1156 Prints voids• Is the contact plate of the transfer roller in proper contact with the power supply/sensor board (seeFigure 6-5)?• No Adjust the contact plate so that it touches the power supply/sensor board and the shaftof the transfer roller properly.• Yes Replace the transfer roller.• Has the problem been solved?• Yes End• No Is the tension between the back-up roller (7.52kg) and the surface of back-up roller normal?• No Replace the back-up roller or bias spring.• Yes Are the contacts of the toner supply roller, developing roller, image drum and charging rollerin proper contact with the contact assy (see Figure 6-4 A , B , C , D , E )?• No Adjust the contacts so that they touch the contact assy properly.• Yes Replace the image drum cartridge.• Has the problem been solved?• Yes EndNote: After replacing the image drum cartridge, set the printer in the user maintenancemode by turning the power on while pressing the MENU key, and reset the drumcounter (see Printer Handbook).• No Is the LED head being installed properly (check HEAD1 and HEAD 2 connectors on the maincontrol board and PC Connector on the LED head)?• No Install the LED head properly.• Yes Replace the LED head or the head cable(s).• Has the problem been solved?• Yes EndNote: After replacing the LED head, set the printer to the engine maintenance mode by turningthe power on while pressing the FORM FEED and ENTER keys. Set the LED head drivetime (see 4.2).• No Replace the main control board or power supply/sensor board.
