Samsung SGH-E335 Schematics
7. Flow Chart of Troubleshooting
1. Power On
' Power On ' does not work
Yes
Check the Battery Voltage
is more than 3.4V
Yes
C414(V_ISUP) = 2.7V? Check the PMU related to V_ISUP
Yes
Check the Clock at
R401=32KHZ
Yes
C431 (VDD1) = "H"? Check the VDD1 circuit
Yes
C430(VDD2) & C429(VDD3)
= 2.8V?
No
Change the Battery
No
No
Resolder X400
No
No
Check the VDD2,VDD3 circuit
Yes
Check for the clock at C126
= 13MHz
Yes
Check the initial operation
Yes
END
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No
7-1
Check the clock generation circuit
(related to U100)
Flow Chart of Troubleshooting
Power On
VCC_RF_VCO
VCC_RX_BURST
VDD2
VDD1
MIC_BIAS
VCC_RX_TX
SIGNAL
BL_VDD
V_ISUP
VCC_SYN
2V85
1V35
2V35
VCC_CP
SIMVDD
5V
3V
4V
3V25
2V7
2V7
VDD_KEY
VDD_AMP
2V95
3V05
2V1
2V7
2V7
2V7
TYP
VDD_VIB
SIGNAL
AVDD_TEMP
VDD3
AVDD
3V05
2V65
2V65
C428
C429
C430
C431
VDD_VIB
VDD3
VDD2
VIB
2V85
TYP
V_ISUP
C425
C427
C426
Baseband power supply
RF power supply
VDD1
VPROG
H7
VSS1
E4
VSS2
VSS3
VSS4
G4
VSS5
J3
VSS6
G5
VSS7
K5 F6
VSS8
VSS9
G6
VSS10
G7
VSS11
G8 F7
VSS12
VSS13
E6 E7
VSS14
VSS15
D7 C7
VSS16
VSS17
D6 E5
VSS18
VSS19
D5 F5
VSS20
D4
VBAT
VSS21
C4 F4
DVDD1
F1
DVDD1VBAT
F3
SEL12RB
E9
DVDD2VBAT
DVDD2
G2
DVDD2
G1 G3
SEL3RB
H4
DVDD3VBAT
DVDD3
H1
DVDD3
J1 H2
DVDD4ON
F8
DVDD4VBAT
B4
DVDD4
A4
AVDDVBAT
J8
AVDDVBAT
J9
AVDD
J7 K7
AVDD
AVDDS
K10
HFAVBAT
A5
HFAVBAT
B5
HFAVDD
A6 B6
HFAVDD
VIBVBAT
B3 A3
VIBVDD
VDD_KEY
SPVDD
AVDD_TEMP
AVDD
VCC_TX_BURST
VCC_RFVCO
PON_SYNTH
VCC_RX_TX
VCC_SYNTH
PON_TX
C424
C421
C422
J10
E10
RF2VDDS
RF2SWS
DVDD1
DVDD2
DVDD3
DVDD4
LINREG)
PUMP+
AVDD
HFA
VIB
HVSVDD
NC
NC
2
D8
1
C420
B10 HVSOC
C417
C419
R403
G9
F10
E8
G10
F9
H10
H9
RFVBAT
RF1SNS
RF1SWS
RF1VDD
RF1VDDS
RF2SNS
RF2VDD
SWITCH
LINREG
HIGH VOLTAGE
(CHARGE
SUPPLY
HVSSCP
C8 HVSVBAT
B9 HVSGND
A10 HVSSCN
C9
C418
RF power supply
VBAT
VCC_CP
BACKLIGHT
VBAT
C416
R402
C415
C414
C412
VBAT
J5
A8 BBMGND
C5 BBMSW
CONTROL
K4 VBAT
B7 BLVBAT
A7
H6 ISUPA
J4
VBACK
ISUPD
BLVDD
BACKLIGHT
SUPPLY &
INTERNAL
MODULE
SUPPLY
supply
internal
CLOCK
VBAT
CONTROL
VOLTAGE
BATTERY
MONITOR
CHARGE
CHRIV
E2 CHRREG
D3 CHRVBAT
E1
VBAT
10M
1
C413
MIC_BIAS
C409
C407
C406
BLVDD
C408
V_ISUP
BAT400
SDA
SCL
VBAT
J6 MICBIAS
TEMP HIGH
SENSOR
calibration
htmp
clocks
GENERATOR
REAL-TIME
PLL
OSCILLATOR
32KHz XTAL
OSC32O
OSC32I
K8
K9
R401
2
X400
C411
E3 SCL
F2
K6 REFGND
H8
SDA
REFC
U400
refgnd
REFERENCE
INTERFACE
