Center-staple rear adjust drive motor malfunction <When FS-526+SD-508 is installed> 
• The center staple alignment motor home sensor/R (PS31) is turned neither ON nor OFF even after the set period of time has elapsed after the center staple alignment motor /R (M21) is turned ON. <When FS-527+SD-509 is installed> • The center staple alignment home sensor/R (PS41) is turned neither ON nor OFF even after the set period of time has elapsed after the center staple alignment motor/R (M23) is turned ON.