Star Micronics NX-1020 Technical Manual page 65

2
Printing operation
is normal?
YES
Paper feed
operation is
normal?
YES
Ribbon feed
operation is
normal?
YES
Terminates self printing.
Check host computer
connection.
Turn power off and check
I/F cable.
Turn power on.
Send print program from host
computer.
3
NO
Print head
drive signal waveform is
normal? *3
Replace printer mechanism.
NO
NO
1) Replace ink ribbon.
2) Replace printer mechanism.
A
– 61 –
*3 See (4) and (5) waveform in
item 10 of Chapter 7.
NO
YES
A
Paper feed
motor drive waveform is
normal? *2
YES
Replace printer mechanism.
A
C
TROUBLESHOOTING
1) Replace main logic board.
2) Replace printer mechanism.
*2 See (8) and (9) waveform in
item 10 of Chapter 7.
NO
1) Replace main logic board.
2) Replace printer mechanism.