Epson Stylus Pro 4910 Service Manual page 92

Epson Stylus Pro 4900/Epson Stylus Pro 4910
Symptom
Odd color measurement result
Manual color measurement failure
Paper Out error occurs after paper feeding
operation, when carrying out manual color
measurement
If none of the remedies above helps
TROUBLE SHOOTING
Table 2-7. Problems on SpectroProofer
Cause
Color calibration not done properly
Paper length is out the range of the
guaranteed color measurement
Ripples/warp in the paper
Double feed of plain paper
Paper pressing plate impressing the
paper too much
Paper skewed
Paper too thick
Paper not set properly
Problem on SpectroProofer
Problems on SpectroProofer
Check Item
Check the following:
Is the Backing attached to the proper position?
Is the white calibration tile set?
Is the white calibration tile not dirty?
Is the SpectroProofer calibrated?
Did the SpectroProofer lamp burn out?
Carry out "Sensor Check" of the service program to check
if the CR HP Sensor is working properly
Check if the paper length is within A2 Portrait (594.0mm).
Are the paper settings and the printing settings proper?
Are the paper not rippled or warped?
Is the ink density proper (not too dense)?
Is the paper setting proper?
Were the paper fanned before set to the paper cassette?
Is the ink density proper (not too dense)?
Is the ink drying time proper (long enough to dry up)?
Do the paper settings match the paper set?
Check if the paper is not skewed.
Check if the paper is not too thick.
Is the set paper skewed?
Is the paper position set too far to the FULL side?
Is the paper position set too far to the HOME side?
Are the paper smudged at the PE Sensor's detection
point?
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Remedy
Attach the Backing and the white calibration
tile properly.
Clean the white calibration tile
If the remedies above do not help, replace the
SpectroProofer and the white calibration tile.
Re-attach the sensor if it is not set properly.
(See P.401).
Replace the sensor if it is not working properly.
Use paper of the length within A2 Portrait
(594.0mm)
Make the paper/printing/ink density settings
according to the media used.
Replace distorted paper.
If the remedies above do not help, adjust the
printer (Refer toTrouble on Paper Feeding
(P.83)).
Make the paper settings according to the media
used.
Fan the paper well, and re-set them to the paper
cassette.
Adjust ink density if it is too dense.
Adjust ink drying time if it is too short.
Match the paper settings to the paper set.
Set the paper properly.
Change the paper, since color measurement is only
available for feedable paper.
Set the paper properly.
Reprint the paper for color measurement.
Replace the SpectroProofer and the white
calibration tile.
Revision A
(See P.418).
93
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