2JN2-3-7YC20 1 +24V3 O 24 V DC 24 V DC power sourceConnectedto the regis-trationclutch,paper feedclutch anddevelopingclutch2 REGDRN O 0/24 V DC Registration clutch: On/Off3 +24V3 O 24 V DC 24 V DC power source4 FEDDRN O 0/24 V DC Paper feed clutch: On/Off5 +24V3 O 24 V DC 24 V DC power source6 DLPDRN O 0/24 V DC Developing clutch: On/OffYC21 1 +24V3 O 24 V DC 24 V DC power sourceConnectedto the MPpaper feedsolenoid2 MPFDRN O 0/24 V DC MP paper feed solenoid: On/OffYC23 1 +24V1 I 24 V DC 24 V DC power sourceConnectedto the highvoltagePWB2 +3.3V1 O 3.3 V DC 3.3 V DC power source3 ZCROSS I 0/3.3 V DC (pulse) Zero cross signal4 FAN O 0/24 V DC Left cooling fan motor: On/Off5 HEATN O 0/3.3 V DC Fuser heater lamp: On/Off6 SLEEP O 0/3.3 V DC Sleep mode signal: On/Off7 MHVDR O 0/3.3 V DC Main charger output signal: On/Off8 RTHVDR O 0/3.3 V DC Transfer (reverse) bias output signal: On/Off9 PSEL1 O 0/3.3 V DC Transfer (reverse) bias control signal: On/Off10 HVCLK O 0/3.3 V DC (pulse) Developing bias clock signal11 REGN I 0/3.3 V DC Registration sensor: On/Off12 TCNT O PWM Transfer current control signal13 MCNT O PWM Main charger output control signal14 THVDR O 0/3.3 V DC Transfer bias output signal: On/Off15 CASE I Analog Cassette switch: On/Off16 THERM I Analog Fuser thermistor detection voltage17 +24V3 O 24 V DC 24 V DC power source18 SGND - - Ground19 SEPA - - -YC24 1 +3.3V1 O 3.3 V DC 3.3 V DC power sourceConnectedto the wastetoner sensor2 TNFULL I 0/3.3 V DC Waste toner full detection signal3 SGND - - GroundYC25 1 +24V2 I 24 V DC 24 V DC power sourceConnectedto the highvoltagePWB2 +24V2 I 24 V DC 24 V DC power source3 PGND - - Ground4 PGND - - GroundYC26 1 +3.3V1 O 3.3 V DC 3.3 V DC power sourceConnectedto the tonersensor2 TEMPTY I 0/3.3 V DC Toner quantity detection signal3 SGND - - GroundYC27 1 +24V1 O 24 V DC 24 V DC power sourceConnectedto the rightcooling fanmotor2 FAN O 0/24 V DC Right cooling fan motor: On/OffConnector Pin Signal I/O Voltage DescriptionY111030-4 Service Manual