Sam4s ER-650 Service Manual page 61

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