Ways to Fix a Laser Pen

Because semiconductors have become inexpensive to generate, laser pens have located themselves in the pockets of numerous businesspeople, presenters along with other experts. From time to time issues go awry and a laser pen stops working correctly. There are actually a number of troubleshooting tactics and methods to fix the laser pen your self, outlined below, which will save you the expense of going to a professional to have the pen serviced (or purchasing a whole new pen).

Instructions

Things 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 does not work, check to see that they're facing the proper way. Laser pens commonly use button cell batteries, which have a significant surface that covers the sides, as well as a little surface that's only on the face. Whichever part of the laser pen battery compartment that has a spring, will be the direction the smaller surface ought to face.

* two

Disassemble the laser pen by unscrewing the screws. If the batteries aren't the situation, then there is some thing wrong using the circuit itself.

* three

Remove the internal circuit board. Once all user-removable parts have been removed, use the two pliers to pull the circuit board out. Be careful not to harm the circuit board using the pliers. Though both are gripped, slowly and cautiously rock the circuit board back and forth to loosen it. The 1 thing that can resist removal is the button located on the pen for activating the laser. Once this is freed, it's brief function to get rid of the circuit board.

* 4

Test the components. Be certain that there are no shorts or cuts inside the circuit. If there is certainly a short, it is most likely that the semiconductor within the laser is destroyed. If there is a cut, then it will need to be easy to rewire the circuit to reestablish the electrical path. Will need to neither of those prove to be the case, then identify the small potentiometer. This is really a component having 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 try and turn it to the spot of peak brightness. If your laser pen is nonetheless not working, then it can be most likely broken beyond repair and you are going to need to replace it.