Epson C117001-N - DFX 5000+ B/W Dot-matrix Printer Service Manual page 145

3. Carriage operation is normal, but the self-testis printed incomectly (continued).
Check the printhead
resistance.
Yes
Check the printhead drivers.
Yes
Replace the Cl 17 MAIN board.
L
I
+
Refer to Section 5.5, Repair of the
Printer Mechanism.
NOTE1: Check the followin connectors:
1. CN6 (Cl 17 MAI board)
2. Four connectors on the connector junction board in the
printer mechanism.
If the printhead drivers
are OK, replace the
Yes
Check
the
'Replace the printhead and Cl 17
the
Refer to Section 5.5, Repair of the
Printer Mechanism.
No If the printhead drivers
are OK, replace the
Rev. A