Symptom

SC570-00 (fusing belt smoothing roller operation error)

How to isolate the cause of the problem

Execute a forced fusing belt smoothing operation (SP1-133-110).

If the SC occurs, do Procedure 1.

If the SC does not occur, do Procedure 2.

Solution

Procedure 1

The goal of this procedure is to verify the parts (gear, feeler, sensor, harness, motor) that may be damaged or not connected properly, causing the SC.

  1. Set the value in SP1-133-120 (Fixed Operation Time: Manual) to “1”.
  2. Execute SP1-133-110 (Manual Smoothing: Exe).
  3. Set the value in SP1-133-120 (Fixed Operation Time: Manual) back to “180”.
  4. Check if the gear [A] rotates.

    If the gear rotates,
    • Smoothing roller contact/separate Gear
    • Smoothing roller contact/separate Feeler
    • Smoothing roller contact/separate Sensor
    may be damaged.
    If the gear DOES NOT rotate,
    • Harness
    • Motor
    may be damaged or its connection is loose.
  5. Replace or fix the affected part(s) accordingly to complete the procedure.

Procedure 2

The goal of this procedure is to verify if the SC is caused by an incorrectly positioned feeler, which may be caused by excess load put on the cam.

  1. Open the upper guide plate [A] of the fusing unit and locate the belt smoothing roller contact/separate feeler [B]. If the cut-out on the feeler is not visible, do Procedure 3.

    * The top part of the fusing unit shown in this photo is gray because the unit is of the prototype.

    Incorrect

    Correct

    Cut-out [A] on the feeler is visible.

    Cut-out on the feeler is not visible.

    Continue with the next step.

    Do Procedure 3.

  2. Check if the brackets [A] and/or [B] are deformed.
    If deformed, replace the fusing unit to complete the procedure.
    If the brackets are not deformed, excess load on the cam may be the problem. Do the next step.
  3. Apply Fluotribo grease to the sliding surfaces [C] and [D] of the brackets [A] and [B]. Grease amount: 5 ± 1 mm in diameter (0.1 to 0.4 gm)

Procedure 3

The goal of this procedure is to reconfirm proper operation of the belt smoothing roller.

  1. Set the value in SP1-133-120 (Fixed Operation Time: Manual) to “1”.
  2. Execute SP1-133-110 (Manual Smoothing: Exe).
  3. Set the value in SP1-133-120 (Fixed Operation Time: Manual) back to “180”.
  4. Check if the SC occurs.
    If it does not occur, repeat the above steps 1 through 3 three times and check if the SC still does not occur to confirm the effect.
    If it does occur, excess load on the cam may be the problem. Do Procedure 2.