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IQ 5 Jagged or Blurry Lines or Text RAP
Use this RAP to troubleshoot the following defects:
•
Jagged lines in the cross process direction
•
Jagged text in the cross process direction
•
Blurry text
•
Irregularly spaced text
Ensure
IQ 1
Image Quality Entry RAP is performed before starting this RAP.
Initial Actions
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to
GP
14. Disconnect the power cord. Electricity can cause
death or injury. Moving parts can cause injury.
Take care during this procedure. The stripper blade is very sharp and can cause injury.
Do not clean the stripper blade. The stripper blade is very sharp and can cause injury. If
the stripper blade is dirty a new blade must be installed.
Take care during this procedure. Sharp edges may be present that can cause injury.
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.
Do not touch the exposed face of the printheads. Surface contamination or minor damage can
easily make the printhead unusable.
•
Check that the printheads are securely attached to the carriage. Run
Drum Spacing. Perform
ADJ 91.1
Printhead Attachment Check.
•
Check that the printhead carriages are fully docked against the drum frame. If not, check
the wiring that runs along the umbilicals. Failure to properly route the upper or lower car-
riage wiring may lead to jagged or blurry lines or text.
Procedure
1.
Print
TP 1
Initial Test Print Pages and
the following defects:
•
Alignment errors,
Figure 1
and
one or more of the printhead stitch zones. If observed, go to the
Roll and Drum Runout
Checkout.
•
Misdirected or weak jets,
Figure
Checkout.
Image Quality
IQ 5
WARNING
WARNING
WARNING
WARNING
CAUTION
CAUTION
dC967
TP 16
Stitch Identification Test Pages. Check for
Figure
2. Dot placement errors spanning all colours in
Y-Stitch, Printhead
3. If observed, go to the
Weak Jets with Y-Dot Error
•
Weak intensity and poor Y-dot placement in all colours and all jets of a single print-
head,
Figure
the process direction. If observed, go to the
Colours Across a Printhead
•
Y-dot placement defects in the process direction with acceptable jet intensity,
5. A jagged edge in the process direction on lines and colour bands. If observed, go
to the
Y-Dot Error
•
Jagged text,
observed, go to the
2.
If the defect does not match any of the above, re-define the image quality defect. Refer to
IQ 1
Image Quality Entry RAP.
Y-Stitch, Printhead Roll and Drum Runout Checkout
Procedure
Evaluate
TP 16
Stitch Identification Test Page,
stitch defect varies in the process direction,
Y
N
Perform
dC971
Head to Head Alignment Adjustment up to three times. Print
Identification Test Pages. Refer to
defect is within specification.
Y
N
Perform
dC914
head alignment motion. The head alignment motion is free from obstructions.
Y
N
Remove obstructions and check printhead stitch and roll motor operation, refer
to:
•
91-504-00, 91-505-00
•
91-506-00 to 91-509-00
Check that the printheads are securely attached to the carriage. The
Printhead to
are securely attached.
Y
N
Perform
Perform
dC971
Test Pages.
if the severity of the alignment defect exceeds specification, refer to
Position. Perform the following:
•
Check for obstructions that block carriage and printhead motion.
•
Clean the IOD, refer to
•
Clean the drum, refer to
Perform
SCP 5
Final Actions.
NOTE: Before printing TP 23, 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
dC977
Drum Runout Calibration. Print
The test pages are good.
February 2013
3-24
4. A pale band across the whole width of a head with misplacement in
Weak Intensity and Y-Dot Error in All
.
Checkout.
Figure
6. Pixel position may be incorrect in the process direction. If
Blurry / Jagged Text Defect
Checkout.
Figure 1
and
Figure
Figure
2.
IQS 3
Y-Dot Position. The severity of the alignment
Head to Head Alignment Test and check for obstructions that block
Printhead Stitch Motor Over Current RAP.
Roll Motor Over Current RAP.
ADJ 91.1
Printhead Attachment Check.
Head to Head Alignment Adjustment. Print
GP 27
Cleaning Procedure.
GP 27
Cleaning Procedure.
TP 23
Drum Runout and Y-stitch Test Pages.
Figure
2. The severity of the
TP 16
Stitch
printheads
TP 16
Stitch Identification
IQS 3
Y-Dot
ColorQube® 9303 Family
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