Xerox DocuColor 12/DCCS50 Service Manual page 298

Y N
Set NVM to "1".
The value in NVM location 773-121 is between 5 and 95 (this number represents the per-
centage of room humidity).
Y N
Replace the Humidity Sensor (PL 7.1).
Record the ADC Target values from NVM locations 773-266 through 773-269 in Column 1 of
the table you prepared. If the Y, M, C, and K values are EQUAL to or LESS than 230, 230,
250, and 160 respectively, answer 'Yes.' If the value(s) are HIGHER than 230, 230, 250
and 160 respectively, answer 'No.'
Y N
Set NVM locations 773-266, 267, 268, and 269 to 230, 230, 250, and 160 respectively.
Then make 50 full-color copies of the top half of the Color Test Pattern on 8 1/2 X 11"/A4
paper to stabilize the IOT.
Record the Humidity Adjusted ADC Target value(s) for the problem color(s) from NVM loca-
tions 773-281 through 773-284 in Column 2 and the ADC Patch Readings from NVM locations
773-606 through 773-609 in Column 3. The value(s) in Column 3 is within +/- 30 bits from
the values in Column 2 for the problem color(s).
Y N
Make 50 full-color copies of the top half of the Color Test Pattern on 8 1/2 X 11" / A4 LEF
paper. Repeat as necessary until the ADC Patch value(s) for the problem color(s) is within
+/- 30 bits of the Humidity Adjusted ADC Targets. If the value(s) is not within this range
after making 250 copies, go to IQ 10 Low Image Density
Reselect MAX Setup. Select TRC Set UP/Toner Concentration Adjustment. Select TRC Con-
trol (dC922). Make a ProCon test pattern by pressing the Start button. Examine the copy for
mottle-like or non-uniform (spotty) density in the high-density patches. One of these defects
is present in the 100% patch (top row) for the problem color(s).
Y N
The BCO problem is resolved.
NOTE: DO NOT set the new value(s) for the ADC Targets below the following lower limits: 773-
266 = 150, 773-267 = 150, 773-268 = 170, and 773-269 = 100. For example, if reducing the
value of NVM location 773-266 by 50 bits would result in a value less than 150, you must not
exceed the 150 limit for that location.
Enter a new value(s) for the problem color(s) in the appropriate NVM location(s) that is 50 bits
less than the current value(s) of the ADC Targets. Then record the new value(s) in Column 1 on
one of the remaining tables you prepared. Make 50 full-color copies of the top half of color test
patter 82E10810 to stabilize the IOT. Next, record the Humidity Adjusted ADC Target value(s)
for the problem color(s) from NVM locations 773-281 through 773-284 in Column 2 and the
ADC Patch Readings from NVM locations 773-606 through 773-609 in Column 3. The
value(s) in Column 3 is within +/- 30 bits from the values in Column 2 for the problem
color(s).
Y N
Make 50 full-color copies of the top half of the Color Test Pattern on 8 1/2 X 11" / A4 LEF
paper. Repeat as necessary until the ADC Patch value(s) for the problem color(s) is within
+/- 30 bits of the Humidity Adjusted ADC Targets. If the value(s) is not within this range
after making 250 copies, go to IQ 10 Low Image Density
A
Image Quality
IQ 19 Bead Carryout RAP
A
Reselect MAX Setup. Select TRC Set UP/Toner Concentration Adjustment. Select TRC Con-
trol (dC922). Make a ProCon test pattern by pressing the Start button. Examine the copy for
mottle-like or non-uniform (spotty) density in the high-density patches. One of these defects
is present in the 100% patch (top row) for the problem color(s).
Y
NOTE: If the lower limit(s) for the problem color(s) location(s) has already been reached, go
directly to the end of this RAP and perform the corrective action steps.
NOTE: DO NOT set the new value(s) for the ADC Targets below the following lower limits: 773-
266 = 150, 773-267 = 150, 773-268 = 170, and 773-269 = 100.
Enter a new value(s) for the problem color(s) in the appropriate NVM location(s) that is 30 bits
less (C,M,Y) or 10 bits less (K) than the current value(s) of the ADC Targets. Then record the
new value(s) in Column 1 on one of the remaining tables you prepared. Make 50 full-color cop-
ies of the top half of color test patter 82E10810 to stabilize the IOT. Next, record the Humidity
Adjusted ADC Target value(s) for the problem color(s) from NVM locations 773-281 through
773-284 in Column 2 and the ADC Patch Readings from NVM locations 773-606 through 773-
609 in Column 3. The value(s) in Column 3 is within +/- 30 bits from the values in Column
2 for the problem color(s).
Y
RAP.
Reselect MAX Setup. Select TRC Set UP/Toner Concentration Adjustment. Select TRC Con-
trol (dC922). Make a ProCon test pattern by pressing the Start button. Examine the copy for
mottle-like or non-uniform (spotty) density in the high-density patches. One of these defects
is present in the 100% patch (top row) for the problem color(s).
Y
NOTE: Before performing the corrective action steps below, re-enter the original value(s) of the
ADC Targets for the problem color(s) in the appropriate NVM location(s). Make 50 full-color
copies of the top half of the Color Test Pattern on 8 1/2 X 11" / A4 LEF paper. Repeat as neces-
sary until the ADC Patch value(s) for the problem color(s) is within +/- 30 bits of the original
Humidity Adjusted ADC Targets.
Perform the following corrective action steps in order until the problem is resolved.
•
•
RAP.
1/05
3-24
manuals4you.com manuals4you.com
N
The BCO problem is resolved.
N
Make 50 full-color copies of the top half of the Color Test Pattern on 8 1/2 X 11" / A4 LEF
paper. Repeat as necessary until the ADC Patch value(s) for the problem color(s) is within
+/- 30 bits of the Humidity Adjusted ADC Targets. If the value(s) is not within this range
after making 250 copies, go to IQ 10 Low Image Density
N
The BCO problem is resolved.
Check the Toner dispense system for any blockage or obstruction that could limit the
amount of Toner reaching the Developer Housing.
Replace the developer material for the problem color
RAP.
(Machine Consumables)
Reissue
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