Toshiba e-studio 2555c, Service Manual, Page: 870 / 1558

e-STUDIO2555C/3055C/3555C/4555C/5055C © 2012-2013 TOSHIBA TEC CORPORATION All rights reserved
ERROR CODE AND TROUBLESHOOTING
8 - 314
8.5.22 Faded image (low density)
Fig.8-27
Cause/Section Step Check item Measures
Toner empty
Auto-toner
circuit 1 Is the “ADD TONER” symbol
blinking? Replace the toner cartridge.
2 Is there enough toner in the
cartridge? Check the auto-toner circuit function.
3 Is the toner density of developer
material too low?
Toner motor 4 Is the toner motor malfunctioning? Check the motor drive circuit.
Toner
cartridge 5 Are there any abnormalities in the
toner cartridge? Replace the toner cartridge.
Developer
material 6 Has the developer material reached
its PM life? Replace developer material.
Developer unit 7 Is the magnetic brush in proper
contact with the drum? Check the developer unit installation.
Check the doctor-sleeve gap and
pole position.
Main charger 8 Is the main charger dirty? Clean it or replace the needle
electrode.
Drum 9 Is there film forming on the drum
surface? Clean or replace the drum.
10 Has the drum reached its PM life? Replace the drum.
Transfer unit 11 Has the transfer belt, 1st or 2nd
transfer roller reached its PM life? Replace the transfer belt, 1st or 2nd
transfer roller.
High-voltage
transformer
(developer
bias) 12 Is the high-voltage transformer
output settings improper? Adjust the high-voltage transformer
output.
13 Are the connector of the high-voltage
harness securely connected? Is the
harness open circuited? Reconnect the harness securely.
Replace the high-voltage harness.
Feeding direction