Samsung P300 Service Manual
GSM TELEPHONE
SGH-P300
GSM TELEPHONE
CONTENTS
1. Specification
2. Flow Chart of Troubleshooting
3. Exploded Views and Parts List
4. Electrical Parts List
5. PCB Diagrams
6. Block Diagrams
1. SGH-P300 Specification
1-1. GSM General Specification
GSM900
Phase 1
Freq. Band[MHz]
Uplink/Downlink
ARFCN range 1~124
Tx/Rx spacing 45MHz 45MHz 95MHz 80MHz
Mod. Bit rate/
Bit Period
Time Slot
Period/Frame
Period
Modulation 0.3GMSK 0.3GMSK 0.3GMSK 0.3GMSK
MS Power 33dBm~13dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm
890~915
935~960
270.833kbps
3.692us
576.9us
4.615ms
EGSM 900
Phase 2
880~915
925~960
0~124 &
975~1023
270.833kbps
3.692us
576.9us
4.615ms
DCS1800
Phase 1
1710~1785
1805~1880
512~885 512~810
270.833kbps
3.692us
576.9us
4.615ms
PCS1900
1850~1910
1930~1990
270.833kbps
3.692us
576.9us
4.615ms
Power Class 5 p cl ~ 1 5 p cl 5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl
Sensitivity -102dBm -102dBm -100dBm -100dBm
TDMA Mux 8 8 8 8
Cell Radius 35Km 35Km 2Km -
1
1-
SGH-P300 Speclflcation
1-2. GSM Tx Power Class
TX Power
control level
5 33±2 dBm
6 31±2 dBm
7 29±2 dBm
8 27±2 dBm
9 25±2 dBm
10 23±2 dBm
11 21±2 dBm
12 19±2 dBm
13 17±2 dBm
14 15±2 dBm
15 13±2 dBm
16 11±3 dBm
17 9±3dBm
18 7±3 dBm
19 5±3 dBm
GSM900
TX Power
control level
0 30±3 dBm
1 28±3 dBm
2 26±3 dBm
3 24±3 dBm
4 22±3 dBm
5 20±3 dBm
6 18±3 dBm
7 16±3 dBm
8 14±3 dBm
9 12±4 dBm
10 10±4 dBm
11 8±4dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
DCS1800
TX Power
control level
0 30±3 dBm
1 28±3 dBm
2 26±3 dBm
3 24±3 dBm
4 22±3 dBm
5 20±3 dBm
6 18±3 dBm
7 16±3 dBm
8 14±3 dBm
9 12±4 dBm
10 10±4 dBm
11 8±4dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
PCS1900
15 0±5 dBm
2
1-
15 0±5 dBm
2. SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
2-1.Baseband
2-1-1. Power ON
'Power On' does not work
Yes
Check the current
consumption more
than 100mA
Yes
Check the VBAT
more than 3.3V
Yes
Check the
VLDO7_1.8V
of UCP300 is more
than 1.8V
Yes
Check VCCD_1.6
of U300=1.6
Yes
No
No
No
No
Download again
Charge the Battery
①
Check UCP300 and C310
②
Check C337 of UCP300
and U300
③
Check VRF of
UCP300=2.8V
Yes
No
Check UCP300
and C313
④
Check TCX100 pin#6
Freq = 13MHz
Vp-p > 0.8V
Yes
Check the initial operation
Yes
END
2-1
No
Checktheclockgeneration
circuit(TCX100)
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This Document can not be used without Samsung's authorization
SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
VBAT
VCCD_1.8CON
R300
U300
SW
FB
5
4
TA300
1
2
3
VIN
GND
EN
2-2
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
L300
VCCD_1.6
C305
SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
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2-3
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
2-1-2. Initial
Initial Failure
Yes
Check VCCD,
VCCD_1.8CON of
UCP300 "High" when
the phone is boot on
Yes
Check
the VCCD_1.6V of
U300 is "High"
Yes
LCD display is O.K?
Yes
Sound is O.K?
Yes
END
No
No
No
No
①
Check UCP300
②
Check U300
③
Check HDC401 and LCD part
Check audio part
2-4
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
VCCD_1.8
VCCD
VCCD
HDC401
11
1314
15
1718
19
2122
23
25
27
29
1
1
3
3
5
56
7
7
9
9
11
13
15
17
19
21
23
25
27
29
FLASH_RESET
LCD(0)
LCD_WEN
MLCD_CS
V400
2
2
4
10
12
14
16
18
20
22
24
26
28
30
4
6
8
8
10
12
16
20
24
26
28
30
LED+ LED-
LCD(15)
LCD(13) LCD(14)
LCD(11) LCD(12)
LCD(9) LCD(10)
LCD(7) LCD(8)
LCD(5) LCD(6)
LCD(3) LCD(4)
LCD(1) LCD(2)
L_ADS
2-5
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SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
2-1-3. Sim Part
Phone can't access
SIM card
Check the pin 1 of
SIM400
Voltage = 3V
YES
NO
①
Check the circuit related to
UCP300
Check the SIM
connector's
(SIM400)
connector's to SIM
card
YES
Check the circuit around SIM400
input circuitry
YES
Check the circuit around
UCP300 output
and voltage supply circuitry
YES
END
NO
NO
NO
②
resolder or change
SIM400
③
Check the related circuit of
SIM400
④
Check the related circuit of
UCP300
2-6
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VSIM
SIM_RST
SIM_CLK
SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
SIM400
6
11
22
33
6
5
5
4
4
7GG89GG10
SIM_IO
C419
C420 C422C421
C423
2-7
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SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
2-1-4. Charging Part
Abnormal charging part
Yes
①
The pin #19,#20 of
IFC405 is
VEXT뵃5V?
