Service manual

Troubleshooting

4-20

Samsung Electronics

Abnormal Image Printing and Defective Roller

If abnormal image prints periodically, check the parts shown below.

Partial blank image

(periodic)

1. Develope roller scar or particle.

2. Scar or particle. (94 mm)

3. Transfer roller scar or particle .

(47 mm)

1~2. Replace toner cartridge.

3. Replace transfer roller.

Different image den-

sity

(left and right)

1. Charge roller’s pressure force unbalance

2. Dev. roller and OPC or Dev. roller and

blade’s pressure force unbalance

3. Transfer roller’s pressure force unbalance

of each side

1~2. Change toner cartridge

3. Check left and right spring of transfer roller

and the spring pressing the developer

inside the machine

Horizonral band 1. Unstable high voltage contact

2. Charge roller’s contamination

3. Contamination of heat roller

4. Malfunction of LSU

1. Clean each contact and check good con-

tact

2. Clean charge roller

3. Replace fuser unit

4. Check Main PBA.

NO Roller Abnormal image period Kind of abnormal image

1 OPC Drum 94.3 mm White spot. Black spot

2 Charge Roller 37.7 mm White spot. Black spot

3 Supply Roller 35.8 mm Horizontal dark band

4 Develope Roller 44.8 mm Horizontal dark band

5 Transfer Roller 57.8 mm Black side contamination/transfer fault

6 Heat Roller 82.5 mm Black spot, White spot

7 Pressure Roller 69.1 mm Black side contamination

Error Status Check Solution

Digital Printer