Samsung YP-U4 User manual

SERVICE
Manual
YEPP
Model Name: YP-U4
Model Code : YP-U4JAB/EDC
YEPP
Refer to the service manual in the GSPN (see the rear cover) for the more information.
CONTENTS
1. Precaution
2. Product Specification
3. Disassembly & Reassembly
4. Troubleshooting
5. Exploded View & Part List
6. PCB Diagram
7. Schematic Diagram
YP-U4

This Service Manual is a property of Samsung Electronics
Co.,Ltd. Any unauthorized use of Manual can be punished
under applicable International and/or domestic law.
GSPN (Global Service Partner Network)
Area Web Site
North America service.samsungportal.com
Latin America latin.samsungportal.com
CIS cis.samsungportal.com
Europe europe.samsungportal.com
China china.samsungportal.com
Asia asia.samsungportal.com
Mideast & Africa mea.samsungportal.com
© Samsung Electronics Co.,Ltd. Aug. 2008
Printed in Korea

Contents
1. Precaution
1-1 Safety Precautions...........................................................................................1-1
1-2 Static Electricity Precautions............................................................................1-2
2. Product Specification
2-1 Product Feature ...............................................................................................2-1
2-2 Specifications...................................................................................................2-2
2-3 Specifications Analysis.....................................................................................2-3
2-4 Accessories......................................................................................................2-4
3. Disassembly & Reassembly
3-1 Overall Disassembly & Reassembly................................................................3-1
4. Troubleshooting
4-1 Checkpoints by Error Mode..............................................................................4-2
4-2 Upgrade Methods.............................................................................................4-10
5. Exploded View & Part List
5-1 Exploded View .................................................................................................5-2
5-2 Electrical Part List ............................................................................................5-4
6. PCB Diagram
6-1 MAIN PCB Top.................................................................................................6-2
6-2 MAIN PCB Bottom ...........................................................................................6-4
7. Schematic Diagram
7-1 Overall Block Diagram .....................................................................................7-2
7-2 MAIN................................................................................................................7-3

Samsung Electronics 1-1
Precaution
1. Precaution
1-1 Safety Precautions
1. To remove dust from cabinet, use a dry cloth without using liquid and aerosol cleaner.
2. You should not use attachments not recommended by the company. Otherwise, it may cause critical damage.
3. You should not use this product near water such as bathtub, swimming pool or lake etc.
4. Power supply: A type of battery as displayed on the label should be only used.
5. You should not put any object or liquid into product. Otherwise, it may cause failure or mal-operation.
6. If replacement material is required, service engineer should use materials with the same standard.
The use of non-standardized materials may cause failure of product.

1-2 Samsung Electronics
Precaution
1-2 Static Electricity Precautions
Some semi-conductor parts may be easily damaged due to static electricity.
These elements are generally called as static electricity sense device (ESD). Typically examples of EST include
IC, some transistor and chip element for semi-conductor with electrical field effect.
The following methods should be used to reduce damage of elements occurred due to static electricity:
1. Contact and emit all the grounding objects with static electricity from your body before handling with elements
for semi-conductor or devices with elements for semi-conductor. You should purchase and use static electricity
arm rings or commercially available. You should remove it due to potential shock before supplying power to the
device under test.
2. You should place appliance on the conductive surface like aluminum film to prevent that static electricity is
accumulated or the device is disclosed outside after removing electrical appliance with the ESD device.
3. You should use only soldering iron that is ground when soldering the ESD device.
4. Minimize physical operation when handling with the ESD device for replacement without packing (Otherwise,
namely friction between cloth fibers or lifting of the foot from the carpet floor may cause static electricity enough
to damage the ESD device).

