PW (Paper Width) Sensor Dirt error
Error code
- 90 PW Sensor Dirt error
Occurrence condition
- There is paper dust or dirt on the PW sensor unit glass and reflector due to paper dust and paper.
Assumed cause
- Foreign objects or pieces of paper in the paper transport path
- Paper dust or dirt on the PW Sensor Unit glass or reflector
- PW Sensor (Paper Width Sensor) is dirty, has fallen off, or is faulty
- PW Sensor Unit has fallen off
- The reflector is faulty or has fallen off.
- MCU board failure
Related parts
- PW sensor unit
- Reflector
- Right Door Unit
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 PW Sensor Unit glass or reflector Are there paper dust, foreign objects, paper chips on the PW Sensor Unit glass and reflector? |
Remove any foreign objects or pieces of paper and clean the glass and reflector. | Go to step 3 |
| 3 | Check the Paper Width Sensor for installation, dirt, and FFC connection Is the Paper Width Sensor installed improperly? Is there dirt on the sensor? Is the connector not fully inserted? Is the relay connector not fully inserted? |
Clean the sensor surface, check the FFC routing, and connect it securely. | Go to step 4 |
| 4 | Check if the PW Sensor Unit has fallen off Are there any problems with the installation of the PW Sensor Unit? Also, is the relay connector on the rear frame inserted incompletely? |
Handle one by one.
|
Replace the parts one by one.
|