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7. Flow Chart of Troubleshooting
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7-1
7-1. Power On
Current consumption>=100mA
The set is not ' Power On '
Voltage >= 3.3V
Download again
Charge the Battery
pin#J12 of U300 >= 2.8VCheck U300 and C314
pin#A13 of U300 = 2.8V
Check U300 and C315
Check the clock signalat pin#3 of U102Freq = 26MHz ,Vrms ≥ 300mV
Check the clock generation circuit(related to U102)
END
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
pin#G11 = 1.8VNo
Yes
Check the +VBATT Voltage
Check the pin of U300
Check the initial operation
Check the current consumption
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Flow Chart of Troubleshooting
7-2
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Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
7-3
7-2. Initial
The pin#G11 of U300 = 1.8Vand
the pin#J12 of U300 ≒ 2.825V?
Initialization Failure
Check the U300(If it has some problem, adjust it.)
END
No
Yes
Is the pin#K9 of U300"Low -> High"?
Yes
Check the U20032.768kHz wave forms at
the C216 and C217
Check the LCD Part
Yes
No
Yes
Yes
The Voltage is "High" atthe C313
Check the Audio Part
No
Check the U300(If it has some problem, adjust it.)
Check the U300
LCD display is O.K
No
No
Yes
Yes
Sound is O.K
No
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Flow Chart of Troubleshooting
7-4
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Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
7-5
7-3. SIM Part
Are there any Signals atpin#N9, #R10, #P10 of U300?
"Insert SIM" is displayed on the LCD
Check the U200
Check the SIM Card
END
No
Yes
Yes
Yes
No
Check the U300Are there any Signals at
pin#K12, #K11, #K14, #J11 ofCN100?
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Flow Chart of Troubleshooting
7-6
7-4. Charging Part
The pin#17, #18 ofCN701 is TA_VEXT ≒
5V ?
Abnormal charging operation
Replace TA or Check CN701
No
END
Yes
The pin#8 of U301 is 3.2~4.2V ?Check the U301
No
Yes
No
Solder again or change R310
Yes
The ICHRG = 1.4V(during
charging) and ≒ 180mV(full
charging) ?
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Flow Chart of Troubleshooting
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7-7
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Flow Chart of Troubleshooting
7-8
VC
CA
C303
C311
R14 VREGP M13
VR
TC H
11 V
SIM
K12
G5 VSS1
K4 VSS2 VSS3 R2 VSS4 P6
VXVCM R13
XOENAQ D1
VL5S
_A D
10 C
9 V
L5S_B
VLD
O_1 G
