Lexmark C 746 Service Manual

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Using the touch screen buttons
Note:  Your home screen, icons, and buttons may vary depending on your home screen customization settings, 
administrative setup, and active embedded solutions.
Touch To
1 Up arrow Scroll up.
2 Delete folder Delete the file you selected.
3 Left arrow Scroll to the left.
4 Right arrow Scroll to the right.
5 Right scroll increase Scroll to another value in increasing order.
6 Left scroll decrease Scroll to another value in...

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Understanding the home screen
When the printer is turned on, the display shows a basic screen, referred to as the home screen. Use the home 
screen buttons and icons to initiate an action.
Note:  Your home screen, icons, and the buttons may vary depending on your home screen customization 
settings, administrative setup, and active embedded solutions.8 Accept Save a setting.
9Cancel• Cancel an action or a selection.
• Cancel out a screen and return to the...

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This may also appear on the home screen:6 Status message bar • Show the current printer status such as Ready or Busy.
• Show printer conditions such as Fuser missing or Cartridge Low.
• Show intervention messages and the instructions on how to clear them.
7 Status/Supplies • Display a warning or error message whenever the printer requires 
intervention to continue processing.
• Access the messages screen for more information on the message, and 
how...

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Administrative menus
Note:  Some menu items may not be available based on the printer model or the options installed.
1This menu appears only in touch.screen printer models
2Spending on the printer setup, this menu appears as a Standard Network, Wireless Network, or Network [x] Supplies Menu Paper Menu Reports Settings
Replace Supply Default Source Menu Settings Page General Settings
Cyan Cartridge Paper Size/Type Device Statistics Flash Drive Menu
Magenta...

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Power-on self test (POST) sequence
When you turn the printer on, it performs a Power-On Self Test. Check for correct POST functioning of the base 
printer by observing the following:
1.The operator panel turns on and displays the Lexmark logo.
2.A progress bar displays.
3.The LED turns on.
4.The main fan turns on.
5.The machine performs the following tests:
a.Sensor check
b.Motor check—initializes the following motors:
i.Cam motor
ii.EP drive motor...

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Print quality symptom table
Symptom Action
Background Go to “Print quality—background” on page 2-129.
Blank page Go to “Print quality—blank page” on page 2-130.
Blurred or fuzzy print Go to “Print quality—blurred or fuzzy print” on page 2-132.
Half-color page Go to “Print quality—half-color page” on page 2-132.
Horizontal banding Go to “Print quality—horizontal banding” on page 2-132.
Horizontal line Go to “Print quality—horizontal line” on page 2-132....

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User status and attendance messages
Error code   Action 
Close Front Door Close the front door securely. If you continuously get this error, then either the 24 V interlock 
switch or the 5 V interlock switch is bad. See “24 V interlock switch service check” on 
page 2-121 and “5 V interlock switch service check” on page 2-120.
Disk Corrupted, 
Reformat?The printer has attempted a disk recovery and cannot repair the disk. The disk must be 
formatted...

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Load Manual  
If paper loaded is in the manual feeder, the job continues. If paper is not in the feeder, 
pressing Select indicates to the printer it should search for a source with the proper type and 
size.
Additional messages may include:
• Show Me—the printer will present instructions.
• Cancel Job—the printer job can be cancelled.
Paper Changes Needed
PC Unit Exposure 
WarningThis warning occurs when the front door is left open too long. Close the front...

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3x through 8x attendance messages
31 Defective or Missing 
 Cartridge• Reseat the specified toner cartridge.
• Inspect the smart chip card contacts (A) for damage, contamination or positioning error. If 
damaged, contact your next level of service.
• Inspect the toner cartridge contacts for damage/contamination. Replace the toner 
cartridge if defective.
• Replace the indicated cartridge.
• If the problem still exists, see “31.xx—Cartridge errors...

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37 Insufficient memory 
to collate job• Select Continue to print the portion of the job already stored and begin collating the rest 
of the job.
• Cancel the current job.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-155.
37 Insufficient memory 
for Flash Memory 
Defragment operation• Select Continue to stop the defragment operation and continue printing.
• Delete fonts, macros, and other data in printer...