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4039-1XX
Symptom Table ...............................................................................12
Banding .......................................................................................13
Background .................................................................................13
Black Page ..................................................................................15
Blank Page ..................................................................................16
Blurred or Fuzzy Print..................................................................17
Dead Machine .............................................................................17
Duplex .........................................................................................18
Fan (927 Error)............................................................................19
Fuser Theory ...............................................................................20
Fuser: 920, 921, or 922 Error ......................................................20
Fuser: 923 Error ..........................................................................21
Honeycomb .................................................................................21
Horizontal Void or Streak ............................................................22
LAN Problems .............................................................................22
Light Print ....................................................................................22
Network Card 977 Errors.............................................................23
Network Wrap Tests....................................................................23
Output Bin Sensor .......................................................................23
Operator Panel Problem..............................................................24
Paper Feed Problem, 500-Sheet Second Tray ...........................25
Paper Feed, Base Printer............................................................25
Paper Feed, Duplex Unit .............................................................26
100-Sheet Auxiliary Feeder.........................................................27
Printhead .....................................................................................27
Paper Size Sensing Problem ......................................................28
Regularly Spaced Marks .............................................................29
Residual Image ...........................................................................29
Random Marks ............................................................................30
Skew, all edges ...........................................................................30
Skew, top and bottom only ..........................................................30
Stalled (diamonds on display) .....................................................30
Vertical Void or Streak.................................................................31
iv
Service Manual
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