Page 1
8. Level 3 Repair
8-1. Components Layout
MAIN PBA (TOP SIDE)
MAIN PBA (BOTTOM SIDE)
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
Page 2
8. Level 3 Repair
SUB PBA (TOP SIDE)
SUB PBA (BOTTOM SIDE)
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
Page 3
RFBandInformation
SM-M315F Common
GSM:850/900/1800/1900
WCDMA:B1/B2/B5/B8
LTEFDD:B1/B2/B3/B4/B5/B7/B8/ B12/
B13/B17/B20/B26/B28/B66
LTETDD:B38/B40/B41
MAINANT
LB/MB/HB
MAINFEMid
TRX_B7
DUP.
SAW
TRX_B38_41
TX_PA_OUT_B1,2,3,4,5,8,12,17,20,26,66,GSMHB,GSMLB
SAW
Coupler
DPX
DPX
PRX_TR_IN_B12_17
SUBANT
LB/MB/HB
LNA SAW
RFIC_PDET_IN
SP3T
DRXLFEM
SUBANT
X‐GND
DRX_B38_41
DRX_B2_66(4)
DRX_B40
DRX_B28
FMANT
SAW
SAW
SAW
SPDT
GPS/BT/WIFI
ANT
BT/BLE:2402~2480MHz
WiFi2.4GHz:2412~2472MHz
WiFi5GHz:5180~5825MHz
GNSS:1558~1605MHz
SP4T
DPX SAW SP4T
SM-M315F/DSN Block Diagram_REV1.0
SAMSUNG CONFIDENTIAL
THIS DOCUMENT CONTAINS CONFIDENTIAL
PROPRIETARY INFORMATION THAT IS
SAMSUNG ELECTRONICS CO’S PROPERTY.
DO NOT DISCLOSE TO OR DUPLICATE FOR OTHERS
EXCEPT AS AUTHORIZED BY SAMSUNG.
LNA
TX_PA_OUT_B28
PRX_TR_IN_B2_PCS
PRX_TR_IN_B3_DCS
PRX_TR_IN_B4_B66
PRX_TR_IN_B5_GSM850
PRX_TR_IN_B8_EGSM
LNA SAW
HBPAM
MMMBPA
PRX_TR_IN_B28
PRX_TR_IN_B26
PRX_TR_IN_B20
DRX_TR_IN_B7_B38_B40_B41
DRX_TR_IN_B1_B2_B4
DRX_TR_IN_B5_8_13_17_20_28
SAWLNASAWDPX
2GT_WBT
2GR_WBT
5GT_WL0
FM_ANT
TX_TR_OUT_B5_8_12_13_17_20_26_28
PRX_TR_IN_B1
DRX_TR_IN_B3_B66
BT_RF
NFCANT
TX_TR_OUT_B7_38_40_41
TX_TR_OUT_B1_2_3_4_66
TX_TR_OUT _B7_38_40_41
TX_TR_OUT_GSMLB
TX_TR_OUT_GSMHB
PRX_LB2
RX1
TX1
TX2
RX2
Transceiver
BT/WIFI/FM
Module
NFCIC
AUDIOAMP
NFC_SWP
SPKOUT
SIM
SOCKET
SPEAKER
TX0_I_P
TX0_Q_N/P
PRX0_I_P
TR_PDET_OUT
DRX0_I_P
RFIC_SPEEDY
RFIC_RST
GPS_I
GPS_Q
GNSS_SPEEDY
RFIC_CTRL0~2
WL0_IP
WL0_IN
WL1_IP
WL1_Q_N/P
NFC_EN
NFC_CLK_REQ
NFC_FIRM
NFC_IRQ
I2SDATA
MOTOR
LDO
RCV
BuckBoost
I2C
RCV
UFSMEMORY
64GB/128GB
I2C
XBOOT
AP/CP
RAMEN+
POP
MEMORY
LP4x6G
LP4x8G
IRQ
AUDIOCODEC
MAINMIC
MAIN
MIC
SUBMIC
SUB
MIC
DATA
MCLK
EARMIC
EAROUT
EAR
JACK
CAMPMIC
I2C
MCLK
RST
MIPI4lane
MCLK
RST
MIPI2lane
MIPI2lane
MCLK
RST
MIPI4lane
SENSOR_I2C
EEPROM_I2C
MIPI4lane
I2C
SENSORDATA
I2C
INT
SIMTRAY_DET
SIM1DATA
SIM2DATA
IFPMICI2C
CCI2C
USB2.0
UART
IFPMICINT
TYPE_CINT
EAR_L_DET
REARCAM
RCAM164M
RCAM25M
RCAM38M
ULTRAWIDE
RCAM45M
MARCO
FRONTCAM32M
OCTA
DDI
TSPIC
SENSORs
MAGNETIC
SIMSOCKET
T_FLASH
PMIC
VOLUMEDN
VOLUMEUP
IFPMIC
OVP
USB
CON.
