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Block diagram and working principles of laser printer on fabrics -- for the examination purpose

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Posted on Jan 02, 2017

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SOURCE: working principle of super heterodying receiver

you can find it easy with google, but here is how it works...the incomeing rf signal is mixed with a signal of another frequency from the local oscillator and then passes through a non linear device (semiconductor). after passing through the nonlinear device the output will contain the original frequency,the local oscillator frequency, and frequencies equal to those added together and subtracted from each other,these signals are then passed through filters to obtain only one which will be either the rf frequency plus the local oscillator frequency or the rf frequency minus the local oscillator frequency. This new frequency is then coupled to the intermediate frequency amplifier stages where most of the amplification takes place before the audio is removed and passed to the audio stages.

Posted on Jan 15, 2009

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SOURCE: GARNet was formed for the purpose of identifying and examining the:

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Posted on Sep 01, 2012

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1 Answer

Which model printer is suitable for home purpose inject or laser


Both types of printers are OK for home use.
The color inkjet printers are cheap printers for color printing, the only disadvantage is if they are not used regularly then the nozzles in the print head can become blocked and if the head cleaning process cannot clean the nozzles then the print head needs to be replaced. These print heads are usually expensive to replace.
If you only want to print black documents I would recommend you purchase a laser printer for the best cost per page printing and they can stand long periods of non use.
Color laser printers are now cheaper, but for photo print quality inkjet printer are better especially when they use 6 or more color print cartridges.

Jan 30, 2011 | HP DeskJet 656cvr InkJet Printer

1 Answer

What is drum unit


Hi,

The drum unit transfers the toner into an image onto a drum, which the paper is fed through to pick up.

Some printers have the drum unit integral with the toner cartridges (as in the HP 5L & 6L). Others require you to buy a separate unit (as in the Dell 3100 series).

The more technical description is here:
Initially, the drum is given a total positive charge by the charge corona wire, a wire with an electrical current running through it. (Some printers use a charged roller instead of a corona wire, but the principle is the same.) As the drum revolves, the printer shines a tiny laser beam across the surface to discharge certain points. In this way, the laser "draws" the letters and images to be printed as a pattern of electrical charges -- an electrostatic image. The system can also work with the charges reversed -- that is, a positive electrostatic image on a negative background. Please post your feedback and Vote if the problem resolved as per your satisfaction.

Aug 06, 2010 | Kyocera Mita FS 3800 Laser Printer

1 Answer

Speckled streaks on right margin of paper


image quality issues.
  1. Press and hold the up arrow (uparrow.gif) and down arrow (dnarrow.gif), and then turn on the printer.
  2. Release the arrows when Diagnosing... appears on the operator panel.
  3. Customer Mode should appear on the operator panel.
  4. Press the down arrow (dnarrow.gif) until the LCD displays Test Print.
  5. Press the Select (enter-key.gif) button.
  6. Press the down arrow (dnarrow.gif) until the LCD displays ContaminationChk.
  7. Press Select (enter-key.gif).
  8. The LCD displays Busy while the 3110cn prints the "ContaminationChk" pages.
  9. Examine the test pages to determine if the defect is being duplicated and also which pages are displaying the defect.
  10. If only a specific color page is reproducing the defect, then that color toner cartridge is causing the issue. You can verify this if an identical known good cartridge is available to swap for testing purposes.
  11. If the image defect appears on all color pages, then measure the distance between repetitions of the defect using the ruled edges of the color test pages.
    Good Luck

Mar 21, 2010 | Dell 3010cn Laser Printer

1 Answer

Unable to connect Dell 3000cn to wireless network (cable from printer to Linksys router). Printer shows ICP address, laptops set to share files, but computers do not "see" printer at all. Ideas?


The printer driver needs to be installed and the printer port changed from LPT1 or USB to a TCP/IP port.
Please refer to my tip on Setting up HP network printer. the principles are the same for setting up network printers with a print server.

Dec 02, 2009 | Dell 3000cn Color Laser Printer

1 Answer

Brother HL-4040CN Laser Printer does not feed the paper and stops. I open the paper drawer and the paper will be just above the drawer and I will push back down and close the drawer. Sometimes it will...


i have brother 4040cn printer but its not working any more its showing me no paper load paper in multi purpose tary.
so fi any one there for help me please help me .

thank you

Jan 28, 2009 | Brother HL-4040CN Laser Printer

1 Answer

Working principle of super heterodying receiver


you can find it easy with google, but here is how it works...the incomeing rf signal is mixed with a signal of another frequency from the local oscillator and then passes through a non linear device (semiconductor). after passing through the nonlinear device the output will contain the original frequency,the local oscillator frequency, and frequencies equal to those added together and subtracted from each other,these signals are then passed through filters to obtain only one which will be either the rf frequency plus the local oscillator frequency or the rf frequency minus the local oscillator frequency. This new frequency is then coupled to the intermediate frequency amplifier stages where most of the amplification takes place before the audio is removed and passed to the audio stages.

Jan 13, 2009 | Computers & Internet

1 Answer

CAnon Ir 5020i error E000100-001


No, it's not a fuser problem. It's related to the laser unit. The BD board is the beam detect board and its purpose is to detect the laser beam. The cause could be the laser unit itself, or the laser shutter is not working properly to unblock the laser beam when the front door of the copier is closed. The beam is blocked when the door is open as a safety precaution. The cause could also be mechanical.

Jun 08, 2008 | Office Equipment & Supplies

2 Answers

Title misleading: not a printer at all


Wow you are correct there.
This looks to be a tricky use of words, it is called Multi-purpose not multifunction.
Thats extremely interesting but here is the marketing info.
Sorry you were mislead on that one.

Marketing Information The SF-560 laser facsimile is a multi-purpose office solution that combines the power of Samsung technology, with a combination of faxing, copying, and scanning. The stylish and compact SF-560 is easy to set up to immediately tackle your most demanding office needs.

Dec 20, 2007 | Samsung SF-560 All-In-One Laser Printer

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