Xerox 8830 Service Manual page 249

GP4 Drum Cleaning Enhancement
1. Remove the Drum Assembly (REP 9.2).
2. Use the dusting pouch (8R181) to apply a
thin layer of Zinc Stearate over the entire
surface of the drum.
3. With a new lint-free cloth (600S4372),
wipe the entire surface of the drum, using
moderately heavy pressure. Use a back
and forth motion of 6 - 10 strokes while
revolving the drum three revolutions.
4. Repeat steps 2 and 3 one time and then
continue with step 5.
5. Apply a thin layer of Zinc Stearate over the
entire surface of the drum.
Reinstall the drum assembly.
Rotate the Drum manually to clean off excess
zinc stearate.
8830
GP5 Communication Loopback
Test
NOTE: In order to perform this test, it is
necessary to use the Loopback
(600K43210).
For printers with a Controller:
1. Remove the Controller and disconnect the
ribbon cable (J307B) from the IOT Main
PWB.
2. Connect the 152K59420 loopback cable to
J307B on the IOT Main PWB.
3. Connect the loopback tool 114E4680 to
the loopback cable.
4. Enter [1402] to run the communication
test.
5. If the test passes a 0 will be displayed and
the problem is in the ribbon cable or the
Controller.
6. If the test fails (1), replace the IOT Main
PWB (PL 1.1).
For printers without a Controller:
1. Connect the loopback tool to the lower
connector located on the rear right side of
the IOT.
2. Enter [1402].
3. if the test passes (0), the problem is the
XPC or the connection between the XPC
and the printer.
4. If the test fails (1), remove the right rear
lower cover and disconnect the cable at
J308 on the Main PWB.
5. Connect the loopback cable (152K59420)
into J308 and connect the loopback tool
(114E04680) to the loopback cable and
repeat the test.
6. If the test passes, replace the cable.
7. If the test fails, replace the IOT Main PWB
(PL 1.1).
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Kit
GP4, GP5