Sam4s ER-430 SERIES Service Manual page 54

8 Troubleshooting
8-4 Thermal Printer Problem
Thermal Printer
Problem
Power Vcc
V Ok?
PH
Line Feed
OK?
Sensor
OK?
Thermistor
OK?
Print
Ok?
End
8-4
N
Y
N
Y
N
Y
N
Y
1. Refer to the Power Problem.
2. Check the Harness.
1. Check the Phase Signal (CPU P10.5,P10.6, P7.6,P7.7)
2. Check the Driver TEA3718S (U7,U8,U12,U13)
Enable Signal.
3. Check the related Circuit and Pattern(IC LB1838).
4. Check the Harness.
5. Check the Feed Step Motor .
1. Check the related Circuit and Pattern of 74HC14 (U9).
2. Check the Harness.
3. Check the Sensor of Print Connection PBA.
1. Check the ADC Port P10.0 of CPU.
2. Check the related Circuit and Pattern.
3. Check the Harness.
4. Check the Thermistor of TPH.
1. Check the Control Signal on CPU
2. Check the Harness.
3. Check the related Circuit and Pattern.
SAM4S ER-430 SERIES