SIM1
SIM2
POWERKEY
VBATSENSE
Battery
CON.
DCDCfor
AMOLED
ACC+GYRO
GRIP
RGB
Page 4
R4063
SM-M315F Common
R4065
SOC5002
HEA4000
ZD5004
R5023
R3012
ZD5003
C5139
U3018
R3011
C5094
ZD5005
C3033
C5138
ZD5002
C5126
R5009
R5011
R5022
ZD5014
C5125
R5020
C4009
SOC5000
ANT2002
L2001
C5118
ZD5010
ZD5011
ZD5006ZD5007
C2007
C2044
C4083
L2066
ZD7000
C5032
C5027
TP5006
C5081
C5103
C4067
C4099
C4001
C4008
C4002
C5019
C5016
C7018
C4058
U7000
C4059
C7016
C5135
C5136
C5137
R5021
U5007
C4049
C4072
C4048
SOC5001
ANT2000
L2048
C5060
C5064
L5009
C5013
C4000
C4066
C4065
C4029
C5052
C4004
C2000
L5007
C5018
L5004
C5054
C4092
C4089
C5042
C4084
C4027
C4028
C4100
C4022
C5025
L2049
OSC5000
C5059
C5063
C5053
C5051
L5003
C5006
C4014
C4091
C4093
C4095
C4069
C5058
TP5011
C4076
C4051
C4075
C4085
R5014
C5108
C5107
ZD5000
C5111
C5029
C5035
C5050
C5047
C5030
C5038
C5008
C5065
C5090
C5102
U5000
C5002
C5057
L5006
C5003
C4079
C4080
C5015
C4050
C4088
C4102
C4096
C4098
C4081
C4023
C4042
C4039
C4038
C4082
C4041
C4037
C4045
C4044
R5006
R4041
R4044
R5028R5029
SOC7005
SC6003
C2095
C5026
C5077
OSC2000
C5039
C5040
C5041
C5036
C5084
C5085
C5093
C5010
C5091
C5092
C5000
C5061
C5055
C5066
C5068
C5009
L5002
C5020
C4061
C4086
C4021
C4062
C5021
C4063
C4060
C5067
C4077
U7035
C8196
C4007
C4013
C4018
C4017
C4026
C4087
C4043
C4006
C5056
C4030
C4090
C4068
C4078
C5011
C4031
C4033
C4032
TP5008
C4094
TP_UFS_RX_N
TP_UFS_TX_P
TP_UFS_TX_N
C4016
TP_UFS_RX_P
C4047
C7079
C4040
C4101
TP4011
C7080
C5005
C5004
C5014
C5001
C4097
C4046
L5001
SOC7003
L7010
C5028
C5104
C5037
C5023
C7032
C5116
TP5017
C5999
L5000
L5008
TP5010
C5062
C5109C5110
UME5000
L5005
C5073
C5100
C5022
C5141
L5010
C7050
C5144
C5130
U5003
C5129
L5020
C4036
C4005
C4074
U7002
C4071
C5142
C5143
ZD5012
C5115
C7052
C7049
U7003
C7051
C7048
C4073
C7081
ZD7006
C7040
C7082
ZD7004
ZD7007
TP7001
SOC7004
MIC6000
C3010
R6007
C6016
C8195
L6015
L6012
C8194
ANT3002
ZD3001
C3097
C1044
C1046
C1112
L1081
L1070
L1073
U2016
C2036
L2028
C2053
C2028
C2100
C2042
C3031
C2033
L3016
C2034
C6059
C6026
R6025
ZD3000
ANT3001
TP3011
C1070
C1053
L1049
L1055
L1040
L1033
L1041
C2032
C2031
L2015
L2022
L2009
SC6005
C3005
C3000
C3015
L1045
SC6004
L1050
C1066
L1051
F1003
L1030
L1038
L1082
C1051
U1001
L1002
C6030
C1106
L1029
F1001
C1052
C1035
C1107 C1108
L1069
L1028
F1009
F1000
C1034
C1003
L1003
C1005
L1025
C1008
C1028
U1000
C1001
C1002
C1007
L1000
C1103
L1009
L1011
L1001
