Brother DCP-7090, Service Manual

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4.7.3 4.7.3 T Toner re oner replac placement mes ement message disp sage displayed on LC layed on LCD is not cleared D is not cleared
<User Check> <User Check>
•• Be sure t Be sure to set a ne o set a new toner c w toner cartrid artridge(or bo ge(or box). x).
•• Check th Check that the genui at the genuine toner ca ne toner cartridge rtridge(or box) is s (or box) is set. et.
4. 4.7. 7.4 4 Dr Drum um er erro ror r
<User Check> <User Check>
•• Clean Clean the co the corona w rona wire of ire of the dru the drum unit m unit..
•• Replac Replace the d e the drum un rum unit wit it with a new h a new one. one.
4.7.5 4.7.5 Drum re Drum replace placement mes ment message di sage display splayed on LCD is no ed on LCD is not clear t cleared ed
<User Check> <User Check>
•• Reset th Reset the drum co e drum counter ac unter according cording to the ma to the manual. nual.
S Stte ep p C Ca au usse e R Re em me ed dyy
1 1 N Ne ew w tto one ner r ac actu tua atto or r cco om miin ng g o offff R Re ea att tta acch h tth he e ne new w tton oner er a accttua uato torr..
2 2
Connection failure of the new Connection failure of the new
toner sensor PCB harness
toner sensor PCB harness
(Models without toner box)
(Models without toner box)
Reconnect the new toner sensor PCB Reconnect the new toner sensor PCB
harness.
harness.
3 3
Connection failure of the new Connection failure of the new
toner box sensor PCB harness
toner box sensor PCB harness
(Models with toner box) (Models with toner box)
Reconnect the new toner box sensor PCB Reconnect the new toner box sensor PCB
harness.
harness.
4 4
Connection failure of the Connection failure of the
toner box relay PCB harness
toner box relay PCB harness
(Models with toner box)
(Models with toner box)
Reconnect the toner box relay PCB harness. Reconnect the toner box relay PCB harness.
5 5
New toner sensor PCB New toner sensor PCB failure failure
(Models without toner box) (Models without toner box)
Replace the new toner sensor Replace the new toner sensor PCB ASSY PCB ASSY..
6 6
New toner box sensor PCB New toner box sensor PCB
failure
failure
(Models with toner box)
(Models with toner box)
Replace the new toner box sensor PCB Replace the new toner box sensor PCB
ASSY ASSY..
7 7
T Toner box relay oner box relay PCB failure PCB failure
(Models with toner box) (Models with toner box)
Replace the toner box relay Replace the toner box relay PCB ASSY PCB ASSY..
8 8
High-voltage power supply High-voltage power supply
PCB failure
PCB failure
Replace the high-voltage power supply PCB Replace the high-voltage power supply PCB
ASSY ASSY..
9 9 M Ma aiin n P PC CB B ffa aiillu urre e R Re ep plla acce e tth he e m ma aiin n P PC CB B A AS SS SY Y..
S Stte ep p C Ca au usse e R Re em me ed dyy
1 1
Dirt on the electrodes of the Dirt on the electrodes of the
drum unit and those of the
drum unit and those of the
machine
machine
Clean the electrodes of the drum unit and Clean the electrodes of the drum unit and
those of the machine. (Refer to
those of the machine. (Refer to Fig. 2-12 (P2- Fig. 2-12 (P2-
56) 56) and and Fig. 2-13 (P2-56) Fig. 2-13 (P2-56) .) .)
2 2
Dirt on the electrodes of the Dirt on the electrodes of the
high-voltage power supply
high-voltage power supply
PCB and those of the
PCB and those of the machine machine
Clean the electrodes of the high-voltage Clean the electrodes of the high-voltage
power supply PCB and those of the machine.
power supply PCB and those of the machine.
3 3
High-voltage power supply High-voltage power supply
PCB failure
PCB failure
Replace the high-voltage power supply PCB Replace the high-voltage power supply PCB
ASSY ASSY..
4 4 M Ma aiin n P PC CB B ffa aiillu urre e R Re ep plla acce e tth he e m ma aiin n P PC CB B A AS SS SY Y..
S Stte ep p C Ca au usse e R Re em me ed dyy
1 1 M Ma aiin n P PC CB B ffa aiillu urre e R Re ep plla acce e tth he e m ma aiin n P PC CB B A AS SS SY Y..