Iq 14 Iot Solid Black (Or Color) Copy Rap; Iq 15 Background Rap - Xerox DocuColor 12/DCCS50 Service Manual

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).
• ROS Assembly (PL 4.1).
Reissue
DocuColor 12/DCCS50

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,
up procedure.
Procedure
Run IOT Test Pattern #9 from UI, or Test Pattern #102 from PWS in 4 color mode. Back-
ground is present.
Y N
Perform ADJ 9.1.2.
Perform ADJ 9.1.1 Max Setup. Max setup completed successfully.
Y N
Go to the RAP for the Fault Code indicated to troubleshoot the problem
Background is present.
Y N
Go to Final Actions.
Background is present in all four colors
Y N
Replace the developer material for the faulty color. If the problem continues, replace the
Developer Housing for the faulty color.
Perform ADJ 12.3.3 DADF Height. Background is still present.
Y N
Go to Final Actions.
Go to the IQ 37 Developer Bias HVPS
Y N
Replace the Developer HVPS
Enter Tools and return all density settings to nominal. If background is still present, replace the
Drum CRU, (Machine Consumables).
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IQ 14 IOT Solid Black (or Color) Copy RAP, IQ 15
3-19
Appendix 1. ATC set-
RAP. The Developer HVPS is good.
(PL 9.1).
Image Quality