Toshiba e-STUDIO520 Service Handbook page 497

7) Blank copy
Defective area
Bias supply connector
High-voltage transformer
(Transfer charger, Devel-
oper bias)
Developer unit
Drum
CCD, SLG, SYS, LGC
boards and harnesses
© 2005 - 2007 TOSHIBA TEC CORPORATION All rights reserved
Fig. 5-7
Step Check items
1 Is the connector inserted properly?
2 Is the high-voltage transformer out-
put defective?
3 Are the connectors of the high-volt-
age harness securely connected? Is
the harness open circuited?
4 Is the developer unit installed prop-
erly?
5 Do the developer sleeve and mixers
rotate?
6 Is the developer material smoothly
transported?
7 Is the drum rotating?
8 Are the connectors securely con-
nected?
Check if the harnesses connecting
the boards are open circuited.
5 - 135
Prescription
Insert the connector properly.
Replace the transformer.
Reconnect the harness securely.
Replace the high-voltage harness.
Check and correct the engaging con-
dition of the developer unit gears.
Check and fix the drive system of the
developer unit.
Remove the foreign matter from the
developer material.
Check the drive system of the drum.
Connect the connectors securely.
Replace the harness.
e-STUDIO520/523/600/603/720/723/850/853
TROUBLESHOOTING
5