The best way to Fix a Laser Pen

Due to the fact semiconductors have turn out to be affordable to produce, laser pens have discovered themselves in the pockets of numerous businesspeople, presenters as well as other professionals. Occasionally issues go awry plus a laser pen stops working appropriately. You will discover a few troubleshooting strategies and approaches to fix the laser pen yourself, outlined below, which will save you the expense of going to a professional to have the pen serviced (or getting a complete new pen).

Directions

Issues You will Will need

* Laser pen
* Spare batteries
* Jeweler's screwdriver, flat head
* Needle nose pliers, two pair
* Multimeter

* 1

Swap the old batteries with new ones. If that doesn't function, check to see that they're facing the best way. Laser pens generally use button cell batteries, which have a huge surface that covers the sides, plus a smaller surface that is only on the face. Whichever component of the laser pen battery compartment that has a spring, may be the direction the smaller surface will need to face.

* two

Disassemble the laser pen by unscrewing the screws. If the batteries are not the difficulty, then there is certainly some thing wrong with the circuit itself.

* 3

Remove the internal circuit board. As soon as all user-removable parts have been removed, use the two pliers to pull the circuit board out. Be cautious not to damage the circuit board with the pliers. Though both are gripped, slowly and carefully rock the circuit board back and forth to loosen it. The 1 thing that may resist removal could be the button situated on the pen for activating the laser. As soon as this is freed, it truly is brief work to get rid of the circuit board.

* 4

Test the components. Be certain that you can find no shorts or cuts within the circuit. If there is certainly a short, it is likely that the semiconductor within the laser is destroyed. If there is certainly a cut, then it should be simple to rewire the circuit to reestablish the electrical path. Need to neither of those prove to be the case, then identify the modest potentiometer. This is actually a component with a screw on it. Use the multimeter to measure the resistance of the pot. Also measure the direction in which the resistance is increased.

* 5

Trim the pot. Turn the potentiometer to its highest resistance, and connect the batteries. Although depressing the laser switch, slowly and cautiously turn the pot to lower resistances. As soon as you see any hint of laser light, stop turning. Then proceed at about 1/10 the speed, to attempt and turn it to the spot of peak brightness. If your laser pen is still not working, then it is most likely broken beyond repair and you can want to replace it.