Complete Laser Printer Maintenance Manual
Although there are many models of laser printers, their working principles and materials used are basically the same, but some specifications are different. Therefore, for laser printers, General printer maintenance is basically suitable for all kinds of laser printers, but some special ones are different.
1. Maintenance of electrode wire Because there is residual toner in the printer...
Although there are many models of laser printers, their working principles and materials used are basically the same. It's just that some specifications are different. Therefore, general maintenance of laser printers can basically be suitable for all kinds of laser printers, but some special ones are different.
1. Maintenance of electrode wires
Due to residual toner, dust, paper scraps and other debris in the printer, the charging, transfer, separation and discharge electrode wires will be damaged. Pollution causes the voltage to drop and affects normal working performance. Generally speaking, if the charging or transfer electrode wire is contaminated with waste toner, paper dust, etc., the printed ink will be insufficient or even very light. This is mainly due to insufficient charging of the toner cartridge after the electrode wire is dirty. Therefore, the voltage of the latent image it generates on the toner drum is insufficient and the toner is insufficient. The transfer electrode wire is contaminated and the voltage is insufficient. When the paper passes by, the contact between the paper and the toner drum is not close enough, causing the transfer to the paper. If the toner is not enough, the ink color of the output paper pattern will be too light. In addition, when the transfer electrode wire (slot) is seriously contaminated, the back of the output paper pattern will be dirty, because the paper pattern must pass through the transfer electrode wire slot when output. Contamination of the discharge electrode will cause poor paper separation, causing paper jams and other problems.
Contamination of the discharge electrode will prevent the residual toner on the toner cartridge from being cleaned, causing the output paper sample to be seriously dusty. . When maintaining the electrode wire, you should carefully remove the electrode wire assembly (some printer models do not need to take out the electrode wire, you can clean it directly on the machine), first use a brush to brush off the foreign matter attached to it, and then use absorbent cotton to clean it. Wipe clean gently and carefully.
2. Maintenance of laser scanning system
When the laser and various working mirrors in the laser scanning system are contaminated by dust, etc., it will cause the dust on the printed parts to increase and the image to be unclear. . They can be wiped clean with absorbent cotton, but care should be taken not to change their original position or damage them.
3. Maintenance of the fuser part
The maintenance of the fuser part mainly includes the fuser heating roller (including rubber roller), separation claw, thermistor and thermal switch.
(1) Maintenance of the fuser heating roller
The fuser heating roller may be stuck with a layer of toner after long-term use. Generally speaking, the surface of the heating roller should be very clean. , if it is dirty, it will affect the printing effect. If black blocks or bars appear in the printed sample, and the toner of the graphics and text is stuck to other places, it means that the surface of the heat roller has been damaged or damaged. If it is minor, it can be used after cleaning (but it is not suitable to be used for sulfuric acid paper) ), if it is serious, the only way is to replace the heating roller. The rubber roller paired with the heating roller will also be stained with waste powder after long-term use. Generally, it will not affect the output effect if it is minor, but if it is serious, it will make the back of the output sample dirty. When cleaning the heating roller and rubber roller, wipe them carefully with absorbent cotton dipped in absolute alcohol. However, do not wipe the heating roller too hard, and do not use blades or sharp objects to scrape it to avoid damaging the fusing heating roller. The wiping of the rubber roller can be simpler, just wipe the surface clean.
(2) Maintenance of the separation claw
The separation claw is a small claw close to the heating roller. Its sharp claws are usually in slight contact with the heating roller for a long time, and the back is in contact with the output If the paper pattern is rubbed for a long time, the outer film layer will be rubbed off over time, and the waste powder will be stuck and agglomerated. On the one hand, it will increase the friction with the heating roller and damage the heating roller. On the other hand, the powder will stick to the back. After agglomeration, it becomes not smooth enough, preventing the paper from being transported, causing the paper to become curved and wrinkled when output, affecting the quality, and even causing the paper to be unable to be output and stuck here. Therefore, if you find wrinkles on the output paper, you should clean the separation claw. The method is to carefully remove the separation claw, carefully wipe off the waste powder caked on it, and carefully grind the back smoothly. Generally, do not grind the sharp claws. If you want to grind, be sure to operate carefully. After wiping it clean, you can carefully reinstall it (when installing, each separation claw can be exchanged so that the wear everywhere is similar).
