During the installation of the new toshiba copier machine es 555 i confronted with a unique problem,when i make the copy from the exposure glass its ok,but when i use adf to copy,the exposure lamp the on full time and the machine is running,after few minutes it gives out a blanket copy and issues error code f111,the problem is in the connector of the adf unit,i found that the adf connector at the back has a loose connection,one of the pin from the connector has pop out of position,try fitting it properly to fix the problem.......