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instance, HP 6L laser printer does not print
Failure phenomenon: HP 6L laser printer connected to power its operations after the panel ERROR (error), DATA (data) and READY (ready), after the three lights were lit, and the remaining yellow ERROR (error) indicator lights, printer No response.
Analysis: For the HP 6L laser printer, the boot after the operating panel ERROR (error) indicator light, said: Printer out of paper, cover did not cover, not equipped with drum or a photosensitive drum assembly components in place and the printer is not installed There are cardboard. according to the following steps to check and remove:
Maintenance and troubleshooting process: First, unplug the power cord to the printer, view the back of the printer tray is installed in the printing paper in place, the so-called printing paper in place is to ensure that the front will be located in the bottom of the tray into the paper sensor to suppress by check printing paper is installed correctly; and then open the printer lid and check whether the printer cover closed when the pressure sensor to the cover in place, and the printer drum is in place to install the components, these parts after inspection found no problems; Next, open the printer lid and remove the cover behind the printer, check whether the printer jams, tweezers and gently flip the location of the printer out of paper out of paper detection sensors, to observe the sensor for damage, loss or stuck phenomenon, the results were normal; Finally, remove the back of the printer cover, then check into the paper into the paper sensor two areas for damage or failure to place the phenomenon. The inspection found that a sensor (the sensor Paper round of the components in rubbing below) can not be reset, remove the sensor, it was discovered leveraged plastic deformation sensor arm was stuck by the replacement of the sensor after troubleshooting.
Troubleshooting experience: HP 6L laser printer feed zone there are two sensors detect the paper: the first one in the bottom tray, used to detect whether the printer to print on paper; the second is the paper delivery sensor for detecting printer transmission systems are in working paper. These two sensors are used as check paper photosensitive interrupter sensor, by a plastic lever-type sensor arm and the combination of photosensitive breaker. When the back of the printer tray with paper, printing paper by rubbing roller transmission sent to the sensor position paper, printing paper, press and hold the position of Office of the sensing arm of the upper part of the role of force in the lever, the sensor arm in the lower part did give away photosensitive breaker, breaker photosensitive is through the state, the main control circuit in the printing paper in place to detect the signal, they start to count until the printer out of paper sensor detects areas of paper so far, if within the prescribed time, printing paper does not reach the paper sensor location , the main control circuit according to the paper stored in memory there is no information, identify the printer is jammed, immediately interrupt the main motor running the program, the operation panel on the light will light cardboard. in this case because the photosensitive paper delivery sensor breaker has been in through the state, the main control circuit from the start of work on counting, the counting time and the machine does not match the data stored in memory, determine the printer to jam.
Instance, HP 6L laser printer does not print
Failure phenomenon: HP 6L laser printer connected to power after a while the operation panel ERROR (error), DATA (data) and READY (ready) all three lights on, the printer did not respond.
Analysis: HP 6L turned on the operation panel ERROR (error), DATA (data) and READY (ready) all the three indicator light indicates that the printer hardware error that is: the printer’s fuser component failure or laser heaters component failure. to the printer operator panel on all three indicators light, click the button panel, if the button is pressed DATA (data) lamp, the light is a snapshot release later components heater failure:
Maintenance and troubleshooting process: First, remove the superstructure of the printer; unplug the printer frame to the right of fuser heater plug, plug with a multimeter measuring the resistance value, the measured resistance value of the terminal is about 120 Euro, no problem; Then remove the printer cover, then open the laser components of the superstructure, hand laser scanning mirror rotating central shaft (be careful not to run into mirror), feel the jam clear sense of the scanning motor or control and drive circuit is faulty, with a new scanning motor drive board replacement printer troubleshooting.
Troubleshooting experience: HP 6L laser printer scanner uses a motor-driven scanning mirror. It is a four piece with a positive side as mirror, by the motor drive for high-speed rotating polygonal mirror, which is a 4 mirror and motor assembly as one of the combination. When the laser beam scanning mirror on the four sides, with the high-speed rotating scan mirror scanning reflected light into a line, when the scanning mirror to the next mirror, the reflected light is then left to right-scan line. so scanning mirror is rotated scan line 4. in this case the scan motor jam occurs, causing motor can not operate normally, the beam detection circuit detected the normal scan signal, main control circuit board will determine the printer hardware appears failure to terminate the current procedure, the operation of all indicator light panel.
Three examples, HP 6L laser printer print quality is poor
Failure phenomenon: HP 6L laser printer self-test print, the image background has serious bottom ash and print writing and lighter.
