Samsung GT-E2121B User manual

GSM TELEPHONE
GT-E2121B
1. Safety Precautions
2. Specification
3. Product Function
4. Array course control
5. Exploded View and Parts list
6. MAIN Electrical Parts List
7. Block Diagrams
8. PCB Diagrams
9. Chart of Troubleshooting
10. Reference data
11. Disassembly and Assembly
Instructions
GSM TELEPHONE CONTENTS
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This Service Manual is aproperty of Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.
Samsung Electronics Co.,Ltd.
2010. 03. Rev.1.0
ⓒ
Country Web Site
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CIS cis.samsungportal.com
Europe europe.samsungportal.com
China china.samsungportal.com
Asia asia.samsungportal.com
Mideast &Africa mea.samsungportal.com
GSPN (Global Service Partner Network)

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9. Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-1
9-1. Power On
No
NotOK
Not OK
Not OK
Not OK
Check VPERM_3.0V,
VANA_2.85V, VRF_2.85V,
VSIM_3.0V, VMEM_1.8V,
VGPIO_2.8V of UCP201
Check the UCP201
END
OK
Check the pin 1of
OSC201 produces clock
signal
Solder OSC201 again
OK
Check the L118
concerning about Jig
Power on
Solder L118 again
OK
Is Power On working?
OK
Repeat sequence
Yes
Change battery
Check battery voltage
is higher than 3.3V
Yes
'POWER ON' does not work

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Flow Chart of Troubleshooting
9-2
EAR_MIC
C150
VBAT
L115
C148
R125
C135
L116
R124
DL118
D3
G
1
S2
3
R120
L113
C137
U313
C133
C134
R126
C147 C149
C136
R119
R117
R122
R138
R139
R137
VCHG_5V
R123
VDD_AIT_3.3V
C132
U314
27
NC
8
8
9
9
21
NC
NC 22
NC 23
24
NC
NC 25
26
NC
19
19
2
2
20
20
3
3
4
4
5
5
6
6
7
7
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
HY20-AB0310
IFC100
1
1
10
10
6
R128
ZD105
1
2
3
4
5
3
4
5
6
ZD104
1
2
L111
L117D
UART0_TD
UART0_RD
VCM_OUT
JIG_ON_IF
AUX_DET
JIG_ON
USB_EN
R_ANT
USB_DP
EAR_P
EAR_SW
EAR_MIC_N
EAR_MIC_P
EAR_SW_REF
USB_DM
EAR_N
L201
W9
UART1_RD W5
W6
UART1_RTS
W8
ICHGN
ICHGP
W12
PMU_VPERM W13
PMU_VRF
W14
PMU_VANA
W15
PMU_VIO
V5
UART1_TD V7
UART1_CTS
V8
POK_OUT
PMU_VSIM
V15
PMU_VMEM
V14
T5
PWM_OUT1
T6
PWM_OUT2
T7
PWM_OUT0
T8
POK_IN
L15
FE_CTRL3
L18
UART0_RD
L19
XTAL_32K_1
UART0_TD
K19
XTAL_32K_2
FE_CTRL2 K15
K18
J18
PCM_SYNC
J19
PCM_CLK
PCM_DI
H16
PCM_DO
H18
H19
SIM_CLK
H15
G1
RFIE_N
F1
RFIE_P
E1
RFID_N
D1
RFID_P
B5
XTAL_SHLD
B6
XTAL_SHLD
B7
XTAL_SHLD
B8
XTAL_SHLD
C1
RFIP_N
A8
XTAL_SHLD
B1
RFIP_P
A2
RFOL
A5
XTAL_SHLD
A6
XTAL_26M_2
A7
XTAL_26M_1
UCP201
PNX4852
A1
RFOH
2
43
1
OSC200
3
21
OSC201
UART1_TD
ONKEY_1
VPERM_3.0V
VRF_2.85V
VANA_2.85V
VGPIO_2.8V
UART1_RD
ICHGN
ICHGP
ONKEY_2
VSIM_3.0V
UART0_TD
DCSRX_N
EGSMRX_P
EGSMRX_N
DU
DD
SIM_CLK
PON_PA
FSC
DCL
UART0_RD
MOD_STANDBY
DCS_TX
EGSM_TX
DCSRX_P
VMEM_1.8V

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Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-3

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Flow Chart of Troubleshooting
9-4
9-2. SIM Part
"Insert SIM" is displayed on the LCD
VSIM_3.0V at the pin#1
SIM200 = "H"?
No
Check the SIM Power
Yes
Is there any signal pin
#2,3,4 of SIM201? Check UCP201
No
Yes
Check the SIM Card
END

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Flow Chart of Troubleshooting
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9-5
C234
G
1314
GG
1516
G
C232
2
34
5
6
7
7
88
99
SIM201
1
1010
11 11
1212
VSIM_3.0V
R213
C233
SIM_CLK
SIM_DATA
SIM_RST

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Flow Chart of Troubleshooting
9-6
9-3. Microphone Part -Phone MIC
Phone MIC does not work
Yes
Not OK
Check the connection
of MIC Solder MIC again
Yes
Replace MIC
OK
Is Phone MIC working?
OK
Solder R118, R132, C141, C145 and
C142 again
Check the components
which are connected to
MIC_BIAS
Solder L108, R131, ZD100 and ZD103
again.
Check the circuit
of MIC PART
END
Not OK
Not OK
No
OK

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Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-7
MAIN_MIC
R118
R132
C142
C146
R130
MIC_BIAS
ZD103ZD100
0ohm
R131
L108
MIC100
C140
C141
C145
MIC_P
MIC_N

