Action Yes No
Step 5
Check the bifold knife drive and idler gears for wear or damage, and
replace if necessary. See
“Booklet maker—Fold section 2” on page 611.
Does the problem remain?
Go to step 6. The problem is solved.
Step 6
a Test the sensor (bifold knife home).
Enter the Diagnostics menu, and then navigate to:
SENSOR TESTS > Hole Punch Booklet Finisher Sensor Tests >
Center fold knife home
b Toggle the sensor.
Does the sensor status change while toggling the sensor?
Go to step 9. Go to step 7.
Step 7
a Make sure that the sensor is properly installed.
b Make sure that the sensor is free of debris or dust.
c Reseat the cable on the sensor. Check the cable for damage, and
replace if necessary.
d Check the sensor for damage.
Is the sensor free of damage?
Go to step 9. Go to step 8.
Step 8
Replace the sensor. See
“Sensor (bifold knife home) removal” on
page 519.
Does the problem remain?
Go to step 9. The problem is solved.
Step 9
a Make sure that the bifold knife and gears are properly installed.
b Check the parts for wear or damage, and replace if necessary. See
“Booklet maker—Fold section 1” on page 609.
Does the problem remain?
Go to step 10. The problem is solved.
Step 10
a Reseat the cable J7 and J11 on the booklet maker controller board.
b If applicable, reseat the junction connectors on the cable.
c Make sure that the cable does not block the path of moving parts.
d Check the cable for damage, and replace if necessary.
Does the problem remain?
Go to step 11. The problem is solved.
4021, 7421
Diagnostic information
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