Samsung YEPP YP-Q1 User manual

SERVICE
Manual
YEPP
Model Name : YP-Q1
Model Code : YP-Q1JEW/XEE
YP-Q1JAW/XEE
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-Q1

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. Nov. 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 Disassembly Method........................................................................................3-1
4. Troubleshooting
4-1 Checkpoints by Error Mode..............................................................................4-2
4-2 Upgrade Methods.............................................................................................4-14
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 POWER............................................................................................................7-3
7-3 CPU PWR & MEM INF.....................................................................................7-4
7-4 CPU..................................................................................................................7-5
7-5 MEMORY ......................................................................................................... 7-6
7-6 AUDIO..............................................................................................................7-7
7-7 24PIN I/O, Interface .........................................................................................7-8

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
Superior Specs, Useful Features
- Large 2.4" LCD screen suited to viewing video
- Various features such as FM Radio, FM Recording and Voice Recording
Playback Time
- Over 30 hours of music / 4 hours of video playback possible
Elegant Lighting Effect
- Spectacular colored lighting created by expert lighting designer
The Part of Art (Color LED Effect)
- Product designed by expert lighting designer (ex: Ingo Maurer, EON SLD etc.)

2-2 Samsung Electronics
Product Specification
2-2 Specifications
Basic Specification
Rating DC 5.0V / 500mA
Built-in Battery Power 620mAh / DC 3.7V
File Compatibility
AUDIO : MPEG1/2/2.5 Layer3 (8kbps ~ 320kbps, 22kHz ~ 48kHz)
WMA (8kbps ~ 320kbps, 8kHz ~ 48kHz)
VIDEO : SVI (Video: MPEG4, Audio: MP3 (44.1kHz, 128kbps),
WMV (Video: WMV9 Simple Profile,
Audio: WMA Spec (Max 860kbps)
Resolution: 302 x 240, Frame Rate: 30fps)
IMAGE : JPEG (ISO/IEC 10918-1/Annex F-Sequential DCT based mode of
operation)
Supported Number of
Folders/Files Folder : Max. 1000 / File : Max. 6000 (including Folder)
Earphone Output 20mW/Ch. (France 5mW/Ch) (based on 16Ω)
Output Frequency Range 40Hz ~ 20kHz
Signal to Noise Ratio 90dB
Play Time
Music : Max. 30hours
(MP3 128kbps, Volume: 15, Normal Sound Mode, LCD Off)
Video : Max. 4hours (Brightness 5, Volume: 15,Normal Sound Mode)
Temperature Range for
Operation -5 ~ 35˚C (23 ~ 95˚F)
Case Plastic
Weight 65g
Dimensions (WxHxD) 51 x 98 x 10.9 mm
FM
FM Frequency 87.5 ~ 108.0MHz
FM Signal to
Noise Ratio 55dB
FM T.H.D 1%
FM Useable
Sensitivity 38dB

Samsung Electronics 2-3
Product Specification
2-3 Specifications Analysis
Model Name Q1 Nano Sony A600 SerieS Sansa E200 Series
Photo
Capacity 4GB/8GB/16GB 4GB/8GB 2GB/4GB/8GB 2GB/4GB/6GB/
8GB
LCD 2.4" TFT LCD
(320 x 240)
2" TFT LCD
(320 x 240)
1.8" TFT LCD
(320 x 240) 1.8" TFT LCD
Functions
Music
Video
FM Radio
FM Recorder
Voice Recorder
Text Viewer
Photo Viewer
Game
Music
Video
Text Viewer
Photo Viewer
Game
Music
Video
FM Radio
Line-in Recorder
Music
Video
FM Radio
FM Recorder
Voice Recorder
Sound Effect DNSe 2.0+ - DSEE -
Languages 33 Languages 17 Languages 10 Languages 7 Languages
File Support
MP3, WMA,
AAC, Ogg, JPEG,
MPEG4, TXT
MP3, AAC,
Audible, WAV,
AIFF, H.264
MP3, WMA, AAC,
MPEG4, JPEG MP3, WMA, RAX
Battery Time 30 Hrs / 4 Hrs 24 Hrs / 5 Hrs 33 Hrs / 9.5 Hrs 20 Hrs
Dimensions (WxDxH)
/ Weight
51 x 98 x 10.9
/ 65
69.8 x 52.3 x 6.5
/ 49.2
42 x 79 x 11.5
/ 50
44 x 89 x 13
/ 76

2-4 Samsung Electronics
Product Specification
2-4 Accessories
2-4-1 Supplied Accessories
Accessories Item Item code Remark
Earphones AH59-01886A
Samsung Service CenterUSB Cable AH39-00899A
Program Installation CD AH46-00063A

Samsung Electronics 3-1
Disassembly & Reassembly
3. Disassembly & Reassembly
3-1 Disassembly Method
- 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 CABINET-
BACK
1) Use a paperclip or tool on the A/S
hole in the bottom of the CABINET-
BACK to press it in a downward
direction and remove it.
2) Slowly lift one side of the ASS’Y
WINDOW-LCD and remove it starting
at the tape on both sides.
2 TOUCH-PAD 1) Remove the ASSY’ WINDOW-
LCD’s TOUCH-PAD FPCB from the
CONNECTOR.

