Samsung YP-20S/T User manual

DIGITAL AUDIO PLAYER
YP-20S/T
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. FEB. 2001
Printed in Korea
AH68-00817A

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-20S/T
12MHz, 16bit CISC
Built-in Memory 32MB (YP-20T)/64MB (YP-20S)
1.5V
ONE AAA-Size/4-hr or longer playing time (with alkaline batteries)
42x70x22.1mm /32G
Plastic
2.4Mbps at least
85dB
5mW
20Hz - 20KHz
Model
Processor
Memory Capacity
Power
Battery
Dimensions (W x H x D)
Case
File Transmission Speed
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
Forward / Reverse button
Volume control button
LCD
Stop / Play
Pause button
Mode / Menu button
SAMSUNG
Earphone jack
Battery Cover Lock
Connection cable
terminal
Battery Case

Location of Controls
3-2 Samsung Electronics
MEMO

Samsung Electronics 4-1
4. Troubleshooting
Symptoms Possible Causes Action Remark
No Power Faulty U8, Q4 Replace Main PCB
Faulty Display Faulty LCD Replace LCD
Faulty Download Faulty J1 J1 soldering Check
When connected “CONNECT” character will not disolay on LCD window.
Faulty U2, Y1 Replace Main PCB
No Sound Faulty U8, U10 Replace Sub PCB

Troubleshooting
4-2 Samsung Electronics
MEMO

Samsung Electronics 5-1
5. Exploded View and Parts List
Œ
ŒAH97-00726A ASSY CABINET TOP;ABS,YP-20S/T,BROWN YP-20S
AH97-00725A ASSY CABINET TOP;ABS,YP-20S/T,BLUE YP-20T
´AH97-00728A ASSY CABINET BOTTOM;ABS,YP-20S,64MBYTE YP-20S
AH97-00727A ASSY CABINET BOTTOM;ABS,YP-20T,32MBYTE YP-20T
ˇAH71-00037A COVER-BATTERY;ABS,T1.0,-,-,IVORY,YP-20S/T
¨AH71-00038A CAP;RUBBER MOLD,T0.5,-,-,IVORY,YP-20S/T,-
ˆ6001-000809 SCREW;CH M2*L4 MACHINE
ØAH92-01036A ASSY PCB-MAIN;YP-20S/T,MAIN PCB ASSY COMMON
AH92-01070A ASSY PCB-MAIN;YP-20S/T,MAIN PCB ASSY,CHINA
CHINA/HONG KONG ONLY
∏AH67-00118A CASE BASKET;YP-20S/T,LCD COVER,SAMSUNG,SILVER,LCD
”AH07-00045A LCD;DCM-08B3FT-09,YP-MF64,-,30x60.35x1.7,BLK,-,0.3 COMMON
AH07-00054A LCD;DCM-08B3FT,YP-20S/T,CHINA,30*6
CHINA/HONG KONG ONLY
’AH92-01035A ASSY PCB-SUB;YP-20S,64MBYTE YP-20S
AH92-01034A ASSY PCB-SUB;YP-20T,32MBYTE YP-20T
˝AH59-00119A SPEAKER SYSTEM;YP-20S/T,SB-900NS,1MW,3MW/20MW
ÔAH39-00301A CABLE FORM;YD-138BK12,YP-MF64,4P,1.2M,-,-,PVC,BLAC
AH80-00021A INSTALL-CD;YP-20S/T,INSTALL CD,CD, DOMESTIC,-,-
´
’
Ø
˝
Ô

ˇ
¨
∏
”
ˆ
Loca-NO. Parts NO. RemarkDescription ; Specification

Exploded View and Parts List
5-2 Samsung Electronics
MEMO

Samsung Electronics 6-1
6. Block Diagram
Micom Controller (OKI MSM66Q573L) -12C control - Parallel & USB communication - Power control - Memory R/W - AD Key Control
MP3 decoder (STA015) - MP3 decoding - Digital volume control - DC/DC Converter
4-Key Including Button
USB
Interface
Power 1.5 x 1 (AAA) Battery
Clock
Generation OSC
(14.7456MHz)
D/A Converter (CS43L43) Earphone
Flash Memory
Internal ; 32M/64M
I C
PC CTR : 6
5
4
DATA : 8
DATA : 8 CTR : 6
U7 U8
Y2
Clock
Generation
OSC
(12MHz)
Timer
Generation
OSC
(32.768MHz)
U10
U4, U5
2

