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Flow Chart of Troubleshooting
9-2
Power On
reference
PLL
INTERFACE
REFERENCE
SENSOR
MONITOR
SUPPLY &
SIM
o
vd
d
MODULE
D
V
D
D
4
CONTROL
clocks
CHARGE
G
E
N
E
R
A
T
O
R
VBAT
GENERATOR
bias currents
ON/OFF
HIGH VOLTAGE
LINREG)
REAL-TIME
A
V
D
D
VOLTAGE
SUPPLY
OSCILLATOR
CHARGE
calibration
D
V
D
D
1
H
F
A
CLOCK
h
tm
p
D
V
D
D
2
htmp
internal
SWITCH
INTERNAL
&
D
V
D
D
3
internal
data
MIC BIAS
BATTERY
voltage
SIM
12C
IN
T
E
R
R
U
P
T
INTERFACE
control
status
32KHz XTAL
supply
CONTROL
CLOCK
SUPPLY
CONTROL
PUMP+
BACKLIGHT
V
IB
ON-CHIP
refgnd
POWER MANAGERMENT UNIT(PMU IC)
(CHARGE
TEMP HIGH
PUMP
LINREG
VCC_RF_VCO
VCC_RX_TX
VCC_TX_BURST
C300
3
34
4
5
5
6
6
G
7
8
G
G
9
10
G
C314
CN300
1
1
22
R305
C352
VDD3
VDD1
C310
BLVDD
C304
X300
2
1
C333
VDD_KEY
C301
AVDD_TEMP
C309
C312
R302
C327
C326
C321
C325
V_ISUP
C331
C319
AVDD
VBAT
C323
BAT300
VBAT
C318
VBAT
C311
C338
C332
L301
VIBVDD
MIC_BIAS
C322
C316
VCC_CP
C324
VBAT
C303
V_ISUP
C317
K5
V
S
S
7
V
S
S
8
F6 G6
V
S
S
9
C315
D5
V
S
S
1
9
V
S
S
2
F5
V
S
S
2
0
D4 C4
V
S
S
2
1
V
S
S
3
F4
V
S
S
4
G4
V
S
S
5
J3
V
S
S
6
G5
G8
V
S
S
1
1
V
S
S
1
2
F7E6
V
S
S
1
3
V
S
S
1
4
E7D7
V
S
S
1
5
V
S
S
1
6
C7 D6
V
S
S
1
7
V
S
S
1
8
E5
J5
VBACK
VBAT
K4
VCC C2
B3
V
IB
V
B
A
T
V
IB
V
D
D
A3
V
P
R
O
G
H7
V
S
S
1
E4
V
S
S
1
0
G7
C6
S
IM
G
N
D
A2
B8
SIMIO
S
IM
S
C
N
A1
S
IM
S
C
P
B1
S
IM
V
B
A
T
B2
D10
S
L
P
M
O
D
TM
H5
RF2VDDS
J10
RFVBAT
G9
C1
RST
D9
R
S
T
O
SCL
E3
SDA
F2
E9
S
E
L
1
2
R
B
S
E
L
3
R
B
H4
SIMCLK
REFGND
K6
RF1SNS
F10
E8
RF1SWS
RF1VDD
G10
RF1VDDS
F9
RF2SNS
H9
E10
RF2SWS
RF2VDD
H10
2
H3
O
N
K
E
Y
K8
OSC32I
K9
OSC32O
R
E
C
1
K1
R
E
C
2
J2
R
E
C
3
K2
REFC
H8
HVSVBAT C8
HVSVDD D8
C10
IN
T
IO
D2
ISUPA
H6
ISUPD
J4
J6
MICBIAS
NC 1
NC
A5 B5
H
F
A
V
B
A
T
A6
H
F
A
V
D
D
H
F
A
V
D
D
B6
HVSGND
B9
HVSOC
B10
A10
HVSSCN
HVSSCP
C9
G1
D
V
D
D
2
D
V
D
D
2
V
B
A
T
G3
D
V
D
D
3
H1J1
D
V
D
D
3
D
V
D
D
3
V
B
A
T
H2
D
V
D
D
4
A4
F8
D
V
D
D
4
O
N
D
V
D
D
4
V
B
A
T
B4
H
F
A
V
B
A
T
E2
CHRVBAT
D3
CLK
C3
C
L
K
3
2
A9
CPRES
D1
D
V
D
D
1
F1 F3
D
V
D
D
1
V
B
A
T
D
V
D
D
2
G2
A
V
D
D
S
K10
A
V
D
D
V
B
A
T
J8 J9
A
V
D
D
V
B
A
T
BBMGND
A8
BBMSW
C5
BLVBAT
B7
BLVDD
A7
CHRIV E1
CHRREG
U305
K3
A
U
X
O
N
J7
A
V
D
D
A
V
D
D
K7
C339
VDD1
C336
C328
C335
C302
VCC_SYN
TP300
VDD2
R312
C334
C320
VBAT
C313
VBAT
C337
VDD_KEY_ON
SIMIO
SIMCLK
CHARGER_OK
32K
IT_PMU
ONKEY_N
RECO1
JACK_IN
JIG_REC
RSTON
REF_ON
BACKLIGHT
BLVDD
PON_TX
PON_SYNT
SCL
SDA
Summary of Contents for SGH-X656
Page 41: ...8 PCB Diagrams 8 1 ...
Page 42: ...PCB Diagrams 8 2 ...