O-LevelComputer ScienceHardware2210/12 · Oct/Nov 2015 · Q88 Marks

The steps to print a document using a laser printer are shown in the table below. Put each step in the correct order. The first step has been done for you. Step As the printing drum rotates, a laser scans across it; this removes the positive charge in certain areas The printing drum is coated in positively-charged toner; this then sticks to the negatively-charged parts of the printing drum The paper goes through a fuser which melts the toner so it fixes permanently to the paper The printer driver ensures that the data is in a format that the laser printer can understand A negatively-charged sheet of paper is then rolled over the printing drum Data is then sent to the laser printer and stored temporarily in the printer buffer The toner on the printing drum is now transferred to the paper to reproduce the required text and images The printing drum is given a positive charge Negatively-charged areas are then produced on the printing drum; these match exactly with the text and images to be printed Order

(a)The steps to print a document using a laser printer are shown in the table below. Put each step in the correct order. The first step has been done for you. Step As the printing drum rotates, a laser scans across it; this removes the positive charge in certain areas The printing drum is coated in positively-charged toner; this then sticks to the negatively-charged parts of the printing drum The paper goes through a fuser which melts the toner so it fixes permanently to the paper The printer driver ensures that the data is in a format that the laser printer can understand A negatively-charged sheet of paper is then rolled over the printing drum Data is then sent to the laser printer and stored temporarily in the printer buffer The toner on the printing drum is now transferred to the paper to reproduce the required text and images The printing drum is given a positive charge Negatively-charged areas are then produced on the printing drum; these match exactly with the text and images to be printed Order[8]

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Mark scheme

Marking points from the official mark scheme (Oct/Nov 2015). The mark or mark type is shown in brackets.

[1] The printer driver ensures that the data is in a format that the laser printer can understand -> 1
[1] Data is then sent to the laser printer and stored temporarily in the printer buffer -> 2
[1] The printing drum is given a positive charge -> 3
[1] As the printing drum rotates, a laser scans across it; this removes the positive charge in certain areas -> 4
[1] Negatively-charged areas are then produced on the printing drum; these match exactly with the text and images to be printed -> 5
[1] The printing drum is coated in positively-charged toner; this then sticks to the negatively-charged parts of the printing drum -> 6
[1] A negatively-charged sheet of paper is then rolled over the printing drum -> 7
[1] The toner on the printing drum is now transferred to the paper to reproduce the required text and images -> 8
[1] The paper goes through a fuser which melts the toner so it fixes permanently to the paper -> 9

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