11 V
LDO
_2 J12 A
13 V
LDO
_3 V
LDO
_4 B12
VLD
O_5 B
10
VLD
O_6 A
14 V
LDO
_7 C12
VR
EF A
10
VREGN
VDDB A6
VDDD N11
VDDV L11
VDD_IO1 N5 J4 VDD_IO2
C4 VDD_OCTL
VE
XT E
14
VIB
_DR
V F
15
VIB_RNG_EN L9
VL4S
_A A
12 V
L4S_B
B11
P10
UP
_RS
T R10
VA
CC
F14
VB
AT E
13
VDD1 J3
VD
D12 J13
VDD2 M3 VDD3 N6
VD
D34 C
11
VDD5 C10 VDD67 B13
SD
O_P
SC
N7
SE
RC
K
C2
SE
RD
A
C1
B1
SE
RLE
1 S
ER
LE2
A2
SIM
_CLK
K14
SIM
_IO J11
SIM
_RS
T K11
TXP E7
UP
_CLK
N9
UP
_IO
RESET_O K9
RIN
G_D
RV
F13
RTC
_ALM
N H
10
RTC_CLK N4
RW
N
L2
RXTXIN D6 RXTXIP D7
RXTXQN C6 RXTXQP C7
SC
LK_P
SC
L8
M7
SD
I_PS
C
A4
G6
OC
TL5 O
CTL6
B3
A3
OC
TL7
PSW1_BUF L7
PWR_KEEP M9
PWR_SW1N C15 PWR_SW2 C14
RAREF1 B6 RAREF2 B5
R3
RE
SE
TN_C
SP
N14
MICOUTN P15 MICOUTP N15
MODE N10
1 NC5 NC6 2
NC7 P5
OC
TL0 E
6 C
5 O
CTL1
OC
TL2 F5 E
5 O
CTL3
OC
TL4
GND_HCUR F11
GND_OCTL B4
GND_PSC1 B15 GND_PSC2 K15
INTRQ L10
L3 I|O
LE
D1_D
RV
G13
LE
D2_D
RV
G12
R6 MC
MICINN M14 MICINP
J10 GNDS17 K10
GNDS2 F8 GNDS3 F9 GNDS4 F10 GNDS5 G7 GNDS6 G8 GNDS7 G9
G10 GNDS8 GNDS9 H6
GNDV P13
P3
F6 GNDB
GNDD M10
GNDQ E8
F7 GNDS1
GNDS10 H7 GNDS11 H8
H9 GNDS12
J7 GNDS13 GNDS14 J8 GNDS15 J9 GNDS16
DB
14 D
3 D
B15
D2
DB
2 K
3 J5
DB
3 D
B4
J6 D
B5
H5
G3
DB
6 D
B7
G4
DB
8 F4
DB
9 F1
DINTR
K8
DAICK R4
L6 DAIDI DAIDO M6
DAIRN P4
DB
0 K
1 D
B1
K2
DB
10 F2
DB
11 F3
DB
12 E
2 D
B13
E3
AOUTBN
R12 AOUTBP
L14 AUXINN AUXINP M15
L13 AUXOUTN AUXOUTP K13
D13 AUX_ADC3
CH
_BD
RV
E11
CH
_ISE
N F
12
CH
_RE
S D
14
E9
CR
EF
CS
N_P
SC
AB
4 N
2 A
B5
M2
M1
AB
6 A
B7
K7
AB
8 K
5
AD
C_A
UX
1 E10
AD
C_A
UX
2 D15
AFC D9
AOUTAN N12 AOUTAP P11
P12
U300
AB
0 K
6 P
1 A
B1
AB
2 L5 N
1 A
B3
VR
TC
TP305
TP310
VC
C_1.8A
C316
C313
1uF C
310
10V
VC
CD
C307
R300
TP307
C317
VR
F
9 G
G
10
11 2
2 33 4
4
5 5
6 6 7 G
G
8
CN
300
R302
C308
C304
U303
NE
G
PO
S
C327
VC
CB
C305
VR
TC
VR
F
C314
Q300
1 3 2
VC
CD
C315
C312
R303 R
304
TP306
VC
CD
V
CC
A
R309
R312
R310
C324
C325
C326
C301
R311
TP308
TP301
C309
VB
AT
C300
VB
AT
R308
6 _A
CO
K 8
_CH
G 5
_EN
R301
9
GG
10 11
GG
12
GN
D
3 2 IN
4 ISE
T
VL
1
U301 B
ATT 7
C318
C306
VC
CD
C302
C322
TP309
AUXOUTP AUXINN
AUXOUTN
EA
R_A
DC
V
BA
T
AOUTBP
TA_V
EX
T
ICH
RG
C
HG
_ON
CH
G_D
ET
INTR
Q
KE
Y_C
OL(2)
KE
Y_R
OW
(0)
PW
R_K
EE
P
XO
EN
A
PC
S_R
X_E
N
FLAS
H_R
ES
ET
DS
P_IO
D
SP
_RW
N
AUXINP
AOUTAN
AOUTBN
AOUTAP
RF_E
N
MICINN
MICOUTN
RT
CA
LA
RM
RTX
_IP
RTX
_QN
R
TX_Q
P
RTX
_IN
RST
KE
Y_B
L1
SIM
RS
T S
IMD
ATA
SIM
CLK
UP
_SD
O
VR
EF
DS
P_A
B(0)
UP
_SD
I
UP
_SC
LK
MICOUTP
MICINP
UP
_CS
AFC
TX
PO
WE
R
CLK13M_MC
CLK32K