(3) Maintenance of thermistor and thermal switch The thermistor and thermal switch are components close to the heating roller. In early laser printers, they were installed near the center of the heating roller. Later, they were improved. They are installed at both ends of the heating roller. These two parts usually do not require much maintenance, but in printers that have been used for a long time (large output), waste will stick to the thermistor shell (outer packaging). Powder and some dirt will affect its temperature sensing, causing its temperature sensing of the heating roller to change, thereby increasing the surface temperature of the heating roller. This will first affect the life of the heating roller and accelerate the aging and separation of the rubber roller. The wear of claws and other components will increase the preheating time, thereby reducing the service life of the fuser lamp. Secondly, if the temperature is too high, the paper will curl, which will affect the output, cause paper jams, and sometimes even cause sulfuric acid paper, coated paper, etc. to bubble and become unusable. In severe cases, the heating roller may even be burned out.
The maintenance method is to carefully disassemble the fuser, take off the thermistor and thermal switch, use cotton dipped in some alcohol to wipe the dirt on its casing. Be careful not to damage the casing during operation. Then carefully install it back. When installing, be sure to pay attention to the distance between the thermistor and the heat roller to avoid excessive temperature damage to components. Generally speaking, the thermistor should be in contact with the heating roller as close as possible, and the thermal switch can be kept some distance away.
4. Maintenance of photoelectric sensor
Contamination of the photoelectric sensor will cause printer detection failure. If the manual paper feed sensor is contaminated, the printer control system cannot detect the signal of paper presence or absence, and the manual paper feed function will be disabled. Therefore, the relevant sensor surfaces should be wiped clean with absorbent cotton to keep them clean and always have sensing sensitivity.
5. Maintenance of toner cartridges
The toner cartridge of the laser printer is made of silicone photoconductor, which has the problem of work fatigue. Therefore, the continuous working time should not be too long. If the output is large, You can stop and take a break after working for a period of time before continuing to output. Some users use two compacts to work alternately, which is also a method. As for the maintenance of the toner cartridge, it can generally be carried out as follows:
(1) Carefully remove the toner cartridge assembly and wipe the surface clean with absorbent cotton, but do not use force to prevent the surface of the toner cartridge from being scratched.
(2) Wipe the surface of the toner cartridge with absorbent cotton dipped in special toner cartridge cleaner. Use a spiral circular motion when wiping, and wipe clean with absorbent cotton immediately after polishing.
(3) Use gauze filled with talc powder to gently pat a layer of talc powder on the surface of the drum, and then put it back into use.
(4) When replacing toner, pay attention to cleaning the waste toner in the waste toner collection bin to avoid affecting the output effect. Because when too much waste powder accumulates, the phenomenon of "powder leakage" will first appear, that is, irregular black spots and black blocks will appear on the output sample (usually in the vertical direction). If you continue to use it without removing it, it will appear after a period of time. There will be severe dusting (and vertical scratches) at the "powder leakage" area. The reason for this failure is that the waste toner is initially too full, so that the regenerated waste powder cannot enter the waste toner bin, and the waste toner in the waste toner bin will continue to be "squeezed out" to cause "powder leakage". Then, because the waste toner contains paper dust, fiber and other dirt, it is rough and rubs against the toner drum for a long time, and becomes tighter and tighter, with increasing pressure. Eventually, the photosensitive film on the surface of the toner drum is worn away, and the toner drum becomes damaged. damaged. Therefore, the output paper samples have a serious background dust. Since they have been rubbed longitudinally, longitudinal scratches can be seen in the background dust. Therefore, when you find "leakage" of output, clean the waste toner bin immediately. Finally, it should be noted that when cleaning the toner cartridge, try to avoid light.
6. Maintenance of the sensor strip and the transmitter lock plate
Use a soft cloth slightly dipped in water to remove the paper dust accumulated on the silver-white strip and the transmitter lock plate. Wipe clean any foreign matter to ensure smooth transmission.
