Samsung SGH-L320 TSHOO
10. Flow Chart of Troubleshooting
10-1.
10-1-1.
Baseband
Power ON
Power On' does not work
'
Yes
Check the current
consumption more
than
Check the VBAT
more than
VCCD_1.2V_A
ofUCD300 is more
100
Yes
Yes
Check the
than
1.2V
mA
3.3V
No
No
No
Download again
Charge the Battery
①
CheckUCD300 and
C336
Yes
Check VCCD_1
ofUCD300
VCCD_
ofUCD300
Check VRF_2
UCD300
VSYN_2.8V of
UCD300=2.8V
Check OSC100 pin#1
or pin#3 Freq
Vp-p
Check the initial operation
=1.8
2.9V
=2.9V
Yes
.9V
=2.9V,
Yes
=26
>0.8V
Yes
Yes
.8V
V,
of
MHz,
②
No
CheckUCD300 and C340,C341
③
No
CheckUCD300
and C311,C312,C310,C313
④
No
Check the clock generation
circuit(OSC100
)
END
10-1
Flow Chart of Troubleshooting and Circuit Diagrams
RAREF3
G
N
D
S
R212
R209
R213
R211
R210
C204
C223
C206
C207
C208
C212
C211
R207
C
2
2
0
R
4
1
TA402
9
R
4
2
0
TA405
C317
TH300
R309
①
R310
C324
C325
C323
C308
C306
C305
C307
C328
C329
U402
SC104
SC115
C
3
2
OSC300
6
②③
R
4
2
1
C401
R406
U
C
D
3
0
0
C
C
3
3
3
3
8
9
TA407
TA403
U100
C
3
2
7
C
3
3
7
C
3
C
1
3
1
1
4
C
C335
3
0
C334
9
C
C
3
3
3
3
1
6
SC114
SC107
C
C
3
3
1
1
2
3
C310
C340
C341
C508
R108
C
3
1
5
L300
U
3
0
4
R308
O
S
C
1
0
0
R102
C117
C121
C
C
5
5
0
0
5
9
C
3
3
2
L
C
3
3
0
3
2
3
C
3
S
3
C
0
1
1
3
R
3
0
7
R
3
0
6
④
S
_
A
A
_
E
V
R
.2
O
C
_
O
D
L
V
C335 C341C336 C337
V
1
8
.
_
1
D
_
C
T
B
C
V
V
D7
LED1_DRV
C7
LED2_DRV
D9
LED3_DRV
N2
RXTXDATA
R2
RXTXEN
J4
RXTXIN
J3
RXTXIP
K3
RXTXQN
V
.8
V
2
8
.
_
2
A
_
C
D
C
S
V
V
C339C338
8
9
.
.
1
2
_
_
D
D
C
C
C
C
V
V
C340C334
V
V
K4
RXTXQP
H5
TXP
L5
TXPSTB
P13
USB_CARKIT_D_N
P12
USB_CARKIT_D_P
C10
USB_CHRG
A6
VLDO_1
D6
VLDO_2
E14
VLDO_AUD
F12
VLDO_AUX1
D14
VLDO_AUX2
C15
VLDO_COREA
B15
VLDO_COREA_S
C12
VLDO_COREB
D13
VLDO_COREC
S
B
D
D
D
S
S
S
N
N
S
S
S
G
V
V
V
G
1
1
9
8
6
4
1
F
K
K
K
K
N
S
S
S
S
S
Q
D
D
D
N
N
N
G
G
G
0
7
6
1
F
F
E
S
S
D
D
D
D
D
D
N
N
N
N
N
N
G
G
G
G
G
G
0
1
6
7
9
8
1
1
F
F
G
G
F
F
10-2
Flow Chart of Troubleshooting and Circuit Diagrams
SIM_CLK
SIM_IO
SIM_RST
UP_CLK
UP_IO
UP_RST
VRFLDO_1
VRFLDO_2
VREF
CNTL_DAT_CSP
CNTL_EN_CSP
HV_CHRG
AINT
BATKELV
CREF
DINT
FBSW
AFC
B6
E6
B5
N5
L6
M6
E3
F3
F2
P1
N9
D10
G5
N7
B11
F1
L9
B12
B13
LX
D3
SIM_CLK
SIM_IO
SIM_RST
SIM1_CLK
SIM_DATA
SIM1_RST
CNTL_DAT_CSP
CNTL_EN_CSP
C313
C312
VRF_2.9VVSYN_2.8V
C311C310
10-3
Flow Chart of Troubleshooting and Circuit Diagrams
10-1-2.
