Lexmark Optra N model 240 Service Manual - Page 31

Tray Height Service Check, Diagnostic Information 2-18, Finisher

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4040 Finisher Tray Height Service Check FRU 1 Connectors 2 Tray Home Position Sensor, PI-8 (3-10) 3 Tray Upper Limit Detection Switch, MS-5 (3-33) 4 Safety Range Detection Switch, MS-3 (3-36) Action Be sure J5, J7, and J12 are properly connected to the finisher driver board. 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). 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). 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. Diagnostic Information 2-18

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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
.