Samsung SCX-82x0 series Service Manual page 11

6.3.3 Cleaning the Regi roller ............................................................................................................ 6-23
6.3.4 Cleaning the tray1 feed roller ................................................................................................ 6-23
6.3.5 Cleaning the tray2 feed roller ................................................................................................ 6-24
6.3.6 Cleaning the DADF retard rubber pad ............................................................................ 6-25
6.3.7 Cleaning the DADF rollers ....................................................................................................... 6-26
6.3.8 Cleaning the ADF glass ............................................................................................................. 6-27
7. Troubleshooting ........................................................................................................................................... 7-1
7.1 Procedure for checking symptoms ............................................................................................... 7-1
7.1.1 System power-up sequence ...................................................................................................... 7-1
7.1.2 Pre-troubleshooting check list ................................................................................................. 7-2
7.2 Error code and Trobleshooting ...................................................................................................... 7-3
7.2.1 Error code and error message ............................................................................................. 7-A-3
7.2.2 Error Code Details ....................................................................................................................... 7-12
7.3 Image quality problems and solutions .................................................................................. 7-110
7.3.1 Vertical Lines ................................................................................................................................ 7-111
7.3.2 Horizontal Lines .......................................................................................................................... 7-112
7.3.3 White spot .................................................................................................................................... 7-113
7.3.4 Color or Black background ................................................................................................... 7-114
7.3.5 Blurred image .............................................................................................................................. 7-115
7.3.6 Uneven pitch and jitter image ............................................................................................. 7-116
7.3.7 Skewed image ............................................................................................................................. 7-117
7.3.8 Low image density .................................................................................................................... 7-118
7.3.9 Blank copy , Black copy .......................................................................................................... 7-119
7.3.10 Uneven density in sub scan direction (Horizontal band) ................................... 7-121
7.3.11 Uneven density in main scan direction (Vertical Band) ...................................... 7-122