Analysis: There is a print writing is light and heavier bottom ash may be the reason: photosensitive drum in the toner component is close to running out, the primary corona discharge electrode may have been disconnected, and poor contact between the photosensitive drum assembly or no discharge pressure. added to the photosensitive drum roll on the imaging component of the DC voltage is very low, causing the toner is not polarized or polarization is very weak, so the toner can not be properly transferred to the photosensitive drum. and the photosensitive drum pieces of the middle of the photosensitive drum surface film of the optical characteristics of aging, the deterioration of the surface potential.
Maintenance and troubleshooting process: first replace the imaging drum component or components to re-open the powder charge. Then remove the photosensitive drum components, check availability contact the contact component dirt or oxidation, the flexibility of the machine contacts is good, then remove the printer’s floor, check the main control circuit board, there are three high-voltage contact is not toner pollution. then check the main control circuit board DC voltage is normal (can replace a master conditional circuit board to try). The photosensitive drum assembly for the examination revealed the ground contact deformation (right side in the printer, there is a component of the ground the imaging drum’s bottom shell client and the printer connected shrapnel contact), replace the touch point and troubleshooting.
Troubleshooting experience: As the photosensitive drum assembly of ground contact deformation makes the drum component of the ground point connection problem, leading to the primary corona discharge circuit and no failure.
Four examples, HP 6L laser printer to print is not clear
Failure phenomenon: HP 6L laser printer to print self-test print characters clear, but the details do not appear to print fine print Shique clear failure.
Analysis: laser printer has a print is not clear and more common phenomenon, caused by reason of such failure generally: photosensitive drum or toner box of the toner component deficiencies; print media does not meet the specifications required by the printer, such as print media moist or too rough dielectric surface; print laser toner concentration setting improper or failure.
Maintenance and troubleshooting process: First, check and remove the imaging drum components or print media’s fault: Gently shake the photosensitive drum components, so that re-distribution of the toner or replace the imaging drum; then required to re-select the print media; and software or printer driver to adjust the toner density setting. The results have not been able to troubleshoot. Thus, the laser is more likely to fail, according to the following steps to check and remove Laser component failure:
Open the printer cover, remove the laser components, laser components and then remove the metal cover, were examined with a scanning mirror, lenses, mirror, on whether the toner, dust, and if so, with cotton wool dipped in ethanol Gently wipe. Then remove the laser head components (laser head and laser drive circuit board), check the laser focusing lens above the surface of the coating is aging, with or without dust or spots, if dust or spots then gently with cotton wool dipped in absolute alcohol wipe, if the coating should be to replace the aging lens. After the inspection he discovered that the laser focusing lens above the surface of the coating aging, replacement of a new focusing lens and adjust the distance ( The laser head and laser focusing lens had a certain distance, adjust the print will appear improper fuzzy fault), the printer troubleshooting.
Troubleshooting experience: In order to broaden the laser beam modulation frequency, laser equipped with a laser hair out can be focused laser beam focusing lens. When the printer’s ambient temperature and humidity changes, making the lens on the optical coating are aging, or toner and dust pollution in the lens surface, will affect the laser beam transmission, the results appear to print resolution of the printer down the fault.
Five examples, Hewlett-Packard LaserJet 1010 laser printer can not print
Failure phenomenon: HP LaserJet 1010 laser printer for network sharing printers in use, whether to print from the network or from the local print, occasionally can print after 12, you can not print, and sometimes one can not print.
? Font color = \Maintenance and troubleshooting process: remove the original after reinstalling the printer driver, print first two no problem, then still error when printing, change the print signal line does not solve the problem. View the print settings have not found the problem. Finally open the printer the lid, took out the printer cartridge was found inside the drain a lot of toner, cleaned and then print, all normal.
Troubleshooting experience: This failure is due to toner is conductive, the leakage of the toner when printing a single component may cause the printer malfunction caused a temporary short circuit. Therefore, we in Canada when the powder into the cartridge, one must ensure that the selenium drum does not leak powder, 2 to promptly remove the printer toner leakage inside the machine, if the leakage of toner too much removed in time, not only cause the printer does not print, and may even damage the printer board.
Examples of six, HP 1100 laser printer to print no characters
Failure phenomena: HP 1100 laser printer, the implementation of print command to print, but print no characters.
