Lexmark Optra N 4040 Service Manual page 82

4040
FRU
7 Sensing
Switch
(SW31)
8 Sensor Lever
9 Paper Sur-
face Sensor
(PS33,
PS34)
10 Paper-Size
Sensing
Switch Board
11 Paper Deck
Driver Board
2-54
Action
Remove connector J121 from the lifter abnormal
position sensing switch. Measure the resistance
between connectors J121-1 and J121-2 on the
switch side. Replace the switch, (26-43) if the
resistance reads infinity when the switch is
closed.
Adjust the lever so it moves smoothly.
Replace if damaged.
Pull the tray half way out and lower it. Turn
the printer power on. Measure the voltage
between connectors J208-8 (LIFT) and
J208-6 (+5V) on the paper deck driver
board. Replace the sensor (27-30) if the volt-
age is about 5 V.
The paper-size sensing switch board could be
bad. Replace the switch (23-18).
The paper deck driver board could be bad.
Replace the board (23-41).