Abnormal Theta Sensor - Lexmark C925 Service Manual

5041-030
132.xx Abnormal theta sensor
Step Action and questions
1 Is the reference pattern for the color plane alignment
printing properly on the transfer belt?
2 Did all the colors print on the test pattern?
3
Replace the LED head of the colors that failed to print.
Did this fix the problem?
4
Check CN01 on the HVPS, CN11 on the printhead
controller, and the CN1-4 for proper connections. Are
the connected properly?
5
Is the Theta sensor cable connected properly
connected to CN 8 on the printhead controller board
and Theta sensor?
6 Is the sensor misaligned, the sponge blocking the
sensor and the cover opening and closing smoothly?
7 Replace the theta sensor. Does this fix the problem?
8
Replace the engine controller board. Does this fix the
problem?
9 Replace the HVPS. Does this fix the problem?
2-34
Service Manual
Yes No
Go to step 4. Go to step 2.
Go to step 4. Go to step 3.
Problem solved Go to step 4.
Go to step 5. Connect the
cables properly.
Go to step 6. Properly connect
the cable to CN8
on the printhead
controller board
and Theta
sensor.
Properly align the Go to step 7.
sensor and
reposition the
sponge on the
theta sensor
cover. Make sure
the cover opens
and closes
smoothly.
Problem solved Go to step 8.
Problem solved Go to step 9.
Problem solved. Contact your
second level
support.
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