Analysis: This fault is generally not as photosensitive drums rotate, the toner cartridge has run out of printer ink cartridge simply does not mount the machine, sealing tape has not taken off, not open circuit transmission line corona discharge causes. < br />
Maintenance and troubleshooting process: First check the drum part is to open the printer cover, pull out the cartridge to the outer cover, toner cartridges in the printer’s front cover to remove the toner cartridges, toner cartridges have to open the lid, in the open cartridge cover will feel a certain resistance, open the cartridge cover, you can bring cartridge and remove it. inspection found that the sealing tape has been removed, gently shake the cartridge, there are many Mexican feel inside powder, there is no issue of toner used, re-installed photosensitive drum, the boot print observation, drum rotation normal.
Then check some of corona discharge, corona discharge part of the main reasons for high voltage circuit fault occurs the fault and some faults corona.
High-voltage circuit fault occurs there are two main aspects of performance and maintenance:
1. High-voltage circuit fault itself. Such as the oscillation circuit module is damaged, high-voltage pulse transformer high-voltage winding open circuit (high voltage winding diameter smaller, easier to break). To open the machine with a multimeter to directly measure high-pressure high-voltage pulse transformer winding DC resistance and did not open.
2. Contact connection problem. Long use, the printer toner makes high-voltage generator of high voltage output contact with photosensitive drum assembly on the bias point of contact with the poor contact imaging; high voltage generator circuit board drum ground contacts and ground point on the photosensitive drum poor contact, resulting in printing the page all white or all black phenomenon. check is to open the machine, remove the photosensitive drum components, respectively, contact the relevant check whether the printer or the toner dirt , photosensitive drum assembly on whether contact dirt or toner.
Corona Corona main reasons some fault circuit transmission line can not discharge, corona some quite dirty, aging and other reasons. Check corona circuit line was not found with a little isopropyl alcohol, stained with cotton balls clean corona wire , boot prints, failure has not ruled out.
Again disassemble carefully examined and found close to the photosensitive drum of the laser beam channel is paper jammed, causing the laser beam can not be irradiated to the photosensitive drum. After removal of waste paper, troubleshooting.
Seven examples, Hewlett-Packard HP 1100 laser printer to print the script appears white stripes
Failure phenomenon: Print a vertical white stripe script
Analysis: The main reason causing this failure the following two aspects of laser scanning systems are dirt, dirt encountered when the laser is absorbed, can not reach photosensitive drum, thereby causing the occurrence of failure; second turn corona wire-bound printed below the print paper channels will attract dust and scraps of paper, some part of the corona parts become dirty or blocked, thereby preventing transfer of toner from the photosensitive drum to the print paper, resulting in the occurrence of failure.
Maintenance and troubleshooting process: First check the laser scanning system, including whether there is debris blocking access, and clean all mirrors on the dirt, and then boot print, fault still. Then check the transfer corona wire, and found some scraps of paper and toner like dirt, clean with a clean cotton ball after the transfer corona wire, troubleshooting.
Eight instances, Hewlett-Packard HP 1100 laser printer to print issued with bottom ash
Failure phenomenon: Print issued the side of the bottom ash appears.
Analysis: This failure usually is due to uneven distribution of toner inside the cartridge, waste bunker is full of aging or damaged cartridge, laser scanning system failures and other causes.
Maintenance and troubleshooting process: First, replacement of the photosensitive drum, before and after the replacement of its left and right front sway back and forth to drum toner distribution, re-installed, the boot print, did not rule out failure. Then check the laser scanning system, found photosensitive drum position of a mirror above the drift, the mirror position is adjusted after the boot print, troubleshooting.
Nine examples, Hewlett-Packard HP 1100 laser printer to print draft writing underweight
Failure phenomenon: the printed manuscript writing underweight.
Analysis: This fault is usually low due to imaging roller imaging bias was polarized charged ink powder, toner toner box is too small, reducing the sensitivity of photosensitive drum or toner due to poor photographic results.

Maintenance and troubleshooting process: first remove the cartridge, shaking slightly, so that uniform distribution of the remaining toner, and then re-put back in the printer, printing has not been significantly improved, indicating that the toner is not too few, then replace a new cartridge, failure has not ruled out, toner cartridges also cause fatigue or aging can basically rule out the possibility. clean transfer charge corona, because the toner, dust and pollution will make the various scraps of paper corona voltage drop, direct affect print quality, clean the malfunction has not ruled out. and through the software or printer driver settings to re-adjust the toner density, closed economy, appropriate to reduce the resolution of the printer software such as measures to improve the printing results, the results did not succeed.
