Service manual

8 Trouble Shooting
SAM4S ER-650 SERIES 8-5
8-5 Thermal Printer Problem
End
Thermal Printer
Problem
Control Signal
Ok?
Y
N
1. Check the Control Signal on CPU
(Data/CLK/Latch/Strobe1,Strobe4)
2. Check the Harness.
3. Check the related Circuit and Pattern.
Power Vcc
V
H Ok?
Y
1. Refer to the Power Problem.
2. Check the Harness.
N
Sensor
OK?
1. Check the related Circuit and Pattern(IC LM393).
2. Check the Harness.
3. Check the Sensor PBA.
Y
Feed Motor
OK?
N
1. Check the related Circuit and Pattern(IC LB1838).
2. Check the Harness.
3. Check the Feed Step Motor .
Printer Work
OK?
1. Replace the Thermal Printer .
Y
Y
N
N