Samsung SGH-X670 Schematics Troubleshooting 9
7. Flow Chart of Troubleshooting
7-1. Power On
' Power On ' does not work
Yes
Check the Battery Voltage
is more than 3.4V
Yes
C408(VINT) = 2.7V?
Yes
Check the Clock at
R402=32KHZ
Yes
C425(+VDD_IO_LOW) &
C424(+VDD_IO_HIGH) = "H"?
Yes
No
Change the Battery
No
Check the PMU related to VINT
No
Resolder OSC400
No
Check the related circuit
C401(+VDD_GSM_CORE)
=1.8V?
Yes
Check for the clock at C312
= 26MHz
Yes
Check the initial operation
Yes
END
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
No
No
7-1
Check the +VDD_GSM_CORE circuit
Check the clock generation circuit
(related to U100)
FlowChartofTroubleshooting
ONKEYN
C405
OSC400
C411
Typical 3.7V
+VDD_RX_TX
+VCC_SYN
+VDD_IMAGE
+AVDD_HFA
+VDD_IO_HIGH
+VDD_IO_LOW
R402
C407
VBAT
+AVDD
V400
R404
C410
C412
C414
C415
C416
C422
C424
C425
C406
C408
R401
POS
BAT400
NEG
29
30
27
31
26
25
I
O
C
C
S
S
O
O
24
RF2VDD
23
RF12VBAT
22
RF1VDD
21
D1VDD
20
LPD1VBAT
19
LPVDD
18
HCVBAT
17
HCVDD
16
D2VDD
15
IOD2VBAT
14
IOVDD
13
_REC2
S
A
I
B
C
I
M
12
C423
32
28
Y
C
E
F
E
K
R
N
O
_
C
H
T
Q
S
R
I
R
_
_
10
11
34
33
36
35
X
T
V
T
T
E
D
G
A
A
R
A
V
N
I
V
C
H
O
I
M
I
S
9
D
H
A
S
V
U400
8
B
M
D
B
V
C
V
V
C
C
1
H
H
S
N
K
E
R
C
R
M
I
M
I
W
S
_
S
P
7
6
SCP
T
V
P
G
P
A
C
H
C
B
C
/
SCN
R
U
C
G
D3VDD
H
C
SIMD3VBAT
SIMVCC
SIMIOCD
SIMCKCD
_SIMRSCD
SIMEN
GPO3
GPO2
GPO1
GND
GND
GND
2
K
GND
N
1
2
E
3
C
NC
R
L
A
K
E
L
C
D
W
R
NC
_
S
S
P
C
1
2
3
5
4
BU_RST
C409
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
C413
R405
V401
TP400
+VDD_SLEEP
+VDD_IO_LOW
SIM_VCC
SIM400
SIM_IO
1
SIM_CLK
SIM_RST
C417
C419
C418
C421
C420
6
2
5
3
4
G78G
G
G
910
AUX_ON
SCL
SDA
32KHz_DIGIT
PON_TX
REF_ON
SIMRST
SIMCLK
MIC_BIAS
R406
RSTON
IT_PMU
SIMIO
26M_CLK
C312
+VDD_IO_HIGH
R313
R315
+VDD_IO_HIGH
U302
1
5
NC
VCC
2
INA
4
3
OUTY
GND
R314
26M_DIGIT
7-2
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
7-2. Initial
FlowChartofTroubleshooting
Initial Failure
Yes
Q300 pin 4 (RSTON) ="H"
Yes
Is UCP200 R214, R215
OK?
Yes
Check the 16bit data signal
&memoryCE
Yes
END
No
Check the circuit related to reset
No
Check the UCP200
7-3
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
FlowChartofTroubleshooting
R13
RFSIG0
M12
RFSIG1
M11
RFSIG2
V5
GPIOA3
P9
GPIOA4
L11
GPIOA5
R11
RFSIG6
P11
RFSIG7
T2
GPIOA21
R2
GPIOA22
R5
GPIOA23
U18
RFCLK1
R17
RFDO1
G1
GPIOA9
V18
RFEN0
H1
RESET
V10
MCLK
R9
AUXDAC1
R8
AUXDAC2
V11
UCP200
AUXDAC3
MICBIAS
AUXADC1
AUXADC2
AUXADC3
AUXADC4
AUXADC5
AUXMICN
AUXMICP
GPIOA24
GPIOA25
GPIOA26
GPIOA30
GPIOA27
GPIOA28
SIMCLK
SIMIO
SIMPWR
SIMRST
GPIOA17
GPIOA29
GPIOA31
USBCN
USBDM
USBDP
VREF
HFR1
HFR2
EAR1
EAR2
MICN
MICP
ANL
ANR
FSC
DCL
SDA
SCL
C217
U14
V12
V8
QN
V7
QP
U8
IN
U7
IP
J1
K1
K2
L1
L2
J17
H18
K15
J15
M18
N18
L17
M17
K18
L18
D13
E11
B13
DD
B14
DU
N1
T1
L9
U17
M14
P8
P6
R6
G17
D15
N14
F17
V2
V3
V4
F14
G14
H11
R207
R208
MODE_SELECT
PON_SW
PON_PA
BT_INT
PON_TX
PON_3587_SYNTH
EXT2
DCS
RF_CLK
RF_DATA
RF_EN
RSTEXTn
EDGE1_PA
AFC
RAMP
MIC_BIAS_BB
RX_TX_QN
RX_TX_QP
RX_TX_IN
RX_TX_IP
MES_BATT
VF
TEMP_PRODUCT
EAR_ADC
HFR_P
HFR_N
EAR1
EAR2
MIC_N
MIC_P
C222
C223
FSC
+VDD_IO_LOW
DCL
R213
DD
DU
R_CONTROL
MELODY_SEL
JACK_EN
AUX_ON
END_OF_CHG
AUDIO_SW
SIMCLK
SIMIO
SIMRST
EXT1
CHG_ON
USBCN
USBDM
USBDP
R205
USB Interface
CLKBURST
ANL
ANR
DAI & Bluetooth data Interface
R203
100K
IT_PMU
M_INT
KEY_LED_ON
D_REF_CLK
+VDD_IO_HIGH
R215
R214
SCL
SDA
LCD_RESET
S_RST
+VDD_IO_HIGH
R309
+VDD_IO_LOW
+VDD_IO_LOW
Q300
3
2
1
4
5
6
+VDD_IMAGE
R307
RSTON
S_RST_IMAGE
LEVEL SHIFT
7-4
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
FlowChartofTroubleshooting
7-5
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
FlowChartofTroubleshooting
7-3. Charging Part
Abnormal charging part
Yes
Check the U502 pin 1
>4.9V
Yes
U502 pin 5 = "L"?