Re-examination revealed erase light bulb has aged, its brightness is not enough, this erasure is the role of light sensitive surface bulging even bring? 100V of the charge erase lamp bulb replacement after troubleshooting.
Examples 10, HP 2100 laser printer does not print
Failure phenomenon: HP 2100 laser printer connected to power after a while the operation panel ERROR (error), DATA (data) and READY (ready) The three lights on full bright, the printer does not respond.
Analysis: For the HP 2100 laser printer, the boot after the operating panel ERROR (error), DATA (the data in RESTAR button next to the indicator) and READY (ready) all the three indicator light indicates that the printer hardware is faulty, snapshot printers typically components of the heater failure or laser component failure.
Maintenance and troubleshooting process: first unscrew the two screws after the printer cover, remove the rear cover; remove the fuser from the printer chassis components on the two screws and two grounding screw; and then unplug the Fuser Unit items connected with the main control circuit board plug J303 (heater) and J301 (temperature detector) after taking the snapshot components gently; then ends with a multimeter measuring the resistance of ceramic pieces, the result of the resistance value of heating-side infinity, while normal resistance of the end value of 100 Euro. and then stand behind the security check heater resistance is good, so with a new heating and replace ceramic chip, or should replace the insurance resistance. After the treatment, printer troubleshooting .
Examples 11, Hewlett-Packard HP 2100 laser printer to print when stains
Failure phenomenon: Hewlett-Packard HP 2100 laser printer, print to repeat some blotting paper, and close spacing.
Analysis: This is generally the existence of a small roller stain sake.
Maintenance and troubleshooting process: fuser rollers were found to be have stain after stain removal, troubleshooting.
Troubleshooting experience: Roll stained blot, when rotated, will leave a mark. Such as the mark are in close proximity, may be the formation of a small roller, if the far distance, they should check the large number of roll can be measured blot the distance between, and then calculated the following formula causing imprinting roller diameter: Roller diameter: Imprinted distance / 314 you can find specific roll.
Examples 12, Hewlett-Packard HP 2100 laser printer does not feed paper
Failure phenomenon: the printer does not feed paper, and display reports out of paper.
Analysis: this fault in the machinery mainly feed sensors have problems or printer are not positioned properly. The circuits are mainly in the feed sensing control circuit.
Maintenance and troubleshooting process: first check the placement of the normal printer, and then check feed sensor, found scraps of paper feed sensor dirty and get stuck causing the printer can not feed. The dirt and scraps of paper feed sensor removal After a clean re-install the paper meet the HP requirements, the boot print, troubleshooting.
Examples 13, Hewlett-Packard HP 2100 laser printer character exception
Failure phenomenon: garbled characters printed phenomenon.
Analysis: The reasons causing this failure is a loose data cable plug, interface circuit damage, do not select the correct symbol set, font is not loaded into memory or not correctly install the driver.
Maintenance and troubleshooting process: First, disconnect the data cable plug to re-plugged, and fixed with a bond wire or snaps good start printing fault remains. And then replace another printer test interface, the ASIC is not the problem. Then through the printer software setup process, select the correct symbol set, reinstall the font, did not rule out failure. the last re-install the driver, finally solved the fault.
Examples 14, Hewlett-Packard HP 2100 laser printer to print on paper with white
Failure phenomenon: the printer to print black image, irregular white spots appear.
Analysis: The reasons causing this failure: the photosensitive layer of photosensitive drum falling off, scratch, developing bias is too high or toner contains impurities, high charging voltage, discharge ignition, breakdown or semi-breakdown Photographic drum.
Maintenance and troubleshooting process: step by step through the above reasons, it was discovered photosensitive layer peeled off, causing the fault. Replacement drum machine after the test, troubleshooting.
Examples 15, Hewlett-Packard HP 2100 Laser Printer printer error
Failure phenomenon: as a network printer to use, but the print, the printed documentation was incomplete, sometimes even can not complete the first page to print off.
Analysis: One reason for this failure caused the computer poisoning, and second, the printer memory is not enough, three is a problem with print settings.
Maintenance process and troubleshooting: Check the network as usual, with KV3000 for antivirus invalid. Then click on the printer \computers in the CMOS settings normal. Further examination revealed that the failure was due to resolution settings error. In setting the \, enter \Examples 16, Hewlett-Packard HP 2100 laser printer printer preparation process failed
Failure phenomenon: Preheat display lights flashed on after power off, causing the printer preparation process fails, the machine can not work.
Analysis: The main reason caused the failure of the following: thermal switch is damaged, open filament lamp fuser, fuser lamps and lamp seat door poor contact, thermistor, fuser roller and between the foreign body.

