How do you troubleshoot a circuit board?

Steps to Fix and Troubleshoot PCBs

  1. Step #1. Clean the PCB.
  2. Step #2. Take off the Damaged Pad.
  3. Step #3. Clear Away Laminate Around the Pad.
  4. Step #4. Remove Old Solder Mask.
  5. Step #5. Clean With Alcohol.
  6. Step #6. Prepare the Conductor.
  7. Step #7. Examine and Choose the Appropriate Circuit Frame.
  8. Step #8.

What are two common problems when troubleshooting a circuit board?

Common Printed Circuit Board Problems

  • Burnt Circuit Board. Table of Contents.
  • Poorly Manufactured Components. Poor manufacturing is another common problem with PCBs.
  • Bad Soldering. Poor soldering can cause many issues in a PCB.
  • Environmental Factors.
  • Age.
  • Plating Voids.
  • Insufficient Copper-to-Edge Clearance.
  • Slivers.

How do you inspect a circuit board?

A typical visual PCB inspection checklist might include the following:

  1. Ensure that the board’s thickness is correct, and check for surface roughness and warpage.
  2. Check the dimensions of the assembly match the specification, and pay particular attention to dimensions related to electric connectors.

How will you identify defects in PCB board?

Strategy to diagnose a faulty PCB

  1. Detection of fault using VI instrument. Unidentified high pin count is tested by alternating voltage.
  2. Second stage is to detect location of the faults.
  3. In third stage new functional components are placed in circuit after removing the faulty components.

What are the fault finding techniques?

What are the six key steps to approach electrical fault finding?

  • Collect the Evidence. All the evidence collected must be relevant to the problem at hand.
  • Analyse the Evidence.
  • Locate the Fault.
  • Determination and Removal of the Cause.
  • Rectification of the Fault.
  • Check the System.

How do you repair a circuit board?

How to Repair Damaged Printed Circuit Board Pads

  1. Step 1: Tidy Up the Damaged Track 1:
  2. Step 2: Tidy Up the Damaged Track 2:
  3. Step 3: Exposing the Track:
  4. Step 4: Sticking Copper Tape Over the Exposed Track:
  5. Step 5: Soldering the Copper Tape Joints:
  6. Step 6: Pierce to Make the Hole:
  7. Step 7: Solder in Your Component:

What causes circuit boards to fail?

Environmental Factors: Exposure to heat, dust and moisture, accidental impact (drops and falls), and power overloads/surges can be causes of circuit board failure. However, the most damaging cause of premature circuit board failure is electrostatic discharge (ESD) at the assembly stage.

What are the three different types of inspection methods?

The Three Types of Quality Inspections There are three primary types of quality inspections: pre-production, in-line, and final. There are a variety of details that must be inspected and approved during each phase in order to detect and correct quality problems.

How do you find the defective component of a circuit?

Instructions

  1. Turn off any power to the circuit before examining the board.
  2. Check the circuit board for fuses.
  3. Examine components on the board for signs of physical damage.
  4. Turn the digital multimeter on and set it to its diode test function.

How do you test a PCB solder?

Evaluating solderability will tell your PCB tester whether or not the attached components, like leads and terminations, can withstand the scorching temperatures that come with soldering….

  1. Dip and Look.
  2. Surface Mount Simulation Test.
  3. Wetting Balance Analysis.

What is the 6 point technique?

finding method The six point fault finding technique has six steps: 1. Test the system, i.e. make measurements or collect other evidence, 2. Analyse the reading, 3. Locate fault based on analysis, 4. Determine the original cause of the fault.

What is the 6 point method?

Observe the system running, if you consider it safe to do so. Use all your senses: smell (burning), hearing (vibration), touch (temperature), sight (for unusual conditions). Refer to any relevant documentation.