Canon iR C6800 Series Service Manual page 892

Chapter 13
13.3.2.2 Light Image / Weak Density
13.3.2.2.1 Overall light image on black area, uneven image
0006-2424
[ Inspected by Canon Inc. ]
Cause
As a result of inspection, it was found that this symptom occurred for the following reasons: The black developing
ass'y was not supplied with toner because the 3P connector of the toner level sensor inside the black developing ass'y
was not securely fitted. Finally, the toner level became low and light image or uneven image occurred.
Field Remedy
1. Make sure that bit8 in service mode [COPIER> DC CON> I/O> P009] shows "1", which means that the toner
level sensor detects toner remaining.
2. Pull out the AP kit from the main unit and unplug/reinsert the 3P connector once again.
3. Check the service mode value in Step 1 once again. If bit8 shows "0", this symptom might have occurred because
of poor contact of the 3P connector. In such a case, the toner level is low, so replenish the black developing ass'y
with toner in service mode [COPIER> Function> INSTALL> TONER S> OK].
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