L1013
L1015
L1006
L1007
L1042
L1020
C1013
C1101
C1048
L1023
C1029
L1017
L1018
L1019
L1074
L1016
C1009
L1068
C1019
C1020
C2056
C2046
C2057
C2047
U2002
L1076
C1041
ZD6015
C6029
R6016
L7002
C4011
C5080
R4028
R4031
R4040
R4042
C7006
C7034
C7033
ZD7002
TP5009
R5001
R4013
R4011
TP5013
C2098
U2020
C1045
C1049
L1035
C1040
C2029
C2030
L2014
L2017
C2025
C2026
C1050
PAM1000
C1038
C2045
L2037
C2097
C1037
C1036
C1039
L2013
L2040
L2027
L2031 L2036
C2008
L2038
C2023
L2024
C2024
L2026
C2037
C5998
R5052
C5031
C5034
R5003
R5004
C5012
C5101
TH5000
C5033
C5113
R5002
U5001
U7004
C5017
C5070
L5012
C7076
C7077
C7041
R7011
U3013
C5072
C5074
C3057
ZD7005
R5008
R6024
R6026
R5007
ZD5001
R5000
R5012
C5099
C5096
C5095
L5013
C5114
C5106
C5079
C5071
C5075
R5010
ZD6012
ZD6011
R2001
C5082
R5005
D5000
C5097
C5069
U5002
D5001
R6018
C5105
C2038
C2020
C2054
C2021
L3017
C2055
L2023
C2035
L3008
F3002
R6028
R6034
R6008
C6002
F3004
C3090
L3034
C3026
U3004
L3027
L3010
C3016
C3037
L3002
C3023
U3015
C1054
F1002
C1105
U1015
L1027
C1076
C1077
U1002
C1021 C1022
L1071
C1086
C1087
L1067
F1005
C1031
ZD6013ZD6014
R6017
C3027
C3087
U3001
L3026
C1073
TP1000
L1064 L1065
C1088
L1072
L3001
C3020
C1006
C1011
TP1001
ZD6005
C3079
C3019
L1034
L1032
C1010
F1004
F3000
C3009
C3004
C3021
C3003
L3000
L3006
C6037
F3003
L3018
C3025
TH4001
R4021
L3020
C3007
C1110
R6011
L6011
C3006
C3001
C1109
F1006
C1030
C1094
ANT3003
C3040C3041
L3013
L3015
C3018
C1033
C1043
L1037
C1072
C1065
L1022
C1018
C6012
L3014
C3008
C3022
L3009
C3052
F3001
L3003
C3077
C3028
C3050
L3005
U3005
L3007
C3030
L3012
C1102
C1114
ZD1002
R1004
R1006
L1004
L1024
L1052
C1004
R1000
R1001R1002
C1024
C1000
R1003
ZD1001
C1061
C1063
C1062
C1032
L1026
C1042
L1031
C1075
L1053
C1071
L1046
L1043
C1064
C1012
L1014
C1017
L1066
L1021
C1016
C1091
L1062
C1015
C1085
C1014
C1056 C1057
L1063
L1060
L1057
L1054
C1058
L1012
L1079
C1092
U1005
C1090
C1100
C1082
L1048
C1093
L1058
C6010
L6007
L6014
C6009
R6009
C6017
L6002
R6010
R4047
R6019R6021
R6013
C1099
L1010
L1008
L1047
C1098
C1104
L1056
C1074
RFS1000
C1069
C1068
C1067
C1047
PAM1001
L1036
L1005
TH1000
C1060
C1096
C1095
R1005
L1044
C1059
C1097
CON6000
CLIP1000
SOC6000
TP_UB
DP_LAY8
DN_LAY8
Page 5
ANT2013
SM-M315F Common
BH6004
C3053
C3058
C3013
C3054
TP3007
U3002
C3060
C3035 C3036
C3042
BH6000
C3024
L3011L3028
C3082
TP3010
ANT5000 ANT5001
U3006
C3078
R3000
R3001
C3059
C3046
ZD5013
C3039
C3011
C3032
