A printed circuit board is an essential component of an integrated circuit. The main advantage of using a PCB to assemble a circuit is that you do not need to wire each mounted component to the board. PCBs have integrated conductive path strips, generally made of copper on the base, which conduct the current between the various resistors, capacitors, diodes and transistors. For this reason, PCBs are particularly suitable for self-assembly kits, such as guitar pedals. If you are having problems with the PCB assembly process, troubleshoot your job.
- Set your multimeter to “Resistance”.
- Place the meter cable between the first and second components on the Board.The first component is usually the closest one where the power cord is connected to the board.
- Record the weight.If this part is good, the reading will be within a tolerance range of 5% of the advertised value.PCB components usually have the value printed on the side. For example, the resistors have their value in ohms printed on the side. If the reading is outside this tolerance range, remove the part and replace it with an identical one. If the reading is zero, the part is probably short-circuited.
- Test the remaining components in the same way.Note that if a component is shorted, the next component in the plus string will probably give a zero reading too.
- Switch off the power supply.If the circuit is battery powered, remove the battery and leave the snap-in wires of the battery intact.If it is powered, melt the solder joint connecting the power wire to the board.
- Unscrew the fully filled circuit board from the base of the circuit.Circuit boards are usually held in place with platinum screws, claiming a small Phillips screwdriver.
- Place the board face down, so the conduction band is exposed.To avoid damaging the board-mounted components, balance the PCB on the two-pound edge to raise the parts off your workbench.
- Inspect the conductive tracks with a magnifying glass.Look for cracks in conductive tracks.In some circuits, the PCB conductor bands can be cut with a razor before the assembly. It is a question of isolating the parts of the circuit. If this is the case and you inadvertently mount an Office component between two pauses in the tape, the circuit will not work. If you spot a crack in the conductor track, remove all the parts from the card and use a different table.
- Inspect the joint welds the connection connector leads to the conductive tracks.If they are not properly sealed in place, it may short circuit the circuit.
Removing bad components
- Turn on your soldering iron.
- Press the hot end of the iron against the joint solder merging the conduit connector from the component to the conductive path.Wait for the seal to cool.
- Straighten the wires with a pair of tweezers.
- Return the jury and slide the component out of the board turret.By replacing this particular component with a new brand, you can determine with precision whether the Assembly problem is due to a bad part or bad PCB.
Tips and Warnings
- Use insulating tape to mark the wrong elements.