Konica Minolta Colorforce 8050 Service Error Code Sc27-01

[EXPRESSCENTER]

Hi, Can Anyone Tell Me What This Means And How To Fix It. It Happens At Power Up In About 1 Minute.thanks

[knightfall]

F27-01 Output of toner density sensor /Y (TDS Y) cannot be controlled.

is there yellow developer? did it run out of yellow toner and no replenished?
check your tds and its connector on the yellow developer unit.
goto i/o and check tds/y and compare to other tds colors.
could be bad tds/y bad worse case the prcb bad.
good luck

[random]

On the developer tank at the front is a sensor (follow the cable) unscrew it and see if any powder (developer) falls out. If not problems. If so screw it back in place and reboot the engine.