Epson TM-U200 Series

Rev. A Troubleshooting 4-9
TM-U200 Series (Type A/AM) Technical Manual
Confidential
6
Replace printer
End
OK?
No
Replace interface PCB.
No
No
No
No
No
No
Yes
No
Yes
Yes
Yes
Yes
Set DIP switch 1–1 to OFF.
Send data from host to printer.
Is “?” printed?
Are serial
interface parameters
set to identical values at
host and printer?
Make settings identical.
Replace with a proper cable.
Is
Connect the interface
End
End
End
End
OK?
OK?
OK?
6 Data from host is not printed normally.
Yes
Does
interface
cable match
specifications?
Yes
connected to the
main PCB
firmly?
interface PCB
PCB firmly.
mechanism assembly
Yes
(*)
(*) Dotted line indicates
the process of checking
problems for the serial
interface.