Epson TM U200D Technical Reference - Page 86

Data from host is not printed normally

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5 Data from host is not printed normally. 5 Set DIP switch 1-1 to OFF. Send data from host to computer. (*) Yes Is "?" printed? No Does interface cable match specifications? Yes Is interface PCB connected to the main PCB firmly? Yes Are serial interface parameters set to identical values at host printer? No Make settings identical. Yes No OK? No Yes Replace with a proper cable. End No OK? Yes End No (*) Dotted line indicates the process of checking problems for the serial interface. Connect the interface PCB firmly. No OK? Yes Replace interface PCB. End Yes OK? No End Replace printer mechanism assembly End 4-8 Troubleshooting Rev.B

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4-8
Troubleshooting
Rev.B
5
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 computer.
Is “?” printed?
Are serial
interface parameters
set to identical values at
host printer?
Make settings identical.
Replace with a proper cable.
Is
Connect the interface
End
End
End
End
OK?
OK?
OK?
5
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.