MIC BIAS
ON-CHIP
12C
&
control
status
data
reference
voltage
bias currents
internal
CLOCK
TP402
TP401
SIMIO
SIMCLK
CLK32
ovdd
htmp
CONTROL
ON/OFF
INTERRUPT
GENERATOR
INTERFACE
CHARGE
PUMP
SIM
SIM
SIMCLK
CPRES
SIMIO
VCC
CLK
RST
IO
C6
C2
B8
C1
D2
C3
D1
SIM_IO
C402
C403
C404
C405
32K
1 2 3
10
G G
8 9
G G
7
6
4
5
SLPMOD
AUXON
ONKEY
RSTO
REC2
REC1
REC3
SIMVBAT
SIMGND
SIMSCP
SIMSCN
SIM_RST
SIM_CLK
CN400
CHARGER_OK
ONKEY_N
JIG_REC
JACK_IN
REF_ON
IT_PMU
RSTON
RECO1
32K
TP400
R400
VDD1
PMU (IC)
TM
H5
D10
K3
H3
D9
A9
J2
K1
K2
INT
C10
B2
A2
B1
A1
VBAT
C400
SIM_VCC
Baseband power supply
SIM
7-2
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Flow Chart of Troubleshooting
7-3
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Flow Chart of Troubleshooting
2. Initial
Initial Failure
Yes
R200 (RSTON) ="H"?
Yes
Is U304 pin 4,6
(memory CE) OK?
Yes
Check the circuit around
LCD & U304 (Short or not solder)
Yes
END
No
Check the circuit related to reset
No
Check the U304
7-4
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Initial
Flow Chart of Troubleshooting
C212
C211
VDD3
C210
U705
C208
VDD2
ANTSW_ON
GSM_TXVCO_EN
DCS_TXVCO_EN
RI_BLUE
PAM_TXEN
REF_ON
RF_BBI_CLK
RF_BBI_DATA
PON_RX
PCS_RX
PON_TX
PON_SYNTH
RF_EN_SYNTH
TP4
R202
AVDD_TEMP
MES_BATT
AFC
RAMP
QRX_TX_P
QRX_TX_N
IRX_TX_P
IRX_TX_N
TH200
R204
AVDD_TEMP
VF
EARP_P
VDD1
R209
AUX_MIC_N
D_REF_13M
MIC_P
MIC_N
AUX_MIC_P
EARP_N
AUXSP
EARP_HF
VDD2
R210
IT_PMU
SDA
SCL
SIMIO
SIMCLK
C207 C206
DD
DCL
DU
FSC
BIOCLK
BOEN
BDIO
R213
VDD1
R212
R205
BIEN
C205
C204 C203
AVDD
G12
H12
B7
C6
E7
D5
L10
N9
G10
AUXST
GPON1
GPON2
RFSIG0
AVDD
VDD1
C200
R719
VDD1
VDD3
VDD2
VDD1
VDD1
VDD_VBOUT
C12
VDD_VB
B12
VDD_REF
D14
C9
F12
P12
L3
G2
P4
P8
C8
N12
P9
K6
N13
F5
VDD_D
VDD_BB
AVDD
VDDE3_G
VDDE3_F
VDDE3_B
M6
VDDE3_A
VDDE2_E
C1
VDDE2_C
VDDE1_D
H11
VDDE1_C
VDDE1_B
VDDE1_A
VDDC_D
VDDC_C
M8
VDDC_B
VDDC_A
K10
A6
RFSIG1
D7
D6
B6
A7
C7
E10
TXON
RXON
RFSIG6
RFSIG7
RFSIG8
RFSIG9
RFSIG2
RFSIG3
RFSIG4
RFSIG5
RFSIG10
C202
C14
K12
J12
D9
D8
E9
CDI
CEN
CDO
CCLK
D12
E12
D13
VREF
RFE_N2
RFE_N0
AUXDAC3
AUXDAC1
AUXDAC2
R203
H14
H13
J14
J13
A11
B10
A10
F14
G14
E14
F13
IP
IN
QP
QN
EARP
EARN
AUXSP
AUXADC1
AUXADC2
AUXADC3
AUXADC4
U706
R208
DD
DU
DCL
FSC
C2
B3
M14
M11
B13
A13
D10
B11
B14
BUZ
MICP
MICN
AUXMICP
G11
A14
A9
B9
B8
A8
ADI
AFS
ADO
ACLK
MCLK
AUXMICN
M13
F4
E11
F10
BIEN
BDIO
BOEN
E6
F11
SCK
SDA
SIMIO
PWM0
PWM1
SIMCLK
BIOCLK
SIMERR
