Lexmark C760 Service Manual

Diagnostic information2-35
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40 < color > Invalid 
Refill This message is displayed when the printer has detected a 
refilled Return Program cartridge. <
color> can be black, 
cyan, magenta, or yellow.
Remove the toner cartridge and install a new cartridge.
Press and hold  Select and then press  Return to display any 
secondary error codes that might help diagnose a problem.
Note : The user receives this message for every invalid 
cartridge installed.
50 PPDS
Font Error This error displays when...

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53 Unformatted Flash This message is displayed when the printer detects an  unformatted flash at POST.
Press Go to clear the message.
The flash is marked bad and normal operation continues. 
Flash operations are not allowed until the flash is formatted.
54 Std Par ENA 
Connection Lost This message is displayed when the printer detects during 
POST that the connection to an ENA has been lost. Once a 
connection is initially established, a printer setting is 
modified to 54...

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56 Std Parallel Por t 
Disabled
5 6 Pa ra ll el  Po r t   x 
Disabled These messages may appear when data is sent to the 
printer across a parallel port, but the port is disabled.
Note
: Once the error is displayed the first time, reporting of 
further errors is suppressed until the printer is reset or 
menus are entered.
The following actions can be taken:
 Press  Go to clear the message. Any data received on 
the parallel port is discarded.
 Press  Menu to...

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58 Too Many Bins 
Attached This message is displayed when too many optional bins are 
attached to the printer or if an unsupported combination of 
bins is installed.
58 Too Many Disks 
Installed This message is displayed when too many disks are 
installed.
Note
: Some configurations of different output options 
require the installation of one option before the other.
58 Too Many Flash 
Options This message is displayed when too many Flash Options 
are installed. Verify...

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63 Unformatted Disk This message is displayed when the printer detects an  unformatted disk at POST.
Press Go to clear the message.
The disk is marked as bad and normal operation continues, 
however disk operation is not allowed until the disk is 
formatted.
64 Unsupported Disk 
For mat This message is displayed when the printer detects an 
unsupported disk format at POST. This message may 
appear if the disk was formatted on another system with a 
different...

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85 ITU
Maintenance Check printouts for excess toner. If present, replace the 
suspect car tridge. Otherwise, replace the 
“ITU assembly” 
on page 4-44 . Press Go to continue, however, the message 
persists until replacement.
86 ITU
Maintenance This message displays when the ITU reaches end of life. 
Check printouts for excess toner. If present, replace the 
suspect cartridge. Otherwise, Replace the 
“ITU assembly” 
on page 4-44 . Press Go to continue, however, the message...

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Service checks
100 ITU Error
A 100 ITU error indicates that the printer did not detect the ITU belt home sensor. Before proceeding with this 
service check make sure that the Second Transfer Roll is correctly installed. After you reinstall the Second 
Transfer Roll, check to see if a 100 ITU error is still displayed. If a 100 ITU error is still being displayed, continue 
with this check.
The ITU has an optical sensor that watches for a piece of reflective tape on...

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2Check the ITU Release Lever for correct operation. 
The ITU Release Lever is the black lever located on the 
left upper side frame above the ITU opening and can 
be seen by opening and lowering the MPF Assembly. 
When locked the lever should be at the 6 oclock 
position. When unlocked it should be in a 3 oclock 
position. Undue pressure is not required to operate the 
lever.
Does the ITU release lever operate correctly?Go to step 3 Repair as 
necessary
3Check the second...

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8Check to see if the ITU Drive Roll Gear (A) is turning 
during POR. Observe the gear by opening the MFP 
door to its horizontal position. Observe the gear on the 
left end of the ITU Drive Roll. The ITU Drive Roll Gear 
should turn for a few seconds slowly and smoothly 
before the printer posts a 100 ITU error.
Does the Gear turn? Go to step 10 Go to step 9
9Check to see if the ITU Drive Motor is turning during 
POR. Observe the ITU Motor during POR by removing...

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104 ITU Error
The ITU has an optical sensor that watches for a piece of reflective tape on the inside of the image belt. This 
tape is read every revolution of the belt. If a signal is not received from the belt sensor within a certain time 
period, the printer posts an error due to the loss of signal. There are several causes for the loss of signal. First, 
the belt has tracked too far to the front or rear of the printer. In this case, the belt is still turning, but the...