Lexmark Optra N model 240, Service Manual

Page: 31 / 105

Diagnostic Information 2-18
4040 Finisher
Tray Height Service Check
FRU Action
1 Connectors Be sure J5, J7, and J12 are properly connected to
the finisher driver board.
2 Tray Home
Position
Sensor, PI-8
(3-10) Measure the voltage between J12-5 and J12-6 on
the finisher driver board. If it is not 5 V with the tray
in the home position, or 0 V in the other positions,
replace the tray home position sensor
(PN 11D0071).
3 Tray Upper
Limit Detection
Switch, MS-5
(3-33) Unplug J5 from the finisher driver board. Measure
the resistance between J5-7 and J5-8 on the switch
side. If it is not 0 Ohms, replace the tray upper limit
detection switch (PN 11D0064).
4 Safety Range
Detection
Switch, MS-3
(3-36) Measure the voltage between J5-1 and J5-5/ -6 on
the finisher driver board. Raise the tray until it clicks
two or three times. If the voltage does not change
from 24 V to 0 V or from 18 V to 24 V, replace the
safety range detection switch (PN 11D0068).
If there is still a problem, go to the “Tray Elevation
Motor Service Check” on page 2-17 .