7. Maintenance of the paper feed guide plate
The paper feed guide plate is located under the toner cartridge, and its function is to transport the paper to the fixing assembly through the toner cartridge. When cleaning, use a soft cloth slightly dipped in clean water to wipe the surface of the paper feed guide clean to ensure that the printouts are clear and clean.
Inkjet printer maintenance:
1. Keep the printer in a clean working environment, including the printed paper, to avoid clogging caused by impurity particles in the environment or on the printing paper. head.
2. Once the ink cartridge is installed, do not remove it from the printer and reinstall it before you are sure to replace it, because removing the ink cartridge from the printer will allow air to enter the ink cartridge. Ink outlet, after reinstallation, this part of the air will be sucked into the print head, causing the printer to appear blank and causing fatal damage to the print head.
3. Be sure to shut down the machine first and then cut off the power, because any power outage, whether man-made or not, is abnormal and will have a serious impact on the life of the printer. In the event of an abnormal power outage, please return the print head to the standby position in time to avoid permanent damage caused by drying of the print head nozzle holes and clogging.
4. The ink cartridge must be replaced according to the procedures specified in the "User Manual". Any ink cartridge replacement operation that violates the prescribed procedures will not only cause damage to the mechanical parts of the printer. It will also cause the printer to be unable to properly identify old and new ink cartridges, causing the printer to not work properly and affecting the printing effect.
5. After the old ink cartridge is used up and removed from the printer, it should be replaced with a new one immediately. Otherwise, if the printer is exposed to the air for too long, the print head will dry up and cause irreparable damage. damage.
If an abnormal situation occurs, please do not let the printer continue to work. If the problem cannot be solved by following the normal processing methods, please find relevant professionals to deal with it.
Top 14 tips for maintaining dot matrix printers
Although the share of dot matrix printers on the market is declining and the share of inkjet and laser printers is rising sharply, due to the The structure of the printer is simple and durable, suitable for high-intensity printing, and its low price, as well as its special uses and unique functions, are favored by the majority of computer users, especially in special industries. It is used in banking, securities, insurance, commerce, transportation, taxation and other industries. Has a wide range of applications. Like other printers, dot matrix printers also require proper care and maintenance.
1. The printer must be placed in a stable, clean, moisture-proof, and acid-alkali-free working environment, and should be kept away from heat sources, shock sources, and direct sunlight. The normal operating temperature range of dot matrix printers is 10°C to 35°C (temperature changes will cause large changes in electrical parameters), and the normal humidity range is 30% to 80%.
2. Keep it clean. Regularly use a small brush or vacuum cleaner to clean dust and paper scraps inside the machine. Always use a soft cloth soaked in diluted neutral detergent (try not to use organic solvents such as alcohol) to wipe the printer case to ensure good cleanliness. Spend.
3. Do not place other objects on the printer, especially metal objects such as pins, paper clips, etc., to avoid foreign objects falling into the dot matrix printer and causing damage to internal components or circuit boards.
4. The length of the dot matrix printer parallel interface cable cannot exceed 2 meters. All interface connector plugs must not be plugged or unplugged while the power is on, to avoid burning out the interface components between the printer and the host. Be sure to turn off the power to the host and printer when plugging or unplugging, and do not let the printer work continuously for a long time.
5. Regularly check the printer's mechanical device to see if any screws are loose or falling off, and whether the carriage guide rail bushings are worn. Check whether the paper feeding mechanism, character carriage and ribbon transmission mechanism operate flexibly. If they are loose, loose or inflexible, they should be tightened, replaced or adjusted respectively.
6. Use the paper feed, paper eject, skip line, page skip and other buttons on the operation panel correctly, and try not to rotate the handle with your hands. If you find difficulty in paper feeding or trolley operation, do not force the machine to work to avoid damaging the circuit and mechanical parts.
7. Check whether the ribbon protection sheet in front of the print head is damaged? If it is damaged, the printing needle will scratch the ribbon or paper during the printing process, and the printing needle will eventually hang up. It should be replaced in time.
