Service manual

EPSON Stylus Photo R340/350 Revision A
Troubleshooting Troubleshooting 32
• Dot missing
Mixed colors
Blank Pages
Although ink is properly discharged
from the Print Head to the Cap, the
problem still occurs even after executing
a head cleaning or replacing ink
cartridges.
Print Head 1. Check if the printer recovers from the error by the head
cleaning or ink cartridges replacement.
1. Execute the head cleaning and ink cartridges
replacement the specified number of times. If
the problem still occurs, replace the Print
Head with a new one.
2. Check the Print Head for any damage. 2. Replace the Print Head with a new one.
Head Cleaner 1. Check the Head Cleaner for paper dust or deformation. 1. Replace the Ink System Unit with a new one.
Main Board 1. Check the Main Board for any damage. 1. Replace the Main Board Assy. with a new
one.
• Too much ink is
discharged
Ink is properly discharged from the Print
Head to the Cap, but nothing is printed
even after executing a head cleaning or
replacing ink cartridges. Or too much
ink is discharged.
Head Cable 1. Check if the Head Cable is correctly connected to the
connector on the Print Head and CN7/CN8 connectors on
the Main Board.
1. Correctly connect the Head Cable to the
connector on the Print Head and CN7/CN8
connectors on the Main Board.
Print Head 1. Check if the printer recovers from the error by the head
cleaning or ink cartridges replacement.
1. Execute the head cleaning and ink cartridges
replacement the specified number of times. If
the problem still occurs, replace the Print
Head with a new one.
Main Board 1. Check the Main Board for any damage. 1. Replace the Main Board Assy. with a new
one.
Table 1-14. Print Quality Problems (continued)
Problems Description Failed Part Check Point Remedies
CN7
CN8
Connector
Head Cable