TroubleshootingService Manual 7-15Samsung Electronics7.3.14 Stains on Back of Page• Description The back of the page is stained at 47.1 or 75.4 mm intervals.DigitalDigital PriDigital PrinterDigital PrinterDigital PrinterCheck and Cause Solution1. 47.1mm : Transfer roller is contaminated.2. 75.4mm : Pressure roller is contaminated.1. Perform the OPC Cleaning Mode Print 2 or3 times. Run Self-Test to remove thecontamination from the transfer roller.Note. Replace the transfer roller ifcontaminated severely.2. Disassemble the fuser and clean theH/R(Heat Roller) and P/R(Pressure roller).Check and clean the area between theH/R and the Thermistor. (Caution: Takecare not to deform the rollers.)7.3.15 Blank Page Print out (1)• Description Blank page is printed.Check and Cause SolutionBad ground contacts in OPC and/or tonercartridge.1. Check if the Ground-OPC or the OPCGround Zener diode are defective or opencircuit. (set inside left side).2. Remove contamination of the terminals onthe toner cartridge and the unit.7.3.16 Blank Page Print out (2)• Description1. Blank page is printed.2. One or several blank pages are printed.3. When the printer turns on, several blank pages print.Check and Cause Solution1. Abnormal solenoid. 1. Perform the engine self test using TECHMode to check if the Solenoid is normal.If the problem persists replace the mainPBA
