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What is a Print Spooler

A print spooler is a type of software that manages printing jobs that an electronic printer produces. Print spoolers are often used in industrial and commercial applications in order to place printing jobs in a specific priority level, depending on the time stamp of each job. They are usually used in situations that involve mass printing or printing by many different users. Print spoolers also alert users when their material has been printed, assign jobs to differentprinters so that multiple materials may be printed simultaneously, automatically select stationary, etc.

How Print Spoolers Work
Print spoolers work by placing printing jobs in a separate area of a hard drive so that they may be processed separately from the application they came from. This removes the burden of processing from the original application and allows it to continue processing other tasks without waiting on the printing job to be completed. For example, if a user prints a document from MS Word, thecomputer’s print spooler automatically separates the printing job from other MS Word tasks and processes it at its own rate. Without a print spooler, the user would not be able to use MS Word or other system resources until the printing job is complete. While this may not interrupt use for an individual user who is only processing one printing job, it can cause entire offices to be temporarily disabled during larger tasks, such as payroll printing.

Applications
Print spoolers are found on personal computers and remove the burden of printing from word processors, photo editors, and other programs. They are also used on commercial computer systems in order to allow all computers in an office to keep processing other tasks while large printing jobs are carried out on a separate hard drive or server. Print spoolers are used in office computers to assign individuals printing jobs to different printers on the same network. This allows the printing job to be completed in much less time and lowers the stress on the resources of each individual computer.

Advantages
Print spoolers allow users to continue what they were doing while a printing job is being processed. Additionally, print spoolers may include features that notify the user about completed tasks or distributing the workload among several devices. Print spoolers are widely available and free versions can usually be found on the Internet or included with printing hardware.
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Canon mp150 reset codes

MP150/MP160 ERROR CODE
E9 The connected digital camera / video camera does not support Camera
Direct Printing
E14 The Ink cartridges whose destination are wrong
E15 Ink cartridge is not installed E16 - Ink remaining is unknown
E16 -E19 Failed to scan head alignment sheet
E22 Carriage error
E23 Paper feed error
E24 Purge unit error
E25 ASF(cam) sensor error
E26 Internal temperature rise error
E27 Waste ink absorber full or platen waste ink absorber full

E28 Ink cartridge temperature rise error -
E29 EEPRsaya error
E33 Paper feed position error
E35 15 USB Host VBUD overcurrent error - USB
E37 17 Abnormal motor driver error
E40 20 Other hardware error
E42 22 Scanner error
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How to Resetting the maintenance count LaserJet 9040 9050 Series Printer

1. Turn the printer off.
2. Turn the printer back on and wait for the memory count, when the printer starts counting memory press the checkmark (Select) button.
3. Continue to hold down the checkmark button until all of the control panel LEDs are illuminated, then release the checkmark button.
4. When the checkmark button is released, "Select Language" will appear on the control panel.
5. Use the Up Arrow to scroll to NEW MAINTENANCE KIT .
6. Press the checkmark button.
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Reset Epson T50 and T60 without error 21000068

Get an error 21000068 when resetting your Epson T50 or Epson T60 and not see  any solution to prevent the problem. Why not try this tips, but reset this method not recommended for beginner user and you must understand what you are doing. These tips from Jagdish Rathore (India) and I have been granted permission to publish on this blog. He also has been publishing this reset method on his blog on: http://www.epsonservice.blog.com/. If you do not have any knowledge about PCB and electronics, I recommend don’t try this reset methode.
Here the reset method from Jagdish Rathore:
  1. Turn off printer and open printer.
  2. Open your Epson main PCB board.  You can view an 8 pin CMOS IC.  That is Epson waste ink counter IC and found on all Epson Printer.
    step 1 T50 -T60 resetting
  3. You can reset your printer without any resetter by following these ways.
  4. Soldering pin no 1,2,3,4 by wire  as show in PICTURE and now turn on printer for ”20 second”
    step 2 T50 -T60 resetting
  5. After 20 second turn off printer  and remove soldering wire from pin no. 1,2,3,4 ( back in original condition)
  6. Now turn on your printer
  7. And now your printer will be RESET
Note: This method is not recommended for beginners so you have to understand what you are doing. All problem caused by this tutorials is not our responsibility. Use this tutorial as your own risk.
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Resetter Epson stylus T10 T11 T20E TX200 TX400

Suitable for Epson Stylus T10,T11,T20E,TX200,TX400 Inkjet Printer
Original ink cartridges Model
73N Black Ink Cartridge (Standard Ink)
73N Cyan Ink Cartridge (Standard Ink)
73N Magenta Ink Cartridge (Standard Ink)

Specifications:

* Offered with new version Combo chip with Switch and buttons.
* Can used without original Cartridge on with the Switch down
* High quality, low cost, easy maintenance
* 80ml volume of ink for continuous printing without changing cartridges
* Easy setup for long-term usage
* Designed to perform with maximum reliability, efficiency and ease of operation
* Cuts the running costs of printers by 90% because the same ink tanks can be used over and over again
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