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Lexmark C750 Service Manual - Page 157

Lexmark C750 Manual

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5060-00x Check Finisher displayed, unable to clear message Step 1 Action and questions Check for correct printer and finisher installation. Make sure the magnetic bracket is mounted on the printer. Is the magnetic bracket mounted on the printer? 2 Is the pin on the magnetic bracket actuating the joint switch in the finisher? Go to step 3 Find out why the pin is not actuating the switch and repair as necessary. Install the cable correctly Yes Go to step 2 No If not installed, install the bracket 3 Check the joint switch cable connection to CN19 on the finisher system board. Is the cable installed correctly? Go to step 4 4 Check the joint switch activating spring for any signs of damage. Is the switch activating spring broken? Replace the joint switch assembly Go to step 5 5 Check the joint switch for correct operation. The switch can be checked by measuring continuity while actuating the switch. Is the switch operating correctly? Go to step 6 Replace the joint switch assembly. 6 Check continuity of the joint switch cable. Is there continuity? Replace the finisher system board. Replace the cable. Finisher is totally inoperative, no motor movement, no LEDs on This problem can be caused by a problem with the autoconnect system between the finisher and the printer. It also can be caused by a problem with the power system in the finisher. Step 1 Action and questions Check the AC line cord to the finisher to make sure the options and printer are connected properly. Are the printer and options AC line cords connected properly? 2 Make sure the communications cable from the finisher to the printer is installed correctly at the output options autoconnect on the printer. Is the cable installed correctly? 3 Disconnect the autoconnect cable from J7 on the engine board. Check the resistance between J7-6 and J7-7 on the cable connector. The resistance measures between 45 ohms and 50 ohms. Is the resistance correct? Go to step 6 Go to step 4 Go to step 3 Yes Go to step 2 No Connect the printer and options correctly Install the cable correctly. Diagnostic information 2-123

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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Diagnostic information

2-123

5060-00

Check Finisher displayed, unable to clear message

Finisher is totally inoperative, no motor movement, no LEDs on

This problem can be caused by a problem with the autoconnect system between the finisher and

the printer. It also can be caused by a problem with the power system in the finisher.

Step

Action and questions

Yes

Check for correct printer and finisher installation. Make

sure the magnetic bracket is mounted on the printer.

Is the magnetic bracket mounted on the printer?

Go to step 2

If not installed,

install the bracket

Is the pin on the magnetic bracket actuating the joint

switch in the finisher?

Go to step 3

Find out why the

pin is not actuating

the switch and

repair as

necessary.

Check the joint switch cable connection to CN19 on the

finisher system board.

Is the cable installed correctly?

Go to step 4

Install the cable

correctly

Check the joint switch activating spring for any signs of

damage.

Is the switch activating spring broken?

Replace the joint

switch assembly

Go to step 5

Check the joint switch for correct operation. The switch

can be checked by measuring continuity while

actuating the switch.

Is the switch operating correctly?

Go to step 6

Replace the joint

switch assembly.

Check continuity of the joint switch cable.

Is there continuity?

Replace the

finisher system

board.

Replace the cable.

Step

Action and questions

Yes

Check the AC line cord to the finisher to make sure the

options and printer are connected properly.

Are the printer and options AC line cords connected

properly?

Go to step 2

Connect the printer

and options

correctly

Make sure the communications cable from the finisher

to the printer is installed correctly at the output options

autoconnect on the printer.

Is the cable installed correctly?

Go to step 3

Install the cable

correctly.

Disconnect the autoconnect cable from J7 on the

engine board. Check the resistance between J7-6 and

J7-7 on the cable connector. The resistance measures

between 45 ohms and 50 ohms.

Is the resistance correct?

Go to step 6

Go to step 4