The exit roller motor (M4) lock signal remains set to H for a set period of time while the exit roller motor (M4) is turning.Description: Paper exit roller drive motor malfunction.3 PS17 I/O check, sensor check FSCB CN20-6 (ON) FS-526 L-11 4 M1 operation check FSCB CN19-1 to 4 FS-526 D-13 5 Change M1 - 6 FSCB ICP4 conduction check - 7 Change FSCB
![bizhub c452 error code t81 bizhub c452 error code t81](https://i.ytimg.com/vi/4h3ABulIgBY/maxresdefault.jpg)
2 Check the connector of M11 for proper drive coupling, and correct as necessary.
#Bizhub c452 error code t81 Ps4#
3 PS4 I/O check, sensor check FSCB CN20-18 (ON) FS-526 L-14 4 PS7 I/O check, sensor check FSCB CN20-15 (ON) FS-526 L-14 5 M5 operation check FSCB CN22-1 to 11 FS-526 K-5 6 Change M5 - 7 FSCB ICP1 conduction check - 8 Change FSCB 2 Check the connector of M5 for proper drive coupling, and correct as necessary. Causes: Main tray lift motor (M5) Main tray top surface sensor (PS4) Staple paper exit top surface sensor (PS7) FS control board (FSCB).
![bizhub c452 error code t81 bizhub c452 error code t81](https://i5.walmartimages.com/asr/60efbd34-5784-4f00-a2bb-93dce43d122d_1.40de89672ad495d8a659dfa303b75563.jpeg)
The staple paper exit top surface sensor (PS7) is turned neither ON nor OFF even after the set period of time has elapsed while the main tray lift motor (M5) is energized.The main tray top surface sensor (PS4) is turned neither ON nor OFF even after the set period of time has elapsed while the main tray lift motor (M5) is energized.Description: Main tray Up/Down motor malfunction.
![bizhub c452 error code t81 bizhub c452 error code t81](https://www.qmanual.com/pic/printer/konica-minolta/bizhub/Konica-Minolta_bizhub_C652_C552_Parts_Manual_[pm]_201203_1_Qmanual.com-1.png)
or more, and turn ON the main power switch. Turn OFF the main power switch, wait for 10 sec.