Block Diagram
6-2 Samsung Electronics
MEMO

Samsung Electronics 7-1
7. PCB Diagrams
7-1 MAIN
COMPONENT SIDE SOLDER SIDE

PCB Diagrams
7-2 Samsung Electronics
7-2 SUB
COMPONENT SIDE SOLDER SIDE

Samsung Electronics 8-1
8. Schematic Diagrams
USB
AD4
B
AD6
AD7
DEC_ON
PD7
PD6
/RE
CE0
AD1
PD5
PD0
DO
AD5
ALE
AD0
CLE
PD4
AD2
AD3
PD2
CE1
/RESET
PD1
PD3
/RESET
/WE
/WE
AD5
DEC_EN
I2C_CLK
D_CLK
DEC_EN
AD6
CE1
AD4
AD3
R/B
D_TXD
CLE
DAC_RST
I2C_DATA
ALE
I2C_DATA
CE0
/RE
R/B
D_TXD
I2C_CLK
AD2
AD0
AD7
DAC_RST
D_CLK
B
USB_RESET
USB_A0
USB_WR
PD4
D-
PD7
PD0
PD6
D+
USB_RESET
PD3
PD5
PD2
PD1
WP
PLAY_STOP
WP
DO
DI
DEC_REQ
DEC_REQ
DEC_RST
USB_CHECK
AVCC_ON
DEC_ON
AVCC_ON
AD1
DEC_RST
USB_RD
USB_RD
USB_INT
USB_WR
USB_INT
DVCC
VCC
VCC
VCC
VBAT
VCC
VCC
VCC
AVCC AVCC0
DVCC
VBAT
VCC
AVCC0
VCC
DVCC
VCC
VCC
VCCDVCCAVCC VCC
VCC
VCC
VCC
R2
47K
R70
1M
R52
100K
C17
100nF
C42
100nF
R36
3.3K
C15
100nF
R57
100K
R8
1K
R34
100K R33
100K
Y2
32.768KHz
C35
100nF
R62
1M
C51
22pF
C45
47pF
C46
27pF
D3
RB161
C52
22pF
X2
12MHz
U7
MSM66573-TQFP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
P10-4
P10-5
P10-7
RXD1/P8-0
TXD1/P8-1
RXC1/P8-2
TXC1/P8-3
TM4OUT/P8-4
PWM2OUT/P8-6
PWM3OUT/P8-7
PWM0OUT/P7-6
PWM1OUT/P7-7
VDD
GND
HLDACK/P9-7
EXINT4/P9-0
EXINT5/P9-1
P9-2
P9-3
EXINT0/P6-0
EXINT1/P6-1
EXINT2/P6-2
EXINT3/P6-3
P6-4
P6-5
P6-6 P6-7 P5-4/CPCM0 P5-5/CPCM1 P5-6/TM0OUT P5-7/TM0EVT RES NM1 EA VDD XT0 XT1 GND OSC0 OSC1 VDD P11-0/WAIT P11-1/HOLD P11-2/CLKOUT P11-3/XOUT P11-6/TM9OUT P11-7/TM9EVT P3-1/PSEN P3-2/RD P3-3/WR
P0-0/D0
P0-1/D1
P0-2/D2
P0-3/D3
P0-4/D4
P0-5/D5
P0-6/D6
P0-7/D7
GND
P4-0/A0
P4-1/A1
P4-2/A2
P4-3/A3
P4-4/A4
P4-5/A5
P4-6/A6
P4-7/A7
P1-0/A8
P1-1/A9
P1-2/A10
P1-3/A11
P1-4/A12
P1-5/A13
P1-6/A14
P1-7/A15
A16/P2-0 A17/P2-1 A18/P2-2 A19/P2-3
VDD
VREF
AI0/P12-0 AI1/P12-1 AI2/P12-2 AI3/P12-3 AI4/P12-4 AI5/P12-5 AI6/P12-6 AI7/P12-7
AGND
RXD0/P7-0
TXD0/P7-1
GND
RXC0/P7-2
TM3OUT/P7-4
TM3EVT/P7-5
SIOCK3/P10-0
SIO3/P10-1
SIOO3/P10-2
P10-3
R26
100K
R19
100K
C16
100nF
C13
100nF
R30
10
J4
CON7
1
2
3
4
5
6
7
S4 PLAY_STOP
J7
CON30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Q3
KST2907A
L4
10uH
+
C14
220uF
R23
NC R24 NC
+
C1
47uF
R1
100
U1
XC6371B
1
2
3
Vss
Vout
EXT
R3
100
Q4
XP161A1355PR
1
2
3
D1
RB500
Q1
KST2907A
R48
2.2k
R40
100k
R38
100k
R39
100k
S2 +
S3 FUNC
S1 -
U3
XC61C
3
2
1
VCC
GND
RST
R45
100k
R41
2.2k
R27
1M
R35
3.3K
C19
100nF
R16
100K
J10
CON1
1
J9
CON1
1
R32
47k
R9
22
J1
CON4
5
1
2
3
4
shild
R11
22
U2
PDIUSBD12
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
21
22
23
24
25
26
27
28
DATA0
DATA1
DATA2
DATA3
GND
DATA4
DATA5
DATA6
DATA7
ALE
CS_N
SUSPEND
CLKOUT
INT_N RD_N
WR_N
DMREQ
DMACK_N
EOT_N
RESET_N
GL_N
XTAL1
XTAL2
VDD
D-
D+
VOUT3
A0
L1
47uH
C6 68pF
C7
22pF
C4
100nF
Y1
6MHz
U6
93C56
1
2
3
4 5
6
7
8
CS
SK
DI
DO GND
ORG
WP
VCC
USB_CHECK
USB_A0
8-1 MAIN

