i have prob with my af2090.sc492 aways appear.so any one can help me. thank bro.....
SC492: Development Unit Suction Motor
While the development unit toner suction motor is operating, the lock sensor output
does not change for 1 s.
• Motor lock due to overload
• BCU defective
Hope this is helpful
You toner tubes are plugged up and you need to replace air pump mylars. Best to replace both of them. Take off the back cover and side cover. Take out the dv unit. section every single one of the black hoses on both ends until they are freed up. Probably will have to kneed the toner out of them or just replace the hose. Make sure you get to every one of them because I have seen more than one plug up.