Lexmark Original Toners

Maintenance Kit

Fuser

Spares

Lexmark C750

Lexmark C750 Color Laser Printer Family.

An A4 colour laser printer delivering up to 20 pages per minute and with less than 20 seconds wait to first page out. Engine resolution is 1200x1200 dpi and with enhancement techniques this gives "2400 image quality".

Introduced in October 2002 this printer is fast and robust enough to have remained in service for more than 7 years.

  • C750: 5060-001, 13P0001
  • C750n: 5060, 13P0051
  • C750dn: 5060, 13P0251
  • C750dtn: 5060, 13P0151
  • C750nTR: 5060, 53A0358
  • C750dtnTR: 5060, 53A0359

The C752 was introduced a year later in 2003, it has more features and an enhanced duty cycle.

Control:

The operator panel is Lexmark's old style with an LCD display and 5 buttons for Menu, select, return, go and stop.

Duty Cycle:

60,000 Pages per month maximum one time usage.

10,000 pages per month maximum continuous usage.

Up to 4,000-page average monthly duty cycle

Print Speed (A4, Black): Up to 19 ppm

Print Speed (A4, Color): Up to 19 ppm

Print Speed (Letter, Black): Up to 20 ppm

Print Speed (Letter, Color): Up to 20 ppm

Transparencies: 10ppm

Note that the 20ppm print speed is achieved at "2400 Image Quality" but reduces to 10ppm at 1200x1200dpi. Lower speed at higher resolution is common in printers of this age and is commonly limited by the abilities of the laser-scanner and / or the processor.

Time to first Page (Black) as fast as 17.5 seconds.

Time to first print from power saver mode: 180 seconds.

Automatic Calibration

The printer performs automatic calibration cycles from time to time.

  • At power-on
  • After 8 hours of power saver
  • Approximately every 500 pages, at the end of a job
  • After changing a print cartridge
  • After changing an intermediate transfer unit

Calibration will have can have an impact on print speed.

Black: 1200 x 1200 dpi, 2400 Image Quality.

Color: 1200 x 1200 dpi, 2400 Image Quality.

The engine resolution is up to 1200 dpi. Using image enhancement techniques based on greyscale and dot size Lexmark reckon this can be enhanced to give the equivalent look of 2400 dpi and that the printer is good at handling photographs. (Although its worth noting that laser printers don't generally give pictures looking as good as those from inkjets)

Paper Handling:

Paper Handling Standard

  • 500-Sheet Input Tray
  • 250-Sheet Output Bin
  • 100-Sheet Multipurpose Feeder

The printer is highly configureable taking:

  • A duplex unit and up to 3 extra 500 sheet drawers
  • A duplex unit, one xtra 500 sheet drawers and a 2000 sheet drawer Various output stackers and a mailbox.

Media Sizes:

  • Standard support including letter, legal, A4, A5, JIS B5, executive,f olio, statement, and custom sizes 139.7 mm x 210 mm to 216 mm x 355.6 mm (5.5" x 8.27" to 8.5" x 14")
  • Expanded custom sizes 2.75" x 5" to 9.01" x 14" (69.85 mm x 127mm to 229 mm x 355.6 mm) and 5.83" x 7.17" to 8.5" x 14" (148 mm x 182 mm to 215.9 mm x 355.6 mm) with the Universally Adjustable Tray.

Media Types: Plain paper, bond, envelopes, card stock, transparencies, and paper labels.

Media weights:

  • 60 g/m2 to 176 g/m2 bond (16 lb. to 47 lb. bond)
  • Up to 337 g/m2 card stock (Up to 90 lb. card stock)

Tray 1:Standard input sources: One 100-sheet multipurpose tray on all

Tray 2:Standard input sources: one 500-sheet tray on C750, C750n, C750dn, C750nTR

Tray 3 etc:

Two 500-sheet trays (C750dtn, C750dtnTR).

Maximum input sources: 5

The 2 standard inputs plus 3 additional drawers (500-sheet) C750, C750n, C750nTR)

The 3 standard inputs plus 2 additional drawers (500-sheet) C750dtn, C750dtnTR, One high-capacity feeder 2,000-sheet

Face Down:

Standard output is 250 sheets face down on the printer top.

Options include:

  • Optional 5 bin mailbox
  • Optional 650-sheet stacker
  • Optional 3,000-sheet finisher

Duplex:

Optional duplex unit for two-sided printing

Processor:

350 MHz RISC

Memory:

C750, C750n, C750dn, C750nTR

Memory, Standard 64 MB

C750dtn, C750dtnTR

Memory, Standard 128 MB

Memory, Maximum 512 MB

Expandable Memory Options Yes

RAM Options:

Optional 64MB, 128MB and 256MB SDRAM DIMMs are available from Lexmark and others. Memory used is 168-pin synchronous DRAM DIMMs (dual in-line memory modules).

Additional memory may be required for printing complex pages or full-page, high-resolution images in 1200 image quality at rated speeds.

