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Lexmark C750 Service Manual - Page 201

Lexmark C750 Manual

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5060-00x 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: Test in Progress ...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 is displayed: Test Complete Code or Test Failed Code If the test is successful, the pass code will be a number between - 250 and + 250. Do not install a shim. If the test fails, then a fail code will be a number between 0 and 200 and a message indicates the cause of the failure. The following is a list of failure codes: • Cover open. • Cartridges NOT removed. • Less than three revolutions before the test ended (may never be displayed). Belt tracked to front. • 100 revolutions when test ended, belt tracked to front. • 103

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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Match case Limit results 1 per page

Diagnostic aids

3-17

5060-00

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.

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 is displayed:

If the test is successful, the pass code will be a number between - 250 and + 250. Do not install a shim.

If the test fails, then a fail code will be a number between 0 and 200 and a message indicates the cause of

the failure. The following is a list of failure codes:

•

Cover open.

•

Cartridges NOT removed.

•

Less than three revolutions before the test ended (may never be displayed). Belt tracked to front.

•

100 revolutions when test ended, belt tracked to front.

•

103 <=3 revs before test ended. Probably never displayed. Belt tracked to rear.

•

104-200: numbers of revs when test ended +100. Belt tracked to rear.

To exit the test, press any button.

Verify the failure code by comparing the belt position to the initial position. Install the shim to the rear if the

belt tracked to the rear. Install the shim to the font if the belt tracked to the front. Refer to the instructions

included with the shim for installation.

After installing the shim, run the test, again. If the test fails, rerun several times as the belt needs time to

stabilize. Once the test is successful, reinstall the cartridges and restart the printer.

Test in Progress

..................................

Test Complete

Code <pass code>

Test Failed

Code <fail code>