Brother International MFC 8890DW Service Manual - Page 148

■ Paper jam at the duplex scanning - Use the A4 or Letter size. - Use the document without warpage. - Use the paper which is not so too thin. (thickness of paper) Step 1 2 3 4 5 6 7 Cause Check Result Remedy Foreign object inside ADF Is there a foreign object inside ADF? Yes Remove the foreign object. Switch back sensor actuator catching on some position Does the switch back sensor actuator move smoothly? Re-assembly the switch No back sensor actuator. Each flap catching Does the each flap move on some position smoothly? No Re-assembly the flap. Switch back sensor malfunction Does the switch back sensor move smoothly? (Check it following the procedure described in "Maintenance mode 32") Replace the switch back sensor. No Flap A failure Does the flap A move smoothly? Is it damaged? No Replace the flap A. S/B solenoid ASSY failure Does the S/B solenoid ASSY move smoothly? No Replace the S/B solenoid ASSY. SB roller failure Does the SB roller move smoothly? Is it damaged? No Replace the SB roller. 11.4 Wrinkles - Check if the document is loaded into the ADF correctly. - Check whether the document guide matches the document size. - Check whether the document does not curl. Step 1 Cause Check Feed roller positioning section failure Is each feed roller attached correctly section? (Check the feed roller position in Fig. 5-56) Result Remedy Re-assembly each feed roller to the correctly Yes section. 3-76 Confidential