DSP_INT
PWR_ON JIG_ON
DS
P_D
B(15)
DS
P_D
B(14)
DS
P_D
B(13)
DS
P_D
B(12)
DS
P_D
B(11)
DS
P_D
B(10)
DS
P_D
B(1)
DS
P_D
B(0)
DS
P_A
B(8)
DS
P_A
B(7)
DS
P_A
B(6)
DS
P_A
B(5)
DS
P_A
B(4)
DS
P_A
B(3)
DS
P_A
B(2)
DS
P_A
B(1)
DS
P_D
B(0:15)
DS
P_A
B(0:8)
DC
S_TX
_EN
G
SM
_TX_E
N
SE
RLE
S
ER
DA
T S
ER
CLK
TX_E
N
TX_B
AN
D_S
EL
DS
P_D
B(9)
DS
P_D
B(8)
DS
P_D
B(7)
DS
P_D
B(6)
DS
P_D
B(5)
DS
P_D
B(4)
DS
P_D
B(3)
DS
P_D
B(2)
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Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
7-9
7-5. Microphone Part
Is the assembled status ofmicrophone O.K?
Microphone does not work
C410 > 2.5V
Reassemble the microphone
Solder the microphone again or
Replace around Mic Circuit
(C403, C407, R407, R410.....)
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok ?
No
Check U300
Check the reference voltage on Mic path
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Flow Chart of Troubleshooting
7-10
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Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
7-11
7-6. Speaker Part
Is the terminal of SpeakerO.K.?
There is no sound from Speaker
No
Replace the Speaker
The pin#4of U402 is
Check U402
The pin#4of U402 isCheck U402
Are there anysignals
at the pin#5 and
END
Yes
YesNo
The type of soundfrom the Speaker is
Melody
YesNo No
No
Yes
YesYes
Are there anysignals
at the pin#2 and
No
Check U300
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Flow Chart of Troubleshooting
7-12
EA
RP
IEC
E
R41
0
C42
0
VC
CD
R41
4
R40
8 0
L402
R41
3
R40
7
C40
6
V40
5
R42
3
V40
4
R41
6
V40
3
R42
0
VC
CD
C40
9
R42
2
R41
1 2.
7K
C41
3
L401
C41
5
C40
0
R41
8
C41
8
R42
1
VC
CD
C40
4 C
403
R40
2
R41
9
1 V
+
R40
6
G 14
GN
D
6
4 IN
1
8 IN
2
NC
1 5
NC
2 7
2 N
O1
10 N
O2
U40
2
CO
M1
3
CO
M2
9
11
G
G 12
13
G
C41
1
2
1 3
5
4
VC
CD
U40
1
R40
5
C40
7
C42
1
R40
0
R41
5
C42
2
C41
0
C40
8
8 8 99
11
GG
12 1
3 GG
14
11 10
10
2 2 33
4 4 55
6 6 77
CN
400
C41
4
R42
5
VB
AT
R40
4
MIC
1
C40
1
V40
1
V40
2
C40
5
C41
9
R42
4
R40
3 V
CC
A R40
9
C41
2
R40
1
R41
2
C41
6
R41
7
L403
C40
2
C41
7
AO
UTB
P
RA
DIO
_SH
UTD
OW
N
SP
K_T
N
SP
K_T
P
EA
RS
PK
_R
EA
RS
PK
_L
SP
K_T
N
EA
R_S
WIT
CH
JAC
K_I
N
EA
R_A
DC
AO
UTB
N
AU
XO
UTP
AU
XIN
P
AU
XO
UTN
AU
XIN
N
R_A
NT
SP
K_T
P
MIC
OU
TN
MIC
INN
MIC
MIC
OU
TP
MIC
INP
MIC
+
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Flow Chart of Troubleshooting
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7-13
7-8. EGSM Reciever
F100 CHECKpin#9 ≥ -65dBm ?
