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e-STUDIO520/600/720/850 TROUBLESHOOTING
March 2005 © TOSHIBA TEC
5 - 140
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.
Main charger
12
Is there any foreign object on the
charger?
Remove it.
13
Is the charger dirty or deformed?
Clean or replace the main charger
wire and grid.
Main charger output
14
Is the setting value proper?
Is the main charger 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.
Developer bias output
15
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.
Transfer belt
16
Is there any foreign object or fiber,
etc. on the belt surface?
Remove it.
Defective area
Step
Check items
Prescription
Содержание E-STUDIO520
Страница 2: ... 2005 TOSHIBA TEC CORPORATION All rights reserved ...
Страница 6: ......
Страница 12: ......
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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