Brother DCP-7090 Service Manual page 95

 Error code 6101
The new toner sensor detected that no toner cartridge was set.
<User Check>
• Set the toner cartridge correctly.
Step
1 New toner sensor PCB failure
High-voltage power supply PCB
2
failure
3 Main PCB failure
 Error code 6106
The new toner box sensor detected that no toner box was set.
<User Check>
• Set the toner box correctly.
Step
New toner box actuator coming
1 off or caught in some sections of
the machine
New toner box sensor failure
2
3 Main PCB failure
 Error code 6200
Detected that the drum unit was not set by detecting the electrodes current.
<User Check>
• Set the drum unit correctly.
Step
Dirt on the electrodes of the drum
unit and those of the machine
1
Dirt on the high-voltage power
2
supply PCB terminal
High-voltage power supply PCB
3
failure
4 Main PCB failure
Cause
Cause
Cause
2-55
Remedy
Replace the new toner sensor PCB ASSY.
Replace the high-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
Remedy
Reattach the new toner box actuator.
Replace the high-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
Remedy
Clean the electrodes of the drum unit and
those of the machine.
(Refer to Fig. 2-12 (P2-56)
(P2-56).)
Clean the high-voltage power supply PCB
terminal.
Replace the high-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
and Fig. 2-13
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