PROBLEM DESCRIPTION: From the top to the bottom of the page,
either a solid line or blank line of variable thickness is printed.
CAUSE: Their are six possible causes for this symptom:
1 - Defective toner cartridge
2 - Defective scanner unit
3- Dirty or bent primary or transfer corona wires
4 - Dirty fuser assembly or wiper
5 - Defective I/O board
6 - Defective DC controller board
CURE: First, perform a service print test and see if the same
symptom is exhibited. If it is, the I/O board can be removed from
the list of possible causes. If not, replace the I/O board and re-test.
If after the I/O board has been replaced or removed from
consideration, replace each item, 2 through 6, rechecking for the
problem after each replacement until the unit is printing properly.
If the above cure doesn't fix the problem, refer to the LaserWriter
Tech Procedures to obtain a troubleshooting procedure.