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2 Most Common Problems With Overhead Projectors
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If you own an overhead projector, chances are, there are times when you'll be faced with some technician issues. Knowing how some of these problems come about can often help you diagnose the problem and get it recitified instead of sending it for repairs. So, what are some of the more common issues experienced by owners of the different models of overhead projectors, be it old or new? Read on.
(1) "My overhead projector's lamps kept getting blown, what's up?"
For those of you who aren't aware, overhead projectors nowadays makes use of projection lamps which needs at least 82 volts to work. However, our AC outlet conventionally is 120 volts. A special electric component called the diode or rectifier present within the overhead projector reduces the line voltage to 82 so that it's compatible for the overhead projector to work properly. But when this component is spoilt, the line voltage of 120 is directly transferred through to the 82 volt lamp, causing an overload on the projection lamp and eventually causing it to burn out.
For users with some electronics background, replacing the diode is a pretty straightforward task. Otherwise, getting a professional repair technician to do the job is a much safer bet.
(2) "Help! There's no power to my overhead projector. What can I do about it?"
Most users would think this is a defective lamp socket. But there's more than meets the eye and the following are some steps to help you narrow down the problem :
a) Ensure that the interlock switch is in working order. The interlock switch is a requirement for all UL listed overhead projectors and it basically breaks off power to the projector in the even the top cover or lamp door is opened up, for safety purposes. When this switch is damaged, it may result in a sudden break of power.
b) If the interlock switch is in order, the other possible reason could be the resistor. Now, some of the overhead projectors comes with a resistor and this is often used with the diode to lower the voltage of the power. Alternatively, it can also be used on equipment with the hi and lo lamp feature. When this is damaged, the power may also be broken.
c) If both the resistor and interlock switch are working, then the other possible explanation for the break of power could be the safety thermostat. Its main use is to prevent the overheating of the overhead projector which in turn harms the costly components such as the Fresnel lens. So, in the event the overhead projector overheats, the thermostat will switch off the power. If this is not working, there's a possibility of having no power for your overhead projector.
Although there could be many causes for the loss of power, the above are just some of the possible reasons. Do take heed to leave the fix to a professional repair technician as inappropriate handling may result in some electrical hazards.
(1) "My overhead projector's lamps kept getting blown, what's up?"
For those of you who aren't aware, overhead projectors nowadays makes use of projection lamps which needs at least 82 volts to work. However, our AC outlet conventionally is 120 volts. A special electric component called the diode or rectifier present within the overhead projector reduces the line voltage to 82 so that it's compatible for the overhead projector to work properly. But when this component is spoilt, the line voltage of 120 is directly transferred through to the 82 volt lamp, causing an overload on the projection lamp and eventually causing it to burn out.
For users with some electronics background, replacing the diode is a pretty straightforward task. Otherwise, getting a professional repair technician to do the job is a much safer bet.
(2) "Help! There's no power to my overhead projector. What can I do about it?"
Most users would think this is a defective lamp socket. But there's more than meets the eye and the following are some steps to help you narrow down the problem :
a) Ensure that the interlock switch is in working order. The interlock switch is a requirement for all UL listed overhead projectors and it basically breaks off power to the projector in the even the top cover or lamp door is opened up, for safety purposes. When this switch is damaged, it may result in a sudden break of power.
b) If the interlock switch is in order, the other possible reason could be the resistor. Now, some of the overhead projectors comes with a resistor and this is often used with the diode to lower the voltage of the power. Alternatively, it can also be used on equipment with the hi and lo lamp feature. When this is damaged, the power may also be broken.
c) If both the resistor and interlock switch are working, then the other possible explanation for the break of power could be the safety thermostat. Its main use is to prevent the overheating of the overhead projector which in turn harms the costly components such as the Fresnel lens. So, in the event the overhead projector overheats, the thermostat will switch off the power. If this is not working, there's a possibility of having no power for your overhead projector.
Although there could be many causes for the loss of power, the above are just some of the possible reasons. Do take heed to leave the fix to a professional repair technician as inappropriate handling may result in some electrical hazards.
Author Resource:
James is a part-time writer. Wanna read used portable overhead projectors for sale comparison 50 $ and under such as refurbished second hand used Apollo overhead projectors for sale cheap or refurbished second hand used Dukane overhead projectors for sale cheap? Refer to the links.
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