Tag Archives: Multimeter

Steps in Troubleshooting Procedures of the PCB Assembly

An integrated circuit is constructed with the help of a printed circuit board (PCB). Using a PCB is advantageous because you will no longer attach wires to the board-mounted components individually. PCBs have consolidated pathways that can conduct electricity. These pathways are made of copper wires, which are situated at the base.circuit-board

They transmit current among the capacitors, transistors, resistors and diodes. Therefore, printed circuit boards are predominantly appropriate to be used in do-it-yourself circuit assemblies like remote control circuit boards.PCB assembly may be confusing for some people. They may experience problems in assembling the circuit board. Before finalizing the board, it is ideal to troubleshoot the process steps of the PCB assembly. In this way, you are sure that the device will function efficiently.

Materials to be used:
  • Phillips screwdriver
    • Magnifier
    • Multimeter
    • Soldering iron
    • A pair of tweezers

Steps:

I. Test the circuit board components.
  1. Put the multimeter in resistance mode.
  2. Position the multimeter test lead in between of the first two constituents of the circuit board. Usually, the first two components are the ones nearest to the power supply cable, which is linked to the board.
  3. Take note of the meter reading. If the components are fixed, the meter reading should be around 5 percent closer to the specified value. The specified values of PCB assembly constituents are usually written on the side. For instance, a resistor’s value, which is in terms of ohms, is provided on the side of the component. If the meter reading is not within that range, detach the component and replace with another component of the same unit. If the meter reading is zero, then probably, the component is shorted out.
  4. Continue testing other constituents. Mostly, when the previous part is shorted out, the succeeding parts will give you a zero meter reading also.
II. Inspect the circuit board.
  1. Disengage the power supply from the circuit board. If it is powered by a battery, detach the battery and keep the snap wires compacted. If the board is corded, use a soldering iron to melt the circuit’s solder joint, which links the source of power to the circuit board.Circuit Boards
  2. Take off the screws from the circuit enclosure’s base. Screws are usually used in holding the circuit board in position. In this step, you will need the help of a Phillips screwdriver.
  3. Turn the board upside down. In this way, the conductive strip will be uncovered. PCBs must not be laid flat on the table. To avoid damaging PCBs, balance it by putting several books under its edges. This is to prevent the board-mounted parts from touching the desk.
  4. Examine the conductive circuits with the use of a magnifier. Check out if there are some cracks in it. Usually, conductor strips are sliced by a razor prior to PCB assembly. The purpose for doing this is to separate some parts of the board. In this case, if you unintentionally position a constituent in between of the two incisions in the strip, the circuit board will not function. If you find any crack along the conductive pathway, detach all constituents from the circuit board and utilize another board.
  5. Check if the connector leads and conductive cables are properly linked together by solder joints. If solder joints are not properly soldered, the circuit may possibly short out.
III. Eliminate non-functional components.
  1. Using a soldering iron, compress the solder joints and let it cool afterwards.
    2. Using a pair of tweezers, make the leads straight.
    3. Turn the board upside down and remove the components from the board turret. Replace it with a new model.

These are the simplest steps in troubleshooting the procedures of the PCB assembly.

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