SAMSUNG SGH-E820 Service Manual Troubleshooting
7. SGH-E820 Flow Chart of Troubleshooting
1. Power On
' Power On ' does not work
Yes
Check the Battery Voltage
is more than 3.4V
Yes
C412(V_ISUP) = 2.7V? Check the PMU related to V_ISUP
Yes
Check the Clock at
R402=32KHZ
Yes
C433(VDD1) = "H"? Check the VDD1 circuit
Yes
No
Change the Battery
No
No
Resolder X400
No
C432(VDD2) & C431(VDD3)
= 2.8V?
Yes
Check for the clock at C139
= 13MHz
Yes
Check the initial operation
Yes
END
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No
No
7-1
Check the VDD2,VDD3 circuit
Check the clock generation circuit
(related to OSC101)
Flow Chart of Troubleshooting
6 6
55
7 8
G
G
9 10
G
CN400
G
1 1
3 34 4
PC-D6-A6-H2.9-S
22
C401
100NF
C400
4.7UF
SIM_CLK
SIM_RST
SIM_IO
SIM_VCC
SIMCLK
SIMIO
8.2PF
8.2PF
C409
C410
X400
FC-135
2 1
10M
R402
VBAT
C413
6.3V
4.7UF
VBAT
VCC_CP
C417
4.7UF
C416
4.7UF
C415
4.7NF
L400
BLM11A102SPT
AVDD
AVDD_TEMP
AUDIO_SW2
VIBVDD
C418
1UF
VBAT
C427
470nF
C426
470nF
470nF
C425
C2
C6
B8
C1
D2
C3
D1
IO
RST
CLK
VCC
CPRES
C402
6.3V
4.7UF
VBAT
C404
100NF
A1
SIMSCN
B1
SIMSCP
A2
SI M
PUM P
SIMGND
B2
SIM
100NF
C403
Baseband power suppl y
VDD1
10K
R400
CHARGE
SIMVBAT
GENERATO
R
C10
K2
K1
J2
A9
D9
H3
K3
D10
H5
TM
U400
INTERRUPT
IN T
REC3
ON/OFF
CONTROL
REC1
REC2
CLK32
RSTO
ONKEY
AUXO N
SLPMOD
dat a
contro l
statu s
12C
INTERFACE
SCL
SDA F2
E3
PMU (IC)
PCF50601ET1-N5
32K
RSTON
RECO1
IT_PMU
JIG_REC
REF_ON
JACK_IN
ONKEY_N
CHARGER_OK
SCL
SDA
K9
K8
SIMIO
OSC32I
SIMCLK
SI M
32KHz XTAL
INTERFACE
PLL
CLOCK
GENERATOR
internal
clocks
htm p
ovdd
voltage
referenc e
bias current s
calibratio n
&
ON-CHI P
MIC BIAS
REFERENCE
refgnd
REFC
REFGND
MICBIAS
H8
K6
J6
VBAT
BAT400
RB414_IV02N
4.7UF
C406
C408
15PF
4.7PF
C407
MIC_BIAS
C405
TACL106M006R
BLVDD
E1
E2
D3
CHRIV
CHRREG
OSC32O
CHRVBAT
CHARGE
BATTERY
VOLTAGE
MONITOR
CONTROL
OSCILLATOR
VBA T
CLOCK
REAL-TIME
suppl y
internal
htmp
SUPPLY
MODULE
INTERNAL
SENSOR
TEMP HIGH
V_ISUP
BACKLIGHT
VBACK
VBAT K4
ISUPA
ISUPD
BLVBAT
BLVDD
H6
J4
J5
B7
A7
C411
100NF
470nF
C412
C414
R401
15K
BLVDD
BACKLIGHT
B9
A10
C9
C8
HVSSCP
HVSGND
HVSVBAT
SUPPLY
(CHARGE
HIGH VOLTAGE
LINREG
CONTROL
SUPPLY &
RF1SWS
RF1VDD
RF2SNS H9
RF2VDD
RFVBAT
RF1SNS
BBMGND
BBMSW
G10
F9
H10
G9
F10
E8
A8
C5
VBAT
1UF
VCC_SYN
VCC_RX_TX
PON_SYNT
VCC_RF_VCO
VCC_TX_BURST
2
B10
D8
NC 1 NC
HVSOC
HVSSCN
HVSVDD
PUMP+
LINREG)
SWITCH
RF1VDDS
RF2SWS
RF2VDDS
E10
J10
PON_TX
A3
VIBVD D
VIBVBAT
B3
B6
HFAVD D
VIB
A6
