Lexmark C 746 Service Manual

General information1-11
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Input and output sizes and types
Media Sizes
Primary 550-sheet tray
Multipurpose feeder
Optional 550-sheet tray
Optional Speciality 
Media
Optional 2000-sheet
feeder (HCIT)
Duplex
Paper sizes
A4 210 x 297 mm✓✓✓✓✓✓
A5 148 x 210 mm✓✓✓✓ ✓
A6 105 x 148 mm✓✓
JIS B5 182 x 257 mm✓✓✓✓ ✓
Officio (Mexico) 216 x 340 mm✓✓✓✓ ✓
Letter 8.5 x 11 in.✓✓✓✓✓✓
Legal 8.5 x 14 in.✓✓✓✓✓✓
Statement 5.5 x 8.5 in.✓✓✓
Executive 7.25 x 10.5 in.✓✓✓✓ ✓
Folio 8.5 x 13 in.✓✓✓✓ ✓...

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Envelopes
C6 Envelope 114 x 162 mm
a✓✓
B6 Envelope 125 x 176 mm
a✓✓
C65 Envelope 114 x 229 mm
a✓✓
C5 Envelope 162 x 229 mm✓✓
B5 Envelope 176 x 250 mm✓✓
DL Envelope 110 x 220 mm✓✓
6 3/4 Envelope 3.4 x 6.5 in
a ✓✓
7 3/4
 Envelope 3.4 x 7.5 in ✓✓
9 Envelope 3.9
 x 8.9 in✓✓
10 Envelope 4.13
 x 9.5 in✓✓
11 Envelope 4.5 x 10.4 in
a ✓✓
12 Envelope 4.8 x 11 in
a ✓✓
aThese sizes are accessible using Other Envelope setting.
Media weight, primary tray and option tray...

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Paper guidelines
Paper characteristics
The following paper characteristics affect print quality and reliability. Consider these characteristics when 
evaluating new paper stock.
Weight—The printer can automatically feed paper weights from 60 to 162l7 g/m
2 (16 to 43 lb bond) grain long. 
Paper lighter than 60 g/m2 (16 lb) might not be stiff enough to feed properly, causing jams. For best 
performance, use 75 g/m2 (20 lb bond) grain long paper. For paper...

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•Preprinted papers that require a registration (the precise print location on the page) greater than ±2.3 mm 
(±0.9 in.), such as optical character recognition (OCR) forms
Note:  In some cases, registration can be adjusted with a software application to successfully print on 
these forms.
•Coated papers (erasable bond), synthetic papers, thermal papers
•Rough-edged, rough or heavily textured surface papers, or curled papers
•Recycled papers that fail...

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Storing paper
Use these paper storage guidelines to help avoid jams and uneven print quality:
•For best results, store paper where the temperature is 21°C (70°F) and the relative humidity is 40%. Most 
label manufacturers recommend printing in a temperature range of 18 to 24°C (65 to 75°F) with relative 
humidity between 40 and 60%.
•Store paper in cartons when possible, on a pallet or shelf, rather than on the floor.
•Store individual packages on a...

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Acronyms
BLDC Brushless DC Motor
BUR Back Up Roll
CCyan
COD Color On Demand
DIMM Dual Inline Memory Module
DRAM  Dynamic Random Access Memory
EP     Electrophotographic Process
ESD    Electrostatic Discharge
FRU    Field Replaceable Unit
GB Gigabyte
HCIT High-Capacity Input Tray
HVPS  High Voltage Power Supply
KBlack
LASER  Light Amplification by Stimulated Emission of Radiation
LCD    Liquid Crystal Display
LED    Light-Emitting Diode
LVPS Low-Voltage Power...

Diagnostic information2-1
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2.  Diagnostic information
Start
Use the service error code, user status message, user error message, symptom table, service checks, and 
diagnostic aids in this chapter to determine the corrective action necessary to repair a malfunctioning printer. 
They will lead you to solutions or service checks, including the use of various tests.
Symptom tables
If your printer completes the “Power-on self test (POST) sequence” on page 2-9 without an error, and...

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Operator panel and menus
C746x operator panel
C746x buttons and light descriptions
Use the To
1 Display • View printer status.
• Allow printer setup and operation.
2 Select button Submit changes made in the printer settings.
3 Navigation buttons Scroll up and down or left and right.
4 Keypad Enter numbers and letters.
5 Sleep button Enable Sleep mode.
The following are the statuses based on the indicator light and the Sleep 
button:.
• Entering or waking from...

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C748x operator panel
C748x buttons and light descriptions
9 Indicator light Check the status of the printer.
10 USB port Connect a USB Bluetooth adapter or a flash drive to the printer.
Note: Only the front USB port supports flash drives.
Use the To
1 Display • View printer status.
• Allow printer setup and operation.
2 Home button Go to the home screen.
3 Keypad Enter numbers and letters. Use the To
Indicator light 
statusIndicates
Off Printer power...

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4 Sleep button Enable Sleep mode.
The following are the statuses based on the indicator light and the Sleep 
button:.
• Entering or waking from Sleep mode
- The indicator light is illuminated solid green.
- The Sleep button is un-illuminated.
• Operating in Sleep mode
- The indicator light is illuminated solid green.
- The Sleep button is illuminated solid amber.
• Entering or waking from Hibernate mode
- The indicator light is illuminated solid green.
- The...