Star Micronics NX-1020 Technical Manual page 64

TROUBLESHOOTING
1
On line lamps light?
YES
Press on line switch to take
off line.
On line lamp is out?
YES
Press paper feed switch.
Paper feed switch
operation is normal?
YES
Turn power off.
Holding paper feed switch,
turn power on.
Carriage operates
normally?
YES
2
NO
On line lamp
signal is normal?
Replace control panel board.
NO
E
NO
Paper feed
motor drive waveform
is normal? *2
Replace printer mechanism.
Self
printing:
NO
Carriage motor
drive waveform is
normal? *1
Replace printer mechanism.
NO
YES
A
*2 See (8) and (9) waveform in
item 10 of Chapter 7.
NO
YES
A
*1 See (6) and (7) waveform in
item 10 of Chapter 7.
NO
YES
A
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Replace main logic board.
1) Replace main logic board.
2) Replace printer mechanism.
1) Replace main logic board.
2) Replace printer mechanism.