C5088
C3002
C5087
C3017
C5128
U3000
U5006
R5024
C3012
C5127
SIM604UP
SIM601
SIM603
L2053
C2017
SC6000
L6000
L2054
U2000
L2020
C2022
C2027
C6003
C6001
L2003
BH6001
ZD7003
L6013
C6090
U6012
C6084
C6051
C6015
C6085
C5089
ZD7001
R4001
R4052
R6035
C6042
C5049
R4025
R4038 R4039
C6046
C6089
C6043
R4058
R4056
R4006
R4036
R4061
C6093
L7009
C7107
C8192
C6091
L7005
C6040
C6041
R6004
R6994
R6038
R6023
R6002
R6022
R6015
C6087
C6086
C6025
C6083
C5046
C7010
C5076
C5044
C5043
R4004
R4020
C5078
R4026
R4037
TP5007
TP5014
TP5002
TP5003
R4030 R4032
R4002
C7108
C7104
L7007
ANT2015
C2041
L2050
U2001
L2016
C2006
L2051
L2010
L2011
L2012
L2021
C2039
TP5004
C2004
C2005
L2005
L2043
L2006
L2042
L2007
L2008
L2041
L2044
L2045
L2004
L2046
L2002
C2001
L2035
L2065
L2034
U2012
C2011
L2032
C2010
C2091
C2040
TP5012
L6008
R4009
R4016
R4003
R4019
R4027
R4008
F2004
L2029
C6014
R6006
L6018
F2002
F2001
C2088
C6088
C6045
C6035
C6081
C6082
L2033
L6005
C6052
TP6022
R6020
R6031
TP6024
TP6999
R6012
C5024
TP6007
TP4000
R4022
R4018
R6003
R6000
C6061
R4050
C4024 C4025
R7003
C4015
TP_XCP_RF_ON4000
TP5001
SC6002
C4019 C4020
C4010
TP_XRSTOUT_N
TP5015
C2048C2049 C2051 C2052
C4034
C4057C4064 C4070
C4053C4054
TP5016
XCP_GPIO4000
TP2002
TP_XGNSS_GPLL_ANA_EXT
C6011
L7006
C2003
C2002
U7006
C2009
L2000
C2014
L2019
L2025
L2052
C2043
C2013
C2012
L2018
C2019
C7035
C7030
F2000
C2016
SC6001
C3014
R3013
C3048
ANT6000 ANT6001
TP3009
TP3013
TP3005 TP3006
TP3008
R6014
R4007
L6001
L6003
C8193
C3080
C7011
R4005
R6001
C6028
C6018
C6021
C6019
C3081
C6000
C6022
U7005
U3003
ZD6000 ZD6001
C6023
C7026
C7017
TP3015
SIM602
TP6000 TP6001TP6002TP6003
CON6001
BH6002
U6001
L6006
C6005
C6047
C6006
L6004
C6027
C6020
C2015
L2030
C2018
U2006
C7004
C2072
TP2001
TP2000
C7005
C3034
C7024
C7013
C7014
C7015
R4043 R4045
TP_3000
C3029
C7025
C7106
L7000
C7023
C7021
R4033
C7029
U7001
C7022
C7020
C7028
U3012
TP_3002
C7012
L7003
C5048
R6997
C6092
C6039
C7009
TH4000
C7105
R4055
R4057
TP_XOM2
TP5000
TP_XOM0
UCP400
C4056
L7008
C7036
C7042
C7037
C7058
C7078
C7038
C7039
C7075
C7086
R4029
C7027
SOC7001
C7019
SOC7000
C7008
R7034
C4012
R4000
C7007
R7001
C7003
R7000
C4003
C4052
C4055
C7057
L7004
C7053
C7089
U7038
C7072
C7069
C7090
L7011
C7068
SOC7002
R4051
R4053
R4054
L7001
C7071
C7000
C7070
C7001
R4062
R4064
R4049
C7002
Page 6
Oscilloscope
Power Supply
8960 & Spectrum Analyzer
8. Level 3 Repair
8-3. Flow chart of Troubleshooting.
