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