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Flow Chart of Troubleshooting
9-8
9-4. Microphone Part -Earphone MIC
Earphone MIC does not work
Yes
Not OK
Check the connection
of IFC100 Solder pin 3of IFC100 again
Solder L111, L113 and R120 again
Check the circuit
of EAR MIC
OK
Solder R118, R132, C141, C145 and
C142 again
Check MIC_BIAS.
(When UCP201 operates
and call is connected )
OK
END
Not OK
Is Earphone MIC working? Repeat the sequence
Yes
No
OK
Not OK

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Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-9
1
S2
Q100
D3
G
L111
C137
R128
R119
R125
C133
1
2
3
4
5
6
ZD105
L115
R117
1
2
3
4
5
6
ZD104
R123
C134
C138
L117
VCHG_5V
C150
L113
VBAT
1005
R126
R122
R120
C136
C147
C139
L116
C135
NC 22
NC 23
24
NC
NC 25
26
NC
27
NC
20
20
3
3
4
4
5
5
6
6
7
7
8
8
9
9
21
NC
14
14
15
15
16
16
17
17
18
18
19
19
2
2
HY20-AB0310
IFC100
1
1
10
10
11
11
12
12
13
13
VDD_3.3V
C149 C148
R129
C132
R124
L118
VCM_OUT
JIG_ON_IF
AUX_DET
UART0_RD
JIG_ON
TA_DETECT
USB_EN
UART0_TD
EAR_MIC_N
EAR_MIC_P
EAR_SW_REF
USB_DM
EAR_N
R_ANT
USB_DP
EAR_P
EAR_SW
MAIN_MIC
R118
R132
C142
C146
R130
MIC_BIAS
ZD103ZD100
0ohm
R131
L108
MIC100
C140
C141
C145
MIC_P
MIC_N

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Flow Chart of Troubleshooting
9-10

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Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-11
9-5. Earphone Part
Earphone does not work
Yes
Not OK Solder pin 5,6,7 of IFC100
,L115, L116 and L117 again
Check the circuit
of IFC100
OK
Check the UCP201
Pin R19, T19, P19 Solder UCP201 or replace UCP201
Not OK
END
Yes

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Flow Chart of Troubleshooting
9-12
R209
C228
EAR_OUT_N|R
W16
EAR_OUT_P|L
W17
HSET_OUT_N
W18
HSET_OUT_P
W19
INTMIC_IN_P
V19
EXTMIC_BIAS
U18
INTMIC_IN_N
U19 INTMIC_BIAS
T18
EXTMIC_IN_P
T19
AUXAUD_IN_R
R18
EXTMIC_IN_N
R19
HKSW_DET1
P19
HKSW_DET2
N19
R210
FM_L
FM_R
KEYIN(0)
MIC_BIAS
EAR_MIC_N
EAR_MIC_P
MIC_N
MIC_P
SPK_P
EAR_P
SPK_N
EAR_SW_REF
EAR_SW
EAR_N
Digital External Interface- UART
EAR_MIC
1
S2
Q100
D3
G
L111
C137
R128
R119
R125
C133
1
2
3
4
5
6
ZD105
L115
R117
1
2
3
4
5
6
ZD104
R123
C134
C138
L117
VCHG_5V
C150
L113
VBAT
1005
R126
R122
R120
C136
C147
C139
L116
C135
NC 22
NC 23
24
NC
NC 25
26
NC
27
NC
20
20
3
3
4
4
5
5
6
6
7
7
8
8
9
9
21
NC
14
14
15
15
16
16
17
17
18
18
19
19
2
2
HY20-AB0310
IFC100
1
1
10
10
11
11
12
12
13
13
VDD_3.3V
C149 C148
R129
C132
R124
L118
VCM_OUT
JIG_ON_IF
AUX_DET
UART0_RD
JIG_ON
TA_DETECT
USB_EN
UART0_TD
EAR_MIC_N
EAR_MIC_P
EAR_SW_REF
USB_DM
EAR_N
R_ANT
USB_DP
EAR_P
EAR_SW

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Flow Chart of Troubleshooting
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9-13
9-6. Charging Part
Abnormal charging operation
Yes
Not OK
Check the U200
Pin #1 = 5V? Replace U200
OK
OK
END
Check the TA connection.
Check the C225 and
R214 Solder C225 and R214.
Not OK

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Flow Chart of Troubleshooting
9-14

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Flow Chart of Troubleshooting
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9-15
9-7. Speaker Part
Speaker does not work
Yes
Not OK Solder R210, L109, L110, ZD101 and
ZD102 again
OK
END
Not OK
Solder UCP201 again or replace
UCP201
Not OK
Check Pin W18, W19 of
UCP201
Check R210, L109, L110,
ZD101 and ZD102
OK
Replace the speaker

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Flow Chart of Troubleshooting
9-16
HSET_OUT_N
W18
HSET_OUT_P
W19
HKSW_DET1
P19
HKSW_DET2
N19
R210
SPK_P
SPK_N
EAR_SW_REF
EAR_SW
SPEAKER
ZD101
L110
L109
SPEAKER_PAD
33nH
ZD102
C143
SPK_P
SPK_N

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Flow Chart of Troubleshooting
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9-17
C143
L109
L110
L302
R324
SPEAKER_PAD
U307
ZD101
ZD102

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Flow Chart of Troubleshooting
9-18
9-8. Key Data Input
When one of the keys is
pushed,
is it displayed on LCD?
Check the Dome sheet &Key FPCB
END
No
Yes
Yes
Check Initial Operation
When one of the keys is
pushed,
KEY_IO signal is OK?
Replace the PBA
No
Yes