40931201TH Rev. 4 219 /4.3.2 Troubleshooting Flow• ( JAM error )Paper Input Jam• Does paper jam at the inlet when the power is turned on?• YES Is the paper located above the inlet sensor lever?• YES Remove the paper.• NO Is the inlet sensor lever operating normally?• NO Replace the inlet sensor lever.• YES Clean the inlet sensor 1 on the power supply unit (High Voltage) orreplace the power supply unit (High Voltage).(See Fig.2.3 Sensor Layout Diagram)• NO When the paper is fed in, does the paper input jam occur?• YES Is the paper being fed to above the inlet sensor lever?• YES Is the inlet sensor lever operating normally?• NO Replace the inlet sensor lever.• YES Clean the inlet sensor 1 on the power supply unit (HighVoltage) or replace the power supply unit (High Voltage).(See Fig.2.3 Sensor Layout Diagram)• NO Replace the hopping roller shaft assy or paper cassette.• NO Is the hopping roller shaft rotating?• YES Set the paper properly.• NO Is the stepping motor turning?• YES Replace the one-way clutch gear on the hopping roller shaftassembly.• NO Is the connector cable being connected properly?• NO Connect the connector cable properly.• YES Check the coil resistance (approx. 6.7Ω) of the stepping motor.Is it normal?• NO Replace the stepping motor.• YES Replace the Board-BBB.
