Samsung SCX-5530FN/XAZ Service Manual page 134

Troubleshooting
6.3.10 Vertical Line Getting Curved
• Description
When printing, vertical line gets curved.
Check and Cause
1. If the supply of +24v is unstable in the Main Control board
linking with LSU, check drive by Engine Test Mode.
Service Manual
6-10
Solution
1. Replace LSU.
2. Replace the Main Control board.
Samsung Electronics