Brother DCP-1623W - Page 68

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 Confidential Confidential
 
4.4.14.4.111 BlacBlack horizontk horizontal stripesal stripes
Image defects which appear periodically may be caused by failure of rollers. Refer to theImage defects which appear periodically may be caused by failure of rollers. Refer to the
table below and determine the responsible roller based on the pitch at which defects appeartable below and determine the responsible roller based on the pitch at which defects appear
on the image.on the image.
4.4.14.4.122 White verWhite verticatical streaksl streaks
<User Check><User Check>
-- Clean the inClean the inside of the machside of the machine and the coroine and the corona wire of the drumna wire of the drum
unit.unit.
-- This problem may disappear This problem may disappear after printing multiple safter printing multiple sheets of paperheets of paper..
-- ReplaReplace the toner cce the toner cartridartridge with a new oge with a new one.ne.
-- ReplaReplace the drum uce the drum unit with a nnit with a new one.ew one.
SStteepp CCaauussee RReemmeeddyy
11
Dirt on electrodes of the drum unitDirt on electrodes of the drum unit
and those of the machineand those of the machine
Clean the electrodes of the drum unit andClean the electrodes of the drum unit and
those of the machine. (Refer tothose of the machine. (Refer to Fig. 1-7
Fig. 1-7andand
Fig. 1-8
Fig. 1-8.).)
22
Dirt on electrodes of the tonerDirt on electrodes of the toner
cartridge and those of the machinecartridge and those of the machine
Clean the electrodes of the toner cartridgeClean the electrodes of the toner cartridge
and those of the machine. (Refer toand those of the machine. (Refer to Fig. 1-7
Fig. 1-7
andand Fig. 1-8
Fig. 1-8.).)
33
Attachment failure of the FGAttachment failure of the FG
harness or FG plate (not groundedharness or FG plate (not grounded
correctly)correctly)
Retighten the screws to secure the FGRetighten the screws to secure the FG
harness or FG plate.harness or FG plate.
44 SSccrraattcch h oor r ddiirrt t oon n tthhe e hheeaat t uunniitt RReeppllaacce e tthhe e ffuusseer r uunniitt..
55
High voltage power supply PCBHigh voltage power supply PCB
failurefailure
Replace the high voltage power supply PCBReplace the high voltage power supply PCB
ASSY.ASSY.
66 MMaaiin n PPCCB B ffaaiilluurree RReeppllaacce e tthhe e mmaaiin n PPCCB B AASSSSYY..
PPaarrt t nnaammee DDiiaammeetteer r 
Pitch at which defectsPitch at which defects
appear in the imageappear in the image
DDeevveellooppeer r rroolllleerr ø ø 113 3 mmmm 2266..0 0 mmmm
TTrraannssffeer r rroolllleerr ø ø 113 3 mmmm 3388..0 0 mmmm
EExxppoossuurre e ddrruumm ø ø 224 4 mmmm 7755..4 4 mmmm
HHeeaat t rroolllleerr ø ø 225 5 mmmm 7788..5 5 mmmm
PPrreessssuurre e rroolllleerr ø ø 225 5 mmmm 7788..5 5 mmmm
<User Check><User Check>
-- Check thaCheck that there is no dust in the gap bet there is no dust in the gap between the tontween the toner cartridger cartridgee
and the drum unit.and the drum unit.
-- ReplacReplace the toner ce the toner cartridartridge with a new oge with a new one.ne.
-- Check the uCheck the usage environment of sage environment of the machine. Uthe machine. Using the machine sing the machine inin
hot-humid or cold-dry conditions can cause this problem.hot-humid or cold-dry conditions can cause this problem.
-- Check tCheck that the phat the paper is aper is not dampnot damp..
-- Leave the macLeave the machine for a whilhine for a while before prine before printing againting again..
-- ReplaReplace the drum unce the drum unit with a new it with a new one.one.
SStteepp CCaauussee RReemmeeddyy
11 LLaasseer r uunniit t ffaaiilluurree RReeppllaacce e tthhe e llaasseer r uunniitt..