Samsung SRP-350PG - SRP 350 B/W Direct Thermal Printer Service Manual page 85

9 Troubleshooting
9-4 Thermal Printer and Feed Motor Problem
9-4
Thermal Printer
Problem
N
Control Signal
Ok?
Y
Power Vcc N
V Ok?
TPH
Y
End
Feed Motor
Problem
N
Feed Motor
Ok?
Y
End
1. Check the Control Signal on CPU
(Data/CLK/Latch/Strobe1,Strobe2)
2. Check the Harness
3. Check the related Circuit & Pattern
1. Refer to the Power Problem
2. Check the HArness
1. Check the Signal(Step_A, Step_B) on CPU
2. Check the Current Control Signals(StepI0,
StepI1) on CPU
3. Check the Output Signal of U9, U11(TEA3718)
4. Check Auto Cutter Assembly(Motor, Cutter...)
5. Check the Harness
6. Check the Step Motor and the related Circuit &
Pattern
Samsung Electro-Mechanics