FU No.

Fuse

Function

Symptom, Cause, Action

FU101

Ceramic tube Fuse

Overcurrent protection for the Fusing Heater circuit

Symptom

  • Fusing errors occur.

Cause

  • The harness of the Fusing became shorted with GND.
  • Broken Fusing circuit in the PSU

Action

  • Replace the PSU

FU102

Ceramic tube Fuse

Overcurrent protection for the Power circuit

Symptom

  • The power cannot be turned on.

Cause

  • Varistor 4 has shorted out because of excess voltage, which resulted in excess current flow, causing a FU102 blowout.
  • Primary circuit of the PSU is shorted with GND.
  • Broken the Primary circuit of PSU

Action

  • Replace the PSU

FU203

Microfuse

Protection for the secondary side Harness of the +24V _LPS output

Symptom

  • Engine does not start even though the power of the main body is turned on.

Cause

  • The overcurrent protection equipment of the PSU suffered a breakdown and the +24V_LPS output became shorted with GND.

Action

  • Replace the PSU

FU204

Microfuse

Protection for the secondary side Harness of the +24VS_LPS output

Symptom

  • Problems occur, including Process Control error, Jam; an image is not generated; and Toner supply is not carried out.

Cause

  • The overcurrent protection equipment of the PSU suffered a breakdown and the +24VS_LPS output became shorted with GND.

Action

  • Replace the PSU