Repair By Unit Replacement - Star Micronics NX-1020 Technical Manual

3.

Repair by Unit Replacement

START
* Turn power off.
* Remove I/F cable.
* Mount ink ribbon.
* Set paper.
* Move carriage to center.
Turn power on.
Carriage
Moves?
YES
Carriage operates
normally?
YES
Carriage
once stops at home
position, and move the
center?
YES
1
NO
NO
Carriage motor
operating waveform is
normal? *1
Replace printer mechanism.
NO
Home position
switch signal is
normal?
Replace main logic board.
A
B
*1 See (6) and (7) waveform in
NO
YES
A
NO
YES
A
– 59 –
TROUBLESHOOTING
item 10 of Chapter 7.
1) Replace main logic
board.
2) Replace printer
mechanism.
1) Replace main logic
board.
2) Replace printer
mechanism.