Maintenance and troubleshooting process: machine thermal switch was connected to the state when cooled to ensure the laser printer fuser preheating temperature reaches the rated temperature, when the fuser temperature exceeds 160 ℃, the thermal switch is open, to ensure a constant temperature snapshot ; When the fuser temperature is below 160 ℃, the thermal switch to turn on, so in turn the work cycle. The inspection found that thermal switch has been damaged. replace the thermal switch for the same type test machine troubleshooting.
Examples 17, Hewlett-Packard HP 2100 Laser Printer error light Always
Failure phenomenon: After boot, Error error lights.
Analysis: the reason that caused the error lights are: the cover does not cover the printer, toner cartridge is not installed, the paper clip in the machine, the printer is missing print media.
Maintenance and troubleshooting process: first check whether the lid off a good printer, and then re-installed toner cartridges, boot prints, failure does not rule out the possibility. A closer examination revealed the entrance to a jammed printing paper, clear paper jam troubleshooting after .
Examples 18, Hewlett-Packard HP 4050 laser printer can not print
Failure phenomenon: online printing, the printer does not respond.
Analysis: cause of this failure because of the following reasons: power cord, switch and fuse tube with or without poor contact, broken or damaged, the printer’s parallel cable connection is correct, reliable, open the printer top cover and rear cover is with, the printer may be in suspended state, software or printer does not set the correct print port, serial and parallel settings are correct, BIOS in the port mode is set to print, the printer driver is normal, the presence of virus.
Maintenance and troubleshooting process: After the above position, it was discovered that the printer does not set the correct print port. Check the configuration of computer software, select the table, so that it can access the correct printer port.
Examples 19, Hewlett-Packard HP 4050 color laser printer to print Talking about
Symptoms: full-page color prints Talking about there.
Analysis: this fault caused the following reasons: not enough toner ink boxes, toner concentration adjustment too light, the print paper does not meet the requirements as too wet, etc., printer toner models at the provincial, photosensitive drum photosensitive strength is not enough, transfer corona device is not properly installed, high-voltage electrode wire and the fixation phase phenomena such as leakage.
Maintenance and troubleshooting process: First check the toner cartridge, toner sufficient, without changing or adding toner toner cartridges. And then adjust the toner concentration, did not rule out failure. Will transfer corona device is installed correctly, ensure that the transfer voltage adequate and comply with HP requirements to replace the paper, it could not rule out failure. final check print settings, found that the current model state is in a toner to remove provincial toner mode, print back to normal.
Examples 20, Hewlett-Packard HP 4050 laser printer to print all white
Failure phenomenon: print proofs all white.
Analysis: The main reason causing this failure are the following: no toner toner cartridges, optical system is blocked foreign body, not the angle mirror, mirror reflective surface damage or dirt and the aging of the gear shaft does not turn the wheel turn led to the imaging drum, transfer, developing roller toner not to breathe it, scan driver circuit fault, the charge electrode damage, disconnect the connection charge electrode, electrode wire transfer electrode connection is bad or broken.
Maintenance and troubleshooting process: First check the toner cartridge toner sufficient, and installation are correct. Check laser channels nor block the material. Power, remove the toner cartridge. Open the lid of the notch, in the non-photosensitive drum sensitive site for a re-mark into the machine, start running about, and then remove the check mark has been moved to illustrate the imaging drum to rotate. then check imaging rollers, found no ground photosensitive drum, developing roller plus the DC bias is not caused not breathe toner imaging roll. analysis of the reasons is because of the negative charge can not gravitropism discharge, the laser beam can not play a role in the photosensitive drum, causing the fault. will be well-grounded test photosensitive drum machine troubleshooting.
Examples 21, Hewlett-Packard HP 4500 laser printer does not print
Failure phenomenon: when printing the error message \Analysis: This indicated that the printer can not read the configuration file, the printer is not initialized.
Maintenance process and troubleshooting: Check the print server in PCONSOLE installation information, find the printer’s configuration file is corrupted.
Type: pconsole
And select: Print Server Information
Primt Server
Name
Print Server Configuration
Printer Configuration
Removed from the print server of this type of printer, and then re-established, troubleshooting.
Examples 22, HP IIP 4500 laser printer prints half a page blank
Failure phenomenon: prints half a page appears blank.
Analysis: This caused the causes of the following: Print the page is too complex, not suitable for the resolution setting, the memory is not enough.
