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

9 Troubleshooting

This chapter describes the methods for troubleshooting in this Receipt Printer.
9-1 Power Problem
Samsung Electro-Mechanics
Power
Problem
Power Out
N
Ok? On SMPS
Y
Power VDR
N
(+24V) Ok?
Y
Power V
N
TPH
(+24V) Ok?
Y
Power VCC
N
(+5V) Ok?
Y
End
1. Check the Input/Output Power Cable
2. Replace the Adapter(SMPS).
1. Check the Fuse(FU1)
2. Check the Harness of Power S/W
3. Check the related Circuit & Pattern
1. Check the TR(Q3, Q4)
2. Check the On/Off Signal on CPU
1. Check the IC34063(U5)
2. Check the related Circuit & Pattern
3. Check the generated Frequency
9-1