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Lexmark C750 Service Manual - Page 245

Lexmark C750 Manual

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5060-00x Cartridge rail assembly 1. 2. 3. 4. 5. Open the front cover. Remove the toner cartridges. Remove the ITU assembly. See "ITU assembly removal" on page 4-37. Set aside the top cover assembly. It is not necessary to totally remove it. See "Top cover assembly removal" on page 4-5. Remove the developer HVPS. See "Developer HVPS board removal" on page 4-28. It is not necessary to remove the entire assembly unless you are removing the black cartridge rail. If you are removing the yellow, cyan, or magenta cartridge rails, remove only the large portion of the developer HVPS board. Remove the three mounting screws in the cartridge rail in the front (A) and one from the rear (B) and remove the rail of the selected cartridge assembly (yellow shown). Warning: When removing the black, cyan, or magenta cartridge rails it is necessary to remove the appropriate printhead assembly. Before you can remove the cartridge rail screws, scribe the location of the printhead on the frame before removing the printhead. This will help put the printhead back in the previous location. If a printhead alignment problem develops, go to "Printhead removal and adjustment" on page 4-50 6. Repair information 4-27

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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Repair information

4-27

5060-00

Cartridge rail assembly

Open the front cover.

Remove the toner cartridges.

Remove the ITU assembly. See

“ITU assembly removal” on page 4-37

Set aside the top cover assembly. It is not necessary to totally remove it. See

“Top cover assembly

removal” on page 4-5

Remove the developer HVPS. See

“Developer HVPS board removal” on page 4-28

It is not necessary to remove the entire assembly unless you are removing the black cartridge rail. If you

are removing the yellow, cyan, or magenta cartridge rails, remove only the large portion of the developer

HVPS board.

Remove the three mounting screws in the cartridge rail in the front (A) and one from the rear (B) and

remove the rail of the selected cartridge assembly (yellow shown).

Warning:

When removing the black, cyan, or magenta cartridge rails it is necessary to remove the

appropriate printhead assembly. Before you can remove the cartridge rail screws, scribe the

location of the printhead on the frame before removing the printhead. This will help put the

printhead back in the previous location. If a printhead alignment problem develops, go to

“Printhead removal and adjustment” on page 4-50