Initial
Initial Failure
Yes
Check VCCD_1.2V_A=1.2V,
VCCD_1.8V=1.8V,
VCCD_2.9V=2.9V of
UCD300
Yes
Check the RST of
CD300 is
U
Low→High"
"
Yes
LCD display is O.K?
Yes
Sound is O.K?
No
No
No
No
Check UCD300
Check RST testpoint ofUCD300
①
Check HDC
Check audio part
and LCD part
600
DOWN
CLR
2
TCK
RST
GND1
END
TRST_N
TDOTMS
TDI
RTCK
1.8V
Yes
PWR
3
C615
C614
C613
C612
C611
C610
C609
C608
C607
C636
C606
C605
C604
①
HDC600
FLM
L30 1
C30 3
C601
C602
C617
C618
C619
C620
C621
C622
C623
C624
C625
C626
C627
C628
C629
C630
C631
C632
C633
C634
C635
G10 2
C
3
0
4
R
3
0
T
5
A
C
_
U
P
V
V
R
R
6
6
0
0
5
4
10-4
Flow Chart of Troubleshooting and Circuit Diagrams
AMP_EN
AUDIO_SEL
CAMPWR_EN
PCLK
LCD_ID
CAM_D(0)
CAM_D(1)
CAM_D(2)
CAM_D(3)
CAM_D(4)
CAM_D(5)
CAM_D(6)
CAM_D(7)
CAM_RST
HSYNC
VSYNC
MOTOR_EN
CAM_SCL
CAM_SDA
MCLK
VCCD_2.9V VBAT
HDC600
11
33
7788
10
99
11
12
11 12
13
14
13 14
15
16
15 16
17
18
17 18
19
20
19
21
22
21 22
23
24
23 24
252626
25
27
28
27 28
29
30
29
31
32
31 32
33
34
33 34
35
36
35 36
37
38
37 38
39
40
39
41 42
41
43 44
43
46
45
45
47 48
47
495550
49
51
52
51 52
54
53
53
5
6
7
5
5
5
5
6
7
8
5
5
5
5
14-5802-054-202-829
VCCD_2.9V VBAT
C614 C610
NC
22
44
66
10
20
30
40
42
44
46
48
50
54
8
5
NC
C611
C612C615
NC 33PF
NC
C609C613
NC
NCNC
C607
NC
NC
C636
33PF
C606
C605
33PF
C604C608
33PF
C603
NC
HDC600
11
33
7788
10
99
11
12
11 12
13
14
13 14
15
16
15 16
17
18
17 18
19
20
19
21
22
21 22
23
24
23 24
252626
25
27
28
27 28
29
30
29
31
32
31 32
33
34
33 34
35
36
35 36
37
38
37 38
39
40
39
41 42
41
43 44
43
45
46
45
47 48
47
495550
49
51
52
51 52
53
54
53
8
7
6
5
5
5
5
5
8
7
6
5
5
5
5
5
14-5802-054-202-829
HI_MONO_OUT_N
HI_MONO_OUT_P
LCD_BL_EN
LCD_WEN
LCD_RS
LCD_CS
VOLED_EN
LCD_D(0)
LCD_D(1)
LCD_D(2)
LCD_D(3)
LCD_D(4)
LCD_D(5)
LCD_D(6)
LCD_D(7)
LCD_D(8)
LCD_D(9)
LCD_D(10)
LCD_D(11)
LCD_D(12)
LCD_D(13)
LCD_D(14)
LCD_D(15)
SLCD_CS
FLM
22
44
66
10
20
30
40
42
44
46
48
50
54
C633
C634
C635
47PF 47PF
C632 C628
47PF
C631
47PF47PF
C630
C629
47PF
47PF
C627
47PF
47PF 47PF
10-5
47PF
C624C626 C623
C621
C620C625
47PF
47PF
47PF 47PF
C619
47PF47PF
C618
47PF
0.01NF
C601
C602
716C226C
33PF
33PF
Flow Chart of Troubleshooting and Circuit Diagrams
10-1-3.
Insert SIM" is displayed on the LCD
"
Sim Part
Yes
Check the contact of
SIM301 after removing
SIM CARD.
Is there any damage?
