Iq 30 Fuser Offsetting Rap - Xerox DocuColor 12/DCCS50 Service Manual

IQ 30 Fuser Offsetting RAP

Toner that was not cleaned off the Heat Roll offsets onto the front or back side of copies.
NOTE: Offsetting is most likely to occur when running long jobs of high area coverage, trans-
parencies or coated papers. High AC transparencies should be run using paper interleaves.
Offsetting is also likely to occur when running heavy paper in the normal paper mode. Offset-
ting is more likely to occur as the Heat Roll ages.
Initial Actions
• Perform the Fuser Nip (dC701) ADJ
that the Heat and Pressure Roll Bearings are correctly positioned. Also check that the
Pressure Roll Lift mechanism is functioning properly. Ensure that the 2 screws holding the
upper and lower Fuser Frames together are tight.
• In some cases, highly contaminated fuser oil can lead to offsetting, especially with trans-
parencies and black copies. This situation is possible under the following circumstances:
– The machine has a low oil supply (i.e., oil bottle is empty oil tank is low/add oil mes-
sage is displayed).
– Oil level on the copies is low (indicated by the lack of oil streaks).
– The machine has high copy volume (more than 100K) and the oil in the tank is milky/
dirty.
– Low Humidity environments may increase the likelihood of offsetting.
If this is suspect, replace the Oil Tank and Oil Pipe
(PL 8.7), then go to the GP 1 Fuser Break-In
• Excessively high Fuser temperature is a primary cause of Fuser contamination. This
problem is prevalent when the machine is run in Extra Heavyweight mode, and increases
when high area coverage images are run frequently. If this is suspect, change the default
values for the NVM locations in Table 1
Procedure
Remove the Fuser Assembly. Check the following components. Clean excess toner from the
components using the Cleaning Procedures
nation remains or if offsetting continues after cleaning.
• Heat Roll (PL 8.3)
• Pressure Roll (PL 8.3)
• External Heat Roll (PL 8.8)
• Donor Roll (PL 8.9)
• Pick Up Roll (PL 8.9). If Roll is replaced, also replace the Metering Blade
• Oil Wick (PL 8.7)
• Cleaning Roll (PL 8.5)
Perform the actions indicated below:
• Check the Oil Bottle, if empty, replace
• Check the Oil supply system is functioning. Go to the
• Check that the load springs and bearings for the Donor Roll Assembly are properly posi-
tioned.
• Advance the web manually to a clean area. Access NVM location 777-079 and increase
the value by 7,000 for each 25mm/one inch that the web was advanced.
Reissue
DocuColor 12/DCCS50
8.1.1. If the nip width is very low at one end, check
(PL 8.7) and the Oil Wick and Oil Filter
Procedure.
to the values listed in the New values column.
in Section 1. Replace the components if contami-
(PL
(Machine Consumables).
OF10-2 Fuser Oil Pump
• Run the Fuser Break-in Procedure
• Check for indications that the Web Supply Roll is rotating normally. If there is a buildup of
toner across the entire length of the web, perform the Web Motor Checkout.
Web Motor Checkout
+24 VDC is measured between P/J413A-2 on the IOT Drive PWB and GND.
Y N
+24 VDC is measured between P/J440-1 on the Web Drive PWB and GND.
Y N
Go to Flag 1 on BSD 10.5 and check the harness for an open circuit. If the harness is
OK, replace the Distribution PWB
+24 VDC is measured between P/J440-2 on the Web Drive PWB and GND.
Y N
Check the Web Motor
PWB (PL 8.4).
Go to Flag 2 on BSD 10.5 and check the harness for an open circuit.
Enter DC330 [10-032] Web Motor. Press the Start button. The
decreases from +24 VDC to less than +1.0 VDC.
Y N
Replace the IOT Drive PWB
tridge.
Replace the Web Drive PWB
Motor (PL 8.4).
NVM loc. Default value New value
777-001 160
777-003 178
777-005 150
777-010 165
777-013 158
777-016 180
777-017 193
777-018 165
8.9).
777-019 187
777-020 193 (NASG)
185 (ESG)
777-021 162
777-023 163
RAP.
777-026 161
777-027 164
777-028 162
777-098 163
777-135 193
1/05
3-31
GP 1 Fuser Break-In Procedure.
(PL 9.3).
(PL 8.4) for an open circuit. If it is OK, replace the Web Drive
voltage
(PL 9.2). Install the Web CRU, Front Cover and Oil Car-
(PL 8.4). If that does not correct the problem, replace the Web
Table 1 Fuser temperature NVM values
NVM loc. Default value New value
155 777-137
170 777-138
145 777-139
161 777-166
153 777-194
170 777-195
183 777-196
156 777-256
167 777-257
172 777-272
156 777-276
151 777-280
155 777-299
155 777-300
150 777-301
155 777-309
188 777-310
IQ 30 Fuser Offsetting RAP
at P/J413A-2
190 183
183 180
195 188
164 156
185 165
182 165
190 170
1050 18000
1050 25000
165 161
160 155
156 151
193 175
10 2
168 161
168 161
169 163
Image Quality