HP M750 series

3. Check the sensor flag on the front-door assembly. If it is damaged, replace the front-door assembly.
4. If the product has been recently serviced, check the connector (J708) on the 24V interlock switch and
the connector (J121) on the DC controller PCA.
Close lower right door
Description
The optional paper feeder right door is open.
Recommended action
1. Open and then close the door.
2. Use the right-door switch (SW1) test in the tray/bin manual sensor test to verify that the switch is
properly functioning. If the switch fails the test, replace the switch.
3. Check the sensor flag on the right door assembly. If it is damaged, replace the lower right door
assembly.
Close middle right door
Description
The 1 x 500-sheet optional paper feeder right door is open.
Recommended action
1. Close the door.
2. Use the right-door switch (SW1) test in the tray/bin manual sensor test to verify that the switch is
properly functioning. If the switch fails the test, replace the switch.
3. Check the sensor flag on the right door assembly. If it is damaged, replace the door assembly.
Close right door
Description
A door on the right side of the product is open.
Recommended action
1. Close the right door.
2. If the error persists, use the manual sensor test to verify that the right door opening/closing sensor is
properly functioning. If the sensor fails, replace the right door switch.
3. Check the right door sensor flag. If it is damaged, replace the right door.
4. If this product was previously serviced, reconnect the connector (J708) on the 24V interlock switch and
the connector (J181) on the DC controller PCA.
Close upper right door For help press ?
Description
The upper-right door of the product is open.
ENWW Tools for troubleshooting 467