SAMSUNG YP-NDU64SF Troubleshooting

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

Troubleshooting

4-2 Samsung Electronics

Check

Vcc3, Vcc4, Vcc5

>2.8V

Check TP4>2.8V
if TP4<2.8V
Replace Main
Board

Check C66

Analog Signal

Cold Soldering Z1

or

Replace Z1

Check TP6

Analog Signal

Replace U15

NO

YES

NO

NO

NO NO

YES

YES

Check TP3, 3MHz

Check U16 -9

6MHz

YES

YES

YES

Replace

Sub Board

Replace

U16

Check

U14 -11,12,13

Digital Signal

Replace

Mainboard

U14

REC

No Recording