Defective Print Head Operation - Star Micronics LC-8211 Technical Manual

GENERAL SPECIFICATIONS

4-4. Defective Print Head Operation

START
Does not
print at all?
YES
+33V line
is supplied?
YES
Check and replace
1) TR12 ~ TR16
2) Gate array
Head
energizing control
signal is normal?
*7
YES
Check and replace
1) Print head
END
NO
NO
Check and replace
1) Power supply unit
(Refer to item 4-2.)
NO
Check and replace
1) Gate array
2) CPU
*7 See (4) waveform in item 7 of Chapter 7.
A specific
pin does not
work?
NO
Print is light
as whole?
NO
– 66 –
YES
Check and replace
TA1 (HD1, 2, 3, 4)
TA2 (HD5, 6, 7, 8)
TA3 (HD9, 10, 11, 12)
TA4 (HD13, 14, 15, 16)
TA5 (HD17, 18, 19, 20)
TA6 (HD21, 22, 23, 24)
YES
Adjust gap
(Refer to Chapter 3.)