Schematic Diagrams
8-2 Samsung Electronics
8-2 SUB
CLE
/WE
AD1
ALE
AD5
AD0
AD6
AD4
/RE
AD2
AD3
AD7
CE0
DEC_REQ
R/B
AD0
AD4
CE0
ALE
R/B
/RE
/WE
D_CLK
D_TXD
I2C_DATA
I2C_CLK
DEC_REQ
DEC_EN
DAC_RST
CLE
AD7
AD6
AD5
AD3
AD2
AD1
B
A
CLE
/WE
AD1
ALE
AD5
AD0
AD6
AD4
/RE
AD2
AD3
AD7
CE1
CE1
DEC_RST
DEC_RST
R/B
D_CLKDAC_RST
B
I2C_DATA
I2C_DATA
D_TXD
DEC_EN
I2C_CLK
VCC VCC
VCC
DVCC
VCC
DVCC AVCC0
DVCC
AVCC0
+
C44
1uF
+
C47
1uF
Q7
IRLML2502
Q6
IRLML2502
R73
100k
C24
100n U10
CS43L43
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16 LRCLK
SDATA
SCLK/DEM
VL
MCLK
DIF0/SCL
VQ_HP
REF_GNDFILT+
HP_A
GND
VA
VA_HP
HP_B
DIF1/SDA
RST
C20
100nF
R31
100k
J8
CON30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
B1
30
C40
1nF
C39
100nF
C30
47pF
R59
1k
C41
100nF
C25
47pF
C38
100nF
C34
4.7nF
R43
100K
C33
470pF
X1
14.7456MHz
R51
1M
R58
10
R44
100K
B2
30
C21
100nF
R71
100K
R37
100K
U8
STA015-TQFP
29
30
31
32
34
36
38
40
42
44
2
3
5
6 7
8
10
11
12
13
15
19
21
22
24
25
26
27
28
VDD_1
VSS_1
SDA
SCL
SDI
SCKR
BIT_EN
SRC_INT
SDO
SCKT
LRCKT
OCLK
VSS_2
VDD_2 VSS_3
VDD_3
PVDD
PVSS
FILT
XTO
XTI
VSS_4
VDD_4
TESTEN
SCANEN
RESET
VSS_5
CLK/D_REQ
GND
C11
100nF
U5
KM29U256T
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
N.C
N.C
N.C
N.C
N.C
SE
R/B
RE
CE
N.C
N.C
VCC
VSS
N.C
N.C
CLE
ALE
WE
WP
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
I/O0
I/O1
I/O2
I/O3
N.C
N.C
N.C
VSS
VCC
N.C
N.C
N.C
I/O4
I/O5
I/O6
I/O7
N.C
N.C
N.C
N.C
J5
PHONEJACK STEREO 1
2
3
R29
10K
+
C27
1uF
C12
100nF
C23 100nF
R64
1K
R68
1K
R69
4.7
R63
4.7
U4
KM29U256T
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
N.C
N.C
N.C
N.C
N.C
SE
R/B
RE
CE
N.C
N.C
VCC
VSS
N.C
N.C
CLE
ALE
WE
WP
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
I/O0
I/O1
I/O2
I/O3
N.C
N.C
N.C
VSS
VCC
N.C
N.C
N.C
I/O4
I/O5
I/O6
I/O7
N.C
N.C
N.C
N.C
D6
RB500
C9
100nF C10
100nF
+
C43
100uF
+
C55
10uF
+
C58
1uF
+
C56
1uF
C36
100nF
R65
10
R7 100
+
C26 10uF
R10 100
+
C48
100uF
R72
100k
L2
47uH
L3
47uH