Lexmark C736 Service Manual

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1.  General information
The Lexmark™ C73x family of color laser printers. 
Models
Options
Note:  Some configurations may require a caster base for stability. Printer nameMachine type 
and modelDescription
Lexmark C734n 5026-210 Network
Lexmark C734dn 5026-230 Duplex and network
Lexmark C734dnw 5026-280 Duplex, network, and wireless
Lexmark C736n 5026-410 Network
Lexmark C736dn 5026-430 Duplex and network
Lexmark CS736dn 5026-439 Duplex and network
Standard exit bin
Standard exit bin
Multipurpose
feeder
Multipurpose
feeder
Standard 550-sheet
tray (tray 1)
Standard Optional 550-sheet
trays/special media550-sheet
(tray 1)trays
Optional 
high-capacity
input tray
(2,000 sheets) 
						

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Media options
The C734 and C736 printers support the 550-sheet drawer, special media drawers, and 2000-sheet high-
capacity input tray. The Lexmark C734 printers support up to three input options, while the C736 printers 
support up to four input options. The options can include any combination of 550 sheet drawers and 550 sheet 
Specialty Media Drawers, with a maximum of one 2000 sheet drawer (always at the lowest position.) A caster 
base is required with some configurations. Including the base machine capacity of 650 sheets, the C734 
supports up to 3750 sheets and the C736 supports up to 4300 sheets. 
The Lexmark C73x options are compatible with the Lexmark X73x MFP, but not with any other Lexmark printers. 
No other options are supported by the C73x.
The media options include: 
•550-Sheet Drawer—This optional input source installs beneath the printer, and it holds approximately 550 
sheets of (20 lb.) paper. 
•High Capacity Input Tray—This optional input source installs beneath the printer, and it holds 
approximately 2000 sheets of (20 lb.) paper. 
•Specialty Media Drawer—This optional input source installs beneath the printer, and it holds 
approximately 550 sheets of (20 lb.) paper, or 85 standard envelopes. 
Memory options
•Additional memory card—The memory options for the C734 and C736 printers are 200 pin DDR2, 
SODIMM, and they are available at 256MB, 512MB, and 1GB sizes. 
•Flash memory card—Flash Memory cards are available in 256MB. 
•Hard disk—If larger storage is required, an optional hard disk is available. 
						

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Printer specifications
Dimensions
The following table contains the dimensions and weight for each of the respective printer models. This does not 
include packaging.
Height Width Depth Weight
Lexmark C734/C736
Basic printer (cartridges only) 450mm
(17.7 in)435mm
(17.1 in)400mm
(15.7 in)25.7kg
(56.7 lbs)
Printer without toner cartridges, 
photoconductors450mm
(17.7 in)435mm
(17.1 in)400mm
(15.7 in)20.0kg
(44.1 lbs)
Lexmark C734dtn/C736dtn
Printer with 550-sheet optional 
drawer572mm
(22.5 in)435mm
(17.1 in)545mm
(21.5 in)29.7 kg
(65.5 lbs)
Features fully extended
Output paper support extended 527mm
(20.75 in)435mm
(17.1 in)391mm
(15.4 in)25.7kg
(56.7 lbs)
Paper tray extended in back
Letter size media
A4 size media
Legal size media450mm
(17.7 in)
450mm
(17.7 in)
450mm
(17.7 in)435mm
(17.1 in)
435mm
(17.1 in)
435mm
(17.1 in)470mm
(18.5 in)
488mm
(19.2 in)
527mm
(20.7 in)25.7kg
(56.7 lbs)
25.7kg
(56.7 lbs)
25.7kg
(56.7 lbs)
Fully configured printer with 
output paper support extended525mm
(20.7 in)435mm
(17.1 in)400mm
(15.7 in)25.7 kg
(56.7 lbs)
Fully configured printer with 
output paper support extended 
and multipurpose feeder 
extended525mm
(20.7 in)435mm
(17.1 in)584mm
(23.0 in)25.7 kg
(56.7 lbs)
Fully configured printer with 
550-sheet option tray, output 
bin extended, and 
multipurpose feeder extended647mm
(25.5 in)435mm
(17.1 in)729mm
(28.7 in)
29.7 kg
(65.5 lbs)
Options and features
550-sheet drawer only 122mm
(4.8 in)435mm
(17.1 in)545mm
(21.5 in)4.4 kg
(9.7 lbs)
High-capacity input tray 
(2000-sheet) only345mm
(13.6 in)435mm
(17.1 in)545mm
(21.5 in)26.1 kg
(57.5 lbs)
Spacer only 122mm
(4.8 in)435mm
(17.1 in)545mm
(21.5 in)3.6 kg
(8.0 lbs)
Caster base only 108 mm
(4.3 in)778 mm
(30.6 in)812 mm
(32.0 in)42.6 kg
(94 lbs)
Desktop to bottom of operator 
panel(16 in) 
						

