Xerox DocuColor 12/DCCS50

1/05
3-19
DocuColor 12/DCCS50
IQ 14 IOT Solid Black (or Color) Copy RAP, IQ 15
Image Quality
Reissue
IQ 14 IOT Solid Black (or Color) Copy RAP
IOT Solid Black Copy RAP. This RAP is used when the copy is solid black with no original doc-
ument image seen in the copy.
Initial Actions
Because the ROS exposes the areas of drum that will receive toner, or writes the four colors,
this failure can be caused by the following in order of probability:
• Failure to charge the drum. Caused by faulty Charge Corotron, IOT PWB, or PTC and CC
HVPS
.
• Failure of the Developer Bias power Supply.
• Overexposure of the Drum. Caused by faulty IOT PWB, or ROS Assembly.
Both of these failures will cause the output copy to be completely black, with no image vis-
ible from the original document.
• Mispositioned mirror or lens
Procedure
Go to the IQ 37 Developer Bias HVPS RAP. If the Developer Power Supply is good, go to the
IQ 38 Charge Corotron HVPS RAP. If the Charge Corotron Power Supply is good, replace the
Drum CRU (Machine Consumables). If the problem remains, this indicates there is a problem
in the ROS circuits. Replace the following components in the order shown. After each replace-
ment, make a copy to check the operation of the copier:
•IOT Drive PWB (PL 9.2).
• R
OS Assembly (PL 4.
1).
IQ 15 Background RAP
IOT RAP. This RAP is used when the output image shows background greater than the specifi-
cation.
NOTE: After replacing developer material, go to IQ47 ATC Sensor RAP, Appendix 1. AT
C set-
up procedure.
Procedure
Run IOT Test Pattern #9 from UI, or Test Pattern #102 from PWS in 4 color mode. Back-
ground is present.
YN
Perform A
DJ 9.1.2.
Pe
rform ADJ 9.1.1 M
ax Setup. Max setup completed successfully.
YN
Go to the RAP for the Fault Code indicated to troubleshoot the problem
Background is present.
YN
Go to F
inal Actions.
Background is present
in all four colors
YN
Replace the developer material for the faulty c
olor
. If the problem continues, replace the
Developer Housing for the faulty color.
Perform ADJ 1
2.3.3 DADF Height. Background is still present.
YN
Go to F
inal Actions.
Go to
the IQ 37 Developer Bias HVPS RAP. The D
eveloper HVPS is good.
YN
Replace the Developer HVPS (PL
9.
1).
Enter Tools and return all density settings to nominal. If background is still present, replace the
Drum CRU,
(Machine Consumables).