Epson TM-U950 Technical Manual page 123

CONFIDENTIAL
Replace the printer mechanism assembly
4-10 Troubleshooting
Data from host is not printed normally for the TM-U950P
7
Does
interface
cable match
specification?
Yes
Is interface
cable broken?
No
Is interface
circuit board
connected to the main
circuit board
firmly?
Yes
Replace the I/F circuit board
OK?
No
OK?
No
Check the host
No
Replace with a proper cable.
Yes
No
Connect the board firmly
End
End
No
OK?
Yes
End
Replace the cable.
No
OK?
Yes
End
No
OK?
Yes
End
Rev. A