Lexmark MS911 - Page 145

Action Yes No
Step 7
a Test the sensor.
Enter the Diagnostics menu, and then navigate to:
SENSOR TESTS > Hole Punch Booklet Finisher Sensor Tests >
Center fold guide home
b Toggle the sensor.
Does the sensor status change while toggling the sensor?
Go to step 9. Go to step 8.
Step 8
Replace the sensor. See
“Sensor (bifold guide home) removal” on
page 488.
Does the problem remain?
Go to step 9. The problem is solved.
Step 9
a Make sure that colored teeth of the bifold roller timing gear and trifold
knife front idler gear are aligned.
b Check the gears for damage, and replace if necessary. See “Bifold
guide drive gears removal” on page 525.
Does the problem remain?
Go to step 10. The problem is solved.
Step 10
a Make sure that the gears connected to the motor (bifold guide) and
bifold rollers are properly installed.
b Check the 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 11. The problem is solved.
Step 11
a Make sure that the bifold guide is properly installed.
b Check the guide for damage, and replace if necessary. See “Booklet
maker—Fold section 2” on page 611.
Does the problem remain?
Go to step 12. The problem is solved.
Step 12
a Make sure that the bifold roller springs and bifold roller arms are
properly installed.
b Check the springs and arms for damage, and replace if necessary. See
“Booklet maker—Fold section 2” on page 611.
Does the problem remain?
Go to step 13. The problem is solved.
4021, 7421
Diagnostic information
145