Flash Memory Options:

According to the service manual the following options are available:

  • Memory slots for extra flash or DRAM: 2
  • Expansion slots for optional interface cards: 1
  • Code expansion slots (application solution firmware cards): 1
  • On-board hard disk interface (for optional hard disk): 1

Interface:

A USB port compatible with USB 2.0 specification is standard on all models. As is a Centronics IEEE 1284 Bidirectional Parallel. And one Internal Card Slot, Lexmark ISP type.

Optional Tri-Port Adapter with RS-232/422 Serial, LocalTalk and IR Adapter ports.

Optional RS-232-C Serial/Parallel 1284-C Adapter.

Optional Coax/Twinax Adapter for SCS

Network:

10/100BaseTX Ethernet standard on the C750n, C750dn, C750dtn.

Token Ring standard (C750nTR, C750dtnTR)

C750 supports the MarkNet N2000 series of internal print servers.

C750 supports the MarkNet N2003 and N2004 series of internal fiber print servers.

C750 supports the MarkNetTM X2000 series of external printer servers.

PCL 5c emulation standard, PCL 6 Emulation, PostScript 3 Emulation

Font Selection:

PostScript - 156 scalable fonts

PCL 6 emulation - 84 scalable fonts

2 bitmapped fonts

System Compatability:

Apple Macintosh Operating Systems Supported, Apple Mac OS 8.6 - 9.x, Apple Mac OS X

Power:

110 to 127 V ac at 47 to 63 hertz (hz) nominal

99 to 137 V ac, extreme

Power Consumption:

Power consumption for the C750 is 500 watts average for the base model and 540 watts with all the options installed. Idle power is 154 watts with power save off and 30 watts with power save on. Consumption figures for the n and dn versions is similar.

Dimensions:

Size (mm - H x W x D) 528 x 604 x 470 mm

Size (" - H x W x D) 20.8 x 23.8 x 18.5

Weight:

Weight (lbs) 105 lbs

Weight (kg) 47.7 kg

Acoustic Noise:

All measurements are made in accordance with ISO 7779 and conform with ISO 9296.

Lexmark C750(n)

2400 image quality printing - 51 dBA

Idle (standby) - 42 dBA

Lexmark C750dn

2400 image quality printing - 53 dBA

Idle (standby) - 42 dBA

Consumables:

As is normal with colour laser printers there are four colour print units. An Intermediate Transfer Unit (ITU) that helps build the images. Toner is removed from the ITU by a second transfer roller. Waste toner is deposited in a separate bottle.

The fuser will also need replacing after 150,000 pages.

The printer has the usual four-colour toners in black, cyan, magenta and yellow.

Toner darkness is adjustable over 5 levels with higher settings giving darker print and using more toner. The darkness setting can be controlled through the operator panel under the Print Quality menu or through the Lexmark C750 PostScript emulation driver.

The message "88 color Toner Low" appears on the control panel display to warn when a cartridge will need replacing. the printer will ordinarily continue printing for several hundred pages more until print in that colour begins to fade.

10B031K Black print cartridge - 10B031K

10B031C Cyan print cartridge - 10B031C

10B031M Magenta print cartridge - 10B031M

10B031Y Yellow print cartridge - 10B031Y

10B032K Black high yield print cartridge - 10B032K

10B032C Cyan high yield print cartridge - 10B032C

10B032M Magenta high yield print cartridge - 10B032M

10B032Y Yellow high yield print cartridge - 10B032Y

10B041K Black PrebateTM print cartridge - 10B041K

10B041C Cyan Prebate print cartridge - 10B041C

10B041M Magenta Prebate print cartridge - 10B041M

10B041Y Yellow Prebate print cartridge - 10B041Y

15,000-page high yield print cartridges and high yield Prebate print cartridges

10B042K Black Toner Cartridge (15K Yield) - 10B042K

10B042C Cyan Toner Cartridge (15K Yield) - 10B042C

10B042M Magenta Toner Cartridge (15K Yield) - 10B042M

10B042Y Yellow Toner Cartridge (15K Yield) - 10B042Y

Waste Toner Bottle:capacity 180,000 black/50,000 color

10B3100, Waster Toner Collector cqapacity 180,000 pages black, 50,000 colour - 10B3100

Image Transfer Belt:

The printer uses an image transfer assembly (ITU) to build colour images.

56P1295 - Intermediate Transfer Unit - 56P1295

56P1296 - Transfer Maintenance Kit (Unit with Roller) The ITU was formerly 12G6304 and the second transfer roller was 12G6303.) - 56P1296

The ITU is accessed by:

  • Opening the front cover.
  • Remove the toner cartridges.
  • Open the Multi Purpose Feeder all the way.
  • Raise the ITU release lever and slide the ITU out of the printer.

The ITU should only be palced on a clean flat surface. Never touch the surface of the ITU belt as that will damage it.