Digital Multimeter
+ driver, ESD Safe Tweezer
Soldering iron
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
Page 7
Mobile phone does not power on.
Check the initial operation
END
Check the Battery Voltage.
Is it more than 3.8V?
8. Level 3 Repair
8-4-1. Power On
YES
YES
NO
Charging the battery by TA.
If its voltage level is extremely low
(under 3.0V),
Change the battery.
Power-on the phone and check the
power-on sound
or motor Vibration.
Sound or Vibration is ok?
NO
Check the voltage level at R5023
while pressing power key. Is the
Check the signal of
voltage high?
YES
TRST_N = 1.8V
YES
YES
NO
NO
Change the FRONT-LCD ASSY
Replace the Power key FPCB
Check the output voltage of U5000
L5000 > 0.75V, L5001 > 0.75V, L5002 > 0.75V,
L5003 > 0.75V, L5004 > 0.75V, L5005 > 0.75V,
L5006 > 0.75V, L5007 > 1.1V, L5008 > 1.3V, L5009
> 2.0V, L5010 > 0.75V
and other LDO Voltage
If the output voltage is not normal, Change the
U5000
※ Each voltage level has ±10% margin
Check the Clock OSC5000
Is the frequency 32.768kHz?
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
YES
YES
NO
Replace the OSC5000
※ Test condition (Oscilloscope setting)
: 20.0us.div (time division)
Page 8
Initial Failure
END
Change U5000
Re-download latest SW on the mobile
phone
Change PBA
8. Level 3 Repair
8-4-2. Initial
YES
ABNORMAL
Re Check "Power on"
Trouble shooting process
NORMAL
ABNORMAL
YES
ABNORMAL
Check the OSC5000
(Crack, open etc.)
Check the U5000 (Crack etc)
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
Page 9
No service
END
Home screen → Phone → Keypad →
*#1234# → Check Phone version → CP :
N950FXXXX or unkown
Replace the U2016
8. Level 3 Repair
8-4-3. No Service
Check the Voltage
L5008 : 1.3V, C5084 : 1.3V
YES
YES
CP : A505XXXXX
Check the connection of RF coaxial cable
NO
Replace the U5000
YES
Check the clock OSC5000
Is the frequency 32.768KHz?
YES
YES
NO
Replace the OSC5000
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
Page 10
Insert SIM card
END
Is SIM socket ok?
Replace the UCP400
8. Level 3 Repair
8-4-4. SIM Part
YES
NO
Replace SIM socket
Check the SIM Voltage.
= 1.8V or 3.0V (C6019,C6022)?
YES
YES
YES
NO
Change to the new SIM card.
If it still doesn’t work after changing,
Check the U5000 (Crack etc)
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Page 11
Insert T-Flash card
END
Is SIM socket ok?
Replace the UCP400
8. Level 3 Repair
8-4-5. T-Flash Part
YES
NO
Replace SIM socket
Check the T-flash Voltage.
(C6018 = 3.0V?)
YES
YES
YES
NO
Change to the new T Flash card.
If it still doesn’t work after changing,
Check the U5000 (Crack etc)
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Page 12
Insert TA / USB
END
Charging Sequence Start
VBUS_IF_5V0(C5105) = 5V or 9V
8. Level 3 Repair
8-4-6. Cable Charging Part
YES
NO
Replace SUB PBA or CTC USB FPCB
VBUS_5V_OVP(C5106)=5V or 9V
Check the
Battery is Charging?
YES
NO
Replace U5002
YES
NO
Replace U5001
YES
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Page 13
OTG does not work
END
Check the
VBUS_5V_OVP(C5095) = 5V
8. Level 3 Repair
8-4-7. OTG
YES
NO
Check U5001
(crack, open, damaged, etc.)
