Ricoh FW780 Service Manual - Page 313

5.5 FUSING ...5-2 5.5.1 FUSING UNIT REMOVAL 5.5.2 HOT ROLLER REPLACEMENT 5.5.3 PRESSURE ROLLER REPLACEMENT 5.5.4 PRESSURE ROLLER THERMISTOR REPLACEMENT 5.5.5 PRESSURE ROLLER STRIPPER UNIT REPLACEMENT 5.5.6 HOT ROLLER STRIPPER UNIT REPLACEMENT 5.5.7 HOT ROLLER THERMISTOR REPLACEMENT 5-2 5.5.8 FUSING THERMOFUSE REPLACEMENT 5-2 5.5.9 FUSING TEMPERATURE ADJUSTMENT 5-3 5.6 T & S CORONA UNIT 5.6.1 T & S CORONA UNIT REMOVAL 5.6.2 TRANSFER AND SEPARATION CORONA WIRE REPLACEMENT Preparation Separation Corona Wire Replacement Transfer Corona Wire Replacement 5.7 OTHERS 5.7.1 OZONE FILTER REPLACEMENT 5.7.2 ANTICONDENSATION HEATER INSTALLATION 5.8 COPY QUALITY ADJUSTMENT 5-4 5.8.1 LIGHT SENSOR ADJUSTMENT 5.8.2 IMAGE BIAS ADJUSTMENT 5.8.3 TONER DENSITY ADJUSTMENT 5.8.4 REGISTRATION ADJUSTMENT 5-4 TROUBLESHOOTING 6. TROUBLESHOOTING 6-1 6.1 COPY QUALITY TROUBLESHOOTING 6.1.1 LOW IMAGE DENSITY 6.1.2 UNEVEN COPY IMAGE 6.1.3 DIRTY BACKGROUND 6.1.4 BLACK LINE OR BAND 6.1.5 ENTIRELY BLANK COPY 6.1.6 PAPER CREASING 6.2 SERVICE CALL CONDITIONS 6-1 6.2.1 SC CODE DESCRIPTIONS 6-1 SC Code E-1: Exposure Lamp Abnormal 6-1 SC Code E-2: Fusing Thermofuse Open 6-1 SC Code E-3: Hot Roller Thermistor Open 6-1 SC Code E-4: Hot Roller Thermistor Short 6-2 SC Code E-5: Pressure Roller Thermistor Open 6-2 SC Code E-6: Pressure Roller Thermistor Short 6-2 SC Code E-7: Fusing Overheat 6-2 SC Code E-8: Fusing Warm-up Error 6-3 SC Code E-9: Toner Density Sensor Abnormal 6-3 SM v B047/B048