Toshiba ESTUDIO170F, Service Manual

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11
January 2005 © TOSHIBA TEC e-STUDIO170F Troubleshooting
11 - 61
[ 8 ] Black dots / white dots
[ 9 ] Stained (print side or back side)
Step Check points Solutions
1 Is the recording paper moistened. Replace the recording paper and advice the cus-
tomer of correct recording paper storage.
2 Are the paper transport mechanism and/or feed
rollers (pickup roller, paper feed roller or exit
roller) dirty?
Clean the paper transport section and rollers.
3 Do the black or white dots repeat at 94.2 mm
intervals?
Replace the drum unit because the drum is dirty or
damaged, or replace the fuser because the heat
roller is dirty or damaged.
4 Do the black or white dots repeat at 51.8 mm
intervals?
Replace the toner cartridge because the sleeve
roller is dirty or damaged.
5 Do the black or white dots repeat at 50.6 mm
intervals?
Replace the transfer roller because it is dirty or
damaged.
6 Are black or white dots repeat at 75.3 mm inter-
vals?
Replace the pressure roller because it is dirty or
damaged.
Step Check points Solutions
1 Is the heat roller dirty or damaged? Clean or replace the fuser.
2 Is the pressure roller dirty or damaged? Clean or replace the pressure roller.
3 Is the transfer roller dirty or damaged? Clean or replace the transfer roller.
4 Are the feed rollers (pickup roller, paper feed
roller or exit roller) dirty?
Clean the rollers.
5 Is the paper transport mechanism dirty? Clean the paper transport section using a dry cloth.
6 If no problem is found in the steps above, the
drum unit or fuser may be defective.
Replace the drum unit and then the fuser.