VBUS_IF_5V0(C5105) = 5V
Check the
Check OTG working ?
YES
YES
YES
NO
NO
Check U5002
(crack, open, damaged, etc.)
Replace SUB PBA or CTC USB FPCB
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Page 14
Magnetic Sensor does not work
END
Check the voltage
C3033 =1.8V
8. Level 3 Repair
8-4-8-1. Magnetic Sensor
YES
NO
Replace U3003
Check R3011, R3012
(I2C is OK?)
YES
NO
Replace U3018
YES
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Page 15
6Axis Sensor does not work
END
Check the voltage
C3029 = 1.8V
Replace U3012
8. Level 3 Repair
8-4-8-2. 6Axis Sensor
YES
NO
Replace U3003
YES
YES
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Page 16
Proximity Sensor does not work
Check the voltage
C3078 =1.8V
END
Replace U3006
8. Level 3 Repair
8-4-8-3. Proximity
YES
NO
Replace U3003
YES
YES
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Page 17
END
Fingerprint Sensor does not work
Do you change Main PCB or Finger
sensor?
8. Level 3 Repair
8-4-8-4. Fingerprint Sensor
YES
YES
Do calibration.
Check Finger sensor Connector. Is it
SPI Line and VCC(C5138=3.3V)
OK?
Check the Fingerprint Sensor
Replace the Fingerprint sensor module
and do calibration
OK?
NO
NO
Replace Finger Sensor
and do calibration
YES
NO
Replace Main PCB
YES
YES
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Page 18
Check main microphone function
in voice call Handset mode or voice recorder mode
END
8. Level 3 Repair
8-4-9-1. Microphone Part - Main MIC
YES
Check the voltage of L9015
at board = 2.7V
YES
Check the MAINMIC_P data at L9016
YES
NO
Replace MAIN FPCB
NO
Replace MIC9000
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Page 19
Check Sub(2nd) microphone function
in voice call loud SPK mode
or in camcording mode
END
8. Level 3 Repair
8-4-9-2. Microphone Part - Sub(2nd) MIC
YES
Check the voltage at
L6012 = 2.7V
Check the SUB_MIC_P data
at L6015
YES
YES
NO
NO
Replace U6012
Replace MIC6000
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Page 20
Check speaker function.
Play MP3 with maximum volume level.
Check C-clips of Sub PBA
ANT9002, ANT9003
END
Replace speaker module
8. Level 3 Repair
8-4-10. Speaker Part
Check the PWM output at
ANT9002,ANT9003
Check the PWM output at
ANT9002,ANT9003
YES
YES
YES
Yes
YES
NO
NO
NO
Replace C-Clip
Replace MAIN FPCB
Replace SUB PBA
NO
Check the PWM output at ANT9002,ANT9003
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YES
YES
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Replace U6001 on MAIN PCB
Page 21
Check receiver function
in voice call receiver mode
END
Replace RCV module
8. Level 3 Repair
8-4-11. Receiver Part
YES
Check RCV module where
RCV's placed for any
damage
Check the signals on
L6001, L6003
YES
YES
NO
NO
Resolder or Replace
ANT6000, ANT6001
Resolder or replace L6001, L6003
YES
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Page 22
BT/WIFI is not working
END
Resolder or change U3015
8. Level 3 Repair
8-4-12. BT/WIFI
Check BT or WIFI function ON
Check ANT Path
ANT3003, C3008,L3014,C3040,
L3013,F3003,C3027,F3004
Yes
Yes
Yes
No
No
Enable BT or WIFI function.
Resolder or change
ANT3003, C3008,L3014,C3040,
L3013,F3003,C3027,F3004
Check RF path
C3087,L3001,L3018,C3025,
C3023,L3002,C3020,L3026,C3019,
L3034,C3037,C3016
Yes
Yes
Check the Status
F3000,U3001,U3004
Yes
No
No
Resolder or change
C3087,L3001,L3018,C3025,
C3023,L3002,C3020,L3026,C3019,
L3034,C3037,C3016
Resolder or Replace of
F3000,U3001,U3004
Yes
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Page 23
GPS is not working
END
Resolder or change U2016
8. Level 3 Repair
8-4-13. GPS
Check GPS function ON
Yes
No
Enable GPS Function in the setting.
