Sensor (Punch Unit Side Reg) On Failure - Lexmark W840 Finisher Service Manual

Step Check
8 Perform a test print.
Does the error still occur?

988.00 Sensor (punch unit side reg) on failure

Note: This procedure pertains to sensor punch unit reg1 and reg2.
Step Check
1 Check the punch carriage by moving it with your
fingers.
Does the punch carriage move back and forth
smoothly?
2 Check the sensor (punch unit side reg1) for correct
operation.
Perform the Punch side reg1 test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Punch and Staple.
5. Select Punch side reg1.
Does the display on the operator panel change every
time a piece of white media is placed over the sensing
area of the sensor (punch unit side reg1)?
3 Check the sensor (punch unit side reg2) for correct
operation.
Perform the Punch side reg2 test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Punch and Staple.
5. Select Punch side reg2.
Does the display on the operator panel change every
time a piece of white media is placed over the sensing
area of the sensor (punch unit side reg2)?
4 Check the appropriate sensor (punch unit side reg)
connection.
Is the above sensor connected properly?
Yes No
Replace the Problem solved.
finisher controller
card assembly.
See "Finisher
controller card
assembly
removal" on
page 4-118.
Yes No
Go to step 2. Remove
obstructions.
Go to step 3. Go to step 4.
Go to step 5. Go to step 4.
Replace the Replace the
appropriate connection.
sensor (punch
unit side reg).
See "Sensor
(punch unit side
registration
pair) with
bracket
removal" on
page 4-44.
Diagnostic information
4024-XXX
2-75