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Clearances
Memory
Number Description Clearance
1 Rear 100 mm (3.9 in.)
2 Right side 100 mm (3.9 in.)
3 Front 400 mm (15.7 in.)
4 Left side 150 mm (5.9. in.)
5 Above 150 mm (5.9 in.)
MemoryAll models
Standard memory—The standard RAM is soldered onto the system board.
Memory size
256MB
Optional memory—Optional DIMM (Dual Inline Memory Module) is a card that can be plugged into an 
available memory slot on the system board. Flash memory is a card that can also be plugged into an 
available slot.
Maximum number of memory (DIMM) slots
1
Maximum number of flash memory slots
1
DIMM memory sizes available
256MB, 512MB, 1024MB
Flash (Nand Flash)
256
Maximum possible memory
1280MB 
						

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Expansion opportunities
Resolution
The following resolutions are available:
•4800CQ (default resolution) 
•1200 x 1200 dpi (at reduced printer speed)
Data streams
•PostScript 3 emulation
•PCL 5c and PCL 6 XL Emulations
•PDF 1.6 with backward compatibility
•PPDS (activated from configuration menu)
•HTML
•XPS
•Direct Image (TIFF, TIF, JPEG, JPG, GIF, PNG, BMP, PCX, and DCX)
Environment specifications
Lexmark 
C734n, 
C734dnLexmark 
C734dwLexmark 
C736nLexmark 
C736dn
Interface card expansion slots1011
Code Enhancement Socket 
(application solution firmware)1
Hard disk Interface (for optional 
hard disk)1
Environment Specifications
Operating
Air temperature—Operating 15.6° to 32.2° C (60° to 90° F)
Air temperature—Power off 10° to 40° C (50° to 104° F)
Air Relative Humidity  8% to 80%
Wet Bulb Temperature—Operating 22.8° C (73.0° F) Maximum
Web Bulb Temperature—Power off 26.7° C (80.1° F) Maximum
Altitude 0–3,048 meters (10,000 ft.)
Ambient Operating Environment*  15.6° to 32.2° C (60° to 90° F) and 8% to 80% RH
Shipping and storage
Cartridges (packaged)  -40° C to 40° C (104° Fahrenheit)
Printer with Cartridges (packaged)  -40° C to 40° C   (104° Fahrenheit)
Printer without Cartridges  -40° C to 40° C   (104° Fahrenheit) 
						

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Electrical and power specifications
The following table specifies nominal average power requirements for the basic printer configurations. All power 
levels are shown in Watts (W). Maximum current is given in Amperes (A).
Low-voltage models
•110 to 127 V ac at 47 to 63 Hertz (Hz) nominal
•99 to 137 V ac, extreme
100-voltage model
•100 V ac at 47 to 63 Hertz (Hz) nominal
•90 to 110 V ac, extreme
High-voltage models
•220 to 240 V ac at 47 to 63 Hz (not available in all countries) Air Relative Humidity Relative Humidity 8% to 80%
Altitude 0–10,300 meters (34,000 feet)
Web Bulb Temperature—Power Off 26.7° C (80.1° F) Maximum
* In some cases performance specifications, such as paper OCF and EP cartridge usage, are specified to 
be measured at an ambient condition.
Printing statesLexmark 
C734nLexmark 
C734dn/dwLexmark 
C736nLexmark 
C736dn
Typical Electricity Consumption (TEC)
Normal settings 4.61 kwh/week 4.69 kwh/week
Eco Mode settings 3.83 kwh/week 4.10 kwh/week
Average power while printing
Simplex printing 490 W 490 W 530 W 530 W
Duplex printing N/A 390 W N/A 420 W
Average power while idle
Power Saver 16 W 16 W 16 W 16 W
Ready 45 W 45 W 45 W 45 W
Average power while off
Off 0 W0 W0 W0 W
Maximum average current while printing
220–240 Volts  3.8 A 3.8 A 3.8 A 3.8 A
110–127 Volts 7.5 A 7.5 A 7.5 A 7.5 A
100–110 Volts 8.3 A 8.3 A 8.3 A 8.3 A
Environment Specifications 
						

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•198 to 259 V ac, extreme
Notes:
•Using a 220 V ac to 110 V ac power converter with the low-voltage printer is not recommended.
•Using an inverter (12 V dc to 120 V ac for example) to power the printer is not recommended.
•Only duplex models are ENERGY STAR certified.
Acoustic specifications
All acoustic measurements are made in accordance with ISO 7779:1999—Accoustics: Measurement of airborne 
noise emitted by information technology and telecommunications and reported in conformance with ISO 9296: 
1988-04-15—Accoustics Declared noise emission values of computer and business equipment.
Operating mode1-Meter average 
bystander sound 
pressure at 4800 CQDeclared sound power 
level at 4800 CQ
Lexmark C734/C736
Mono printing (full speed) 54 dBA
Color printing (full speed) 54 dBA
Duplex printing (full speed) 54 dBA
Quiet Print Mode (reduced speed) 48 dBA
Idle 31 dBA 
						

