Oki B 2400 - Manual (Page 50)

2-32 Service Manual
24xx
Top-Of-Forms Service Check
FRU Action
1 Top-Of-Form
Sensor Check that the top-of-form sensor and its flag
are properly installed and are not damaged.
2 Logic Board 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
“Bidirectional Print
Adjustment” on page 4-4 .