Epson C117001-N - DFX 5000+ B/W Dot-matrix Printer Service Manual page 144

Troubleshooting
Carriage operation is normal, but the self-testis printed incorrectly.
3.
START
Perform the self-test.
Are the connectors
inserted securely?
No
Check printhead cable
continuity. Visually check
any bad part.
Y e s
fault corrected?
I
E N D
the followin connectors:
NOTE 1: Check
1. CN6 (Cl 17 MAI board)
2. Four connectors on the connector junction board in the
printer mechanism.
Rev. A s-7