Skip to main content


As we have seen in previous post that arithmetic computation is an important thing in calculation, if a person doesn’t know arithmetic computations,he will be doomed to be in trouble during calculations that happensin everyday life.So it is necessary to learn arithmetic computation.So in this post I am going to take one step further.I am going to write about octal and hexadecimal numbers.
Now let us discuss some arithmetic conversion.Let us see what is octal and hexadecimal numbers used by digital computer.
The conversion from and to binary, octal and hexadecimal plays an important part in digital computers.Since 23 = 8 and 24 = 16 each octal digit corresponds to three binary digits and each four binary digit corresponds to one hexadecimal digit.
The conversion of from binary to octal is easily accomplished by partitioning the binary into group of three digit each, starting from binary point and preceding to the left or to the right…


laser printer,best laser printer,printer,best color laser printer,best laser printers,laser printers,laser,hp printer,color laser printer,best laser printer 2019,hp neverstop laser printers,hp laser printer,best printer,cheap laser printer,hp laser tank printer,best color printer,best laser printer 2018,top laser printers,best laser printer for home,printers,hp never stop laser tank printer

This printer is also known as page printer because they receive their print job one page at a type.  There are two major types of laser printer
1)      The first use a laser to scan the image on two a organic photo conductive drum (OPC)
2)      The second use an array of led to create the image on the drum.  Xerox invented this printer in 1971 but the first laser printer was introduced y hp in 1984.


Tonner cartridge :Tonner is a black carbon substance mixed with polyster resin to make it flow better and iron oxide particles to make it sensitive to electrical charge.  Tonner contain a medium called developer which carries the tonner until it is used by the EP(Electro photography) process.

The tonner also contains the opc drum.  The drum is coated with a photo sensitive material that hold a static charge unless it is exposed to light.  The drum also contains a cleaning blade known as doctor blade. That continuously scraps the unused tonner from the drum.

Load Scanner Assembly:The laser scanning assembly contains a laser LED and a scanning mirror that shines  on the particular area of an OPC drum.  When it does that the drum discharges the charge onlyu to the areas that was scanned.

High voltage Power Supply :The EP process require high voltage electricity hvps provides high voltages to the primary and transfer corona.  This component converts 240 VAC into plus +600 VDC and -600 VDC.

DC power supply : The Hpvs Cannot Provide Power To Together Components Which Runs At A Lower Voltage  The Pc Power Supply Provides 3 Voltages +5 Volt Dc, -5vdc, Used By Logic Circuit Board +24v Used By Paper Transport Motor And Cooling Fans

Paper Transport Assembly : This assembly is responsible for moving the paper into the printer. It consist of a motor and several rubber roller.  The first is the paper feed roller or paper pickup roller, which rub against the paper and pushes one sheet into the printer.  The second is registration roller. 
This roller moves the paper while the opc drum prints.  The third is the fuser roller it moves the paper in very small increments while the fuser assembly makes the print permanent.

Corona Assembly : The first is primary corona, which is a electrical coil now becomes a roller which charges the opc drum with -600v.  The second one is transferred corona,  which charges the paper with +600vdc.  

This two corona assemblies are powered by hvps.  There is a static charges eleminator strip that discharge the static charge from the paper otherwise paper jam will frequently occur.
Fusing Assembly : The Assembly Contains A Halogen Lamp Which Generate Heat Upto 200 Centigrade It Also Contains A Teflon Coated Aluminium Roller For Fusing And A Rubber Pressure Roller .

 As  The  Paper Passes Between The Two Roller, The Pressure Roller Pushes The Paper Against The Fusing Roller Which Melts The Tonner Into Paper

Control Circuit Board : It is a motherboard of a ;printer i.e. Mounted under the printer it converts signals from the computer or that various assemblies can understand the board has connector for each type of interface and coils for each assembly.

Ozone Filter : High Voltage Create Ozone Gas It Is A Chemical Reactive Gas That Effects And Reduce The Life Of Laser Printer Components Every Printer  Contains An Ozone Filter Which Reduce the Ozone Gas While Maintenance Of printer This Filter Must Be Clean.


Post a Comment

Popular posts from this blog



We always use logic in every day matters, so do the machines.But we were taught by experiences we count and the people we trust and these things matters most because it will help in dark times.But to make the machine understand the logic is very hefty work. But this is certainly not impossible.In order to understand logic we use integrated circuits.But to do this we need to design the integrated circuits on paper.This requires certain rules of algebra.This I am going talk about the rule of an algebra called the duality principal.
It states that every algebraic expression deducible from the postulates of Boolean algebra remains valid if the operators and identity elements are interchanged.In a two value Boolean algebra, the identity elements and the elements of the set B are same 1 and 0.The duality principal has many applications.If the dual of an algebraic expression is desired, we simply interchange OR and AND operators and replace…


We live in a world where every field requires use of computers.But computers need data to process the output.This data can be gathered with the help of internet.The internet uses World Wide Web to gather data.So the user must know the basics of the internet.So I am going to acknowledge the basic parts where and how the computer uses internet. I am going to discuss about OSI layers.
Osi means open system interconnectand was invented by ISO (INTERNATIONAL SYSTEM OF ORGANIZATION) which is an institution who manages giving standardization of the products to be manufactured.It was invented by iso in 1984.The use of iso in networking terms is to provide networking standardization of frame workfor implementing network protocols to be used in seven layers.
The seven layers breaks down the process of communication into smaller and easier to handle independent categories.Before osi different networking vendors couldn’t communicate with each other.After iso now different vendors have the abili…