No
Is there any Signals
pin#1
1, #13, #15, #16
of SIM
301?
Yes
Check the SIM Card
Yes
END
Yes
No
①
Replace the SIM301
②
Check the UCD300
R212
R209
TH300
R213
R211
R309
R210
C204
R310
C223
C324
C325
C206
C323
C207
C308
C208
C212
C211
R207
C307
C
2
2
0
C328
C329
TA402
TA405
SC104
SC115
C317
C306
C305
C
3
2
OSC300
6
②
U402
R
4
2
1
C401
R406
U
C
D
3
0
0
C
C
3
3
3
3
9
8
TA407
TA403
C
3
2
7
C
3
3
7
C
3
C
1
3
1
1
4
C
C335
3
0
C334
9
C
C
3
3
3
3
1
6
SC114
SC107
C
3
1
2
C310
C340
C341
C
3
1
3
C
3
1
5
U
3
0
4
C
C508
5
0
9
R108
C
3
3
3
C
3
3
0
L300
R308
T
A
6
G103
C
5
0
5
C
3
3
2
L
3
0
2
S
C
1
1
3
R
3
0
7
R
3
0
6
①
C321
3
7
ZD604
C638C639
C640
#11
C
C
C
3
3
3
1
1
2
9
8
2
C
3
2
0
VR603
BTC601
#1
SIM301
#10
#16
SC106
10-6
Flow Chart of Troubleshooting and Circuit Diagrams
10-1-4.
Charging Part
Abnormal charging part
Yes
The pin
The pin#2of
The pin#4of U304 is
The pin#8of
VEXT
#19,#20
IFC
501
_5V뵃5
high"?
"
high"?
"
3.2~4.2
Yes
Yes
is
Yes
V?
V?
U304
U303
①
of
No
Replace TA, Check IFC
501
②
is
No
Check the
U304
③
No
Check the
U304
④
is
No
Check the
U303
①
IFC501
ZD503
The pin#4of
Low?
END
R509
R505
S
R508
C
R507
1
C512
1
VR500
6
R506
VR501
L501
L502
C514
R512
ZD504
R510
C
R
4
4
1
ZD402
0
1
8
Yes
U303
Yes
C510
Z
D
5
0
2
Z
D
5
0
1
C513
R418
L
4
0
2
L
5
0
R
4
0
1
5
C
4
C426
0
9
C410
is
SC109
R
2
0
8
R
2
0
6
U200
C
2
1
9
C217
R413R414
U401
R
R
4
4
1
1
L400
6
7
C427
C
R
4
4
C424
2
0
5
7
C406
R
2
0
5
C
4
2
1
C
4
0
8
R203
L401
C422
C418
C420
C423
R
4
0
2
⑤
No
C
2
1
8
R
4
0
3
Check the R304
& U303
10-7
Flow Chart of Troubleshooting and Circuit Diagrams
RADIO_ANT
EAR_MIC+
EAR_MIC-
EAR_R
EAR_COMN
EAR_L
EAR_SW
EAR_JACK_IN
SDS_TXD
SDS_RXD
JIG_ON_IF
USB_D+
USB_D-
VEXT_5V
VEXT_5V
CHG_DET
CHG_OFF
C513
C302
L501
L502
R510
R512
C514
VCCD_1.8V
R301
R304
R505
R506
R507
R508
R509
C511
L500
VBAT
4
0
5
D
Z
IFC501
1
1
2
2
3
3
4
4
5
5
6
6
7
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
21
22
22
23
23
24
24
25
25
26
26
SDS_TXD_J
SDS_RXD_J
JIG_ON_J
VBAT
C512
ZD501
1
6
5
2
34
VCCD_1.8V
USB_5V
ZD502
6
1
5
2
4
3
ZD503
C510
VR500
VR501
VBAT
U303
1
VIN
_PPR
2
3
_CHG
4
_EN
8
BAT
IREF
7
6
IMIN
5
GND
GND
9
R303
C301
ICHRG
JIG_ON
R302
U304
5
1
B
VCC
4
Y
2
A
GND
3
R306
R308R307
JIG_ON_IF
VEXT_5V
R
3
C302
④
⑤
U
3
0
3
R302
0
1
R
3
0
4
R303
TA413
C414
C301
S
C
1
0
5
10-8
②
③
U
3
0
4
R308
R
3
0
7
R
3
0
6
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