Error Code: C-3904* Follow

Code

C-3904*

Classification

Main body: Fusing belt edge low temperature abnormality (hardware detection)

Cause

The fusing temperature sensor/2 (TH2) detects an error signal continuously for a specified period of time.

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/2 (L2)
• Fusing temperature sensor/2 (TH2)
• Thermostat/2 (TS2)

Correction

 

Note

• The message "Please call service" is displayed on the panel.

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 TH2 and PRCB, and the wiring. Then repair it when there is any abnormality. (Wiring diagram: Main body (1/5): 8-H)
3. Check the conduction of the TS2, and repair it when there is any abnormality.
4. Check the activation and deactivation by the installation condition of L2 and L3, or the IO Check (45-00), repair it when there is any abnormality. (Wiring diagram: Main body (1/5): 3-G)
5. 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 TH2 and the temperature of the IO Check (45-12) and others, and adjust it when there is any abnormality. (Wiring diagram: Main body (1/5): 3-H)
6. Replace TH2.
7. Replace TS2.
8. Replace the fusing heater lamp assy/Up.
9. Replace PRCB.

Faulty part isolation DIPSW

Control during the detachment