u660e\u77ed\u8def\u4e0e\u53d7\u6f6e\u6216\u79bb\u5b50\u8fc1\u79fb\u6709\u5173\uff0c\u5c5e\u4e8e\u9690\u60a3\u800c\u975e\u6545\u969c\u89e3\u9664\u3002\u8fd9\u7c7b\u677f\u5728\u540e\u7eed\u670d\u5f79\u4e2d\u6781\u6613\u590d\u53d1\uff0c\u5e94\u4ece\u677f\u6750\uff08\u63d0\u9ad8 CAF \u8010\u53d7\u7b49\u7ea7\uff09\u3001\u9632\u6f6e\u5305\u88c5\u3001\u52a9\u710a\u5242\u6e05\u6d17\u4e09\u4e2a\u65b9\u9762\u627e\u6839\u56e0\u3002<\/p>\n<p><strong>Further Reading<\/strong>\uff1a<a href=\"\/en\/blog\/how-component-shortages-affect-electronic-product-design\/\">\u5143\u5668\u4ef6\u77ed\u7f3a\u5982\u4f55\u5f71\u54cd\u7535\u5b50\u4ea7\u54c1\u8bbe\u8ba1\u4ee5\u53ca\u907f\u514d<\/a> \u00b7 <a href=\"\/en\/blog\/pcb-short-circuit-solutions\/\">Analysis and Solutions for Short Circuits on Printed Circuit Boards<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u5728SMT\u8d34\u7247\u52a0\u5de5PCB\u7684\u5236\u9020\u8fc7\u7a0b\u4e2d\uff0c\u5bb9\u6613\u51fa\u73b0\u7684\u7f3a\u9677\u4e4b\u4e00\u5c31\u662f\u77ed\u8def\u3002 \u4e3a\u907f\u514d\u7535\u8def\u677f\u77ed\u8def\u5f71\u54cd\u6548\u7387\uff0c\u9700\u8981\u68c0\u67e5\u7535\u8def\u677f\u5e76\u53ca [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8787,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"How to Troubleshoot a Short Circuit on a PCB? 5 Methods for Locating Short Circuits","description":"How do you locate a short circuit on a PCB? This guide provides a practical troubleshooting process, covering techniques ranging from using a short-circuit locator, comparing PCB schematics, and isolating sections, to inspecting BGAs and surface-mount capacitors."},"_slim_seo_primary_term_category":0,"_slim_seo_primary_term_post_tag":0,"footnotes":""},"categories":[409,26],"tags":[],"class_list":["post-1516","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-smt-assembly","category-blog"],"_links":{"self":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/1516","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/comments?post=1516"}],"version-history":[{"count":6,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/1516\/revisions"}],"predecessor-version":[{"id":19877,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/1516\/revisions\/19877"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media\/8787"}],"wp:attachment":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media?parent=1516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/categories?post=1516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/tags?post=1516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}