Brother MFC-9420CN

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Troubleshooting and routine maintenance

C - 17

Toner scatter or toner stain ■ Identify the colour causing the problem and replace that toner cartridge. (See

Replacing a toner cartridge on page C-29.)

■ Replace the OPC belt cartridge. (See Replacing the OPC belt cartridge

(OP-4CL) on page C-33.)

The colour of your printouts is not

what you expected

■ Check that the toner cartridges are installed properly.

■ Check that the toner cartridges are not empty. (See Toner empty message on

page C-29.)

■ Perform the calibration. (Menu/Set, 4, 4)

■ Adjust the colour by using the custom setting in the driver. Colours the

machine can print and colours you see on a monitor are different. The machine

may not be able to reproduce the colours on your monitor.

■ Check to make sure the recommended paper was used. (See Recommended

paper on page 2-1.)

All one colour Replace the OPC belt cartridge. (See Replacing the OPC belt cartridge (OP-4CL)

on page C-33.)

Shade on the transparency ■ Change to the recommended type of transparency, and then check that the

problem is solved.

■ Check that the media type mode is selected properly.

Incorrect coloured edges ■ Check that the OPC belt cartridge is installed properly.

■ Check that the transter belt cleaner is installed properly.

■ Replace the OPC belt cartridge. (See Replacing the OPC belt cartridge

(OP-4CL) on page C-33.)

■ Replace the transter belt cleaner. (See Replacing the transfer belt cleaner on

page C-38.)

Uneven density appears

periodically across the page

■ Check that the toner cartridges are installed properly.

■ Check that the OPC belt cartridge is installed properly.

■ Check that the transter belt cleaner is installed properly.

■ Check that the back cover is closed properly.

■ Check that the fusing unit is installed properly.

■ Replace the OPC belt cartridge. (See Replacing the OPC belt cartridge

(OP-4CL) on page C-33.)

Examples of poor print quality Recommendation

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Brother MFC-9420CN - Page 141