Lexmark C 950 Service Manual
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Diagnostic aids 3-69 5058-030 Go Back Previous Next To manually apply a different color conversion table: 1.From the Quality menu, select Color Correction, and then select Manual. 2.From the Quality menu, select Manual Color, and then select the appropriate color conversion table for the affected object type. How can I match a particular color (such as a corporate logo)? From the printer Quality menu, nine types of Color Samples sets are available. These are also available from the Color Samples page of the Embedded Web Server. Selecting any sample set generates a multiple-page printout consisting of hundreds of colored boxes. Either a CMYK or RGB combination is located on each box, depending on the table selected. The observed color of each box is obtained by passing the CMYK or RGB combination labeled on the box through the selected color conversion table. By examining Color Samples sets, a user can identify the box whose color is the closest to the desired color. The color combination labeled on the box can then be used for modifying the color of the object in a software program. For more information, see the software program Help topics. Manual color correction may be necessary to utilize the selected color conversion table for the particular object. Selecting which Color Samples set to use for a particular color-matching problem depends on the Color Correction setting being used (Auto, Off, or Manual), the type of object being printed (text, graphics, or images), and how the color of the object is specified in the software program (RGB or CMYK combinations). When the printer Color Correction setting is set to Off, the color is based on the print job information; and no color conversion is implemented. Note: The Color Samples pages are not useful if the software program does not specify colors with RGB or CMYK combinations. Additionally, certain situations exist in which the software program or the computer operating system adjusts the RGB or CMYK combinations specified in the program through color management. The resulting printed color may not be an exact match of the Color Samples pages. What are detailed Color Samples and how do I access them? Detailed Color Samples sets are available only through the Embedded Web Server of a network printer. A detailed Color Samples set contains a range of shades (displayed as colored boxes) that are similar to a user- defined RGB or CMYK value. The likeness of the colors in the set are dependent on the value entered in the RGB or CMYK Increment box. Manual Color Menu Object typeColor conversion tables RGB Image RGB Text RGB Graphics • Vivid—Produces brighter, more saturated colors and may be applied to all incoming color formats. • sRGB Display—Produces an output that approximates the colors displayed on a computer monitor. Black toner usage is optimized for printing photographs. • Display—True Black—Produces an output that approximates the colors displayed on a computer monitor. Uses only black toner to create all levels of neutral gray. • sRGB Vivid—Provides an increased color saturation for the sRGB Display color correction. Black usage is optimized for printing business graphics. • Off—No color correction is implemented. CMYK Image CMYK Text CMYK Graphics • US CMYK—Applies color correction to approximate the SWOP (Specifications for Web Offset Publishing) color output. • Euro CMYK—Applies color correction to approximated EuroScale color output. • Vivid CMYK—Increases the color saturation of the US CMYK color correction setting. • Off—No color correction is implemented.
3-70 Service Manual 5058-030 Go Back Previous Next To access a detailed Color Samples set from the Embedded Web Server: 1.Type the printer IP address or host name in the address field of your Web browser. Note: If you do not know the IP address or host name of the printer, then you can: •View the information on the printer control panel home screen, or in the TCP/IP section under the Networks/Ports menu. •Print a network setup page or menu settings page and locate the information in the TCP/IP section. 2.Click Configuration > Color Samples > Detailed Options. 3.Select a color conversion table. 4.Enter the RGB or CMYK color number. 5.Enter an increment value from 1–255. Note: The closer the value is to 1, the narrower the color sample range will appear. 6.Click Print.
Diagnostic aids 3-71 5058-030 Go Back Previous Next Finisher theory of operations Media transport This section describes the transfer of media from the printer to a specified bin. The following figures illustrate layouts (front view) of sensors, rollers, and main blocks, as well as a layout (rear view) of the main components. Bridge unit assembly paper path Bridge media entrance sensorTransport roll Decurler roll Bridge exit sensor From printerTo finisher
3-72 Service Manual 5058-030 Go Back Previous Next Finisher media path Upper Media Bin Stacker Media Bin From Bridge Unit Stapler Unit Punch Unit Booklet Bin Booklet Stapler UnitKnife Folding End GuideCompiler Media Unit Assembly
Diagnostic aids 3-73 5058-030 Go Back Previous Next Finisher roll assemblies Finisher Diverter Gate Eject Clamp – driven by media eject clamp motor Buffer Diverter GateUpper Media Exit Roll Assembly- driven by motor (exit) Media Eject Shaft Assembly – driven by media eject motor assembly Booklet media exit roll assembly driven by booklet folding/exit drive motor assembly Booklet fold roll assembly driven by booklet folding/exit drive motor assembly Booklet entrance roll driven by booklet media entrance drive motor assemblyMain paddle assembly driven by drive motor (entrance paddle)Buffer Roll Assembly – driven by drive motor (buffer/transport)Finisher Media Entrance Roll Assembly – driven by drive motor (entrance paddle) Upper Media Transport Roll Assembly – driven by drive motor (buffer/transport) Sub Paddle – driven by drive motor (entrance/paddle) Booklet paddle shaft assembly
3-74 Service Manual 5058-030 Go Back Previous Next Finisher media path sensors Sensor (upper media) Sensor (upper media bin full) Sensor (lower media exit) Sensor (lower media exit) Sensor (booklet media exit) Sensor (booklet bin media present) Sensor (booklet compiler media in) Sensor (booklet media entrance) Sensor (media entrance) Sensor (buffer path) Sensor (diverter gate)
