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2A1/2
(13) Paper creases. ............................................................................................................................. 1-5-20
(14) Offset occurs. ............................................................................................................................... 1-5-20
(15) Image is partly missing. ................................................................................................................ 1-5-21
(16) Fixing is poor. ............................................................................................................................... 1-5-21
(17) Image is out of focus. ................................................................................................................... 1-5-21
(18) Image center does not align with the original center. ................................................................... 1-5-22
(19) Image contrast is low (carrier scattering). ..................................................................................... 1-5-22
1-5-4 Electrical problems ............................................................................................................................. 1-5-23
(1) The machine does not operate when the main switch is turned on. ............................................. 1-5-23
(2) The drive motor does not operate. ............................................................................................... 1-5-23
(3) The scanner motor does not operate. .......................................................................................... 1-5-23
(4) The toner feed motor does not operate. ....................................................................................... 1-5-23
(5) Cooling fan motor does not operate. ............................................................................................ 1-5-23
(6) Original paper feed motor does not operate. ................................................................................ 1-5-24
(7) ST feed motor does not operate. .................................................................................................. 1-5-24
(8) The registration clutch does not operate. ..................................................................................... 1-5-24
(9) The paper feed clutch does not operate. ...................................................................................... 1-5-24
(10) The ST paper feed clutch does not operate. ................................................................................ 1-5-24
(11) The bypass paper feed clutch does not operate. ......................................................................... 1-5-24
(12) The cleaning lamp does not turn on. ............................................................................................ 1-5-24
(13) The exposure lamp does not turn on. ........................................................................................... 1-5-24
(14) The exposure lamp does not turn off. ........................................................................................... 1-5-24
(15) The fixing heater does not turn on (C610). ................................................................................... 1-5-24
(16) The fixing heater does not turn off. ............................................................................................... 1-5-25
(17) Main charging is not performed (C510). ....................................................................................... 1-5-25
(18) Transfer charging is not performed. ............................................................................................. 1-5-25
(19) No developing bias is output. ....................................................................................................... 1-5-25
(20) The copier scans the contact glass when originals are loaded on the DF. .................................. 1-5-25
(21) A paper jam in the paper feed, paper conveying or fixing section is indicated
when the main switch is turned on. .............................................................................................. 1-5-25
paper conveying cover and optional drawer left cover are closed. ............................................... 1-5-26
(23) Others. .......................................................................................................................................... 1-5-26
1-5-5 Mechanical problems ......................................................................................................................... 1-5-27
(1) No primary paper feed. ................................................................................................................. 1-5-27
(2) No secondary paper feed. ............................................................................................................ 1-5-27
(3) Skewed paper feed. ...................................................................................................................... 1-5-27
(4) The scanner does not travel. ........................................................................................................ 1-5-27
(5) Multiple sheets of paper are fed at one time. ................................................................................. 1-5-27
(6) Paper jams. .................................................................................................................................. 1-5-27
(7) Toner drops on the paper conveying path. ................................................................................... 1-5-27
(8) Abnormal noise is heard. .............................................................................................................. 1-5-27
1-6 Assembly and Disassembly
1-6-1 Precautions for assembly and disassembly ......................................................................................... 1-6-1
(1) Precautions ..................................................................................................................................... 1-6-1
(2) Running a maintenance item .......................................................................................................... 1-6-2
1-6-2 Paper feed section ............................................................................................................................... 1-6-3
(1) Detaching and refitting the paper feed pulleys ............................................................................... 1-6-3
(2) Detaching and refitting the ST paper feed pulleys and
ST paper conveying roller (option) ................................................................................................. 1-6-5
(2-1) Detaching and refitting the ST paper feed pulleys ................................................................. 1-6-5
(2-2) Detaching and refitting the ST paper conveying roller ........................................................... 1-6-8
(3) Detaching and refitting the bypass paper feed pulley ..................................................................... 1-6-9
(4) Adjustment after roller and clutch replacement ............................................................................ 1-6-12
(4-1) Adjusting the leading edge registration of image printing .................................................... 1-6-12
(4-2) Adjusting the leading edge registration for memory image printing ..................................... 1-6-13
(4-3) Adjusting the center line of image printing ........................................................................... 1-6-14
(4-4) Adjusting the margins for printing ........................................................................................ 1-6-15
(4-5) Adjusting the amount of slack in the paper .......................................................................... 1-6-16
1-1-2
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