Brother 7550MC All in One Printer User Manual

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TROUBLESHOOTING PROCEDURES

16-5

MFC 4550/6550MC/7550MC

OP-US-5.0

Other Problems

When the Receiving Party Says the Picture is Not Clear

Sometimes the resolution mode you chose when you sent your fax may not have been

appropriate. Send the fax again, but try using the FINE or SUPERFINE mode. Also,

your machine’s scanner may be dirty, so try cleaning it. (See page 14-1)

When the Receiving Party Says Vertical Streaks Appear on the Faxes They

Receive:

Your machine’s scanner may be dirty or the receiving party’s printer head may be

dirty. Clean your scanner, (See page 14-1) and make a copy to check if the problem

was caused by your machine.

Vertical Streaks Appear on the Faxes You Receive

Sometimes you may see vertical streaks on the faxes you receive. Either your

machine’s primary corona wire for printing may be dirty, or the sending party’s fax

scanner may be dirty. Clean your primary corona wire. (See page 14-3) Make a copy

to see if the vertical streaks are still there.

Vertical Streaks Appear in Copies

Sometimes you may see vertical streaks on your copies.

Either the scanner or the primary corona wire for printing is dirty. Clean them both.

(See page 14-1~3)

If the Printed Pages are Still Blurred at the Center or Either Edge as Below

First, make sure that the printer is placed on a flat, horizontal surface.

If the problem still occurs, remove the drum unit with the toner cartridge installed.

Hold the unit horizontally with both hands and tap it firmly against a flat surface 3

or 4 times. Reinstall the drum/toner unit and try printing again. If the print quality

is acceptable, you may continue using this drum unit. If the print quality is not

acceptable replace the drum unit. If streaks still occur, please contact Brother

Customer Service or your local Authorized Service Center for further assistance.

Horizontal Streaks

You may get a fax with horizontal streaks or with missing lines. Usually this is caused

by a poor telephone connection. Ask the other party to send the fax again.

Poor Printing Quality

If the printing quality is not at an acceptable level, please replace your drum unit with

a new one.

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