Defective Interface Operation - Star Micronics NX-1020 Technical Manual

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.
NO
YES
– 69 –
TROUBLESHOOTING
Check I/F cable.
Check and replace
1) IC2
2) Gate array
3) CPU