Kyocera TASKalfa 4003i

2 The MP tray paper size is misdetected

Step	Check description	Assumed cause	Measures
1	Checking the sub tray	Sub tray is not in the proper position.	Pull out the sub tray to the position where you can see the triangle mark. Or, store it completely inside the MP frame.
2	Checking the connection	The connector is not con- nected properly, or the wire is faulty.	Clean the terminal of the following wire connectors and reconnect the connec- tors. If there is no continuity, replace the wire. • Main unit - Paper conveying unit MP paper length sensor - Feed drive PWB • MP paper width sensor - Feed drive PWB • Feed drive PWB - Engine PWB
3	Checking the MP paper width sensor	MP Paper width sensor does not operate correctly.	Check the home position of the MP paper width sensor, and reattach it if necessary. Then, replace the sensor if it is not fixed.
4	Checking the MP paper length sensor	MP Paper length sensor does not operate correctly.	Reattach the MP paper length sensor. If not repaired, replace it.
5	Replacing the feed drive PWB	The feed drive PWB is faulty.	Replace the feed drive PWB.
6	Replacing the engine PWB	The engine PWB is faulty.	Replace the engine PWB.

3 The controller fan motor does not rotate

(Final phenomenon: Malfunction such as the abnormal image output due to heated CPU)

Step	Check description	Assumed cause	Measures
1	Cleaning the controller fan motor	The fan is dirty with dust.	Clean the controller fan motor.
2	Checking the connection	The connector is not connected properly, or the wire is faulty.	Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. Controller fan motor - Main PWB
3	Replacing the controller fan motor	The controller fan motor is faulty.	Replace the controller fan motor.
4	Replacing the main PWB	The main PWB is faulty.	Replace the main PWB.