3-2 Samsung Electronics
Disassembly & Reassembly
No. Part Name Description Description Photo
3 LCD-
MODULE
1) Use tweezers to remove the left
and right sides of the HOOK part of
the LCD-MODULE from the ASS’Y
CABINET-MIDDLE.
1Check the left side ventilation
groove.
2Use the tweezers to remove it
from the hook.
3 Check the right side ventilation
groove.
4 Use the tweezers to remove it
from the hook.
2) Use the upper part’s ventilation
groove to remove the
LCD-MODULE.
1Use the upper left ventilation
groove to remove the
GROUND SHRRT.

Samsung Electronics 3-3
Disassembly & Reassembly
No. Part Name Description Description Photo
4 CABINET-
MIDDLE
1) Remove the 6 screws.
:PH (PI2.5),+,M1.4,L3.5,ZPC (BLK)
5 MAIN-PCB 1) Carefully pick up the MAIN PCB and
remove the BATTERY CONNECTOR.
2) Remove the BATTERY and the MAIN
PCB.

3-4 Samsung Electronics
MEMO

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
Oscilloscope Setting Values
Voltage/DIV 1V/div
TIME/DIV 10ms/div
4-1-1 No Power
Symptom Power does not turn on.
Major Checklist
1Check the power terminal connection (battery, adapter).
2Check if the key signal is ‘HIGH’ when the POWER key is pressed.
3Check 7WH74_IC301 the DODC_EN is ‘HIGH’.
4Check power. (L301: 1.1V(CPU Core), L302: 3.0V(MAIN))
Caution Be careful not to short anything out when checking the power line.
The power does not turn on.
After insert battery to PCB,
Please TEST
No Is battery inserted to Main PCB
normally?
Yes
Does the power turn on after
recharging the battery?
Yes
No
Completion
A

Samsung Electronics 4-3
Troubleshooting
Check power at the BATTERY
(single part).
Recheck after replacing the battery.
4
Check power.
L301: 1.1V(CPU Core)
L302: 3.0V(MAIN)
No
No
1
Check the power terminal connection
(Battery, Adapter)
Check MAIN 12Mhz clock
No
Defective
YesYes
No
Yes
A
Refer to wave pattern
image of Fig. 4-1.
Completion
3
Check 7WH74_IC301 the
DODC_EN is ‘HIGH’.
2
When power Key is on,
check key signal as ‘HIGH’?
Refer to wave pattern
image of Fig. 4-1.
Yes
Yes
No
Refer to wave pattern
image of Fig. 4-1.

