Toshiba e-STUDIO351c Service Handbook page 526

19)Faded image (low density)
Cause/Section Step
Toner empty 1
Auto-toner circuit
2
3
Toner motor 4
Toner cartridge 5
Developer mate- 6
rial
Developer unit 7
Main charger 8
Drum 9
10
Transfer unit 11
High-voltage 12
transformer
(developer bias)
13
e-STUDIO281c/351c/451c TROUBLESHOOTING
Check items
Is the "ADD TONER" symbol blinking?
Is there enough toner in the cartridge?
Is the toner density of developer material
too low?
Is the toner motor malfunctioning?
Are there any abnormalities in the toner
cartridge?
Has the developer material reached its
PM life?
Is the magnetic brush in proper contact
with the drum?
Is the main charger dirty?
Is there film forming on the drum surface? Clean or replace the drum.
Has the drum reached its PM life?
Has the transfer belt, 1st or 2nd transfer
roller reached its PM life?
Is the high-voltage transformer output set-
tings improper?
Are the connector of the high-voltage har-
ness securely connected? Is the harness
open circuited?
Fig. 5-19
Replace the toner cartridge.
Check the auto-toner circuit function.
Check the motor drive circuit.
Replace the toner cartridge.
Replace developer material.
Check the developer unit installation.
Check the doctor-sleeve gap and pole
position.
Clean it or replace the charger wire.
Replace the drum.
Replace the transfer belt, 1st or 2nd trans-
fer roller.
Adjust the high-voltage transformer out-
put.
Reconnect the harness securely.
Replace the high-voltage harness.
5 - 134
Measures
June 2005 © TOSHIBA TEC