Duplex/Manual Feed Sensor (S1) Service Check - Lexmark C540n Service Manual

5025-2xx, 4xx

Duplex/manual feed sensor (S1) service check

Step Questions / actions
Is the printer setting on a hard, flat surface?
1
Enter Diagnostics Menu (turn the printer off,
2
press and hold
and then release the buttons when the
installed memory and processor speed
displays).
Perform the Base Sensor Test. See
Sensor Test" on page
1. Select Base Sensor Test, and press
Select ( ).
2. Select S1, and press Select (
3. Install tray 1.
Does the display indicate InputS1—Media
Clear...?
Pull tray 1 out.
3
Does the display indicate InputS1—Media
Present...?
Remove the tray, and inspect the sensor.
4
Is there something obstructing the sensor?
Inspect the spring-loaded shaft/flag in the tray.
5
The flag portion of the shaft intercepts the
sensor, except when a sheet is being staged
for duplexing.
Does the shaft rotate freely and return to home
position (flag at top of rotation)?
Is the flag on the shaft broken?
6
Verify the cable is correctly connected to
7
JFUSES1 on the controller board and to the
sensor.
Is the sensor cable properly connected?
Turn the printer off, and remove the rear
8
shield. See
"Top cover assembly removal"
4-13. Turn the printer on, and check
on page
the values at JFUSES1:
Pin
8
9
Are the values approximately correct?
Service Manual
2-28
and , turn the printer on,
"Base
3-16.
).
JFUSES1
Value
Ground
+3.3 V dc
Yes
Go to step 2.
Go to step 3.
The sensor is functioning
correctly.
Remove the obstruction,
and restart the test.
Go to step 6.
Replace the tray.
Go to step 8.
Replace the duplex sensor.
See
"Duplex sensor
removal" on page 4-28.
No
Make sure the printer is
setting on a level, flat
surface.
Go to step 5.
Go to step 4.
Go to step 5.
Replace the tray with a new
one.
Go to step 7.
Reconnect the cable.
If the problem persists, go to
step 8.
Replace the controller
board. See
"Controller
board removal" on
page 4-20.
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