Check Antenna path
ANT3003,C3008,L3014,
C3040,L3013,F3003
L3003,C3077,C3052,C3028,L3009,L3005,
C3030,L3007,L3016,C3031,L3008,L3017
Check RF Component
F3001,U3005,F3002
Check RF Path
Yes
Yes
Yes
Yes
No
No
No
Resolder or change
ANT3003,C3008,L3014,
C3040,L3013,F3003
Resolder or change
L3003,C3077,C3052,C3028,L3009,L3005,
C3030,L3007,L3016,C3031,L3008,L3017
Resolder or change
F3001,U3005,F3002
Check 26MHz Clock at
output of OSC2000
No
Replace the OSC2000
Yes
Yes
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Page 24
END
NFC is not working
Check the Voltage on
C3082 = 1.8V
Resolder or Replace U3002
Check NFC function ON
8. Level 3 Repair
8-4-14. NFC (SM-M315F DSN Only)
Check the Antenna contact
ANT3001, ANT3002
Check 26MHz Clock at TP3011
Yes
Yes
Yes
Yes
No
No
No
No
Enable NFC Function
Resolder or change
ANT3001, ANT3002
Check U3002
(crack, open, damaged, etc.)
Check UCP400
Yes
Check the Status of
C3054,C3053,C3024,C3058,
C3013,C3014,L3011,L3028,
C3048,R3013,C3059,R3000
No
Resolder or change
C3054,C3053,C3024,C3058,
C3013,C3014,L3011,L3028,
C3048,R3013,C3059,R3000
Yes
Yes
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Page 25
FM is not working
END
Check the FM function
8. Level 3 Repair
8-4-15. FM radio part
YES
NO
Enable FM Function.
YES
Check the MAIN PBA
C6030,HEA6000,C3003,L3006
YES
Check the SUB PBA
C9000,L9000,C9034,C9004,U9002,
C9018,L9018,C9019
YES
Resolder or Replace
U3015
YES
NO
NO
Resolder or change
C6030,HEA6000,C3003,L3006
Resolder or change
C9000,L9000,C9034,C9004,U9002,
C9018,L9018,C9019
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Page 26
LCD is still off after PWR ON
END
Check the connection of
SOC7004
Replace the Display module
Replace the Display con-to-con FPCB
8. Level 3 Repair
8-4-16. Display
YES
YES
VDD_LCD_3P0 = 3.0V (C7081)
VDD_LCD_1P8 = 1.8V (C7082)
ELVDD 4P6 = 4.6V (C7079)
ELVSS_-4P4 = - 4.4 ~ - 1.4V (C7078)
ELAVDD_7P6 = 7.6V (C7080)
Check
YES
Check
YES
YES
NO
NO
NO
Reconnect the SOC7004
Resolder or Replace the U7002(3.0V)
Resolder or Replace the U7003(1.8V)
Resolder or Replace the U7038
YES
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Page 27
END
“Camera” function does not work
Check the Camera connector
on Main PBA
Replace the camera module
8. Level 3 Repair
8-4-17. Quad Camera
Check the voltage
C7024 : 2.8V , C7025 : 2.8V
C7022 : 1.2V, C7018 : 2.8V
C7021 : 1.8V, C7019 : 1.05V
C7030 : 1.2V, C7017 : 2.8V
YES
NO
Reconnect the SOC7001, SOC7002, SOC7000,
SOC7005
YES
NO
Resolder or Replace U7000, U7001, U7005, U7006
YES
Check the CAM_MCLK is
24MHz (C7007,C7003)
YES
YES
NO
Replace the PBA
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Page 28
“Camera” function does not work
END
Replace the Front camera module
Check the Camera connector on Main
PBA
24MHz (R7034)
8. Level 3 Repair
8-4-18. FRONT CAMERA
YES
NO
Reconnect the SOC7003
Check the voltage
Check the FCAM_MIPI_CLK is
C7023 : 2.8V
C7020 : 1.05V
YES
NO
Resolder or Replace U7001
YES
NO
Replace the PBA
YES
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YES
Page 29
Touch Screen does not work
END
Replace the Display module
Check TSP Connector on MAIN PBA
8. Level 3 Repair
8-4-19. TSP
YES
NO
Reconnect the SOC7004
Check the voltage
VDD_TSP_A3P0 (C7077) = 3.0V
YES
YES
YES
NO
Resolder or Replace U7004
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Page 30
Motor does not work
END
Replace Motor
Check the Clip
ANT5000 and ANT5001
8. Level 3 Repair
8-4-20. Motor
YES
NO
Resolder or Reconnect
ANT5000 , ANT5001
YES
Check the voltage C5087
C5087 = 3.3V
YES
YES
NO
Resolder or Replace
U5006
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Page 31
8. Level 3 Repair
8-4-21. GSM 850/900/DCS/PCS, WCDMA B2/3/5/8, LTE 2/3/4/5/8/20/26/66 PRx
It is not catching the channel
In normal condition
YES
Check ant path any damage
(ANT9101 ~ ANT9009)
Is it ok? (SUB PBA)
YES
Check RX path any damage
(RFS1000~U1002)
Is it ok?