CONTINUOUS RX ONRF INPUT : 62CHAMP : -50dBm
NORMAL CONDITIONcatch the channel?
U100 CHECKpin#31 : 26MHz ?Vp-p : 860mV?
F100 CHECKpin#11 ≥ -65dBm ?
U100 CHECKpin#21,22 ≥ -65dBm ?
Check soldered status ofC108, L111, L102
CN100resolder or change
F100, C127, L108resolder or change
C131,C132,L109resolder or change
U102 CHECKclean 3V?
CHECKU300
YES
NO
NO
NO
NO
NO NO
YES
YES
YES
YES
U102 CHECK26MHz ?
Vp-p : 950mV?
U102Resolder or
Change?
YES
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Flow Chart of Troubleshooting
7-14
7-9. EGSM transmitter
CONTINUS TX ON CONDITIONTX POWER DAC:500 CODE APPLIED
CH:62RBW : 100KHzVBW : 100KHzSPAN : 10MHz
REF LEV. : 10dBmATT. : 20dB
F100 pin#7 :about 2~3
dBm?
CN100, C105check&change
F100pin#4 : 3 V?
U300check & change
C106≒ 4~5dBm?
U101check & change
C109 : 3.7 V?
NO NO
YES
YES
YES
NO
NO
BATTERY, U100check & change
BetweenR101 &
U101 : 1.2V?
YES
NO
R101check &change
R102 :≒ -5dBm ?
YES
YES
U101change
U300check &
YES
NO
U100change orresolder
NO
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Flow Chart of Troubleshooting
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7-15
7-10. DCS Receiver
CONTINUOUS RX ONRF INPUT : 698CH
AMP : -50dBm
F100 CHECKpin#9 ≥ -65dBm ?
NORMAL CONDITIONcatch the channel?
U100 CHECKpin#31 : 26MHz ?Vp-p : 860mV?
F100 CHECKpin#1 ≥ -65dBm ?
U100 CHECKpin#19,20 ≥ -65dBm ?
Check soldered status ofC108, L111, L102
CN100resolder or change
F100, C130, L110resolder or change
C129, C128, L107resolder or change
U102 CHECKclean 3V?
CHECKU300
YES
NO
NO
NO
NO
NO NO
YES
YES
YES
YES
YES
U102 CHECK26MHz ?
Vp-p : 950mV?
U102Resolder or
Change?
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Flow Chart of Troubleshooting
7-16
7-11. DCS transmitter
CONTINUOUS TX ON CONDITIONCH : 698CH(DCS),660CH(PCS)
TX POWER CODE: 350 CODE APPLIED
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
U101change orresolder
F100 pin#5 :about 2~3
dBm?
CN100, C105check&change
F100pin#10 : 3 V?
U300check & change
L101:≒ 4~5dBm?
U101check & change
C109 : 3.7 V?
NO NO
YES
YES
YES
NO
NO
BATTERY, U100check & change
BetweenR101 & U101
: 1.2V?
YES
NOR101
check &change
NO
R100:≒ -5dBm ?
YES
YES
YES
U300check
NO
U100change orresolder
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Flow Chart of Troubleshooting
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7-17
7-12. PCS Receiver
CONTINUOUS RX ONRF INPUT : 698CH
AMP : -50dBm
F100 CHECKpin#9 ≥ -65dBm ?
NORMAL CONDITIONcatch the channel?
U100 CHECKpin#31 : 26MHz ?Vp-p : 860mV?
F100 CHECKpin#3 ≥ -65dBm ?
U100 CHECKpin#17,18 ≥ -65dBm ?
Check soldered status ofC108, L111, L102
CN100resolder or change
F100, C125, L106resolder or change
C126, C124, L105resolder or change
U102 CHECKclean 3V?
CHECKU300
YES
NO
NO
NO
NO
NO NO
YES
YES
YES
YES
YES
U102 CHECK26MHz ?
Vp-p : 950mV?
