Error Code: C-3519 Follow

Classification
Main body: Fusing temperature sensor/4 wiring disconnection abnormality
 

Cause
The fusing unit becomes inactive because the door opens or closes when the machine starts warm-up or it is in the low power mode. Then, the AD value of the fusing temperature sensor/4 (TH4) changes abnormally within the specified period of time after the fusing unit becomes active
again, and the wiring disconnection is detected.
 

Measures to take when an alert occurs
The main body and the option stop immediately.
 

Estimated abnormal parts
• Fusing unit
• Printer control board (PRCB)
• Fusing heater lamp/4 (L4)
• Fusing temperature sensor/4 (TH4)
• Thermostat/3 (TS3)
 

Correction

 

Solution
1. Check the connection between the rear side connector of the fusing unit and the main body side connector, and repair it when there is any abnormality.
2. Check the connector connections between TH4 and PRCB, and the wiring. Then repair it when there is any abnormality. (Wiring diagram: Main body (1/5): 10-H)
3. Check the conduction of TS3, and repair it when there is any abnormality.
4. Check the activation and deactivation by the L4 installation condition or the IO Check (45-00), repair it when there is any abnormality. (Wiring diagram: Main body (1/5): 3-J)
Note
▪ The output check on the IO check mode has restrictive conditions. Check the IO check mode list before the output check.
5. Check the installation condition of the TH4 and the temperature of the IO Check (45-16) and others, and adjust it when there is any abnormality. (Wiring diagram: Main body (1/5): 3-L)
6. Replace TH4.
7. Replace TS3.
8. Replace L4.
9. Replace PRCB.