HFAVD D
HFAVBAT
A5 B5
HFAVBAT
HFA
AVD D
K10
AVDDS
K7
AVD D
J7
AVD D
AVDDVBAT
J8 J9
AVDDVBAT
A4
DVDD4
B4
DVDD 4
DVDD4VBAT
F8
DVDD4ON
DVDD3
H1 J1
DVDD3
H2
DVDD 3
DVDD3VBAT
H4
SEL3RB
DVDD2
G2 G1
DVDD2
DVDD 2
G3
DVDD2VBAT
E9
SEL12RB
F3
DVDD 1
DVDD1VBAT
F1
DVDD1
VSS21
D4 C4
VSS20
VSS19
E5 D5
VSS18
VSS17
C7 D6
VSS16
VSS15
E7 D7
VSS14
VSS13
F7 E6
VSS12
VSS11
VSS10
VSS9
VSS8
VSS7
VSS6
VSS5
VSS4
VSS3
VSS2
VSS1
VPRO G
C419
100NF
4.7UF
6.3V
C424
C420
100NF
C423
100NF
10UF
C422
6.3V
C421
10UF
6.3V
V_ISUP
G7 G8
VDD1
F6 G6
G5 K5
J3
VDD2
G4
F4
F5
E4
VDD3
H7
VDD_KEY
C429
27PF
C428
6.3V
4.7UF
1UF
C433
C432
4.7UF
4.7UF
C431
1UF
C430
VDD_KEY_ON
7-2
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2. Initial
Flow Chart of Troubleshooting
Initial Failure
Yes
R207 (RSTON) ="H"?
Yes
Is U300 pin 4,6
(memory CE) OK?
Yes
Check the circuit around LCD
Yes
END
No
Check the circuit related to reset
No
Check the U300
7-3
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Flow Chart of Troubleshooting
AMP_P
SPK_P
D_REF_13M
32K
RSTON
HD(0:15)
HA(1:26)
C225
10NF
3
K6 P9
N1
M8
B
C
VDDC_
VDDC_
D
VDDC_
VDD1
VDDE1_A
2
1
C8
N1
H1
VDDE1_B VDDE1_C
VDDE1_D
VDD1
F5
P11
CKI
P13
CKI32I
P14
M10
C10
H10
K14
H4
H3
H2
E5
H1
B1
E4
F3
F2
F1
E1
D1
E3
E2
B2
M4
J3
CKI32O
RESETN
RSTO_N
RST_N
AUXON
HD0
HD1
HD2
HD3
HD4
HD5
HD6
HD7
HD8
HD9
HD10
HD11
HD12
HD13
HD14
HD15
HA1
10K R207
R208
100K
HD(0)
HD(1)
HD(2)
HD(3)
HD(4)
HD(5)
HD(6)
HD(7)
HD(8)
HD(9)
HD(10)
HD(11)
HD(12)
HD(13)
HD(14)
HD(15)
HA(1)
A
VDDC_
VDD3
VDD3
VDD3
R303
R304
100K
100K
6
5
4 3
HA(23)
NCSFLAS H
U300
1
A
Y0
2
GND
VCC
_E
Y1
NC7SZ19L6X
VDD3
U301
1
6
CS_NAN D
HRD_ N HRD_N
2
A
GN D
_E
NC7SZ19L6 X
Y0
5
VCC
4 3
Y1
C306
R311
1NF
VDD3
1K
CS_NAN D
NCSRAM
HWR_ N
HA(25)
HA(26)
HA(1:22)
VDD3 VDD3
100K
100K 100K
R306
R305
R307
7-4
Memory
(128M ROM + 256M NAND + 64M SCRAM )
HA(1)
HA(2)
HA(3)
HA(4)
HA(5)
HA(6)
HA(7)
HA(8)
HA(9)
HA(10)
HA(11)
HA(12)
HA(13)
HA(14)
HA(15)
HA(16)
HA(17)
HA(18)
HA(19)
HA(20)
HA(21)
HA(22)
C303
C304
100N F
10N F
H1
G1
G2
D1
C1
G7
D7
C8
D8
H8
D2
G6
C5
D5
K5
G4
H2
H3
H5
D6
G3
C6
C2
C7
G5
F1
E1
F3
E7
F7
E8
F8
E2
F6
E6
L5
L4
J4
J1
F2
F4
F5
E3
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
VCCN
VCCN
VCCU
VCCU
VCCR
VCCQ U
_CEN
_CSU
_CER 1
_CER 2
_O E
_W E
_R E
_WPN
_LB
_U B
_WP/ACC
_RESET
R/_BR
R/_BN
_Z Z
KBB06B400M-F402
U302
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15/A- 1
_BYT E
VSS1
VSS2
L1
HD(0 )
DQ0
L2
HD(1 )
DQ1
J2