8. The position of the print head should be adjusted in time according to the thickness of the paper. When printing, generally do not pull out paper. Because the printing needle is likely to be scratched when the paper is pulled out, causing unnecessary losses.
9. When the dot matrix printer is working, the surface temperature of the print head is relatively high. Do not touch the surface of the print head with your hands. Do not put your hands into the printer to avoid hindering the movement of the carriage or even damaging some parts.
10. To ensure the safety of the printer and people, the power cord must have a good grounding device, otherwise there will be an AC voltage of more than 100 volts on the rack and logic ground. The power supply of the dot matrix printer should use AC220±10%, 50Hz two-phase three-wire neutral power. In particular, good grounding must be ensured to prevent static electricity accumulation and lightning strikes from burning the printing communication port.
11. Choose high-quality ribbons. The ribbon is made of a ribbon base and ink. The high-quality ribbon base has no obvious joints. The joints are treated with ultrasonic welding process and the ink is even. However, the low-quality ribbon base has Obvious double layer joints, poor ink quality.
12. Regularly check the ribbon and ribbon cassette. If the ribbon cassette is found to be too tight or the surface of the ribbon is fluffed, replace it in time (pay attention to the quality of the ribbon). Otherwise, the ribbon cassette will be too tight. It affects the movement of the character carriage, and if the ribbon is damaged, the printing needle will be hung up.
13. Printer idling should be minimized. In actual work, many users often turn on the host computer and then turn on the printer, which wastes power and reduces the life of the printer. Therefore, it is best for users to turn on the printer when they need to print.
14. Try to avoid printing on wax paper. Because the paraffin on the wax paper will react chemically with the rubber on the printing roller, causing the rubber to expand and deform. In addition, paraffin will also enter the printing needle guide hole, which may easily cause the needle to break.
Copy machine maintenance
The copier needs to be maintained after a certain number of copies are made, or when the quality of the copies drops significantly. Only with timely repairs and maintenance can the machine be less likely to be damaged and maintain satisfactory copying results.
Common sense about the use of copiers
Everyone should also pay attention to the fact that the correct daily use method is particularly important.
1. Choose a suitable location to install the copy, and pay attention to preventing high temperature, dust, shock, and direct sunlight. At the same time, ensure a good ventilation environment, because the copy machine will produce trace amounts of ozone, and the operator will You should go outside for a breather and rest every time you work for a period of time. Try to minimize moving at ordinary times. If you want to move, you must move it horizontally and not tilted. To ensure optimal operation, at least 90 centimeters should be left on the left and right sides of the machine, and 13 centimeters on the back (if the machine is connected to a sorter, a distance of approximately 23 centimeters is required). The copier should be operated and used with caution.
2. A stable AC power connection should be used, and the power supply rating should be: 220-240V, 50Hz, 15A.
3. After going to work every morning, turn on the copier and preheat it for about half an hour to keep the inside of the copier dry.
4. Keep the glass plate of the copier clean and free of scratches, correction fluid, fingerprints and other spots, otherwise it will affect the copying effect. If there are spots, use a soft glass cleaner to clean the glass.
5. When the copier is working, be sure to cover the upper cover to reduce eye irritation from strong light.
6. If you need to copy books and other documents that need to be bound, please choose a copier with the "split scan feature" function. This eliminates copy shadows caused by uneven binding.
7. If the background of your copy has a shadow, dust may have entered the lens of your copier. At this point, you need to have your copier professionally cleaned.
8. When the copier panel displays the red toner adding signal, the user should add toner to the copier in time. Failure to add toner in time may cause the copier to malfunction or generate toner impact noise. When adding toner, shake the toner loose and follow the instructions. Do not use substitute powder (fake powder), otherwise it will cause problems such as flying powder, large dust bottom, shorten the service life of the carrier, etc. Moreover, due to the high waste powder rate it generates, the actual copy volume is less than 2/3 of the real powder. .
9. Before adding copy paper, check whether the paper is dry and clean, then straighten the stack of copy paper back and forth and put it into a paper tray with the same paper size and specifications. The paper in the paper tray cannot exceed the thickness allowed by the copier. Please consult the manual to determine the thickness range. In order to keep the paper dry, you can place a box of desiccant in the paper box of the copier. After using the copy paper every day, wrap the copy paper and place it in a dry cabinet.
