Symptom  | Possible cause  | Necessary actions  | 
|---|---|---|
Images are not printed in the areas around the paper edges.  | Defective PCDU  | Replace the PCDU.  | 
Defective toner cartridge  | Replace the toner cartridge.  | |
Defective image transfer belt unit  | Replace the image transfer belt unit.  | |
Image transfer belt not contacting PCDU  | Check the image transfer belt unit.  |