Samsung Electronics 2-1
Product Specification
2. Product Specification
2-1 Product Feature
Convergence
- UMS/MTP Dual Support
Feature
- Supports Music Subscription SVC
- FM Radio & FM Recording
- Voice Recording
- Playback Speed Adjustment
- Interval Skip Playback
- (A-B) Section Repeat
- Data Cast
Usability
- Recently added playlist
- User Button
- DNSe 2.0
Semiautomatic Sliding USB
Light Effect Using White-LED
4Line 16-Gray OLED Display (128 x 64)
Sleek Touch Pad

2-2 Samsung Electronics
Product Specification
2-2 Specifications
Basic Specification
Rating DC 3.7V / 500mA
Built-in Battery Power 300 mAh / DC 3.7V
File Compatibility MPEG1/2/2.5 Layer3 (8kbps ~ 320kbps, 8kHz ~ 48kHz)
WMA (48kbps ~ 192kbps, 8kHz ~ 48kHz)
Supported Number of Files Folder: Max. 1000 / File: Max. 3000
Earphone Output 20mW/Ch. (based on 16Ω)
Output Frequency Range 40Hz ~ 20kHz
Signal to Noise Ratio 90 dB with 20 kHz LPF (based on 1kHz 0 dB)
Play Time Maximum of 16 hours for music playback
(based on: MP3 128kbps, Volume: 15, Normal Mode, Display Off)
Temperature Range for
Operation -5 ~ 35°C (23~95°F)
Case Plastics
Weight 0.97 oz
Dimensions (W x H x D) 1.06˝ x 3.27˝ x 0.51˝
FM Radio
FM Frequency 87.5 ~ 108.0MHz
FM Signal to
Noise Ratio 55 dB
FM T.H.D 1%
FM Useable
Sensitivity 38dBu

Samsung Electronics 2-3
Product Specification
2-3 Specifications Analysis
Model Name YP-U4 YP-U3
Photo
Color Black/Red/Blue Black/White/Pink/Green/Blue
PC Interface USB 2.0 USB 2.0
Power Battery time: Li-poly 16 Hours Battery time: Li-poly 15 Hours
LCD 16Gray 4Line OLED (128x64) Mono 4Line OLED (128x64)
Key Tact Key: Play (Power)/Rec (User)
Touch: FF/REW/Select/Vol+/Vol-/Back Tact Key: Play (Power)/Rec (User) Touch: FF/REW/Menu/Vol+/Vol-
External Material IN-Mold Surface Deposition, IN-Mold
Accessory EP-370/Quick Guide/Install CD EP-360/Quick Guide/Install CD
PC Software Samsung Media Studio Samsung Media Studio
Minimum System
Requirements Windows 2000/XP/Vista Pentium 500MHz Windows SE/ME/2000/XP Pentium 133MHz

2-4 Samsung Electronics
Product Specification
2-4 Accessories
2-4-1 Supplied Accessories
Accessories Item Item code Remark
Earphones AH59-01884A
Samsung Service Center
Program Installation CD AH46-00058C

Samsung Electronics 3-1
Disassembly & Reassembly
3. Disassembly & Reassembly
3-1 Overall Disassembly & Reassembly
- Be careful to follow the disassembly sequence described in the manual. Otherwise, the product
may be damaged.
- Be sure to carefully read and understand the safety instructions before performing any work as
the IC chips on the PCB are vulnerable to static electricity.
- Assemble in the reverse order of disassembly.
No. Part Name Description Description Photo
1 ASSY-
WINDOW
LCD
1) With the USB hinge out, put the
disassembling tool into the hole in the
back of the serial label.
When separating them, be careful
not to make scratches.
2) Press on the disassembling tool
and lift the ASSY-WINDOW LCD.
3) Lift the Connector Locker and then
remove the ASSY-WINDOW LCD.

3-2 Samsung Electronics
Disassembly & Reassembly
No. Part Name Description Description Photo
2 FRAME 1) Remove the 2 screws.
: CH,+,B,M1.4,L4,NI PLT,
2) Lift and remove the FRAME by the
part where the pin set appears.
3 MAIN PCB 1) Remove the USB FPCB, then hold
the ASSY CABINET-BACK by the top
and bottom and lift and remove the
MAIN PCB.
2) Appearance when disassembly is
complete.

