Iq 9 Uneven Density Rap - Xerox DocuColor 12/DCCS50 Service Manual

A
Y N
The problem is in the Fuser. Disassembly the fuser and carefully inspect the follow-
ing parts for damage or toner buildup.
• Pressure Roll (PL 8.3)
• Heat Rolls (PL 8.3)
• Web CRU (Machine Consumables)
Go to the IQ 40 2nd BTR HVPS RAP. If the 2nd BTR Power Supply is good, inspect/
replace the 2nd BTR (PL 9.2).
The problem is in the Xerographic Module, the 1st BTR, or the IBT Belt. Complete the steps
below until the problem is resolved
• Check the IQ 41 1st BTR HVPS RAP
• Replace the IBT Belt (PL 7.5)
• Clean/replace the IBT Cleaning Blade
• Replace the Drum CRU (Machine Consumables)
Image Quality
IQ 8 Residual Image RAP, IQ 9 Uneven Density RAP
(PL 7.8)

IQ 9 Uneven Density RAP

Uneven Density RAP. This RAP is used when the IOT output image shows uneven density in
the inboard to outboard direction.
Initial Actions
• Ensure that all HFSI items that are near or over threshold have been replaced.
• Ensure that IBT is positioned correctly in relation to the Copy/Print Cartridge (Xero Drum).
• Check the Plate (PL 7.6) that supports the outboard end of the IBT Backup Roll for dam-
age.
Procedure
Place the Color Test Pattern on the platen and make a print in Black, Yellow, Magenta and
Cyan. The defect is present in all four colors.
Y N
Replace the developer material for the problem color.
NOTE: After replacing developer material, go to IQ47 ATC Sensor RAP,
set-up procedure.
If the problem is still present, replace the Developer Housing for the problem color
6.6).
Max Setup. The Setup runs successfully.
Run ADJ 9.1.1
Y N
Go to the RAP for the Fault Code indicated to troubleshoot the problem.
Xerographic Hard Stop Procedure
1. Remove the Paper Handling Module Cover.
2. Make sure that the IBT Handle is up.
3. Cheat the Front Door Interlock.
4. Use the Test Pattern that displays the fault.
5. Press Start.
6. Watch the Registration Drive Gear
7. When the gear starts to rotate, remove the interlock cheater.
8. Extend the Paper Handling Drawer.
9. Remove the two screws that secure the IBT Front Frame and turn IBT handle down.
10. Extend the IBT Drawer to the service position.
Observe the Image on the IBT. The defect is present on the IBT.
Y N
Go to the IQ 40 2nd BTR HVPS
2nd BTR (PL 7.9). If the problem continues, replace the IBT Belt
The problem is in the Xerographic Module, the 1st BTR, or the ROS. Complete the steps below
until the problem is resolved
• Check the photoreceptor, the corotron wire, and the corotron grid for defects or damage. If
any component is questionable, replace the Drum CRU
• Go to the IQ 41 1st BTR HVPS
BTR (PL 7.6).
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Appendix 1. ATC
(Figure 1).
RAP. If the 2nd BTR Power Supply is good, replace the
(PL 7.5).
Machine Consumables.
RAP. If the 1st BTR Power Supply is good, replace the 1st
DocuColor 12/DCCS50
(PL
Reissue