Brother HL-S7000DN Service Manual page 150

■ Vertical streaks
<User Check>
Step
1 Dirt in the paper feed system
2 Ink head failure
3 Engine PCB failure
4 Main PCB failure
■ White vertical streaks
<User Check>
Step
1 Paper dust in the head and
platen
2 Dirt in the paper feed system
3 Dirt in the paper dust cleaning
roller
4 Head flat cable connection
failure
5 Ink is adhered to the surface
around the head
6 Ink head failure
7 Ink full sensor failure
8 Engine PCB failure
9 Main PCB failure
- This symptom might stop occurring after making several prints.
- Perform head cleaning.
Cause
- Perform head cleaning.
Cause
2-122
Remedy
Refer to "Cleaning procedure using the
cleaning sheet" and perform cleaning.
Replace the ink head.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Remedy
Perform special high-speed purge 2 (HP2) to
remove paper dust in the head and platen.
Refer to "Cleaning procedure using the
cleaning sheet" and perform cleaning.
Refer to "Cleaning of the paper dust cleaning
roller" and clean the dirt in the paper dust
cleaning roller.
Reconnect the head flat cable.
Clean the head. (Refer to
Replace the ink head.
Replace the sub tank ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Fig. 2-8 (P2-121))
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