Lexmark W840 Finisher Service Manual page 45

Step Check
7 Check the sensor (buffer path) for correct operation.
Perform the Buffer path test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Media Path1.
5. Select Buffer path.
Does the display on the operator panel change every
time the actuator of the sensor (buffer path) is
operated?
8 Check the sensor (buffer path) connection.
Is the above sensor connect properly?
9 Check the drive motor (buffer/transport) by opening the
finisher front door assembly and then closing it.
Does the drive motor (buffer/transport) rotate
normally?
10 Check the drive motor (buffer/transport) connection.
Is the above motor connected properly?
11 Perform a test print.
Does the error still occur?
12 Perform a test print.
Does the error still occur?
Yes No
Go to step 9. Go to step 8.
Replace the After
sensor (buffer reconnecting, go
path). See to step 9.
"Sensor (buffer
path) removal"
on page 4-93.
Go to step 11. Go to step 10.
Replace the drive Problem solved.
motor (buffer/
transport). See
"Drive motor
(buffer/
transport) and
belt (buffer/
transport)
removal" on
page 4-115.
Replace the Problem solved.
bridge unit
interface card
assembly. See
"Bridge unit
interface card
assembly
removal" on
page 4-117.
Go to step 12.
Replace the Problem solved.
finisher controller
card assembly.
See "Finisher
controller card
assembly
removal" on
page 4-118.
Diagnostic information
4024-XXX
2-23