VSS_VBOUT
C11
VSS_VB
A12
VSS_REF
C13
VSS_D
D11
VSS_BB
E13
VSS_P
N5
VSS_O
P1
VSS_N
K1
VSS_M
G1
VSS_K
C3
VSS_I
E8
VSS_H
G13
VSS_G
N11
VSS_F
N14
VSS_E
N10
VSS_C
M7
VSS_B
J1
VSS_A
K7
R211
AVSS
P10
J_SEL
J_SEL
TRST_N
TDO
TCK
TMS
TDI
TXD
RXD1
RXD0
TXD0
RXT0_N
CTS0_N
B4
A1
D3
A3
A2
D2
A4
D4
C4
C5
A5
B5
TRST_N
TDO
TCK
TMS
TDI
TXD1
RXD1
RXD0
TXD0
RTS0
CTS0
RSTO_N
RST_N
RESETN
CKI
CKI32I
CKI32O
AUXON
P11
R201
R200
32K
D_REF_13M
H4
P13
P14
H10
C10
K14
M10
HD(0)
C201
RSTON
HD8
HD9
HD14
HD2
HD3
HD4
HD5
HD6
HD0
HD1
J3
E5
E4
H2
H1
B1
H3
HD(1)
HD(2)
HD(3)
HD(4)
HD(5)
HD(6)
HD(7)
HD15
HD7
HD10
HD11
HD12
HD13
F3
F2
F1
E2
E1
E3
B2
D1
HD(8)
HD(9)
HD(10)
HD(11)
HD(12)
HD(13)
HD(14)
HD(15)
HA8
HA9
HA3
HA4
HA5
HA6
HA7
HA2
HA1
L4
P2
P3
N2
N3
K5
M1
M3
M4
HA(1)
HA(2)
HA(3)
HA(4)
HA(5)
HA(6)
HA(7)
HA(8)
HA(9)
HA17
HA18
HA10
L2
N1
HA(11)
HA(10)
HA19
HA11
HA12
HA13
HA14
HA15
HA16
J4
J2
J5
L1
K4
K2
K3
G4
M2
HA(12)
HA(13)
HA(14)
HA(15)
HA(16)
HA(17)
HA(18)
HA(19)
HA(20)
HRD_N
HWR_N
HA24
HA25
HA26
HA20
HA21
HA22
HA23
CS_N2
CS_N3
J7
J6
L5
L6
P5
H5
H6
N6
G3
M5
HA(26)
HA(24)
HA(25)
HA(23)
HA(21)
HA(22)
GPIO4
GPIO5
GPIO6
GPIO7
GPIO8
GPIO0
CS_N0
CS_N1
K9
N4
G5
M12
GPIO9
GPIO1
GPIO2
GPIO3
L7
L9
L8
P7
P6
N7
N8
K8
M9
R207
R206
VDD3
FLIP
M_SEL
HRD_N
HD(0:15)
HA(1:26)
U201
VDD3
HWR_N
NCSRAM
CS_NAND
HA(20)
1
2
A
_E
GND
Y0
VCC
Y1
43
5
6
IMAGE_CS
MELODY_CS
NCSFLASH
CTS0
M_RST
CHG_ON
JACK_EN
IMAGE_INT
IMAGE_RESET
END_OF_CHARGE
KBIO1
KBIO2
KBIO3
KBIO4
KBIO5
KBIO6
KBIO7
GPIO10
KBIO0
J10
J11
L11
L13
L12
L14
K13
K11
KBIO(7)
KBIO(6)
KBIO(5)
KBIO(4)
KBIO(3)
KBIO(2)
KBIO(1)
KBIO(0)
KBIO(0:7)
7-5
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Flow Chart of Troubleshooting
7-6
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3. Charging Part
Flow Chart of Troubleshooting
Abnormal charging part
Yes
Check the C508
> 4.9V
Yes
U502 pin 5 = "H"?
Yes
U502 pin = "L"?
Yes
Check the C507
≒ 4.2V
Yes
END
No
No
No
Check the the circuit related to
V_EXT_CHARGE
Resolder or replace U502
Check the circuit related to
CHG_ON signal
No
Resolder or replace U502
7-7
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Flow Chart of Troubleshooting
Charging
VDD2
R508
END_OF_CHARGE
R511
1
ITERM
2
BAT
3
_CHRG
4
GND
GG
U502
9
10 11
_EN
_ACPR
VCC
PROG
GG
12
VBAT
R507
C507
8
7
CHG_ON
CHARGER_OK
R509
C505
MES_BATT
V_EXT_CHARGE
V500
6
5
R512
ZD501
C508
C506
7-8
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