Brother MFC-J3520 Service Manual page 5

2.1 Cross-section Drawings......................................................................................... 2-3
2.1.1 Document scanning ...................................................................................... 2-3
2.1.2 Printer part .................................................................................................... 2-4
2.2 Document Feeding Path/Recording Paper Feeding Path ..................................... 2-5
2.2.1 Document Feeding Path ............................................................................... 2-5
2.2.2 Recording Paper Feeding Path..................................................................... 2-5
2.3 Parts Names and Functions .................................................................................. 2-6
2.4 Block Diagram ....................................................................................................... 2-8
2.5 Components .......................................................................................................... 2-9
3 ERROR INDICATION................................................................................................... 2-10
3.1 Error Code ........................................................................................................... 2-10
3.2 Error Messages .................................................................................................. 2-15
3.3 Communications Error ........................................................................................ 2-17
4 TROUBLESHOOTING ................................................................................................. 2-21
4.1 Error Cause and Solutions .................................................................................. 2-21
4.2 Recording Paper Feeding Problems ................................................................... 2-54
4.2.1 Paper is not fed from paper tray.................................................................. 2-54
4.2.2 Paper is not fed from manual feed slot ....................................................... 2-55
4.2.3 Two or more sheets of paper fed at a time ................................................. 2-56
4.2.4 Paper feeding at an angle ........................................................................... 2-56
4.2.5 Recording paper jam................................................................................... 2-57
4.2.6 Prints only single side of the paper when duplex-printing ........................... 2-60
4.3 Print-image Problems .......................................................................................... 2-61
4.3.1 Defective images......................................................................................... 2-61
4.3.2 Print-image problems .................................................................................. 2-62
4.4 Software-related Problems .................................................................................. 2-72
4.4.1 Cannot print data......................................................................................... 2-72
4.5 Network Problems ............................................................................................... 2-72
4.5.1 Cannot make a print through network connection....................................... 2-72
4.6 Control Panel Problems....................................................................................... 2-73
4.6.1 No display on LCD ...................................................................................... 2-73
4.6.2 No display on LED ...................................................................................... 2-73
4.6.3 The control panel does not work ................................................................. 2-73
4.6.4 Touch panel inoperative.............................................................................. 2-73
4.7 Document Feeding Problems .............................................................................. 2-74
4.7.1 Document can not be fed ............................................................................ 2-74
4.7.2 Document double feeding ........................................................................... 2-74
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