HP LaserJet Pro P1102 HP LaserJet Professional P1100 Series Printer - Service - Page 32
Fuser temperature control,
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Fuser temperature control The fuser temperature control maintains the temperature of the fuser heater at its targeted temperature. The DC controller monitors the FIXING TEMPERATURE (FSRTH) signals and sends the FIXING HEATER CONTROL (FSRD) signal according to the detected temperature. The fuser heater control circuit controls the fuser heater depending on the signal so that the heater remains at the targeted temperature. Figure 1-9 Fuser-heater control circuit AC input Engine controller Fixing control Frequency detection circuit (220-240V model only) FREQSNS DC controller RL101 Relay control circuit Fuser heater safety circuit RLYD Fuser heater control circuit FSRD FSRTH FU1 TH1 H1 Fuser film unit Pressure roller Fuser unit 14 Chapter 1 Theory of operation ENWW