Samsung ML-2851ND/XAZ Service Manual page 104

10) Vertical Line Getting Curved
Description: When printing, vertical line gets curved.
1. If the supply of +24v is
unstable in the Main Control board
linking with LSU, check drive by
2. Chect the Deve PBA
Service Manual
Alignment & Troubleshooting
DCU test:
LSU Check.
in the Toner Cartridge.
Replace LSU.
1. Replace theToner Joint PBA.
2. Replace the MainPBA.
4-55
Samsung Electronics