Lexmark CS310 Service Manual page 60

Actions
Step 7
Turn the printer off, and remove the rear cover. See
on page 290.
Verify the cable is correctly connected to JFUSES1 on the controller board
and to the sensor.
Is the sensor cable properly connected?
Step 8
Turn the printer on, and check the values at JFUSES1:
Pin 8: Ground
Pin 9: +3.3 V dc
Are the values approximately correct?
Duplex/manual feed sensor (S2) service check
The input (S2) sensor is part of the paper pick motor drive assembly FRU, and is not available otherwise.
Actions
Step 1
a
Open the front door to access the jam area.
b
Remove the jammed page(s).
Does the error clear?
Yes
Go to step 8.
"Rear cover removal"
Replace the duplex
sensor. See
sensor removal" on
page
Yes
Problem resolved.
Diagnostic information
60
No
Reconnect the cable. If
the problem persists,
then go to step 8.
Replace the controller
"Duplex board. See
board removal" on
284. page 291.
No
Go to step 2.
5027
"Controller