(Instructions with illustrations are given in the user manual)

The Service Manual says: "83 ITU Maintenance is displayed at each 105K copies when the ITU Assembly needs to be replaced to maintain the print quality and reliability of the printer. There are two assemblies, ITU assembly and Second Transfer Roll, in a maintenance kit. Both should be replaced at the same time. The parts are available as a maintenance kit with P/N 12G6304, ITU Maintenance Kit."

An ITU Alignment is required when the ITU assembly is replaced.

To access the configuration menu:

turn the printer off

  • Press and hold Select and Return whilst turning the printer on
  • When "Performing Self Test" appears in the display release the buttons.
  • Select ITU Alignment from the Config Menu. A test page prints.
  • Enter the alignment values for each alignment setting.

Full instructions are in section 3-11 of the service manual.

Fuser:

The fuser bonds toner to the paper. When a fuser unit fails symptoms are vertical marks on the page - and examination of the rollers inside the fuser usually shows marks corresponding with those on the page. The fuser is located in the lower right door assembly and is held by two latches at either side.

Be cautious when handling the fuser - it is very hot in operation and remains so for some time.

12G6301, 115V Fuser - 12G6301

12G6302, 220V Fuser Unit - 12G6302

12G6496, 115V Fuser Maintenance Kit - 12G6496

12G6497, 220-240V Fuser Maintenance Kit, yield, 150,000 pg (formerly 12G6306) - 12G6497

The operator panel displays 80 Fuser Maintenance when scheduled maintenance is required. Yield is 150,000 pages. After replacing the kit, the fuser maintenance count must be reset to zero to clear the message.

See "Reset Fuser Cnt" on page 3-8 of the service manual. (See also p348)

To access the configuration menu:

  • Turn the printer off
  • Press and hold Select and Return whilst turning the printer on
  • When "Performing Self Test" appears in the display release the buttons
  • Select Reset Fuser Cnt from the Config menu to view the count
  • Press Return to return to the previous menu or Select to reset the counter to zero.

Web Oiler Kit:

A fuser web oiler upgrade kit is available for machines where a large number of vinyl or dual-web labels are handled. The web-oiler enables prolonged use of labels without sacrificing fuser life.

12G6502, 100 V web oiler upgrade kit and replacement web oiler fuser - 12G6502

12G6514, 115 V web oiler upgrade kit and replacement web oiler fuser

12G6515, 220 V web oiler upgrade kit and replacement web oiler fuser

12G6545, Web oiler replacement - 12G6545

The printer needs is configuration ID changing to show the web oiler fuser kit has been installed and various minor physical changes. See the Service Manual for details. Briefly. Enter CE Diagnostic mode, Select Printer Setup, Select Configuration Id. Increase both of the last two digits by four. The printer will begin Power On Reset

Maintenance Kit:

Lexmark sell a Fuser and a Transfer Maintenance Kit. These are basically the main items together with a few extra items.

56P1296, Transfer Belt Maintenance Kit (Unit with Roller, formerly 12G6304)

Lexmark also have maintenance kits with a fuser image transfer unit and transfer roller.

13G6305, maintenance kit for a 115 V printer - 13G6305 (Possibly Discontinued)

13G3606, maintenance kit for a 220 V printer - 13G3606 (Possibly Discontinued)

Spares:

A large list of spares is potentially available but the following are commonplace:

40X0070 Pickup Roller (Pack of 2) (formerly 99A0070) - 40X0070

12G6451 MPF Autocompensator Pick Assembly (For MultiPurpose Feeder) - 12G6451

12G6416 500-Sheet integrated tray assembly (tray components are also available) - 12G6416

12G6427 Pickup Assembly for 500 sheet tray - 12G6427

12G6492 Redrive Assembly (Paper Exit Assembly) - 12G6492

12G6303 Transfer Roller (Second transfer roll) - 12G6303 56P1478 Parts Packet - 56P1478

56P4331 Scanner / Print Head assembly - 56P4331

56P1295 Intermediate Tranfer Unit - 56P1295

56P1296 Intermediate Transfer Kit with Roller - 56P1296

99A0070 Pickup Roller (Pack of 2) - 99A0070

56P2848 C752 ITU Maintenance Kit - 56P2848

12G6322 Printhead (the same head is used in all four positions) - 12G6322

Printhead diagnostic tool is a small PCB board with connectors for the printheads and to the formatter. It allows the yellow and cyan or magenta and black printheads to be swapped.

The Service manual notes that engineers should not replace more than one printhead at a time

Options:

Options Are (were):

  • Optional 5 bin mailbox
  • Optional 650-sheet stacker
  • Optional 3,000-sheet finisher
  • Optional duplex unit for two-sided printing

Copyright G & J Huskinson & MindMachine Associates Ltd 2013, 2015, 2016. Some pictures derived from Lexmark User and Service guides. These technical pages do not constitute an offer for sale; just our knowledge at the time of writing. See the catalog. Sales pages on this Web site use cookies to store user information. We also use Google Analytics to track site usage patterns.