Color theory
Color theory
What is RGB color?
Red, green, and blue light can be added together in various amounts to produce a large range of colors
observed in nature. For example, red and green can be combined to create yellow. Televisions and computer
monitors create colors in this manner. RGB color is a method of describing colors by indicating the amount of
red, green, or blue needed to produce a certain color.
What is CMYK color?
Cyan, magenta, yellow, and black inks or toners can be printed in various amounts to produce a large range of
colors observed in nature. For example, cyan and yellow can be combined to create green. Printing presses,
inkjet printers, and color laser printers create colors in this manner. CMYK color is a method of describing colors
by indicating the amount of cyan, magenta, yellow, and black needed to reproduce a particular color.
How is color specified in a document to be printed?
Software programs typically specify document color using RGB or CMYK color combinations. Additionally, they
allow users to modify the color of each object in a document. For more information, see the software program
Help topics.
How does the printer know what color to print?
When a user prints a document, information describing the type and color of each object is sent to the printer.
The color information is passed through color conversion tables that translate the color into the appropriate
amounts of cyan, magenta, yellow, and black toner needed to produce the desired color. The object information
determines the application of color conversion tables. For example, it is possible to apply one type of color
conversion table to text while applying a different color conversion table to photographic images.
Should I use PostScript or PCL emulation? What settings produce the best color?
The PostScript driver is strongly recommended for best color quality. The default settings in the PostScript driver
provide the preferred color quality for the majority of printouts.
Why doesn't the printed color match the color I see on the computer screen?
The color conversion tables used in Auto Color Correction mode generally approximate the colors of a standard
computer monitor. However, because of technology differences that exist between printers and monitors, there
are many colors that can also be affected by monitor variations and lighting conditions.
The printed page appears tinted. Can I adjust the color?
Sometimes a printed page may appear tinted (for example, everything printed seems to be too red). This can
be caused by environmental conditions, paper type, lighting conditions, or user preference. In these instances,
adjust the Color Balance setting to create a more preferable color. Color Balance provides the user with the
ability to make subtle adjustments to the amount of toner being used in each color plane. Selecting positive or
negative values for cyan, magenta, yellow, and black (from the Color Balance menu) will slightly increase or
decrease the amount of toner used for the chosen color. For example, if a printed page has a red tint, then
decreasing both magenta and yellow could potentially improve the color balance.
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Appendix C: Theory of operation
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Summary of Contents for XC4150
Page 34: ...7528 34 ...
Page 276: ...7528 276 ...
Page 294: ...Scan SE Scanner Info 7528 Service menus 294 ...
Page 317: ...3 Remove the screw B from the lower left side of the cover B 7528 Repair information 317 ...
Page 320: ...3 Remove the three screws A 7528 Repair information 320 ...
Page 327: ...3 Remove the E clip B 4 Remove the E clip C 7528 Repair information 327 ...
Page 358: ...5 Remove the two screws D from under the gear box 7528 Repair information 358 ...
Page 360: ...3 Disconnect the cable A from the LVPS 7528 Repair information 360 ...
Page 370: ...3 Disconnect the motor cable A A 7528 Repair information 370 ...
Page 371: ...4 Remove the four screws B and then remove the motor B 7528 Repair information 371 ...
Page 374: ...4 Disconnect the cable B 5 Remove the screw C securing the HVPS C 7528 Repair information 374 ...
Page 400: ...14 Remove the clip M and then remove the spacer 7528 Repair information 400 ...
Page 403: ...7528 Repair information 403 ...
Page 414: ...5 Remove the screw C from the printhead 7528 Repair information 414 ...
Page 429: ...8 Route the ADF cable through the flatbed 9 Remove the ADF 7528 Repair information 429 ...
Page 437: ...7 Disconnect the two cables B on the controller board 7528 Repair information 437 ...
Page 443: ...5 Remove the screw D and then remove the scanner tilt D 7528 Repair information 443 ...
Page 478: ...7528 478 ...
Page 485: ...7528 485 ...
Page 487: ...Assembly 1 Covers 1 2 4 6 7 8 9 1 14 10 3 5 13 13 11 11 12 7528 Parts catalog 487 ...
Page 489: ...Assembly 2 Covers 2 14 7528 Parts catalog 489 ...
Page 491: ...Assembly 3 Control panel 5 4 3 2 1 7528 Parts catalog 491 ...
Page 493: ...Assembly 4 ADF and flatbed 1 3 11 10 4 9 5 6 7 8 2 7528 Parts catalog 493 ...
Page 495: ...Assembly 5 Fuser 1 7528 Parts catalog 495 ...
Page 497: ...Assembly 6 Transfer module 1 2 7528 Parts catalog 497 ...
Page 499: ...Assembly 7 Paper feed 8 2 1 2 4 7 3 5 5 6 7528 Parts catalog 499 ...
Page 501: ...Assembly 8 Paper path 1 8 6 2 3 1 10 5 7 9 4 7528 Parts catalog 501 ...
Page 503: ...Assembly 9 Paper path 2 1 4 2 5 10 3 6 9 7 8 7528 Parts catalog 503 ...
Page 505: ...Assembly 10 Duplex 9 8 3 3 7 6 1 1 2 4 5 7528 Parts catalog 505 ...
Page 507: ...Assembly 11 Electrical 16 2 3 4 5 7 8 9 11 12 13 15 6 1 14 10 7528 Parts catalog 507 ...
Page 510: ...7528 Parts catalog 510 ...
Page 511: ...Assembly 12 550 sheet tray option 1 2 1 7528 Parts catalog 511 ...
Page 513: ...Assembly 13 550 sheet tray option 2 1 2 3 4 12 11 6 13 5 9 10 7 8 7528 Parts catalog 513 ...
Page 515: ...Assembly 14 Adjustable stand 2 2 3 3 1 7528 Parts catalog 515 ...
Page 518: ...7528 Parts catalog 518 ...
Page 520: ...7528 520 ...
Page 527: ...3 Apply the changes 7528 Appendix B Options and features 527 ...
Page 528: ...7528 528 ...
Page 554: ...7528 554 ...
Page 568: ...7528 Part number index 568 ...
Page 574: ...7528 Part name index 574 ...