Lexmark CS720 Service Manual page 186

Action
Step 3
Reconnect the cable.
Does the problem remain?
Step 4
Check the cable for damage, and replace if necessary.
Does the problem remain?
Step 5
Replace the HVPS. See
Does the problem remain?
Step 6
Replace the controller board. See
page 357.
Does the problem remain?
Motor (CM developer) service check
Action
Step 1
Reset the printer.
Does the problem remain?
Step 2
a
Remove the imaging kit, and then remove the transfer module.
See "Transfer module removal" on page
b
Enter the Diagnostics menu, and then navigate to:
Printer diagnostics & adjustments > Motor tests > CM
developer
c
Touch Start.
Does the motor run?
Step 3
Manually turn the drive gears.
Do the black developer and transfer module drive gears freely
turn?
"HVPS removal" on page
"Controller board removal" on
334.
Diagnostic information
Yes
Go to step 4.
Go to step 5.
Go to step 6.
319.
Contact the next
level of support.
Yes
Go to step 2.
Go to step 3.
Go to step 5.
186
5028
No
The problem is
solved.
The problem is
solved.
The problem is
solved.
The problem is
solved.
No
The problem is
solved.
Go to step 6.
Go to step 4.