Sam4s NR-500R Service Manual page 70

8 Troubleshooting
8-4 Thermal Printer Problem
Printer Problem
Power VCC
VPRT Ok?
Disconnect
LF MOT
Feed OK?
P/END Sensor OK?
Thermister
Printing
End
8-4
N
N
Ok?
Y
N
Y
N
Y
N
OK?
Y
N
OK?
Y
1. Refer to the Power Problem.
2. Check the Harness.
1. Check the FFC Harness.
2. Check the PRINTER Disconnection Signal Pattern.
3. Check the PRINTER JOINT B'D and soldering status.
1. Check the Phase Signal (CPU P5.1, P5.4,P7.4,P8.3)
2. Check the Motor Enable Signal(CPU P5.5,P8.0)
3. Check the motor driver BD6380EFV(U12,U16)
4. Check the printer FFC harness & Replace the printer.
5. Check the PRINTER JOINT B'D and soldering status.
1. Check the Sen_p/end Signal (U30 P3,P7)
2. Check the Sensor light part circuit.
3. Check the printer FFC harness & Replace the printer.
4. Check the PRINTER JOINT B'D and soldering status.
1. Check the PRINTER JOINT B'D and soldering status.
2. Check the printer FFC harness.
3. Check the thermistor resistance of Printer.
1. Check the control signal on CPU.
(Clk / Data / Latch / Strobe#1/#2,#3,#4)
2. Check the VPH voltage. Source voltage is VPRT
3. Check the VPH ON/OFF circuit and pattern.
4. Check the FDS4141(U8), MMBT2222(Q24) on Main PBA
5. Check the JOINT B'D and FFC harness.
6. Check and Replace the printer.
SAM4S NR-500 SERIES