I would like to give a comment about my field repair in this case. MP 301SPF SC142-00 and SC101-00 in SC History logged more times.

1. FW Update 2. Cleaning of fb glas, scanner mirror etc. and white line 3. White flatcable disconnected and plugged again to the sbu board.
All this has not helped!!!

After replacing Carriage:Scanner Ass'y D1171651 repair was successful.