302

D

Charge roller bias leak

A charge roller bias leak signal was detected.

 Charge roller damaged

 High voltage supply board defective

 PCDU harness defective or disconnected

304

D

Charge roller bias correction leak

The charge roller bias correction is performed twice even if the maximum charge roller bias (-2000V) is applied to the roller.

 ID sensor defective

 Worn charge roller

 Charge roller damaged

320

D

Development roller bias leak

The development roller bias leak is detected for 60 ms after the high voltage has been supplied to the development unit.

 Development bias leak

 Broken harness

 Defective high voltage power supply, voltage supply

 Defective high voltage supply unit

324

D

Development paddle motor error

The machine detects a lock signal error from the development puddle motor for 2 seconds after the drum motor has turned on.

 Overload on the development puddle motor

 Defective development puddle motor

 Defective harness

 Defective IOB

350

D

ID sensor pattern test error

One of the following readings occurred 10 times in the ID sensor output when the ID sensor pattern was checked:

1) Vsp > 2.5V

2) Vsg < 2.5V

3) Vsp =0V

4) Vsg = 0V

 ID sensor connector defective

 Poor ID sensor connector connection

 I/O board (IOB) defective

 Poor writing of ID sensor pattern on the drum

 High voltage supply board defective

351

D

ID sensor Vsg test error

When the ID sensor was checked, the ID sensor output voltage is 5.0V while the LED current value is 0.

 ID sensor defective or dirty

 ID sensor connector defective

 Poor ID sensor connection

 I/O board (IOB) defective

 Scanning system defective

 High voltage supply board defective

 Defect at the ID sensor pattern writing area of the drum

355

C

Grayscale measurement error

When the grayscale control result is the maximum and it does not operate correctly and these cases are detected 15 times.

 ID sensor defective or dirty

 The life of ID sensor or photo conductor

 Shield glass dirty

360

D

TD sensor (Vt) error 1

The following condition occurs thirty times consecutively during printing. Vt is less than 0.5V or 4.8V or more

 TD sensor disconnected

 Harness between TD sensor and PCDU defective

 Defective TD sensor.

372

D

TD sensor adjustment error

Vts is less than 1.8V or 4.8V or more during TD sensor initialization.

 Heat seal not removed from a new developer pack

 TD harness sensor disconnected, loose or defective

 TD sensor defective

 Harness between TD sensor and drawer disconnected, defective

396

D

Drum motor error

The machine detects a lock signal error from the drum motor for 2 seconds after the drum motor turned on.

 Overload on the motor

 Defective drum motor

 Defective harness

 Defective IOB