hp Color 9850mfp FIXING UNIT II UNIT EXPLANATION 2-65 Symbol Name Function or method L2 Fixing upper lamp 1 Heating of the fixing roller U (main) Halogen heater 750W L3 Fixing upper lamp 2 Heating of the fixing roller U (sub) Halogen heater 750W L4 Fixing lower lamp Heating of the fixing roller L Halogen heater 550W TH1 Fixing temperature sensor 1 Temperature detection at the center of the fixing roller U (main) Non-contact microthermistor TH2 Fixing temperature sensor 2 Temperature detection at the center of the fixing roller L (main) Non-contact microthermistor TH3 Fixing temperature sensor 3 Temperature detection at the edge (at rear) of the fixing roller U (sub) Contact thermistor TH4 Fixing temperature sensor 4 Temperature detection at the edge (at rear) of the fixing roller L (sub) Contact thermistor TS1 Thermostat 1 Fixing roller U temperature abnormality detection Non-contact bimetal Set temperature:
190°C TS2 Thermostat 2 Fixing roller L temperature abnormality detection Non-contact bimetal Set temperature: 160°C FHCB Fixing heater control board Prevention of noise leak in the drive power for the fixing upper lamp /1, /2 (L2, L3) 220V system only