Star Micronics NX-1020 Technical Manual page 66

TROUBLESHOOTING
3
Printing begins?
YES
Printing
operation normal?
YES
Stop print program.
END
B
Carriage moves
with hand?
YES
Output
(+25V, +5V)
of power supply unit is
normal? *4
NO
Turn power off.
Fuse blows out?
YES
Replace fuse.
Remove connector CN5 from
main logic board.
Turn power on.
4
NO
NO
NO
YES
NO
D
1) Replace I/F cable.
2) Replace main logic board.
3) Check host computer.
C
Replace printer mechanism.
1) Replace main logic board.
2) Replace printer
mechanism.
3) Replace control panel
board.
Replace power supply unit.
*4
+25V ± 5%
+25V Line
+5V ± 2.5%
+5V Line
– 62 –
Between Pin 1 and Pin 2 of CN1
Between Pin 4 and Pin 3 of CN1
A