Maintenance and troubleshooting process: First, the resolution set to 300dpi, the malfunction persists, then check the memory and found that memory. After installing additional memory testing, fault disappears.
Troubleshooting experience: If you have installed additional memory malfunction persists, you should use a specific print medium size, and set the page protection.
Examples 23, Hewlett-Packard HP 5000 laser printer to print a blank
Symptoms: occasional blank page when printing.
Analysis: Failure caused by reasons for this: the length of the paper and margin settings are not correct, the paper difficult to separate with static electricity, so that two or more printers to send more than one paper, software applications which warranted the extra paper. < br />
Maintenance and troubleshooting process: First, set the printing paper and reasonable margins, not troubleshooting. Check printing software configuration and no abnormality was found. In check printing paper, they found difficult to separate the printing paper, remove the paper, in place paper, paper back and forth before the bend into a U-shaped and open, to separate paper, troubleshooting.
Examples 24, Hewlett-Packard HP 5000 laser printer has white bars vertical
Failure phenomenon: prints have vertical white bars.
Analysis: this fault caused the following reasons: a lower supply voltage to charge voltage uneven, uneven distribution of toner and the toner box separation claw deformation, photosensitive drum caused serious scratches can not be transferred, printed toner charging wire electrodes have the corresponding part of the contamination can cause photosensitive drum charge wire transfer electrodes local dirty.
Maintenance and troubleshooting process: First, the normal power supply voltage detection, and then remove the toner cartridge gently shake, so the toner distribution, the print still. And then check the photosensitive drum and the charging electrode wire transfer electrode wire, found transfer electrode wire dirty, so that the voltage transfer significantly reduced. will transfer electrode wire and the surrounding area clean after the test machine troubleshooting.
Examples 25, Hewlett-Packard HP 5000 laser printer to print paper horizontally with black bars white bars
Failure phenomenon: prints horizontal black bars appear on IOUs.
Analysis: this fault caused the following reasons: faulty photosensitive drum, developing roller drive clutch friction or spin, charge transfer and electrode consumption too loose.
Maintenance and troubleshooting process: First, check the photosensitive drum, drum found off-center axis, resulting in uneven speed, causing uneven transfer. The drum shaft to the central position, the boot print, troubleshooting.
Examples 26, Hewlett-Packard HP 5000 laser printer has a black line
Failure phenomenon: prints black lines or black page appears.
Analysis: This failure is usually due to a problem or a printer photosensitive drum due to dirt. Try to replace the new photosensitive drum test machine, printing still on the black page, it shows that the printer needs cleaning.
Maintenance and troubleshooting process: Clean the printer, external dust, toner and paper scraps and other debris, the specific methods are as follows:
1. Clean interior. Laser printers need to clean the internal parts have toner protection, feed rollers, corona wires and vents.
Protection device for cleaning toner: printer cartridge is used for transmission of the pad of paper roller system to absorb excess toner, this part of the most likely dirty. In a clean, it can be removed from the machine with manual way to clean up.
Feed roller cleaning: its role is to drag the paper from the printer’s internal slot in the process, paper, oil stains and dust settling in the drum. Clean the components can use an alcohol soaked cotton group or damp cleaning of these deposits.
Corona wire cleaning: it is used to send a special static wire. Static electricity is used to attract toner to the paper, if there is dust precipitation above will affect the efficiency of static electricity. Cleaning cloth can be used to gently wipe away dust .
Vents: vents will be dust and dirt blocking. Here should be cleaned regularly to maintain the flow of air inside the printer.
2. Clean exterior. Can spray cleaner on a soft cloth, then wipe the casing with it. Can also be exported through the air, blowing fan channel and paper were compressed air tank, to remove dust and dirt.
Examples 27, Hewlett-Packard HP 5000 laser printer does not print
Failure phenomenon: using the network to print, there can not find the network printer tips.
Analysis: This failure may be caused by several reasons: to connect the printer to the computer settings are incorrect, print settings are not correct driver problems.
Maintenance and troubleshooting process: first check the computer to connect the printer to print settings are correct, the result is no problem, and that the printer is shared. Check the remote computer using a network printer on the printer settings are correct. Further inspection, found the printer driver mistakes. in a computer using a network printer to reinstall the correct printer driver again test machine, troubleshooting.
Examples 28, Hewlett-Packard HP 8100 laser printer to print when no response
Failure phenomenon: Send a print job from the software, the printer does not respond.
Analysis: cause of such failure reasons: the power cord and power cord abnormalities, print …

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