Star Micronics NX-1020 - Defective Interface Operation

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TROUBLESHOOTING
Check I/F cable.
Check and replace
1) IC2
2) Gate array
3) CPU
NO
YES
4-5. Defective Interface Operation
START
Press on line switch to
take on line.
Send print program
from host computer.
Is I/F
signal normal? *9
YES
Incorrect print
generated?
NO
Check operation
END
*9 See (10) waveform in
item 10 of Chapter 7.