Samsung Electronics 4-1
Troubleshooting
4. Troubleshooting
4-1 Checkpoints by Error Mode ................................................................4-2
4-2 Upgrade Methods.................................................................................4-14

4-2 Samsung Electronics
Troubleshooting
4-1 Checkpoints by Error Mode
4-1-1 If there is no power
Is there power after
charging the Battery?
Replace BATTERY and check again
Yes
No
C40 → 1.8V, C45 → 3.0V
Power Check
No
No
No
BATTERY Power Check
TP1, TP2 Check
Does the X-TAL1 CLOCK appear?
No
Defective
Yes
Done
Yes
Yes
Yes
Refer to wave pattern
image of Fig. 4-2.
Check the charge in the BATTERY unit
Refer to wave pattern
image of Fig. 4-1.
Refer to wave pattern
image of Fig. 4-3.
The power does not turn on.
Is the firmware upgraded?
(see 4-2 Upgrade Methods))

Samsung Electronics 4-3
Troubleshooting
 MAIN Page, 7-3
Voltage/DIV: 1.0V/div
TIME/DIV: 500us/div
Voltage/DIV: 1.0V/div
TIME/DIV: 500us/div
CON2
MIC1
IC12
IC3
IC6
IC4
IC11
IC7
IC1
JACK1
5
4
3
2
1
AB
1
2
3
4
5
BA
0 0
 MAIN PCB Bottom Page, 6-4
<Fig. 4-1>
1
2
1
2
1
2

4-4 Samsung Electronics
Troubleshooting
 MAIN Page, 7-3
Voltage/DIV: 0.5V/div
TIME/DIV: 20us/div
CON2
MIC1
IC12
IC3
IC6
IC4
IC11
IC7
IC1
JACK1
5
4
3
2
1
AB
1
2
3
4
5
BA
0 0
 MAIN PCB Bottom Page, 6-4
<Fig. 4-2>
3
3
3

Samsung Electronics 4-5
Troubleshooting
 MAIN 7-3 Page
Voltage/DIV: 2.0V/div
TIME/DIV: 100us/div
CON2
MIC1
IC12
IC3
IC6
IC4
IC11
IC7
IC1
JACK1
5
4
3
2
1
AB
1
2
3
4
5
BA
0 0
 MAIN PCB Bottom 6-4 Page
<Fig. 4-3>
4
4
4

4-6 Samsung Electronics
Troubleshooting
4-1-2 If no sound is heard
Finished
Replace Board.
(Requires close inspection)
Yes
No
Yes
Yes
Yes
Yes
Yes
Replace earphones
No
No
No
Yes
No
No
No
No
Yes
Replace Jack
Refer to wave pattern
image of Fig. 4-4.
No Sound
Are the earphones
inserted normally?
Does the
same symptom persist
even after replacing the
earphones?
Does
the R/L-CH come out
normally?
Does the
YEPP LOGO SONG
play?
Does it
play after adding solder to the
JACK?
Can audio
stoppage or interference be
heard?
Can it be
heard when playing other
files?
Do the
symptoms appear even
after upgrading to the latest
firmware?

Samsung Electronics 4-7
Troubleshooting
 MAIN Page, 7-3
Voltage/DIV: 0.5V/div
TIME/DIV: 500ms/div
CON2
MIC1
IC12
IC3
IC6
IC4
IC11
IC7
IC1
JACK1
5
4
3
2
1
AB
1
2
3
4
5
BA
0 0
 MAIN PCB Bottom Page, 6-4
<Fig. 4-4>
1
1
1
1

4-8 Samsung Electronics
Troubleshooting
4-1-3 Trouble When to Connecting to PC
Done
No
Yes
Yes
Does it connect
after charging for more than
15 seconds?
USB Connection
Does “Charging” appear?
Is there a "U4"
portable disk?
Is the USB port not
stuck upside down?
No Is there a USB mass
storage device in the
"Device Manager"?
Yes
Is there a "YP-U4 USB
Device" in "Disk Drives"?
No
Does it update with
the "Updater"?
Is there ACCESS? Does it format in
Windows Explorer?
Check if any collision for the
disk drive volume.
Yes
No
Does it connect
after replacing the BOTTOM
CABINET?
Replace PCB ASSY
No
Yes
No
No
No
Yes
Yes
No
Yes
Yes

Samsung Electronics 4-9
Troubleshooting
4-1-4 When the TOUCH PAD Is Not Operating
Turn the HOLD switch to OFF.
Disassemble it and check if the
TOUCH FPCB is properly
connected to the Connector
Done
Disassemble the body and check if
the TOUCH PAD has come loose
from the device
Yes
No
Yes
No
Yes
No
Is the SWITCH turned to HOLD OFF?
Do the TOUCH KEYS respond?
Is the TOUCH PAD malfunctioning?
Check if the TOUCH PAD
operates normally