Remedies For Print Quality Troubles - Epson SC-T7000 series Service Manual

SC-T7000 series/SC-T5000 series/SC-T3000 series

2.4 Remedies for Print Quality Troubles

This section provides troubleshooting of print quality troubles classifying them by observed symptom. Before performing troubleshooting, refer to
nozzle check pattern. Examine the printed pattern, and if any missing segment is found, perform the PRINT HEAD cleaning.
Symptom
The nozzles are still clogging after
cleaning.
TROUBLE SHOOTING
Table 2-3. Print Quality Troubles
Cause
The Wiper is contaminated and wiping
the PRINT HEAD cannot be performed
properly.
The Head Cap is contaminated.
There is some foreign material on the
PRINT HEAD.
There is something wrong in the pump
tube and the cleaning (suctioning of
ink) cannot be performed properly.
The ink is leaking.
There is air inside the ink path.
The HEAD FFC is not connected
correctly.
If any of the remedies above does not help, replace the following parts one by one.
PRINT HEAD (See P.126)
MAIN BOARD (The fuse may have blown)
Remedies for Print Quality Troubles
Check Item
1. Is the Wiper or Wiper Cleaner contaminated?
2. Is the Wiper or Wiper Cleaner damaged?
Is the Cap contaminated?
Is there any foreign materials on the PRINT HEAD?
Is the pump tube being bent or getting caught between
surrounding parts or components?
Is there any ink leakage observed on the ink flow paths?
Is there any air bubbles observed in the ink flow paths?
Is the HEAD FFC connected properly without being
connected at an angle and any abnormalities such as peeled
terminals?
(See P.111)
Revision B
"Nozzle Check" (p251)
Remedy
1. Clean the Wiper.
2. Replace the Wiper and Wiper Cleaner.
1. Clean the Cap.
2. Replace the Cap (PUMP CAP UNIT).
P.147)
Clean the PRINT HEAD.
Route the pump tube correctly.
If any leakage is found, correct it.
Run a head cleaning. (Page 252)
1. Reconnect the HEAD FFC.
2. If the trouble still occurs, the cause may be
breaking of the HEAD FFC. Replace the HEAD
FFC. (See P.127)
Confidential
and print
(See
58