Laser projector fault maintenance, how to repair the light source of the laser projector

How to check for hardware failures.

For the soft fault of the computer, it can be solved by analyzing the fault phenomenon, reinstalling the system, replacing the software, modifying the software program, or removing the computer virus. For hard faults, it is necessary to check and eliminate them step by step according to the inspection principle, and the following ten inspection and judgment methods for hard faults are introduced

1.Plugging and unplugging method.

The "plug-in method" is a method of "unplugging" or "plugging" a plug-in to look for faults. For example, if the machine has a "deadlock" phenomenon, this method is used to pull out the plug-in board piece by piece, and if the machine returns to normal, it means that the fault is on the board.

2.Substitution method.

The "replacement method" is to replace the suspected problematic device with the one that has been determined to be the best, and gradually narrow down the search.

3.Comparative Law.

The "comparison method" is to compare the correct characteristics (waveform or voltage) with the characteristics (waveform or voltage) of the faulty machine to see which component's waveform or voltage does not match, and measure it pole-by-pole according to the logic circuit diagram, so that the signal is detected point by point in the direction of the source pursued, and the fault location is determined after analysis.

4.Measurement method.

The "measurement method", also known as the "static measurement method", is an effective method to try to suspend the computer in a specific state, measure the level of each point required with a multimeter according to the logic diagram, and analyze and judge the fault.

5.Heating method.

The "heating method" is a method to artificially raise the ambient temperature and accelerate the "death" of some components with poor high temperature parameters to find faults.

6.Percussion.

The operation of the machine is good or bad, which may be caused by the false soldering or poor contact of the pins of the components and components, or the increase of the resistance of the metal through hole. In this case, it is much easier to use the percussion method to check the circuit board by gently tapping the board with a rubber hammer and then checking it again.

7.Partition method.

The segmentation method is a method of "splitting" the fault, gradually shrinking the board, narrowing it to a certain line, and then to a certain point.

8.Direct observation.

The true observation method is to use human senses to directly observe sparks, abnormal sounds, overheating, scorching and other phenomena to determine the power supply short circuit, overcurrent, overvoltage, loose plug-ins, corrosion damage and other obvious faults.

9.Isolated compression method.

That is, according to the phenomenon of the fault and the hardware parts, some information about the relevant parts is temporarily disconnected or the original data is simplified to reduce the search range.

10.Procedural testing method.

That is, the use of boot self-test program, advanced special diagnostic program to help find the cause of the fault, the diagnostic program in the form of a menu to provide a number of hard drive, floppy drive, CD-ROM, printer and other detection, if the hardware failure, the display of error, sound to obtain the fault point and its cause.

This situation is more in the hardware, you judge is still right, I have encountered this situation before, and finally checked the motherboard, and as a result, several capacitors of the motherboard were broken, just replace a few, very cheap. The diagnostic card can't find out the cause of the crash, it can only find out the hardware in question, I hope it can help you.

The light source of the laser projector is an important part of ensuring its normal operation, and if there is a problem with the light source, the overall performance of the projector will also be reduced. Therefore, for the maintenance of laser projectors, the maintenance of light sources is one of the most important jobs. The following are the precautions for the repair of the laser projector light source.

1.Light source replacement.

When replacing the light source, make sure that the light source used matches the projector, otherwise it will have a negative impact on the brightness and color of the picture. At the same time, when replacing the light source, you need to turn off the projector first and wait for it to cool down for a period of time, so as not to burn the orange pomace itself.

2.Clean the bulb.

If there is dust on the surface of the bulb, you need to wipe it gently with a soft cloth, but do not touch the surface of the bulb with your hands to avoid contaminating the surface of the bulb and affecting its luminous effect. When cleaning, you also need to pay attention to the surface temperature of the bulb, otherwise it may cause the bulb to break.

3.Make sure there is good ventilation.

Laser projectors generate a lot of heat during use, so it is necessary to ensure that there are good ventilation conditions around them to avoid overheating affecting the life and performance of the light source.