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Media specifications
Paper designed for use with xerographic copiers should provide satisfactory print quality and feed reliability. 
Other types of media may be suitable. It is recommended that users test any particular brand for suitability to 
their applications. Refer to the printer Users Guide for additional media specifications.
Paper
Follow the media guidelines below for successful printing:
•Rough, highly textured, limp, or pre-curled papers will result in lower print quality and more frequent paper 
feed failures.
•Colored papers must be able to withstand 190° C (374° F) fusing temperature.
•Preprinted forms and letterheads must be able to withstand 190° C (374° F) fusing temperature and should 
be selected using guidelines found in the printer User’s Guide. The chemical process used in preprinting 
may render some papers unsuitable for use.
•Unsuitable papers include:
–Multi-part forms and documents
–Chemically treated papers; coated
–Synthetic and thermal papers
–A5 paper less than 80 g/m2 (21 lb)
–Recycled paper less than 75 g/m2 (20 lb)
–Preprinted papers requiring a high degree of registration.
–Recycled paper less than 80 g/m2 (21 lb) may cause unacceptable results.
Envelopes
•
All envelopes should be new, unused, and without package damage. 
•Envelopes with excessive curl or twist exceeding 6 mm, those stuck together, those with bent corners or 
nicked edges, or those that interlock should not be used.
•Minimum weight: 60 g/m2 (16 lb.)
•The following envelopes should not be used:
•Envelopes with windows, holes, perforations, cutouts, or deep embossing
•Envelopes with metal clasps, string ties, or metal folding bars
•Envelopes with exposed flap adhesive when the flap is in the closed position.
•For best results, printing on new 90 g/m2 (24 lb.) sulfite or 25% cotton bond envelopes is recommended. 
•Under high humidity conditions (over 60%), envelopes may seal during printing.
Transparencies
•
Use letter or A4-size transparencies for color laser printers only.
•See Ordering Information for the recommended transparencies for the Lexmark C734/C736 laser printers.
•Do not use inkjet transparencies.
Labels
Labels should be selected using guidelines found in the Users Guide or the Card Stock and Label Guide, and 
tested for acceptability. 
						

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Using recycled paper and other office papers
Recycled office paper produced specifically for use in laser (electrophotographic) printers may be used in your 
printer. However, no blanket statement can be made that all recycled paper will feed well.
Generally, the following property guidelines apply to recycled paper.
•Low moisture content (4–5%)
•Suitable smoothness (100–200 Sheffield units, or 140–350 Bendtsen units, European)
Note:  Some much smoother papers (such as premium 24 lb laser papers, 50–90 Sheffield units) and 
much rougher papers (such as premium cotton papers, 200–300 Sheffield units) have been engineered to 
work very well in laser printers, despite surface texture. Before using these types of paper, consult your 
paper supplier.
•Suitable sheet-to-sheet coefficient of friction (0.4–0.6)
•Sufficient bending resistance in the direction of feed
Recycled paper, paper of lower weight (
						

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Input and output capacities
The following table describes the media options that each model supports, and the estimated capacities in stand 
and maximum configurations. Capacity may vary and is subject to media specifications and printer operating 
environment. The capacities are based on plain paper at 75g/m
2. 
FunctionSupport by model
Lexmark C734n/dn/dw Lexmark C736n/dn
Standard input sources
Primary tray capacity (sheets) 550 550
Multipurpose feeder capacity (sheets) 100 100
Number of standard sources (primary tray 
and multipurpose feeder)22
Total standard capacity (sheets) 650 650
Optional input sources
550-Sheet Drawer (sheets) 550 550
High-capacity input tray (HCIT) (sheets) 2,000 2,000
Specialty Media Drawer
a (sheets) 550 (or 85 envelopes) 550 (or 85 envelopes)
Maximum number of 550-sheet drawers 
(including Speciality Media Drawer)34
Maximum number of high-capacity input 
tray (must be installed on the bottom)11
Maximum number of standard and 
optional input sources56
Maximum capacity for standard and 
options input sources (sheets)3,750 4,300
Standard output bin capacity (sheets)
b 300 300
Maximum output bin capacity (sheets) 300 300
Duplex capability Standard for C734dn and 
C74dw modelsStandard for 
C734dn model
aEach 550-sheet Specialty Media Drawer replaces one 550-sheet option.
bThe output bin capacity may be reduced by 50 sheets when the duplex feature is in use.