e-STUDIO520/600/720/850 TROUBLESHOOTING March 2005 © TOSHIBA TEC
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7) Blank copy
Fig.5-7
Defective area Step Check items Prescription
Bias supply connector 1 Is the connector inserted properly? Insert the connector properly.
High-voltage transformer
(Transfer charger, Devel-
oper bias)
2 Is the high-voltage transformer out-
put defective?
Replace the transformer.
3 Are the connectors of the high-volt-
age harness securely connected? Is
the harness open circuited?
Reconnect the harness securely.
Replace the high-voltage harness.
Developer unit 4 Is the developer unit installed prop-
erly?
Check and correct the engaging con-
dition of the developer unit gears.
5 Do the developer sleeve and mixers
rotate?
Check and fix the drive system of the
developer unit.
6 Is the developer material smoothly
transported?
Remove the foreign matter from the
developer material.
Drum 7 Is the drum rotating? Check the drive system of the drum.
CCD, SLG, SYS, LGC
boards and harnesses
8 Are the connectors securely con-
nected?
Check if the harnesses connecting
the boards are open circuited.
Connect the connectors securely.
Replace the harness.
Feeding direction
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