Lexmark C750 Service Manual - Page 113

Diagnostic information

2-79

5060-00

x

2000-Sheet high-capacity input tray (HCIT) (243, 244)

Use the

“HCIT Standalone Test Mode” on page 3-34

inside the HCIT to help isolate paper jams. Run the

Standalone Feeding Operation to observe paper feeding from the tray and through the feed assembly. Use the

“HCIT system board LED error code table” on page 2-128

to further isolate paper jam or sensor problem.

Before proceeding with this service check make sure the HCIT is installed correctly.

Step

Action and questions

Yes

No

1

Check for pieces of paper or other obstructions in the

feed assembly.

Are any pieces of paper or obstructions in the feed

assembly?

Remove any paper

or obstructions

Go to step 2

2

Make sure the media loaded in the paper tray meets

printer supplies specifications.

Does the media meet specifications?

Go to step 3

Inform the

customer that

media in the paper

tray does not meet

specifications

3

Use the standalone feeding operation to observe paper

feeding from the tray.

Does the paper feed from the paper tray?

Go to step 14

Go to step 4

4

Using the standalone feeding operation test, observe

the registration motor (the registration motor is the

motor at the top of the feed assembly).

Does the motor turn?

Go to step 5

Go to step 6

5

Does the pick motor, the lower motor in the feed unit

assembly, turn?

Go to step 8

Go to step 7

6

Check the registration motor cable to HCIT system

board cable connected to CN3 for correct installation.

Is the cable connected correctly?

Replace the

following FRUs in

the order shown:

1. HCIT system

board

2. Feed unit

assembly

Install the cable

correctly.

7

Check the pick motor cable to HCIT system board

cable connected to CN4 for correct installation.


Replace the

following FRUs in

the order shown:

1. HCIT system

board

2. Feed unit

assembly

Install the cable

correctly.

8

Use the

“HCIT system board LED error code table”

on page 2-128

.

Does the LED flash 7 times?

Go to step 9

Go to step 11

9

Make sure the registration home sensor cable is

installed correctly to the sensor and to CN6 on the

system board.


Go to step 10

Install the cable

correctly.

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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	200
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	500
	500
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Lexmark C750 Service Manual - Page 113

Lexmark C750 Manual

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