Rap 08 Line Feed Problem - OKIDATA ML590 Service Manual

RAP 08 Line Feed Problem

START
No line feed operation.
Make sure that the line feed cable is properly connected to the line feed motor and CN5 of the
main control board.
Power OFF the printer. Manually rotate the platen.
Does the platen rotate smoothly?
Yes Go to A
No Is the left platen gear broken?
Yes
No
Does the platen rotate smoothly?
Yes Replace the tractor feed assembly.
End of procedure.
No Check the gears on the tractor feed assembly and platen assembly for broken or
missing teeth. Replace the defective assembly.
Go to A
A
Replace the line feed motor assembly.
Has the problem been resolved?
Replace the platen assembly.
End of procedure.
Is the line feed idle gear broken?
Yes Replace the line feed motor assembly or the line feed idle gear.
End of procedure.
No Are the right platen gear, idle gear and/or change gear broken?
Yes Replace the respective assembly.
End of procedure.
No Set the change lever to the rear position.
Service Guide ML590/ML591
Chapter 4 Failure & Repair Analysis
Page: 166