Konica Minolta MAGICOLOR 2490mf Service Manual page 14

Field Service
15.4.1
15.4.13 19H: Abnormally low heating roller temperature ....................................... 242
15.4.14 1AH: Abnormally high heating roller temperature ..................................... 242
15.4.15 1BH: Faulty thermistor .............................................................................. 242
15.4.16 21H: Faulty OHP sensor ........................................................................... 243
15.4.17 23H: Faulty waste toner near full detection board..................................... 243
15.4.18 31H: IR cooling fan motor malfunction ...................................................... 244
15.4.19 101H: Scanner motor malfunction ............................................................ 244
15.4.20 102H: Faulty IR exposure lamp................................................................. 245
15.4.21 ENGINE INTERFACE: Communication error between engine controller.. 245
15.4.22 CONTROLLER: Controller internal error .................................................. 245
16. Power supply errors............................................................................................. 246
16.1 Machine is not energized at all (PU operation check) ...................................... 246
16.2 Control panel indicators do not light ................................................................. 246
16.3 Fusing heaters do not operate.......................................................................... 247
17. Miscellaneous errors ........................................................................................... 248
17.1 How to identify problematic part ....................................................................... 248
17.1.1 Initial check items 1................................................................................... 248
17.1.2 Initial check items 2................................................................................... 249
17.2 Solution............................................................................................................. 250
17.2.1 Scanner system: Blank copy or black copy............................................... 250
17.2.2 Scanner system: Low image density or rough image ............................... 251
17.2.3 Scanner system: Foggy background......................................................... 252
17.2.4 Scanner system: Black streaks or bands .................................................. 253
17.2.5 Scanner system: Black spots .................................................................... 254
17.2.6 Scanner system: White streaks or bands ................................................. 255
17.2.7 Scanner system: Uneven pitch ................................................................. 256
17.2.8 White lines in FD, white bands in FD, colored lines in FD,
and colored bands in FD........................................................................... 257
17.2.9 White lines in CD, white bands in CD, colored lines in CD,
and colored bands in CD .......................................................................... 258
17.2.10 Uneven density in FD ................................................................................ 259
17.2.11 Uneven density in CD ............................................................................... 260
17.2.12 Low image density .................................................................................... 261
17.2.13 Gradation reproduction failure................................................................... 262
17.2.14 Foggy background..................................................................................... 263
17.2.15 Poor color reproduction............................................................................. 264
17.2.16 Void areas, white spots ............................................................................. 265
......... 242
xi