Toshiba ESTUDIO170F, Service Manual

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e-STUDIO170F Troubleshooting January 2005 © TOSHIBA TEC
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[ 5 ] Completely white
[ 6 ] Low image density, faint or blurred print
[ 7 ] Uneven or foggy background print
Step Check points Solutions
1 Is the drum unit or toner cartridge improperly
mounted?
Mount the drum unit and the toner cartridge prop-
erly.
2 Are the terminals of the toner cartridge and the
drum unit dirty or bent?
Clean the terminals using a dry cloth or repair them
using cutting pliers.
3 Is the development voltage terminal inside the
machine dirty or bent?
Clean the terminals using a cotton swab repair
them using cutting pliers.
4 Is the cable firmly connected with the following
paths?
• LSU - Main PBA (CN3, 8)
• HVPS (CN1) - Main PBA (CN15)
Insert the cable to the connector firmly.
5 Does the connector pin come off or is the cable
broken?
Replace the cable.
6 If no problem is found in the steps above, the
toner cartridge, LSU or PBA's may be defective.
Replace the toner cartridge, the LSU, the HVPS,
and then the main PBA.
Step Check points Solutions
1 Is the toner low? Replace the toner cartridge.
2 Is the recording paper moistened? Replace the recording paper and advise the cus-
tomer of correct recording paper storage.
3 Is the transfer roller dirty or damaged? Clean or replace the transfer roller.
4 Is the machine placed on a slanted surface? Place the machine on a flat surface.
5 Is the development voltage terminal inside the
machine dirty or bent?
Clean the terminals using a cotton swab repair
them using cutting pliers.
6 If no problem is found in the steps above, the
drum unit, toner cartridge or PBA's may be
defective.
Replace the drum unit, the toner cartridge, the
HVPS, and then the main PBA.
Step Check points Solutions
1 Is the machine placed on a slanted surface? Place the machine on a flat surface.
2 Is there any foreign material stuck to the feed
gears?
Clean the gears or replace the feed gear assembly.
3 Is the development voltage terminal inside the
machine dirty or bent?
Clean or correct the terminals.
4 If no problem is found in the steps above, the
drum unit, LSU or PBA's may be defective.
Replace the drum unit, the LSU, the HVPS, and
then the main PBA.