Brother International MFC 8890DW Service Manual - Page 112
PAPER FEEDING PROBLEMS, 4.1 No Feeding, 4.2 Double Feeding - pickup rollers
UPC - 012502622673
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4. PAPER FEEDING PROBLEMS Problems related to paper feeding are end user recoverable if following the User Check items. If the same problem occurs again, follow each procedure in the order of the number described in the Step column in the tables below. 4.1 No Feeding Step 1 2 3 4 5 6 7 8 9 10 Cause Check Result Remedy Dirt on PE sensor Is there paper powder in the PE sensor? Yes Clean the PE sensnor. Edge actuator Does the edge actuator catching on some move smoothly? position Re-assembly the edge No actuator. Roller holder Does the roller holder ASSY catching on ASSY move smoothly? some position Re-assembly the roller Yes holder ASSY. Registration front sensor failure Is the problem solved after replacing the registration front sensor PCB ASSY? Replace the registration Yes front sensor PCB ASSY. Separation pad or roller holder ASSY failure Is the surface of the separation pad or the pickup roller dirty or worn out? 1) Clean the surface of the separation pad or Yes pickup roller. 2) Replace the separation pad or pickup roller. Pressure plate gear damage Is the pressure plate gear damaged? Yes Replace the paper tray. T1 solenoid failure Does the T1 solenoid work correctly? No Replace the T1 solenoid. T1 solenoid pathway of the high-voltage power supply PCB broken Is the problem solved after replacing the highvoltage power supply PCB ASSY? Replace the high-voltage power supply PCB ASSY. Yes Main PCB failure Is the problem solved after replacing the main PCB ASSY? Replace the main PCB Yes ASSY. Main motor failure Is the problem solved after replacing the drive sub ASSY? Replace the drive sub Yes ASSY. 4.2 Double Feeding Step 1 Cause Check Result Remedy Separation pad or Is the surface of the Replace the PF kit. roller holder ASSY separation pad worn out? Yes failure 3-40 Confidential