Epson Stylus Pro 4910 Service Manual page 89

Epson Stylus Pro 4900/Epson Stylus Pro 4910
Symptom
Abnormal noise when the driven release is
in operation.
Abnormal noise other than the ones listed
above
Color inks consumed when printing in
black
A Maintenance Box is consumed faster
than the other
TROUBLE SHOOTING
Table 2-6. Abnormal Operations
Cause
Lack of lubrication on "SHAFT,
RELEASE, PAPER GUIDE, UPPER
UNIT"
Release scale is not encoded properly.
Abnormal noise other than the ones
listed above
Harnesses or FFCs are not secured
properly after reassembly.
This is not a trouble. Both cleaning and
black printing consume color ink.
This is not a trouble. Maintenance Box
2 is rarely consumed except for
borderless printing.
Abnormal Operations
Check Item
Does the driven release move smoothly?
Release scale damaged or dirty?
Release encoder attached properly?
Unfixed screws?
Springs and hooks fixed at proper positions?
Harnesses and FFCs secured properly by clamps or tape?
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Revision A
Remedy
If it does not move smoothly, lubricate "SHAFT,
RELEASE, PAPER GUIDE, UPPER UNIT".
P.421)
Replace the Release Motor Assy if the release
scale has trouble. (See P.197)
Attach the release encoder properly if there are
any attachment troubles. (See P.198)
If the trouble still remains, replace the release
encoder.
Fix the parts to the same place in same manner as
before disassembly.
Fix the parts to the same place in same manner as
before disassembly.
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Confidential
(See
90