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Case Analysis: smart repair common failures laser printer - printer, laser printer, Hewlett-Packard - Printing Industry
Phenomenon of a fault A Hewlett-Packard HP LaserJet 1010 Laser Printer Used for a period of time, on-line Print When feeding normally, but print without writing.
Analysis and Maintenance: We know that Hewlett-Packard HP LaserJet1010 laser printer is an HP exclusive use of device transient hot-melt technology, up to 12ppm (A4, letter) print speed; application of HP Resolution Enhancement technology (REt), resolution up to 600dpi; 5,000 pages per month duty cycle, 8MBRAM's flagship product, in today's government organizations, medium and large enterprises, financial and securities services industry and other fields are all in a certain proportion.
Here, the author under the fault situation, start the computer and its peripherals (eg printer cable, printer port connection cards, electrical outlets, etc.) check the hardware part of the normal start; without exception, you can troubleshoot a computer and its initial peripheral hardware failure, it sure is a fault in HP laser printer itself. Print writing nothing can be ruled out one by one, follow these steps:
1, the first replacement of the cartridge to see whether the fault disappears. Replacement should first check whether the toner seal Pull out the toner is already used up. Should the seal is not pulled out or toner has run out, no writing will result in the phenomenon; However, if the toner cartridge used in the fault phenomena is the middle part of the vertical output proofs at first gradually pale, red lights stop flashing alarm, indicating the machine in the toner cartridge is running low. Print writing no rare phenomenon, and to be in the image fades after a long period of time after, so the basic rule out the toner cartridge in without reason.
2, then check whether the fault HP laser printer cartridges. Careful examination revealed a text cartridge toner surface traces, so no trouble determining printer imaging component, the problem lies in writing a piece of paper from the transfer of toner to the photosensitive drum stage.
3, the final check on the transfer electrode assembly of the electrode wire, was found not fuse wire electrode off, but left before and after the electrode wire attached to a large number of black powder leakage, and thus determine the fault from causing a large number of charged powder leakage electrode wire can not happen to normal corona discharge, or corona discharge voltage is too low, you can not take negative sign of the toner attracted to the paper, resulting in the phenomenon of printing paper without writing.
Solution is to clean with a small group of cotton dipped in a small amount of methyl ethyl ketone, gently wipe the off state, clear the transfer electrode assembly of the electrode wire around the toner. After cleaning up, and then a small group of cotton dipped in a small amount of ethanol to re-clean it again, so the alcohol evaporates after a clean re-install in place. Power use, print text normal fault immediately ruled out.
Fault phenomena II A Epson Epson laser printer, turned on their own when the running time was significantly longer detected, after the show "MOB5", the green light all off, on-line does not print.
Analysis and repair: Power to self-test operation, show that the mechanical part of the normal laser printer. After power failure, in turn open the cabinet check toner cartridges, toner, and no any exception. According to self-test operation after boot time is too long to judge the failure phenomenon may be related to the initial paper road failures. There is no ready-made aircraft due to the hands of circuit diagram and related information, can only experience with the previous one by one to examine the maintenance of laser printers physical map, one by one examination, we found only one circuit sensor machine, remove the sensor with a multimeter ohm range measuring, action and found that the sensor resistance when the action is not unstable, thus causing printer to determine sensor is the reason for not working properly. Very difficult to buy because the market for such
the same type of sensor can only be restored is appropriate. Carefully open the sensor, found that access to components for use within the action takes too long there has been serious oxidation of green rust. First with a tool to carefully scrape the surface oxide layer knife, then pour a little absolute alcohol repeatedly washed several times, remove and dry with a hair dryer at low temperature slowly, then stood assembly in place (because of their size only a few millimeters, the assembly process to very careful to avoid damage and loss of spring lock hook). Finally the sensor into a laser printer after a reboot test run, online print normal troubleshooting.
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