U102Resolder or
Change?
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Flow Chart of Troubleshooting
7-18
7-13. PCS transmitter
CONTINUOUS TX ON CONDITIONCH : 698CH(DCS),660CH(PCS)
TX POWER CODE: 350 CODE APPLIED
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
U101change orresolder
F100 pin#5 :about 2~3
dBm?
CN100, C105check&change
F100pin#10 : 3 V?
U300check & change
L101:≒ 4~5dBm?
U101check & change
C109 : 3.7 V?
NO NO
YES
YES
YES
NO
NO
BATTERY, U100check & change
BetweenR101 & U101
: 1.2V?
YES
NOR101
check &change
NO
R100:≒ -5dBm ?
YES
YES
YES
U300check
NO
U100change orresolder
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Flow Chart of Troubleshooting
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7-19
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Flow Chart of Troubleshooting
7-20
C106
C108
R102
C105
C137
C103
AN
T101 A
NT100
L101
R101
C117
TP103
C110
13
G
G 14
PC
S_R
X
3 10
VC
1
VC
2 4 2
VC
3
9
1 D
CS
_RX
DC
S|P
CS
TX
5
11 E
GS
M_R
X
EG
SM
_TX
7
G 86 G
12
G
F100
AN
T
L112
8 V
CC
2
VC
C2
18
VC
C_O
UT 13
VR
AM
P
6
12
11 G
G
9
G
19
G
17
7 GS
M_IN
G
SM
_OU
T 10
3 TX_E
N
VB
ATT
4 U101
2 BS
5 CE
XT
DC
S/P
CS
_IN
1 D
CS
/PC
S_O
UT
16
G 15
G 14
G
C109
C113
C111
C116
C104
C114
C107
C115
5 G
G
6
CN
100
2 A
C
3 G
1 G
4
VB
AT
R100
0
L102
L103
3.9nH
C112
EG
SM
RX
PC
S_R
X_E
N
DC
S_TX
_EN
GS
M_TX
_EN
P
CS
RX
DC
SR
X
TXP
OW
ER
GS
M_P
AM
_IN
DC
S_P
AM
_IN
TX_E
N
TX_B
AN
D_S
EL
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Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
7-21
(MU
RA
TA
)
(MU
RA
TA
)
GS
M
(MU
RA
TA
)
DC
S
C126
2
G
G
5
IN
1 3
OU
T
OU
T
4
R103
F101
C124
R105
C122
IN
6 O
UT
O
UT
7
OU
T
8 O
UT
9
0 R
107
F102
2
G
G 3
5
G
G 10
IN 1 4
C121
C129
VR
F
C135
U102
2
4 3
1
R106
C127
L108
L110
C128
L107
L109
C120
R104
C131
C125
C130
C133
L105
L106
VC
CD
C136
C134
VR
F
C123
9 _PDN
10
_RESET
_SE
N
2
VDD 29
11
VIO
XDIV 26 32
XEN
XMODE 25
8 X
OU
T
31
XTAL1
30
XTAL2
RF
IPP
17
16
RFOH
RFOL
15
SC
LK
1
SD
IO
3
VDD 12
VDD 13
28
VDD
35
NC
RF
IAN
24
RF
IAP
23
20 R
FID
N
RF
IDP
19
RF
IEN
22
RF
IEP
21
18 R
FIP
N
27
AFC
BIN
6 7
BIP
4 B
QN
5 B
QP
14
GND
GND 33 34
NC
U100
C132
13MH
Z_B
B
CL
K13M
_YM
U
XO
EN
A
DC
S_P
AM
_IN
GS
M_P
AM
_IN
SE
RD
AT
PC
SR
X
AF
C
RF
_EN
13MH
Z_B
B
RT
X_Q
P
RT
X_Q
N
RT
X_IP
RT
X_IN
DC
SR
X
EG
SM
RX
SE
RL
E
SE
RC
LK
CL
K13M
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CL
K13M
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Flow Chart of Troubleshooting
7-22
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