Samsung YP-NEU64B, Service Manual

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Samsung Electronics 4-1
4. Troubleshooting
Symptoms Possible Causes Check Point Action
No LCD
No Recording
Faulty recognition
of memory
Faulty switch
operation
Faulty down load
Faulty switch
operation
Faulty remote
control button
No Power
Replace Main &
Sub board
Replace LCD
Replace Z1
Check Vcc5
Check TP4 (High)
Replace (U14)
Replace Main & Sub
Soldering
Replace Flash Memory
Soldering
Replace Switch
Replace main board
Soldering
Soldering
Replace Switch
Replace remote control
Faulty LCD
Faulty Z1, U15, U14
- Open or Short PCB
- Faulty Flash Memory
- L3(3V)
- U1 Pin 3,13,35,80(3V)
- J1 PIn 1 (3V)
- U1 Pin 98 (Signal)
- C66 (Signal)
- U15 PIn 5(3V)
- U14 Pin 11,12,13 & TP3(Signal)
- Ports between U2 and memory
chip (smart media card socket)
- Mechanical parts
- Check TP1, TP2
- Open/Short test of switch
- Mechanical parts
- Check between U1 and U17
- Cold soldering on J6
- U14 Pin 6,16(3V)
- Cold soldering on switch
- Open PCB pattern
- Open or Short on switch
- Open PCB pattern - Open / Short test of switch
- Mechanical parts
- U1 Pin 17
- Faulty Remote control
- Cold soldering
- Open or Short on switch
- Faulty J6