hi , I have a Toshiba FC22 , hope you can help me out. I am having a CF1 error with the CALL SERVICE message. When I go into the TEST MODE (05) ... the 407 (forced color registration ) wont even go through , it will give me also a CALL SERVICE message. I can do the 878 and 879 test for the IQC sensor without any problem.. What do you think is the problem ? It just happend saddenly one day, my copier will give me that error. I know that my toner cartridge are not yet empty.. I am shaking them and am pretty sure still have toner ... thanks