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Lexmark C750 Service Manual - Page 292

Lexmark C750 Manual

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5060-00x 13. Disconnect the three sensors (A) from the frame. A Service tip: A light aimed toward the grounding clip (B) makes the removal easier. C B 14. Service tip: Leave the old sensor cable assembly (C) in place temporarily after disconnecting the sensors as a guide to placement of the sensors for the new assembly. Lay the new sensor cable assembly beside the old one and connect the new sensors as you remove the old assembly. The new sensor cable assembly is installed on the other side of the grounding clip (closer to the fuser), so you do not have to reinstall the new sensor cable assembly between the clip and upper frame channel. Pull the old sensor cable assembly to remove it. Observe the routing of the cable, especially the location of the cable (C) around the grounding clip (B). The new cable will be installed on the opposite side of the clip. Pulling too firmly on the sensor cable assembly may unseat the grounding clip. The old cable assembly runs between the frame and the grounding clip. 4-74 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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4-74

Service Manual

5060-00

13.

Disconnect the three sensors (A) from the frame.

Service tip:

A light aimed toward the grounding clip (B) makes the removal easier.

Service tip:

Leave the old sensor cable assembly (C) in place temporarily after disconnecting the sensors

as a guide to placement of the sensors for the new assembly. Lay the new sensor cable assembly beside

the old one and connect the new sensors as you remove the old assembly. The new sensor cable

assembly is installed on the other side of the grounding clip (closer to the fuser), so you do not have to

reinstall the new sensor cable assembly between the clip and upper frame channel.

14.

Pull the old sensor cable assembly to remove it.

Observe the routing of the cable, especially the location of the cable (C) around the grounding clip (B). The

new cable will be installed on the opposite side of the clip.

Pulling too firmly on the sensor cable assembly may unseat the grounding clip. The old cable assembly

runs between the frame and the grounding clip.