>>Problem: unclear printing.

Potential causes: 

Ø  Print port may have defect.

Ø  Printer driver mismatching.

Ø  Data switch is defective.

Ø  Your document may be attack by virus.

Potential solutions:

Ø  Change the printer port.

Ø  Install exact printer.

Ø  Change data switch.

Ø  Scan HDD with latest anti-virus.