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Lexmark C750 Manual

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5060-00x 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. Step 1 Action and questions Make sure all packing material is removed from the printer. The detensioner is packing material located underneath the toner cartridges. Make sure the ITU detensioner is removed. Remove the detensioner by pulling up on the red handle on the right side of the ITU. Note: All the print cartridges must be removed to gain access to the detensioner packing material. Has all packing material been removed from the printer? 2 Check the printer is setting on a solid flat surface. Is the printer setting on a solid flat surface? 3 Inform the customer that the printer must be setting on a solid flat surface or install the printer on a solid flat surface as available. Recheck the printer to see if a 100 ITU error is still displayed. Is a 100 ITU error still displayed? 4 Make sure the ITU cleaner gear (A) is turning. Observe the gear by opening the front paper jam door above the integrated paper tray 1. Observe the white cleaner gear during POR. The gear should turn slowly and smoothly for approximately 8 seconds before the printer displays a 100 ITU error. Go to step 5 Go to step 9 Go to step 4 Problem solved Go to step 3 Go to step 4 Yes Go to step 2 No Remove any remaining packing material from the printer Is the ITU Cleaner Gear turning? 5 Check the ITU release lever for correct operation. The ITU release lever is the blue 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 o'clock position. When unlocked it should be in a 3 o'clock position. Undue pressure is not required to operate the lever. Does the ITU release lever operate correctly? Go to step 6 Repair as necessary 2-42 Service Manual

Section	Page
Table of contents	3
Notices and safety information	11
Laser notice	11
Safety information	17
Preface	20
Definitions	20
1. General information	21
Tools required for service	21
Options and features	22
High performance	22
Print quality	22
Heavy volume reliability	22
Automatic calibration	22
Resolution	23
Toner darkness	23
Printer specifications	23
Dimensions	23
Power and electrical specifications	23
Electrical specifications	24
Operating clearances	24
Fuser web oiler upgrade kit and replacements	24
Upgrade kit	24
Replacements	24
Acoustics	25
Environment	25
Print speed and performance print speed	26
Performance	26
Time to first print	26
Processor	26
Duty cycle	26
Memory configuration	27
Available memory options	27
Media specifications	27
Acronyms	33
2. Diagnostic information	35
Start	35
POR (power-on reset) sequence	36
Symptom tables	37
Symptom table-base printer	37
Symptom table-500-sheet drawer option	38
Symptom table-HCIT 2000-sheet option	38
Symptom table-output expander option	39
Symptom table-5-bin mailbox option	39
Symptom table-finisher option	39
Error code table	40
Sub error code table	51
Programming errors - P101 through P116	54
Understanding the printer operator panel	54
Operator panel buttons	54
Color Menu	56
Utilities Menu	57
User attendance message table	62
Service checks	76
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Service Manual

5060-00

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.

Step

Action and questions

Yes

Make sure all packing material is removed from the

printer. The detensioner is packing material located

underneath the toner cartridges. Make sure the ITU

detensioner is removed. Remove the detensioner by

pulling up on the red handle on the right side of the

ITU.

Note

: All the print cartridges must be removed to gain

access to the detensioner packing material.

Has all packing material been removed from the

printer?

Go to step 2

Remove any

remaining packing

material from the

printer

Check the printer is setting on a solid flat surface.

Is the printer setting on a solid flat surface?

Go to step 3

Go to step 4

Inform the customer that the printer must be setting on

a solid flat surface or install the printer on a solid flat

surface as available.

Recheck the printer to see if a 100 ITU error is still

displayed.

Is a 100 ITU error still displayed?

Go to step 4

Problem solved

Make sure the ITU cleaner gear (A) is turning. Observe

the gear by opening the front paper jam door above the

integrated paper tray 1. Observe the white cleaner gear

during POR. The gear should turn slowly and smoothly

for approximately 8 seconds before the printer displays

a 100 ITU error.

Is the ITU Cleaner Gear turning?

Go to step 5

Go to step 9

Check the ITU release lever for correct operation. The

ITU release lever is the blue 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 o'clock

position. When unlocked it should be in a 3 o'clock

position. Undue pressure is not required to operate the

lever.

Does the ITU release lever operate correctly?

Go to step 6

Repair as

necessary