Panel Pba And Sensor Problem - Samsung SRP-350PG - SRP 350 B/W Direct Thermal Printer Service Manual

9-3 Panel PBA and Sensor Problem

Samsung Electro-Mechanics
Panel PBA
Problem
N
LED Ok?
Y
N
Feed S/W
Ok?
Y
Cover Open
N
Sensor Ok?
Y
End
Sensor
Problem
N
Paper End
Ok?
Y
N
Near End
Ok?
Y
End
1. Check the LED Signal from CPU on Main PBA
2. Check the Harness(Signal, VCC, GND)
3. Check the related Circuit, Pattern & Component
4. Replace the Panel PBA
1. Check the Feed S/W Signal on Main PBA
2. Check the HArness
3. Check the related Circuit, Pattern & Component
1. Check the Cover Sensor Signal on Main PBA
2. Check the Harness
3. Check the related Circuit, Pattern & Component
1. Check the Paper End Sensor Signal on Main PBA
2. Check the TR(Q7) and the reated Pattern
3. Check the Harness
4. Check and Replace the P_End Sensor
1. Check the Near-End S/W Signal on Main PBA
2. Check the Harness
3. Check and Replace the Micro S/W
9 Troubleshooting
9-3