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Trouble Shooting
| Step | Cause | Solution | Parts |
| 1 | ADF roller defects. | Replace the ADF roller. | ADF roller (002-A792-0-SP) |
| 3 | Paper in sensor defects. | Replace the bridge board BBA103. <Video> | Bridge board (004-3471-9-SP) |
| 4 | ADF motor defects. | Replace the ADF motor. <Video> | ADF motor (002-9819-0-SP) |
| 5 | Main broad defects. | Replace the main board MBA934(AD340G) or MBA941(AD340GN/AD340GWN). <Video> | Main Board AD340G (004-3591-9-SP) AD340GN (004-3603-9-SP) AD340GWN (004-3603A-9-SP) |
