Defective Print Head Operation - Star Micronics LC-1011C Technical Manual

TROUBLESHOOTING

4-4. Defective Print Head Operation

START
Does not
print at all?
YES
25~45V
line is
supplied?
YES
Head
energizing control
signal is normal?
*7
YES
Check and replace
1) Print head
END
NO
NO
Power supply
unit abnormal.
(Refer to item 4-2.)
NO
Check and replace
1) Gate array
2) CPU
*7 See (4) waveform in item 9 of Chapter 7.
A specific
pin does not
work?
NO
Print is light
as whole?
NO
– 58 –
YES
Check and replace
1) TR4
2) TA2, TA3
YES
Adjust gap
(Refer to Chapter 3.)