Epson WF-C5790 Service Manual page 136
Color inkjet printer
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EPSON WF-C5790/WF-C5790a/WF-C5710/ET-8700/WF-C5210/WF-C5290/WF-C5290a
Troubleshooting
Step
Check whether printing or copying
1
Check whether the symptom occurs with printing or with copying.
Check the settings
Check that the print settings and paper type setting is correct.
2
Check the paper
3
Print with standard paper and check that there is no character distortion or blurring.
Check the ink
Check that genuine ink packs are attached.
4
Check the nozzle check pattern
Print nozzle check patterns and check whether there are nozzles missing or deflection.
Nozzle condition is excellent?
5
Check the PG
Check the PG with the thickness gauge and check that it is within the specified value range
6
(1.55 ±0.10 mm).
Is the PG within the standard value?
Troubleshooting
Check and measure
Troubleshooting procedure
Yes
Occurs with copying only
Occurs with printing and copying.
See
ADF/scanner trouble (P.
Go to the step 2
154).
Change the settings.
When the phenomenon is improved
Explain that the phenomenon is caused due to an
Go to step 3
erroneous print setting, and get the setting corrected.
When the phenomenon is not improved
Go to step 3
Recommend using the standard paper.
Go to step 4
Recommend using genuine ink packs.
Also, confirm recurrence by a genuine ink pack.
Note that it is necessary to fill ink due to ink replacement
Go to step 5
inside the ink path.
If the symptom continues to occur after changing to the
genuine ink packs, go to step 5.
Execute the head cleaning.
The standard cleaning strength depending on the number
of missing nozzles is as described below.
Go to step 6
*If nozzle missing is not improved, refer to
missing (P.
If the symptom continues to occur, go to step 6.
Perform the PG Adjustment
If the symptom continues to occur after performing the PG
Go to step 7
adjustment, go to step 7.
No
• CL1: No. of missing nozzles (1 to 5)
• CL2: No. of missing nozzles (6 to 20)
• CL3: No. of missing nozzles (21 or more)
Nozzles
133).
(p.
559).
Confidential
Revision A
136
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Troubleshooting
