Samsung YP-NDU User manual
DIGITAL AUDIO PLAYER
YP-NDU
SERVICE
1. Precautions
2. Specifications
3. Location of Controls
4. Troubleshooting
5. Exploded View and Parts List
6. Block Diagram
7. PCB Diagrams
8. Schematic Diagrams
Manual
DIGITAL AUDIO PLAYER CONTENTS
ELECTRONICS
© Samsung Electronics Co., Ltd. JUN. 2001
Printed in Korea
AH68-00759A
查询YP-NDUMP3供应商 捷多邦，专业PCB打样工厂，24小时加急出货
Samsung Electronics 1-1
1. Precautions
1. Some semiconductor (“solid state”)devices are easily damaged by static electricity.
Such components are called Electrostatically Sensitive Devices(ESDs); Examples included
integrated circuits and Some filed-effect transistors. The following techniques will reduce
the occurrence of component damage caused by static electricity.
2. Immediately before handling any semiconductor components or assemblies, drain the electrostatic change
from your body by touching a known earth ground.
Alternatively, wear a discharging wrist-strap device. (Be sure to remove it prior to applring
Power-this is an electric shock precaution.)
3. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum
foil to prevent accumulation of electrostatic charge.
4. Do not use freon-propelled chemicals. These can generage electrical charges that damage ESDs.
5. Use only a grounded-tip soldering iron when soldering ESDs.
6. Use only anti-static solder removal device. Many solder removal devices are not rated as
“anti-static”; these can accumulate sufficient electrical charge to damage ESDs.
7. Do not remove a replacement ESDs from its protective package until you are ready to install it.
Most replacement ESDs are packaged with leads that are electrically shorted together by conductive materials.
8. Immediately before removing the protective material from the leads of a replacement ESDs,
touch the protective material to the chassis or circuit or assembly into which the device will
be installed.
9. Minimize body motions when handling unpackaged replacement ESDs. Motions such as
brusing clothes togetherer or lifting a foot from a carpeted floor can generate enough static
electricity to damage an ESDs.
Precautions
1-2 Samsung Electronics
MEMO
Samsung Electronics 2-1
2. Specifications
YP-NDU
12MHz, 16bit CISC
Built-in Memory 32MB/64MB
3V
Two AAA-Size/8-hr or longer playing time (with alkaline batteries)
70x88x21mm(2.75”x3.46”x0.83”)/76g(2.68 Oz; without batteries)
Plastic /Aluminum
Up to 1.5Mbps
SmartMedia Card Socket
90dB(with A filter)
7mW
20Hz-20KHz
Model
Processor
Memory Capacity
Power
Battery
Dimensions (W x H x D)
Case
File Transmission Speed
Memory Socket
Noise Ratio
Earphone Output Power
Output Frequency Range
Specifications
2-2 Samsung Electronics
MEMO
Samsung Electronics 3-1
3. Location of Contols
3-1 Front Panel
3-2 Rear Panel
Stop/Power Off button
Volume control button
3D button
LCD
Voice Recorder button
Repeat button
Erase button
Mode/Section repeat
button
FF button
Equalizer button
REW button
Microphone
Connection cable
terminal
Power On
/Play
/Pause button
SmartMedia
Card Slot
Push open
button
Earphone jack
Eject
Hold switch
Battery case
Location of Controls
3-2 Samsung Electronics
3-3 Remote Controller
Volume control button
Power ON/Play/Pause
Stop/Power Off
button
Reverse
button
Forward
button EQ/REP button
Section repeat
button (A
Headphone/
Earphone port
B)
Hold
Switch
LCD
Panel
3-4 FM Remote Controller
Power ON/Play/Pause button
Hold switch
Belt Clip
Volume control button
FF button
Stop/Power OFF button
Mode button
EQ/REP button
LCD panel
REW button
Section repeat
button (A B)
Front Rear
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
Troubleshooting
Samsung Electronics 4-3
Check D3-1
>2.8V
Check
Y1(12MHz)
YES
NO
NO
NO
YES
YES
Check
Power On Check LCD
Check KEY S1
Replace
Main Board
Check
between con7 and
U1-96,97,98,99
No LCD Display
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