iv Service Manual
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
Paper Feed Problem, Envelope+ Feeder/
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