4-4 Samsung Electronics
Troubleshooting
C
C302
10000nF
6.3V
C301
10000nF
6.3V
C305
10000nF
6.3V
C311
100nF
C310 22nF
C314
4700nF
C316
10000nF
C318
4700nF
C313
4700nF
C315
4700nF
C303
100nF C307
100nF
C306
100nF
C308
100nF
C300
1000nF
6.3V
C312
100nF
C320
10000nF
C304
100nF
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GNDGND
GND
GND GND GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
INT_BATT
P3.0V
INT_BATT
P1.8V
P3.0V
P1.1V
INT_BATT
P3.0V
P5 V
INT_BATT
V_DDCON
P3.0V
V_DDCON
V_DDCON
V_DDCON
P5 V
INT_BATT
INT_BATT
INT_BATT
P3.0V
P5 V
CON300
2P,SMD-A
1
2
HOLD PWR_IN_CPU
PWR_IN_DDCON
FULLCHG_DET
CPU_RST
LED_A+
LED_C-
DCDC_EN
EXT_PWR
BATT_LEV
Q3 0 3
KRC408V
Q3 0 5
KRC408V
R3 2 1
1K
R307 200K
R308 100K R302
10K R311
120K
R324
47K
R301
47K
R319
10K R322
47K
R314
47K
R318
47K
R300
47K
R305
4.3KOHM R304
3.6K
R326
47K
R317
47K
R310 240K R309
100K
R306
20Kohm
R325
24ohm
R312 150K
R303 120K
R316
47K
R3 1 3
47 K
R320
47K
R3 1 5
10Kohm
L3 0 2 4.7uH
L3 0 0 4.7uH
L3 0 1 4.7uH
CHG_DLIM1
CHG_DLIM2
CHARGE_SUSP
LED_CTL
DCDC_EN
COREV_CTRL
PWR_OFF
RTC_INT
PWR_IN_DDCON
D301
RB551V-30
S/W300
4V
1234
S/W301
12VDC
12
D3 0 0
KDS121V
D3 0 2
KDS121V
IC300
MAX8819
1
COMP4
2
FB 4
3
OV P 4
4
PG 4
5
LX 4
6
GN D
7
EN 4
15
CH G
16
PG 1
17 LX 1
18 PV 1 3
19
LX 3
20
PG 3
21
DLIM1
22
FB2
23
FB3
24
EN123
25
PV2
26
LX2
27
PG2
28
DLIM2
12
CEN
10
SYS
8
RST1
13
FB1
11
DC
9
BAT
14
CISET
L3 0 3 1 0 u H
IC301
7WH74
1 CK
2D
3 Q
4 GND 5
Q
6
CLR
7
PR
8
VCC
R3 2 3
9.1Kohm
Q3 0 2
EM D 2
1
2
34
5
6
Q3 0 0
KRC857E
1
2
3
4
5
6
TP300
?
TP301
?
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
C
C302
10000nF
6.3V
C301
10000nF
6.3V
C305
10000nF
6.3V
C311
100nF
C310 22nF
C314
4700nF
C316
10000nF
C318
4700nF
C313
4700nF
C315
4700nF
C303
100nF C307
100nF
C306
100nF
C308
100nF
C300
1000nF
6.3V
C312
100nF
C320
10000nF
C304
100nF
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GNDGND
GND
GND GND GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
INT_BATT
P3.0V
INT_BATT
P1.8V
P3.0V
P1.1V
INT_BATT
P3.0V
P5V
INT_BATT
V_DDCON
P3.0V
V_DDCON
V_DDCON
V_DDCON
P5V
INT_BATT
INT_BATT
INT_BATT
P3.0V
P5V
CON300
2P,SMD-A
1
2
HOLD PWR_IN_CPU
PWR_IN_DDCON
FULLCHG_DET
CPU_RST
LED_A+
LED_C-
DCDC_EN
EXT_PWR
BATT_LEV
Q303
KRC408V
Q305
KRC408V
R321
1K
R307 200K
R308 100K R302
10K R311
120K
R324
47K
R301
47K
R319
10K R322
47K
R314
47K
R318
47K
R300
47K
R305
4.3KOHM R304
3.6K
R326
47K
R317
47K
R310 240K R309
100K
R306
20Kohm
R325
24ohm
R312 150K
R303 120K
R316
47K
R313
47K
R320
47K
R315
10Kohm
L302 4.7uH
L300 4.7uH
L301 4.7uH
CHG_DLIM1
CHG_DLIM2
CHARGE_SUSP
LED_CTL
DCDC_EN
COREV_CTRL
PWR_OFF
RTC_INT
PWR_IN_DDCON
D301
RB551V-30
S/W300
4V
1234
S/W301
12VDC
12
D300
KDS121V
D302
KDS121V
IC300
MAX8819
1
COMP4
2
FB4
3
OVP4
4
PG4
5
LX4
6
GND
7
EN4
15
CHG
16
PG1
17 LX1
18 PV13
19
LX3
20
PG3
21
DLIM1
22
FB2
23
FB3
24
EN123
25
PV2
26
LX2
27
PG2
28
DLIM2
12
CEN
10
SYS
8
RST1
13
FB1
11
DC
9
BAT
14
CISET
L303 10uH
IC301
7WH74
1 CK
2D
3 Q
4 GND 5
Q
6
CLR
7
PR
8
VCC
R323
9.1Kohm
Q302
EMD2
1
2
34
5
6
Q300
KRC857E
1
2
3
4
5
6
TP300
?
TP301
?
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
POWER Page, 7-3
CON801
CON804
CON802
IC401
IC601
IC700
IC702
MAIN PCB Top Page, 6-2
CON800
IC400
IC600
IC301
IC300
IC602
IC701
CON300
IC800
MAIN PCB Bottom Page, 6-4
<Fig. 4-1>
4
4
4
2
3
4
L300
4
L301
4
L302
4
4
4
3
2
2
3

Samsung Electronics 4-5
Troubleshooting
4-1-2 No Sound
Symptom No output at earphones
Major Checklist
Check if the earphones are normal. / Check the cold solder on the earphones jack.
1Check if the DCVDD POWER input to the CODEC is proper. (Check for 1.8V)
2Check if the AVDD1, AVDD2 power input to the CODEC is proper. (Check for 3.0V)
Are the earphones
normal?
Do R/L-CHs output
normally?
Are there skips and
noises?
Are the skips and
noises even when playing
another file?
Does the
same symptom persist
even after upgrading the
firmware to the latest
version?
Yes
No
Yes
Yes
Yes
Yes
Yes
Does the same
symptom persist even
after replacing the
earphones?
No
No
No
No
Yes
Yes
No
1
Is audio codec
voltage a normally?
DCVDD: 1.8V Check
Power Defective
Replace the earphones
No
Yes
Yes
No Sound
Does the YEPP
Logo Song play?
Does it play after
supplementing the solder
on the jack?
Check if FET700 is shorted.
Check if IC701 is shorted.
No
2
Is audio codec
voltage a normally?
AVDD1, AVDD2: 3.0V
Check
No
Refer to wave pattern
image of Fig. 4-2.
Replace the BOARD
(needs thorough examination).

