Defective Motor Operation - Star Micronics LC-4511 Technical Manual

4-3. Defective Motor Operation

START
LF-CMN
signal is normal?
*4
YES
LF-ø1,
ø2, ø3, ø4 are
normal? *5
YES
Replace
LF motor
Check operation
END
*4 See (10) and (11) waveform in item 7 of Chapter 7.
*5 See (12) and (13) waveform in item 7 of Chapter 7.
*6 See (8) and (9) waveform in item 7 of Chapter 7.
Paper Feed Motor
NO
Check and replace
1) TA7
2) TR19
3) Gate array
NO
Check and replace
1) TA7
2) CPU
START
CR-ø1,
ø2, ø3, ø4 are
normal? *6
YES
Replace
CR motor
Check operation
END
– 65 –
TROUBLESHOOTING
Carriage Motor
NO
Check and replace
1) TA 8
2) Gate array