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ERROR CODE AND TROUBLESHOOTING
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1. Toner density correcting method
Change the setting value 'Toner density life correction setting (08-2816)' (6 is the default setting.)
0: Approx. 0.75% lower than the current value
1: Approx. 0.50% lower than the current value
2: Approx. 0.25% lower than the current value
3: The current value (Default setting)
4: Approx. 0.15% higher than the current value
5: Approx. 0.25% higher than the current value
6: Approx. 0.50% higher than the current value
7: Approx. 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.
Therefore 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
supply and stain on the main charger
wire.
Decreasing toner density 10 Is the Auto-toner sensor connected
correctly?
Check the connection of the
connector of the Auto-toner sensor.
11 Is the toner density low? Correct the toner density.
(Note 2: See 'Toner density
correcting method'.)
Image quality sensor/
Surface 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
potential sensor. (See the trouble
shooting related with the image
quality control.)
Main charger 13 Is the main charger dirty? Clean or replace it.
Defective area Step Check items Prescription
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