Diagnostic aids 3-75 5058-030 Go Back Previous Next Finisher motors Bridge unit assembly When the printer designates the finisher, the media diverter gate in the printer activates, and media is fed from the printer into the bridge unit assembly. The bridge unit drive motor is activated by the trigger of the printer’s registration clutch, which drives the transport belts in the bridge unit assembly. The motor power is transmitted to the two belts between the bridge unit right shaft assembly and the bridge unit left shaft assembly. The media fed to the bridge unit assembly is securely held between the transport belts and the pinch rolls, and fed to the finisher. Drive motor (exit) Drive motor (buffer/transport) Finisher diverter gate solenoid Buffer diverter solenoid Drive motor (entrance paddle) Stacker bin lift motor assembly Media eject motor assemblyMedia eject clamp motor Bridge unit assembly Bridge media entrance sensor Transport rolls Bridge exit sensor Decurler roll
3-76 Service Manual 5058-030 Go Back Previous Next From bridge unit assembly to punch The media fed from the bridge unit assembly is fed into the finisher by the media entrance roll assembly located on the entrance section of the finisher which is driven by the drive motor (entrance/paddle). The media route inside the finisher is determined by the finisher diverter gate. The finisher diverter gate is activated by the finisher diverter gate solenoid controlled by the printer. The media is further fed in the finisher by the two upper media transport roll assemblies, or the buffer roll assemblies that are driven by the motor (buffer/transport), and passes through the punch unit. The sensor (finisher media entrance) becomes low upon detecting media. After a certain amount of time has passed and the level has changed to high, the motor (buffer/transport) that drives the upper media transport roll assembly or the buffer roll assembly starts reverse rotation. The media is returned to the punch unit by the upper media transport roll assembly or the buffer roll assembly, and is stopped with its end gently pressed against the three punch media stopper assemblies. The three punch media stopper assemblies in the punch unit drop to let media pass through when media is fed to the exit (while the motor (buffer/transport) is rotating forward), but rise when media is returned (while the motor (buffer/transport) is rotating reversely) to stop the media. Thus, punch hole positions in the media feed direction are determined. Drive motor (buffer/transport) Upper media transport roll assembly Punch unit Buffer roll assembly Finisher media entrance roll assembly Sensor (finisher media entrance) Drive motor (entrance paddle)Punch unit Finisher diverter gate solenoid Finisher diverter gate Finisher diverter gate Buffer roll assembly— driven by drive motor (buffer/transport) Finisher media entrance roll assembly—driven by drive motor (entrance/paddle)Media From bridge unit assemblySensor (finisher media entrance)Punch unit Upper media transport roll assembly—driven by drive motor (buffer/transport)
Diagnostic aids 3-77 5058-030 Go Back Previous Next From punch to compiler unit assembly The media is transferred to the compiler unit assembly by the buffer roll assembly (driven by the motor (buffer/ transport)) and by the lower media exit roll assembly (driven by the drive motor (exit)). When the first media reaches the compiler unit assembly, the media eject clamp motor is activated to lower the media eject clamp so that the media eject clamp and the media eject shaft assembly can clamp the media. Thus, the media transferred from the punch unit is held by the media eject shaft assembly and the media eject clamp (driven by the media eject motor assembly) and is fed to the exit. When the media trailing edge passes through the sensor (lower media exit), the media eject motor assembly starts reverse rotation to return the media to the compiler unit assembly. When the following media reaches the compiler unit assembly, the media eject clamp is raised, and the media that has passed through the lower media exit roll assembly falls on the compiler unit assembly. At this time, the three main paddles are rotated by the main paddle shaft assembly to feed the media so that the media trailing edge butts against the rear wall of the compiler unit assembly. The sub paddle solenoid of the media eject unit assembly is activated to lower the sub paddle so that the media can be fed to the compiler unit assembly. Eject clamp Media eject clamp motor Media eject motor assembly Sensor (lower media exit) Media eject shaft assembly Lower media exit roll assembly Compiler unit assembly Buffer diverter gate Buffer roll assembly Drive motor (entrance/paddle) Buffer diverter solenoidDrive motor (exit) Drive motor (buffer/transport)
3-78 Service Manual 5058-030 Go Back Previous Next When printing multiple sets, while stapling the first set on the compiler unit assembly or ejecting it to the stacker media bin, the first media of the second set will not be fed to the compiler unit assembly. When the first media of the second set reaches the finisher, the buffer diverter solenoid is activated by the printer command and by the sensor (finisher media entrance) to switch the buffer diverter gate. Thus, the media route is switched into the buffer roll assembly’s circumferential direction. (This operation is called the buffer path.) The first media of the second set is aligned with the second media, and then they are fed together to the compiler unit assembly. Even for one sheet of media, the buffer path operation is executed in the same way. The media is stacked temporarily on the compiler unit assembly, and then ejected in the stacker media bin. After the buffer path is executed for the first media, if a second media of a different size comes, the first media is fed to the compiler unit assembly, but the second one is fed to the compiler unit assembly without the buffer path. At this time, a certain delay time is provided to prevent the second media from colliding with the first one. From compiler unit assembly to stacker media bin Stapled media on the compiler unit assembly (stapling mode) or aligned media (non-stapling mode) are held between the media eject clamp and the media eject shaft assembly. Eject clamp—driven by eject clamp motor Sensor (lower media exit) Sub paddle—driven by drive motor (entrance/paddle) Media eject shaft assembly— driven by media eject motor asm Compiler unit assembly Lower media exit roll assembly—driven by motor (exit) Main paddle motor—driven by motor (entrance/paddle) Buffer diverter Buffer roll assembly— driven by drive motor (buffer/transport) Media Sensor (buffer path) Buffer roll assembly driven by drive motor (buffer/transport) Buffer diverter gateCompiler unit assembly