Lexmark C750 Service Manual - Page 213

Diagnostic aids

3-29

5060-00

x

BASE SENSOR TEST

Use the Base Sensor Test to determine that the sensors located inside the printer are operating correctly. The

following sensors can be checked using this test:

•

Input – S1

•

Input – S2

•

In-Line media Sensor

•

Fuser exit Sensr

See

“Printer sensors” on page 5-3

for locations for these sensors. See

“Cartridge contact assembly pin

locations” on page 5-4

.

CAUTION:

These sensors are near high voltage terminals to the print cartridge. Use a nonconducting item to

toggle these switches and not your hand.

To run the Base Sensor Test.

1.

Select

BASE SENSOR TEST

from the Diagnostics Mode.

OP

for open and

CL

for closed are displayed.

2.

Manually toggle the sensors by hand to verify that each sensor switches from open to closed.

DEVICE TESTS

Quick Disk Test

This test performs a non-destructive read/write on one block per track on the disk. The test reads one block on

each track, saves the data, and proceeds to write and read four test patterns to the bytes in the block. If the block

is good, the saved data is written back to the disk.

To run the Quick Disk Test:

1.

Select

Quick Disk Test

from the Device Tests menu.

•

The power indicator blinks while the test is in progress.

•

Quick Disk Test/Test Passed

displays if the test passes and the power indicator turns on

solid.

•

Quick Disk Test/Test Failed

displays if the test failed and the power indicator turns on solid.

2.

Press

Go

,

Return

, or

Stop

to return to the Device Tests menu.

Disk Test/Clean

Warning:

This test destroys all data on the disk and should not be attempted on a good disk. This test may run

approximately 1½ hours depending on the disk size.

To run the Disk Test/Clean Test:

1.

Select

Disk Test/Clean

from the Device Tests menu.

Files will be lost/Go or Stop?

is displayed to warn the user that all contents on the disk will be

lost.

2.

To exit the test immediately and return to the Device Tests menu, press

Return

or

Stop

. To continue with

the test, press

Go

.

If

Go

is selected,

Disk Test/Clean/BAD:000000 00%

is displayed. The screen updates periodically

indicating the percentage of test completed and the number of bad blocks found.

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
	100
	120
	121
	122
	123
	124
	125
	126
	127
	128
	129
	130
	131
	132
	133
	134
	135
	136
	148
	149
	150
	151
	152
	153
	154
	155
	156
	157
	158
	159
	160
	161
	162
	163
	164
	165
	200
	200
	500
	500
	2000

Lexmark C750 Service Manual - Page 213

Lexmark C750 Manual

Page 213 highlights