10. After each use of the copier, be sure to wash your hands in time to eliminate the harm caused to the human body by residual dust on your hands.
11. Turn off the power switch of the copier and cut off the power supply when leaving work. Do not pull or plug in the power plug without turning off the machine, as this may easily cause machine failure.
12. If the following situation occurs, please turn off the power immediately and call for maintenance personnel. A. There is an abnormal sound in the machine; B. The outer shell of the machine becomes overheated; C. Parts of the machine are damaged; D. The machine is exposed to rain or water enters the inside of the machine.
Daily maintenance of the copier
The copier is a precision product that integrates high-tech optics, machinery, circuits, etc. Regular cleaning, sorting, refueling, and adjustment are the keys to ensuring the normal operation of the copier. . Necessary maintenance can improve the working quality of the copier, extend its service life, and save maintenance costs.
During the operation of the copier, its optical system, mechanical system, and circuit system, in addition to normal wear and tear, are also damaged by dust and other debris from inside and outside the copier, causing the copy quality to deteriorate. poor performance and operational failure. Maintenance is mainly to clean or make partial adjustments to the optical, developing, charging, transfer, separation, discharge electrode fixing, transfer and other components of the copier, as well as the toner recovery and other systems. Usually, debris in the optical system will cause heavy gray background and black spots on the copies, and debris in the mechanical system will cause paper jams, smudges on the copies, and other problems. Therefore, in daily work, we must pay attention to the cleaning and maintenance of the copier. Usually, users can do the following work:
1. Cleaning of the cover
Due to contact with various originals and being touched by hands, the white plastic lining or conveyor belt will turn black. This causes black smudges to appear on the corners of the copy. Use cotton gauze dipped in some detergent to wipe repeatedly, then wipe with clean water, and then wipe dry. Note: Do not wipe with alcohol, ether and other organic solvents.
2. Cleaning of the platen glass
Since the platen glass is easily stained by manuscripts and hands, and is also easily scratched, it should be cleaned and maintained regularly to ensure good quality. copy effect. When working, avoid direct contact with the manuscript plate glass with your hands. If it is bound, remove pins, paper clips, staples, etc. from the manuscript and place them in the designated location. The corrected original must wait until the correction fluid dries before copying it. When cleaning the platen glass, avoid wiping it with organic solvents. Because the platen glass is coated with light-transmitting coatings and conductive coatings, these coatings are insoluble in water but soluble in organic substances.
3. Circuit system
Because the circuit system works under high pressure for a long time, it absorbs a large amount of dust, which causes the resistivity between electronic components to decrease and causes current to breakdown the electronic components. , burn the circuit board. The cleaning work of the following parts should be carried out by professional technicians: cleaning of the optical system, cleaning of the mechanical system, cleaning of the paper feeding system, and cleaning of the paper output system.
4. Remove used ink cartridges
Carefully remove used ink cartridges to prevent too much toner from filling the air and being inhaled by the human body.
5. Replace parts
After copying to a certain number of sheets, the consumable parts of the copier (such as: cleaning blade, electrode wire, separation claw (piece), paper pickup Wheels, etc. (these parts are not provided free of charge during the warranty period)) may require necessary replacement due to wear and tear. Such expenditures for repairs and spare parts are normal and should not be considered to be a quality problem with the equipment.
Copy machine maintenance knowledge
1. Main criteria for electrostatic copiers to be in good technical condition
(1) The drive system must be easy to start, run smoothly, and have no abnormal noises , should not be overheated.
(2) Optical system Whether it is a desktop or fixed electrostatic copier, there are strict requirements for the lens, reflective lens and light source of the optical system. The lens is required to be clean. In addition to keeping the reflective lens clean, do not move or change its position casually to avoid affecting the incident angle and reflection angle values.
The light source must be clean, and there should be no obstacles that block the light, block the light path, and affect normal operations such as exposure, charging, transfer, and power consumption.
