Top-Of-Forms Service Check - Lexmark Forms Printer 2400 Service Manual

24xx

Top-Of-Forms Service Check

FRU
1 Top-Of-Form
Sensor
2 Logic Board
2-32
Service Manual
Action
Check that the top-of-form sensor and its flag
are properly installed and are not damaged.
Remove the paper and set the paper select
lever to the cut sheet position and turn the
printer on.
Measure the voltage between logic board
connector CN6-2 (TOF signal) and CN6-1
(GND). You should receive the following
voltage readings:
• 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 top of form sensor if the voltage is
incorrect.
Replace the logic board if the voltage is
correct, and reset the
Adjustment" on page
"Bidirectional Print
4-4.