Genicom 3600 - Manual (Page 62)

3600 Printer Maintenance Manual
c 3 9 c 3 9 frank
3-18
3. Slide the mark sensor into a position that centers it over the label mark as
the media passes by. It is adjustable from the inboard edge of the extrusion
to one half of the paper path width toward the outboard edge.
To adjust the label mark sensor potentiometer sensitivity
1. Remove the electronics cover
2. Switch on the printer power.
3. Enable the printer for mark sensing using the <SI>T{2} command.
4. Connect the positive lead of a digital voltmeter to TP18 (MARK) and the
negative end to TP14 (GND) on the main PCB.
3600M.035
TP18
TP14
R191
5. Place the white portion of a label under the mark sensor.
6. Adjust R191 on the main PCB so the voltage at TP18 is 1V
±
0.2V.
7. Place the black mark portion of the label under the mark sensor.
8. The voltage at TP18 should now be greater than 2.5V.
9. Install the printer electronics cover and the media cover.
10. Check the printer for proper operation.