No
Replace TA,Check IFC405
Yes
The pin #4 of TR402
is "high"?
Yes
The pin #5 of U405 is
"low"?
Yes
The pin #7 of U405
is 3.2~4.2V?
Yes
The ISET=1.4V(during
charging) and
<=0V(full charging)?
Yes
END
No
No
No
No
②
Check the TR402
③
Check the U405,R411
④
Check the U405
⑤
Resolder or change R417
2-8
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SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
AUXIOP
AUXION
EAR_R
EAR_L
EAR_SWITCH
JACK_INT
SDS_TXD
SDS_RXD
JIG_ON_IF
USB_D+
USB_D-
TA_VEXT
R408
R410
1
0
4
V
VCCD_1.8
4
0
4
R
6
2
4
C
TA401
TA402
VBAT USB_5V
3.8V
IFC405
1
1
2
2
3
3
4
4
5
5
6
6
7
R420
R421
R407
R409
R403
6
5
7
1
ZD402
4
C448
2
8
3
C425
6
5
4
0
4
0
4
D
Z
9
3
4
C
9
8
3
4
C
5
4
4
4
C
C
1
ZD401
2
3
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
22
23
24
25
NC
NC
26
NC
NC
27
NC
NC
28
NC
NC
TA_VEXT
ICHRG
C443
C444
R417
1
2
3
4
VL
IN
GND
ISET
U405
_CHG
BATT
_ACOK
9GG1011GG12
_EN
VBAT
3.8V
8
7
6
5
CHG_DET
CHG_OFF
R411
TA403
C445
2-9
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SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
R414
JIG_ON_IF
TA_VEXT
1
B
2
A
R415
R416
VCC
GND
VBAT
3.8V
5
Y
3
TR402
4
JIG_ON
2-10
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SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
2-1-5. Microphone Part
Microphone does not work
Check the
assembled status of
microphone.
YES
Check the reference
voltage on mic path
R524=2.4V
YES
Is microphone ok?
YES
END
NO
NO
NO
Reassemblage microphone
resolder or change
(R522,C534,R524,C539,
R535,)
Check UCP300
2-11
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SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
VCCA
2.8V
R522
CAM_MIC
MICINP
MICINN
MICOUTN
R529
R534
R526
R530
C536
C544
R524
R535
TA504
R545
C538
C546
R539
R540
MIC+
MIC-MICOUTP
C539
2-1-6. Speaker Part
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2-12
Speaker does not work
SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
Is the terminal of
Speaker OK?
O.K.?
YES
Check the
pin 2 of U501 = " L OW"
YES
Check the circuit
around U501
YES
Check the Pin10
of UCP300 = "LOW"
NO
NO
NO
NO
Resolder the board
to speaker
①
Change or resolder
R503,R507
②
Change or resolder
C503,C505,R501
R506,L500,L501
③
Check UCP200
YES
Check the Pin2
of UCP300 = "LOW"
YES
Check the
C554,C555,C556,C557
YES
Is speaker OK?
YES
END
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NO
NO
NO
④
Check UCP300
⑤
Change or resolder
C554,C555,C556,C557
Change speaker
2-13
SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
2-14
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SGH-P300 Flow Chart of Troubleshooting and Circuit Diagrams
VCCD
2.8V
AOUTAP
SPK_P
MELODY+
AUDIO_OUT_SEL
AOUTAN
SPK_N
MELODY-
R503
R507
C501
LOUT
14
17
D
N
NC
NC
1S2
1-2IN
2S1
D2
G
5
U501
2
S
2
6
21
22
1
2
3
4
1316
15
1
D
D
N
G
2
1
+
S
S
V
4
1
12
D4
11
4S1
3-4IN
3S2
1
3
S
D
3
8
7
10
R543
9
EAR_L
EAR_PHN_L
EAR_OUT_SEL
ROUT
EAR_R
EAR_PHN_R
R544
VCCD
2.8V
AOUTBP
MP3+
MSPK+
SPK_PHN_EN
AOUTBN
MSPK-
MP3-
C500
R546
R547
R548
R549
21
22
1
2
3
4
17
NC
NC
1S2
1-2IN
2S1
D2
D
N
G
5
15
1
D
U500
D
2
N
S
G
2
6
14
1316
2
1
+
S
S
V
1
4
12
D4
11
4S1
10
3-4IN
9
3S2
1
3
S
D
3
7
8
2-15
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AMPINP
EAR_PHN_L
AUDIO_OUT_SEL
AMPINN
EAR_PHN_R
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