Iq 12 Missing Or Partial Image Rap - Xerox ColorQube 9303 Series Service Manual

IQ 12 Missing or Partial Image RAP

Use this RAP to troubleshoot wide deletions in the process direction that affect a complete
printhead or a when a single colour is missing from a single printhead.
The problem is usually caused by a communication or power error in the marking unit and
causes the substantial or complete loss of a single printhead,
or all colours. The problem may be an ink supply problem if only a part of the printhead is miss-
ing.
NOTE: Blank sheets accompanying multi-feeds or chase pages following a jam are normal.
Ensure IQ 1 Image Quality Entry RAP is performed before starting this RAP.
Figure 1 Printhead 2 failure
Image Quality
IQ 12
Initial Actions
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to
death or injury. Moving parts can cause injury.
Figure 1 and may be seen in one
Use care when moving the marking unit into the service position when hot. Ink can spill from
the ink reservoir located at the back of the unit if opened with too much force. Cross-colour ink
contamination could also occur.
The video cable (striped and labeled A,
labeled B,
to the printhead and IME controller PWB will occur if the cables are installed incorrectly.
Do not touch the exposed face of the printheads. Surface contamination or minor damage can
easily make the printhead unusable.
•
Procedure
Switch off, then switch on the machine,
faults are listed in the PEST history.
Y
A
February 2013
3-46
WARNING
GP 14. Disconnect the power cord. Electricity can cause
CAUTION
CAUTION
PL 92.10 Item
PL 92.10 Item 8) should not be interchanged at the printhead connectors. Damage
CAUTION
Check for media or debris around the printhead and drum. Clean as necessary, refer to
GP 27 Cleaning Procedure.
GP 14. Check the PEST fault history, dC123. New
N
Print the initial test pages, TP 1. Test pages are good.
Y N
NOTE: Before printing TP 26, ensure that A4 or 8.5 x 11 inch plain paper is loaded
long edge feed into tray 4. Use the best quality media available. Do not use hole
punched paper.
Perform dC968 Head Purge on the affected printhead. Print
mity / Colour Bands Test Page. Test prints are good.
Y N
Reseat the two ribbon cables,
the affected printhead. Print the initial test pages,
Y N
Switch off the machine,
affected printhead with the two ribbon cables on the working printhead on
the same carriage. Switch on the machine,
pages, TP 1. The defect moves to a new location.
Y N
Install a new quad wave amp PWB,
test pages, TP 1. The test pages are good.
Y N
Install a new IME controller PWB,
tial test pages,
Y N
Install a new printhead,
2.
B C D E F G
7) and the wave amp cable (white and
TP 26 Printhead Unifor-
PL 92.10 Item 7 and PL 92.10 Item 8, attached to
TP 1. The prints are good.
GP 14. Swap the two ribbon cables on the
GP 14. Print the initial test
PL 92.10 Item 3. Print the initial
PL 92.10 Item 1. Print the ini-
TP 1. The test pages are good.
PL 91.20 Item 2 or PL 91.25 Item
ColorQube® 9303 Family