Yes
U502 pin 3 = "L"?
Yes
Check the U502 pin 10
≒4.2V
No
No
No
No
Check the circuit related to
V_EXT_CHARGE
Resolder or replace U502
Check the circuit related to
AUX_ON signal
Resolder or replace U502
Yes
END
7-6
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
V_EXT_CHARGE
5.0V
+VBUS
AUX_ON
CHG_ON
C504
C503 ZD501
+VDD_IO_HIGH
R511
C506
FlowChartofTroubleshooting
Typical 3.7V
VBAT
R510
U502
1
CRDL
2
USB
3
_PPR
4
_CHG
5
_EN
10
BAT
9
ICDL
8
GND
7
USBON
6
IMIN
GND
11
R515
ZD500
R512
R514
C505
Typical 1.4V
MES_BATT
USB_CHG_ONEND_OF_CHG
BATTERY CHARGING
7-7
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
FlowChartofTroubleshooting
7-4. Sim Part
Phone can't access SIM Card
SIM400 pin 1,5 = "H"?
Yes
No
Check the sim charge pump
Yes
After Power ON,
Check SIMCLK Signal on
pin3 of SIM400 in a few
Yes
After SIM card insert,
SIM400 pin 2 = "H(SIM_RST)"?
Yes
Check the SIM Card
Yes
END
No
Check the Clock
No
Replace PBA
7-8
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
FlowChartofTroubleshooting
C406
C408
R401
POS
BAT400
NEG
29
30
31
28
C
F
E
R
32
34
33
36
T
T
E
A
N
V
I
B
A
V
V
S
V
U400
C
H
K
C
M
I
S
7
8
35
T
X
V
D
G
H
C
V
C
H
S
R
M
I
S
_
6
A
A
R
D
D
V
M
P
T
G
C
A
H
B
C
/
R
U
C
G
H
C
1
2
K
N
N
2
E
E
3
R
R
K
L
W
W
P
P
C
3
5
4
37
B
SCP
V
P
C
38
SCN
39
D3VDD
40
SIMD3VBAT
41
SIMVCC
42
SIMIOCD
43
SIMCKCD
44
_SIMRSCD
45
SIMEN
46
GPO3
47
GPO2
48
GPO1
49
GND
50
GND
51
GND
52
GND
1
53
C
NC
L
A
E
54
C
D
R
NC
_
S
S
1
2
BU_RST
C409
+VDD_SLEEP
C413
TP400
R405
V401
C421
+VDD_IO_LOW
C418 C420
C419
SIM_VCC
SIM_IO
SIM_CLK
SIM_RST
C417
SIM400
1
6
2
5
3
4
G
G
G78G
910
AUX_ON
SCL
SDA
32KHz_DIGIT
PON_TX
REF_ON
SIMRST
SIMCLK
7-9
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
FlowChartofTroubleshooting
7-5. Microphone Part
Microphone does not work
Yes
Check the connection
from MIC
Yes
Check the circuit
from UCP200 to MIC
Yes
Check R605, R625
='H'?
Yes
Check the MIC
No
No
No
No
Resolder MIC
Resolder the C603, C606, R601, R603, R604
L600, L601, U600
Check the JACK_IN, JACK_EN signal
Replace the MIC
Yes
END
7-10
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
MICROPHONE
MIC600
D602
D603
C607
C605
C601
JACK_EN
R605
R606
MIC_BIAS
0
1
NO2
9
COM2
8
IN2
1
2
C
C
V
D
N
C
N
G
6
7
Close to microphone
U600
1
O
N
3
COM1
4
IN1
5
NC1
L600
L601
Close to MCP
C600
FlowChartofTroubleshooting
MIC_BIAS_BB
MIC_BIAS
R600
R601
R603
R604
C603
C606
R602
C602
MIC_P
C604
MIC_N
C608
EARPIECE
EAR600
11
22
33
44
55
66
15
77
G
16
88
G
17
99
G
18 10
10
G
G
G
1112GG1314
R607
R625
D601
+VDD_IO_HIGH
R611
R612
C616
R_ANT
L606
L607
L608
6
123
45
ZD601
D600
Typical 3.7V
VBAT
P
P
_
_
P
K
R
M
F
P
S
A
A
L603
C615
C611
C612
C617
EARSPK_L
HFR_N
EARSPK_R
EAR_SWITCH
JACK_IN
EAR_ADC
7-11
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Loading...