Toner Dam Ghosting Defect - Xerox WorkCentre 7132 Service Documentation

Toner Dam Ghosting Defect

Figure 1 Toner Dam Ghosting Defect Sample (VA-0011)
Cause
Toner dam ghosting appears as white streaks 105mm from the lead edge. The white streak is
more visible in magenta.
Corrective Action
1. Print Test Pattern 59, 40% coverage, Magenta, output 2 or more 11 x 17 sheets.
Image Quality
Toner Dam Ghosting Defect
2. Check whether white spots or streaks appear in the Magenta halftone on the 2nd and lat-
ter outputs.
3. Tone Down the Developer ADJ 9.1.0, if the BKG or high solid density occurs. (Use Test
Pattern 52)
4. Check NVM 753-552. The stored value is 0-9. (Table 1)
NVM value stored in NVM address to
753-552
0
1
2
3
4
5
6
7
8
9
5. Change NVM Values by increments of -5. (ex. In the case 753-552 is 5, change 753-547
from 0 to -5 first)
6. Check the print image. If the defect is still present, increment the NVM value again.
Never increment more than the value listed in the Limited Value column in Table 1.
January 2007
3-36
Table 1
Limited
access Default Value Value
153-542 0 -20
153-543 -20 -40
153-544 -20 -40
153-545 -10 -30
153-546 0 -20
153-547 0 -20
153-548 0 -20
153-549 0 -20
153-550 0 -20
153-551 0 -20
CAUTION
Reversion 4.0
WorkCentre 7132