(3) The copy machine must be faithful to the original. Whether the copy is faithful to the original can reflect the performance and working condition of the electrostatic copier. Judging the performance of an electrostatic copier is mainly based on the blackness value, background gray size, contrast, resolution, layering, etc. of the copy. Blackness refers to the optical reflection density of the black area of ??the copy. The smaller the value, the better the electrostatic copier is. Resolution refers to the number of line pairs contained per millimeter that can be clearly distinguished on the copy. The greater the number of line pairs contained, the better the performance of the xerographic copier. The sense of layering refers to the copying effect of the copy on the gray scale on the test board. The richer the layering, the better the performance of the electrostatic copier.
2. Maintenance after 3,000 copies
Take out the waste toner box, pour out the waste toner, clean the box and put it into the machine, then pull out each electrode, wipe the electrode wire, Grid wire and electrode frame; clean the upper and lower guide sheets, separation roller and separation belt at the bottom of the developer; finally clean the platen glass.
3. Before performing maintenance on 10,000 copies, perform maintenance on 3,000 copies first. Take out the developer, remove the dust-proof plate on the developer roller, check the surface of the developer roller, if there is any abnormality, deal with it; wipe the cardboard at the paper inlet. Remove the fuser guard and replace the fuser cleaning felt and the upper and lower separation claws. Remove the toner and grease deposited on the lower part of the fuser, then disassemble the lower surface of the original glass and clean it. Take out the toner cartridge and wipe it with lens tissue.
4. Maintenance after 50,000 copies
(1) Maintenance after 10,000 copies
(2) Clean the optical system
① Scanner cleaning. The scanner is driven by the scanning transmission mechanism. If the guide rail of the scanner is too dirty, it will increase the scanning resistance. Therefore, the scanner should be cleaned and lubricated regularly. Remove the original glass, clean the guide rail, wipe it several times, and then add a small amount of engine oil to the linoleum of the guide rail. Push the scanner back and forth several times by hand to form a thin oil film on the surface of the guide rail. Check whether the scanner encounters resistance during movement and whether there are any abnormal sounds. After the work is completed, you can remove the dust in the scanning area. eliminate.
② Cleaning of reflectors, reflectors and lenses. Excessive dust accumulated on the reflector, reflector and lens will hinder the transmission of light and affect the copy quality. The cleaning method is as follows: open the original plate cover, remove the original plate glass, put a reflector in the middle position, and then wipe it with lens paper. Do not use too much force and do not wipe back and forth. If there are stains on the reflector that cannot be wiped off, it can be cleaned with glass cleaner. It can only be cleaned in one direction. Use the same method to clean other reflectors. The fourth reflector is inside the camera obscura and can be seen by opening the cover. Clean the reflector in the same way as above.
③Clean the sealing glass. Because through the reflector, the light from the lens to the toner cartridge also passes through the sealed glass. When there is dust on it, dust will also appear on the copy, affecting the quality of the copy.
(3) Check the scraper
Remove the toner cartridge cleaner, check the scraper, and replace it if it is damaged. The replaced scraper should be coated with a little toner on the cutting edge. Finally, check the platen driving steel wire. If it is twisted or damaged, replace it.
6. Precautions for maintenance
① During maintenance, the main power switch of the copier should be turned off and the power plug should be unplugged to avoid short circuiting the electrostatic copier due to contact with metal tools.
② When using various solvents, you should strictly follow the requirements. Parts that are not corrosion-resistant must not be cleaned with solvents. Open flames should be avoided when using.
③ After wiping some insulating parts with alcohol, etc., be sure to wait until the liquid evaporates completely before installing them on the copier, otherwise they will age.
④ When using lubricating oil, follow the instructions. Generally, plastic and rubber parts must not be lubricated, otherwise they will age.
⑤When disassembling a certain component, pay attention to the order of disassembly. When there are many parts, you can record them to prevent forgetting. Especially washers, springs, bearings, etc., should be installed in the reverse order.
⑥The screws used inside and outside the machine are easily confused and should be placed separately after removal to avoid screwing them up and causing damage.
⑦ When disassembling the inner drive chain, belt, and gear, you should remember their direction. Generally, you can draw them on paper before disassembling them to avoid incorrect installation and damage to the parts.