Star Micronics LC-4511 Technical Manual page 64

TROUBLESHOOTING
3
Printing begins?
YES
Printing
operation normal?
YES
Stop print program.
END
B
Carriage moves
with hand?
YES
Output
(+33/40V, +5V)
of power supply unit is
normal? *4
NO
Turn power off.
Fuse blows out?
YES
Replace fuse.
Remove connector CN11
from main logic board
Turn power on.
4
NO
NO
NO
YES
NO
*4 Power Supply Unit
LC-4511 +33V Line +33V ± 5%
LC-4521 +40V Line +40V ± 5%
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 mecha-
nism.
3) Replace control panel
board.
Replace power supply unit.
Between Pin 4 and Pin 5 of CN1
+5V Line +5V ± 5%
Between Pin 1 and Pin 2 of CN1
– 60 –
A