4.Regular maintenance.

Regular maintenance is also an important measure to maintain the normal operation of the laser projector light source. Every once in a while, check the surface of the light source and the stability of the bulb, and regularly clean up dust and debris to keep it glowing properly.

In short, there are many aspects that need to be paid attention to when repairing the light source of a laser projector, and it needs to be operated carefully and meticulously. Only by doing this can we ensure the long-term good operation of the laser projector to provide stable and high-quality projection results.

How to use: 1. Install the battery. Three high-performance alkaline batteries are used, and the slag is injected to indicate the polarity during installation.

3. Turn on. Turn on the power right, and at this time, the light is lit up, and the light indicator under the blister lights up at the same time.

4. Operation and matching. According to the actual situation, according to the top of the case to achieve the required combination of light, if you want to align the perpendicular line to a certain position, you can manually rotate the instrument, with fine-tuning, so that the light is accurately aligned with the target, if you want to raise or lower the horizontal line, you can use a tripod to move the position of the horizontal line.

5. Outdoor. If you operate outdoors, the light is not suitable to see, you can use the receiver, press the outdoor on the instrument first, the light-emitting tube will flash under the blister, at this time move the receiver in the distance, if you find the light, the blue light in the middle will be on, at this time a groove on the edge of the beam imitation receiver represents the actual position of the light, such as the red light above, on behalf of the light up, move the receiver upward.

6. Close. When it is turned off, you only need to reverse rotate the locking switch to the OFF state, and the instrument will automatically lock and cut off the power supply.

I used a different charger and the lights didn't come on for a while.

Principles of hardware troubleshooting.

There are usually some clues to a computer malfunction. The following principles should generally be followed for fault inspection and diagnosis:

1.Inspect the external parts first, then the internal components.

If the main unit or display does not light up, you should first check whether the switches, fuses, and sockets outside the machine are open or short-circuited, and then open the chassis or display for inspection after confirming that the external parts are normal. After opening the chassis, first observe whether the plugs and sockets of the system board are skewed, whether the resistors and capacitor pins are touching, whether the surface is burned, whether the chip surface is cracked, and whether the copper foil on the motherboard is burned. It is also necessary to check whether there are any foreign objects falling between the components of the motherboard and causing a short circuit, and you can also look at whether there are any burnt and discolored places on the board, whether the traces (copper foil) on the printed circuit board are broken, and so on.

In addition, pay attention to whether there is a burning smell in the host and board, so as to facilitate the detection of faults and the location of short circuits. At the same time, it is also necessary to monitor whether the working sound of power supply fans, soft hard disk motors or seeking mechanisms, display transformers and other equipment is normal. In addition, when the system is short-circuited, it is often accompanied by abnormal sounds, and the monitoring can find some hidden dangers in time and help take measures in time when the accident occurs.

A laser projector uses a laser beam to form a fan-shaped laser surface through a cylindrical lens or glass rod, and an instrument that projects a horizontal and/or plumb laser line. It is mostly used in decoration and other fields.

Applied Disciplines: Surveying and Mapping (first-level discipline); Surveying and Mapping Instruments (Secondary Discipline).

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When the following problems occur in the product, please deal with them according to the exclusion method first.

4-1.The switch knob is not rotated all the way down.

4-2.Open the case and check whether the copper wire is desoldered. In general, if there is a horn after the battery is put on, and there is no light on, it belongs to this kind of situation.

4-3.Battery box - check whether the wire is broken and whether the spring is in good contact with the battery.

4-4.Test the switch circuit to see if the micro switch is energized, if it is energized, it means that the switch is not problematic, if it is not energized, please replace the micro posture deficit switch.

4-5.The circuit motherboard, the above problems are checked well, then the motherboard has to be replaced.

4-6.The horizontal line of the laser tube is not bright: first check to see if the copper wire is broken, and then see if the lower pair is not lit, if the lower point is not lit, you have to remove the black line on the last line of the wiring board, and the horizontal line is good.