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e-STUDIO520/600/720/850 TROUBLESHOOTING
March 2005 © TOSHIBA TEC
5 - 144
Note:
Note:
1. Toner density correcting method
Change the setting value 'Toner density life correction setting (08-414)' (6 is the default setting.)
0: Appox. 0.75% lower than the current value
1: Appox. 0.50% lower than the current value
2: Appox. 0.25% lower than the current value
3: The current value (Default setting)
4: Appox. 0.15% higher than the current value
5: Appox. 0.25% higher than the current value
6: Appox. 0.50% higher than the current value
7: Appox. 0.75% higher than the current value
<Caution for correction>
When increasing or decreasing the toner density too much, the image may become poor or the
life of developer material, cleaner, photoconductive drum and fuser unit, etc. may shorten. There-
fore it is not recommended to correct (to shift) the toner density basically. If it is shifted, make
sure that the image may be improper in a few minutes after shifting.
Developer bias output
9
Is the setting value proper?
Is the developer bias output normal?
Replace the high-voltage transformer
with a new one and print out a test
chart.
If any abnormal image appears,
check the harness connection
between the LGC board and the
high-voltage transformer, power sup-
ply and stain on the main charger
wire.
Decreasing toner density
10
Is the Auto-toner sensor connected
correctly?
Check the connection of the connec-
tor of the Auto-toner sensor.
11
Is the toner density low?
Correct the toner density.
(Note 2: See 'Toner density correct-
ing method'.)
Image quality sensor/ Sur-
face potential sensor
12
Are the image quality sensor and the
surface potential sensor normal?
Check the performance of the image
quality sensor and the surface poten-
tial sensor. (See the trouble shooting
related with the image quality con-
trol.)
Main charger
13
Is the main charger dirty?
Clean or replace it.
Defective area
Step
Check items
Prescription
Содержание E-STUDIO520
Страница 2: ... 2005 TOSHIBA TEC CORPORATION All rights reserved ...
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Страница 24: ...e STUDIO520 600 720 850 SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES March 2005 TOSHIBA TEC 1 12 ...
Страница 200: ...e STUDIO520 600 720 850 ERROR CODE AND SELF DIAGNOSTIC MODE March 2005 TOSHIBA TEC 2 176 ...
Страница 288: ...e STUDIO520 600 720 850 ADJUSTMENT March 2005 TOSHIBA TEC 3 88 ...
Страница 309: ...March 2005 TOSHIBA TEC e STUDIO520 600 720 850 PREVENTIVE MAINTENANCE PM 4 21 4 Fig 4 11 Finisher MJ 1027 1028 P1 P2 ...
Страница 540: ...e STUDIO520 600 720 850 POWER SUPPLY UNIT March 2005 TOSHIBA TEC 7 6 ...
Страница 586: ...e STUDIO520 600 720 850 DATA CLONING with USB STORAGE DEVICE March 2005 TOSHIBA TEC 9 22 ...
Страница 588: ...e STUDIO520 600 720 850 WIRE HARNESS CONNECTION DIAGRAMS March 2005 TOSHIBA TEC 10 2 ...
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