4-6 Samsung Electronics
Troubleshooting
C716
330uF
2.5V
C717
330uF
2.5V
C723 10nF
C711
100nF
C709
100nF
C729 10nF
C730
10nF
C702
1000nF
C703
1000nF
C701
1000nF
C700
1000nF
C732
1000nF
C731
1000nF
C725
1000nF
C724
1000nF
R703
10Kohm
R705
10Kohm
R701 220K
R718
1K
R720
100K
R712
4.7K
R711 4.7K
R724
100K
R723
100K
R722 1K
R721 1K
LOUT_EP
ROUT_EP
AUD_BCLK
AUD_LRCK
AUD_DAO
AUD_MCLK
MUTE
32.768_OUT
I2C_CLK0
FM_ANT
FM_BUS_EN
EP_TEST_L
EP_TEST_R
DCDC_EN
GND
GND
GND
GND
GND
GND
GND
GND GND
GND
GND
GND
GND
GND
GND
HP_DET
FM_ANT
LOUT_EP
AUD_DAI
ROUT_EP
P3.0V
P1.8V
P3.0V
P3.3V
P3.0V
P3.3V
V_DDCON
P3.3V
L702
1000
L703 1000
L701
60
I2C_DAT0
I2C_CLK0
FM_SEARCH
I2C_DAT0
FET700
FDMA1028NZ
1 S1
2G1
3 D2_1
4 S2 5
G2
6
D1_1
7
D1_2
8
D2_2
IC701
WM1808
1
LIP
2
LIN
3
L2/GPIO2
4
R2/GPIO3
5
DACDAT
6
LRC
7
BCLK
8
ADCDAT
9
MRCK
10
DGND
11
DCVDD
12
DBVDD
13
CSB/GPIO1
14
SCLK
15
SDIN
16
MODE
17
AUXL
18
AUXR
19
OUT3
20
ROUT2
21
AGND2
22
LOUT2
23
AVDD2
24
VMID
25
AGND1
26
ROUT1
27
LOUT1
28
AVDD1
IC702
S-1323B33PF
1
VOUT
2
VIN
3
ON/OFF
4
VSS
MIC700
3.6V
1
23
4
JACK700
AJ398F
1
4A
4B
5A
5B
EXT_FM_ANT
R700
0
R702
270K
ROUT_EXT
LOUT_EXT
C713
1000nF
C705
1000nF
P3.3V
IC700
Si4703
1
NC_1
2
FMIP
3
RFGND
4
GND_1
5
RST
6
SEN
7
SCLK
8
SDIO
9
RCLK
10
VIO
11
VD
12
GND_2
13
ROUT
14
LOUT
15
GND_3
16
VA
17
GPIO3
18
GPIO2
19
GPIO1
20
NC_2
C718
1000nF
GND
P3.0V
C728
0.1nF
R708 1K
C719 10nF
GND
C704
100nF
C706
100nF
C710
100nF
C715
100nF
R706
220
R707
220
D700
GND
L700
8.2nH
C707
10uF C714
10uF
C708
10uF
C712
10uF
C726
10uF
10V
C720
2200nF
1
6
5
4
AUDIO Page, 7-7
CON800
IC400
IC600
IC301
IC300
IC602
IC701
CON300
IC800
MAIN PCB Top Page, 6-4
<Fig. 4-2>
1
1
12
2
2

Samsung Electronics 4-7
Troubleshooting
4-1-3 FM Tuner does not work.
Symptom No FM radio reception
Major Checklist 1Check C724 FM_VDD on 3.3V
2Check FM_Clock of 32.768KHz from RTC clock output
Is Si4702 Chip set to
ENABLE? (IC700 5PIN)
Completion
Yes
No
Yes
No
Are the earphones plugged in?
Yes
No Connect an earphone & check again
No
Activate the FM radio.
2
Is 32.768 KHz CLOCK being
inputted normally?
1
Check the power terminal.
C724: 3.3V
Replace the BOARD
(needs thorough examination).
Refer to wave pattern
image of Fig. 4-3.
Refer to wave pattern
image of Fig. 4-3.
Is RTC CLOCK functioning normally?