HD(2 )
DQ2
K3
HD(3 )
DQ3
L6
HD(4 )
DQ4
J7
HD(5 )
DQ5
L7
HD(6 )
DQ6
K8
HD(7 )
DQ7
K1
HD(8 )
DQ8
K2
HD(9 )
DQ9
L3
HD(10)
J3
HD(11)
J6
HD(12)
K7
HD(13)
J8
HD(14)
L8
HD(15)
J5
E5
C3
CL E
D3
AL E
H7
C4
NC
D4
NC
E4
NC
G8
NC
H4
NC
H6
NC
K4
NC
K6
NC
1
NC
2
NC
A1
DN U
B1
DN U
A8
DN U
B8
DN U
M1
DN U
N1
DN U
M8
DN U
N8
DN U
VDD3
R308 100K
HD(0:15)
HA(2 )
HA(3 )
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3. Charging Part
Flow Chart of Troubleshooting
Abnormal charging part
Yes
Check the U204 pin 4
> 4.9V
Yes
U204 pin 1 = "H"?
Yes
Q201 pin 1(CHG_ON)
= "L"?
Yes
Check the U204 pin 3
≒ 4.2V
No
No
No
No
Check the circuit related to
V_EXT_CHARGE
Resolder or replace U204
Check the circuit related to
CHG_ON signal
Resolder or replace U204
Yes
END
7-5
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Flow Chart of Troubleshooting
MES_BATT
V_EXT_CHARGE
C240
100N F
CHG_ON
C241
10UF
10V
1
ZD202
UDZS8.2B
Q201
BCR133T
R236
270K
R239
3
180K
2
Q202
4
S2
5
G2
6
D1
FDG6301N
VDD2
R231
U204
47 K
BAT
GND
_CHRG
3
2
1
END_OF_CHARGE
4
R235
1.8K,1%
3
D2
G1
S1
R237
270K
2
1
R238
180K
VCC
5
PROG
LTC4054ES5-4.2
VBAT
C243
10U F
6.3V
R233
330K,1%
R234
200K,1%
C242
100NF
CHARGER_OK
7-6
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4. Sim Part
Phone can't access SIM Card
Yes
CN400 pin 1,5 = "H"?
Yes
Flow Chart of Troubleshooting
No
Check the sim charge pump
After Power ON,
Check SIMCLK Signal on CN400
pin3 in a few second
Yes
After SIM card insert,
CN400 pin 2 = "H(SIM_RST)"?
Yes
Check the SIM Card
Yes
END
No
Check the X400
No
Replace PBA
7-7
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Flow Chart of Troubleshooting
Baseband power suppl
C10
T
IN
CLOCK
R
INTERRUPT
GENERATO
SIM
C403
100NF
B2
CHARGE
PUM P
INTERFACE
B1
A2
SIMGND
SIMVBAT
SI M
SI M
A1
SIMSCP
SIMSCN
C404
100NF
VBAT
C402
4.7UF
6.3V
VCC
CLK
RST
CPRES
SIMIO
SIMCLK
C400
C401
4.7UF
100NF
SIM_VCC
SIM_RST
SIM_CLK
SIM_IO
C2
C3
C1
D2
IO
D1
B8
C6
CN400
PC-D6-A6-H2.9-S
1 1
22
3 34 4
G
G
G
9 10
6 6
55
G
7 8
SIMIO
SIMCLK
7-8
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5. Microphone Part
Microphone does not work
Flow Chart of Troubleshooting
Yes
Check the connection
from MIC
Yes
Check the circuit
from U200 to MIC
Yes
Check U200 PIN 1,9 = ' L' ?
Yes
Check the MIC
No
No
No
No
Resolder MIC
Resolder the R200, R201 R203, R207, C211
and C218
Replace PBA
Replace the MIC
Yes
END
7-9
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