PW Sensor Unreached Paper Jam (C3)
Error code
- 20 PW Sensor Unreached Paper Jam (C3)
Occurrence condition
- The PW Sensor does not turn on after the specified time has elapsed since the target Pickup Clutch is activated
Assumed cause
- Foreign objects or pieces of paper in the paper transport path
- The paper feed rollers are worn out, deformed, have fallen off, or have a dirty surface
- Malfunction of the retard torque limiter of the Pickup Unit.
- PW Sensor has a dirty surface, has fallen off, or is faulty
- The cassette pickup clutch has fallen off, or is faulty
- The Feed Clutch, C2 Pickup Roller Clutch, C3 Pickup Roller Clutch has fallen off, or is faulty
- All Drive Motor, C3C4 Drive Motor failure
- MCU Board, C3C4 Drive Motor failure
Related parts
- Pickup Unit for paper feed (Pickup Roller, Torque Limiter, Cassette Feed Roller)
- Pickup clutch of the cassette
- Right Door Unit (Feed Roller, Feed Clutch)
- C2 Paper Feed Roller, C2 Pickup Roller Clutch, C3 Pickup Roller Clutch
- PW Sensor
- All Drive Motor, C2 Drive Motor, C3C4 Drive Motor
- MCU Board, C3C4 Additional Main Board
Troubleshooting
| Step | Confirmation and action | YES | NO |
|---|---|---|---|
| 1 | Check paper transport path Is there any foreign matter, paper chips, etc. in the paper transport path? |
Remove foreign matter, paper fragments, etc. | Go to step 2 |
| 2 | Check the paper transport roller sensor for dirt and installation Are the roller and sensor specified in the part to be checked installed properly? Make sure no dirt remains on the surfaces. |
Go to step 3 | Clean and reinstall the paper feed rollers. |
| 3 | Check the deformation and wear of the paper transport roller Are the rollers listed on the suspected part deformed or worn? |
Replacement of applicable paper transport roller | Go to step 4 |
| 4 | Check the Torque Limiter Can you rotate the Retard Roller by hand? |
Go to step 5 | Replace the retard torque limiter. |
| 5 | Check the Cassette Feed Sensor for paper feed for installation, dirt, and connection Is the sensor of the target cassette installed improperly? Is there dirt on the sensor? Is the connector not fully inserted? Are the connectors for the cassette pickup unit not fully inserted? |
Clean the sensor surface, reinstall the sensor, or fully insert the connector. | Replace the Sensor |
| 6 | Check PW sensor operation Check the operation of the PW Sensor with the diagnostic function Judgment: Does the signal change between when the paper is placed and when it is not? |
Go to step 8 | Go to step 7 |
| 7 | Check the PW Sensor for installation, dirt, and connector connection s the Registration Sensor installed improperly? Is there dirt on the sensor? Is the connector not fully inserted? |
Clean the sensor surface, reinstall the sensor, or fully insert the connector. | Replace the Sensor |
| 8 | Check the clutch installation Are the Cassette Paper Feed Clutch, Feed Clutch, and C2 Pickup Roller Clutch for paper feed installed properly? |
Go to step 9 | Reinstall it properly. |
| 9 | Check each Cassette Paper Feed Clutch Check the clutch operation using the failure diagnostic function. Does it make an operating sound (clutch connection sound)? |
Go to step 10 | Go to step 11 |
| 10 | Check operation of the Feed/C2/C3 Pickup Roller Clutch Check the clutch operation using the failure diagnostic function. Does it make an operating sound (clutch connection sound)? |
Go to step 12 | Go to step 11 |
| 11 | Check the malfunctioning clutch for connection Are any of the connectors connecting the clutch not fully inserted? |
Connect securely | Replace the parts one by one.
|
| 12 | Check the operation of the All Drive Motor Check the operation of the corresponding All Drive Motor, C2 Drive Motor, and C3C4 Drive Motor with the diagnostic function. Is there any abnormal noise? |
Replace the gear train, All Drive Motor, C2 Drive Motor, and C3C4 Drive Motor | Replace the MCU Board and C3C4 Additional Main Board |