Lexmark C760 Service Manual

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Energy Conserve
When Energy Conserve is on, the customer does not have access to disable the Power Saver function. When 
Energy Conserve is off, Disable appears as an additional menu item in the Power Saver menu. This setting only 
affects the values that are displayed in the Power Saver Menu.
1.Select Energy Conserve  from the Config Menu.
2.Select On or  Off.
Auto Color Adjust
Automatic color adjustments periodically occur during printing, based on internal algorithms...

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Paper Prompts
Setting Paper Prompts controls which tray a change prompt is directed to when paper is sensed to be the wrong 
size.
1.Select Paper Prompts  from the Config Menu.
2.Select Auto, MP Feeder , or Manual Paper .
Env Prompts
Env Prompts controls which tray a change prompt is directed to when the envelopes are sensed to be the wrong 
size.
1.Select Env Prompts from the Config Menu.
2.Select Auto, MP Feeder , or Manual Envelope .
Exit Config Menu
Press Select  to...

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Diagnostics mode
To run the printer diagnostic tests described in this chapter, put the printer in Diagnostics mode.
The tests display on the operator panel in the order shown:
REGISTRATION
ALIGNMENT MENU
TOP FINE MARGIN ADJ
MISC TESTS
PRINT TESTS
HARDWARE TESTS
DUPLEX TESTS (if installed)
INPUT TRAY TESTS
OUTPUT BIN TESTS
FINISHER TESTS (if installed)
BASE SENSOR TEST
DEVICE TESTS (if optional flash or disk installed)
PRINTER SETUP
EP SETUP
ERROR LOG
DEV MENU
EXIT...

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REGISTRATION
Use REGISTRATION to align the black image on the page. Use ALIGHNMENT to align the individual colors. The 
black image should be aligned before the individual colors are aligned.
To set Registration:
1.Select REGISTRATION  from the Diagnostics Mode.
B=Bottom margin
T=Top margin
L=Left margin
R=Right margin
s=Negative values, space blank for positive values
xx =Margin value
*=Current value
2.Press  Go to print the Quick Test Page. Current margin settings are...

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4.Enter the values.
The Top margin sign/value pair  blinks. This indicates it is the margin value being changed.
To select the margin value to change, press  Select until the margin value pair you want to change is 
blinking .
To change the margin value press  Menu. 
When the value you want is displayed, press  Select to save the value. 
5.To verify the margin values are correct print the Quick Test Page from the registration screen. Press  Go to 
print the test page....

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6.Press Go to reprint the Alignment Test Pages to confirm your adjustments on page 1. Repeat steps 4 
through 6 if required.
7.Continue until all three colors are aligned.
8.Press  Return  to exit the ALIGNMENT MENU.
Drift Sensors
This check is used to display the status of the thermal system used to compensate for printhead drift.
The following screen is displayed when the test is selected:
Values:
If Com=Err, replace the system board. See  “System board” on page 4-72....

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MISC TESTS
Motor Detect
This test initiates an Automated Motor Detection. It must be performed if the NVRAM contents are lost during the 
replacement of a paper size sensing board. This test must also be performed anytime the ITU motor, fuser 
motor, or cartridge drive motors are replaced.
To run the Motor Detect:
1.Remove all the print cartridges from the printer and close the cover.
2.Select Motor Detect  from MISC TESTS.
3.Press Go.
Motor Detection in Progress  is...

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Belt Tracking (ITU 4th point adjustment)
This test is used to determine the need for the ITU Shim to correct 4th point alignment following the ITU 
replacement.
Note:  Remove all cartridges before initiating this test and note the belt position.
1.Select Belt Tracking  from the menu. 
The following screen is displayed:
The operation normally takes approximately 15 minutes to complete. It may take less time if the test fails.
When the test is complete, the following screen...

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PRINT TESTS
The Print Tests consist of the following tests:
Tr a y  1
Tray 2 (if installed)
Tray 3 (if installed)
Tray 4 (if installed)
Tray 5 (if installed)
MP Feeder
Print Quality Pgs
For examples of the Print Quality Pages, see  “Print tests” on appendix page B-3.
Print Tests (input sources)
This test determines if the printer can print on media from any of the paper input sources. Each of the installed 
sources is available within the Print Tests menu.
The content of...

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HARDWARE TESTS
The following hardware tests can be selected from this menu:
LCD Test
Button Test
DRAM Test
CASCHE Test
ROM Test
Parallel Wrap (if available)
Serial Wrap (if available)
Serial 1 Wrap (if available)
Serial 2 Wrap (if available)
Serial 3 Wrap (if available)
LCD Test
This test verifies the operator panel LCD function.
To run the LCD Test:
1.Select  LCD Test  from HARDWARE TESTS in the Diagnostics mode.
The LCD test continually executes.
2.Press  Return  or...