Lexmark 2380 Service Manual - Page 63

Top of Forms Problem Service Check, Diagnostic Information 2-39

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Top of Forms Problem Service Check Note: This service check applies to the 23XX-002 and 23XX-003 printers only. 23XX-001 machines have a single paper sensor that serves as a paper empty sensor and also determines the top of form setting. For top of forms problems on 23XX-001 printers, refer to the "Paper Empty Sensor Service Check" on page 2-26. 23XX-002 and 23XX-003 machines have two sensors: • The left sensor is paper empty. • The right sensor is top of form. FRU Action 1 Top of Form Sensor 2 Main Logic Board Check that the top of form sensor and its flag are properly installed and are undamaged. Remove the paper and set the paper select lever to the cut sheet position and turn the power on. Measure the voltage between main logic board CN8-2 (TOF signal) and CN8-3 (GND). • When there is paper in the printer the voltage should be 0 V dc. • When there is no paper in the printer the voltage should be 5 V dc. Replace the sensor if the voltage is incorrect. Replace the main logic board if the voltage is correct and there is still a problem. Reset the "Bidirectional Print Adjustment" on page 4-5. Diagnostic Information 2-39

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Diagnostic Information 2-39
Top of Forms Problem Service Check
Note:
This service check applies to the 23XX-002 and 23XX-003
printers only
.
23XX-001 machines have a single paper sensor that
serves as a paper empty sensor and also determines the top of form
setting. For top of forms problems on 23XX-001 printers, refer to the
“Paper Empty Sensor Service Check” on page 2-26
.
23XX-002 and 23XX-003 machines have two sensors:
•
The left sensor is paper empty.
•
The right sensor is top of form.
FRU
Action
1
Top of Form
Sensor
Check that the top of form sensor and its flag
are properly installed and are undamaged.
2
Main Logic Board
Remove the paper and set the paper select
lever to the cut sheet position and turn the
power on.
Measure the voltage between main logic board
CN8-2 (TOF signal) and CN8-3 (GND).
•
When there is paper in the printer the
voltage should be 0 V dc.
•
When there is no paper in the printer the
voltage should be 5 V dc.
Replace the sensor if the voltage is incorrect.
Replace the main logic board if the voltage is
correct and there is still a problem.
Reset the “Bidirectional Print Adjustment” on
page 4-5.