Horizontal Stripes; Light Vertical Steaks And Bands On One Color Image - Brother MFC-9130CW Service Manual

■ Horizontal stripes

<User Check>
Step
1 Dirt on charged electrode
2 Scratch and dirt on fuser unit
3 High-voltage power supply
PCB failure

■ Light vertical steaks and bands on one color image

<User Check>
- Clean the inside of the machine and the corona wire of each drum unit for all four colors.
(Refer to fig. 2-7 (P2-50)
- Check if dust adheres to the area of the toner cartridge corresponding to the location where
the white vertical streak appears.
- Refer to the User's guide and remove the dirt on the exposure drum using a cotton swab.
- Replace the drum unit or toner cartridge with a new one.
- Clean the LED ASSY.
Step
1 Condensation
2 LED ASSY failure
- Clean the corona wire of each drum unit for all four colors.
- This symptom might stop occurring after making several prints.
- Refer to the User's guide and remove the dirt on the exposure drum
using a cotton swab.
- Replace the drum unit or toner cartridge with a new one.
Cause
and fig. 2-8 (P2-51))
Cause
2-95
Remedy
Wipe dirt off.
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Remedy
Print several pages or leave the machine for
about two hours with the power turned ON.
Replace the LED ASSY.
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