YES
Check U2016
any damage
(Crack, open, etc), is it ok?
YES
Change the board
YES
END
NO
NO
NO
Resolder or change
Antenna path components
Resolder or change
RX path components
Resolder or change
RX path components
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Page 32
8. Level 3 Repair
8-4-22. LTE 38/40/41 PRx
It is not catching the channel
In normal condition
Check ant path any damage
(ANT9101 ~ ANT9009)
Is it ok? (SUB PBA)
Check RX path any damage
(RFS1000~U1002)
Is it ok?
Check PAM1000~U2016
any damage
(Crack, open, etc), is it ok?
Change the board
YES
YES
YES
YES
NO
NO
NO
Resolder or change
Antenna path components
Resolder or change
RX path components
Resolder or change
RX path components
END
YES
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Page 33
It is not catching the channel
In normal condition
8. Level 3 Repair
8-4-23. WCDMA B1, LTE B1/7/12/13/17/28 PRx
YES
Check ant path any damage
(ANT9101 ~ ANT9009)
Is it ok? (SUB PBA)
YES
Check RX path any damage
(RFS1000~U1002)
Is it ok?
YES
Check U1002~U2016
any damage
(Crack, open, etc), is it ok?
YES
Change the board
YES
END
NO
NO
NO
Resolder or change
Antenna path components
Resolder or change
RX path components
Resolder or change
RX path components
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Page 34
8. Level 3 Repair
8-4-24. WCDMA B1/2/4/5/8, LTE B1/2/3/4/5/7/8/13/17/20/28/38/40/41 DRx
It is not catching the channel
In normal condition
YES
Check ant path any damage
(ANT2002~U2001)
Is it ok?
YES
Check RX path any damage
(U2001~U2012)
Is it ok?
YES
Check U2012~U2016
any damage
(Crack, open, etc), is it ok?
YES
Change the board
YES
END
NO
NO
NO
Resolder or change
Antenna path components
Resolder or change
RX path components
Resolder or change
RX path components
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Page 35
(Crack, open, etc), is it ok?
8. Level 3 Repair
8-4-25. GSM 850/900/DCS/PCS, WCDMA B1/2/4/5/8, LTE B1/2/3/4/5/8/12/13/17/20/28
Tx
It is not catching the channel
In normal condition
YES
Check ant path any damage
(ANT9101 ~ ANT9009)
Is it ok? (SUB PBA)
YES
Check RX path any damage
(RFS1000~U1002)
Is it ok?
YES
Check TX path any damage
(PAM1001~U1002)
Is it ok?
YES
Check U2016, PAM1001
any damage
YES
Change the board
NO
NO
NO
NO
Resolder or change
Antenna path components
Resolder or change
TX path components
Resolder or change
TX path components
Resolder or change
TX path components
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END
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Page 36
(Crack, open, etc), is it ok?
8. Level 3 Repair
8-4-26. LTE B7/38/40/41 Tx
It is not catching the channel
In normal condition
YES
Check ant path any damage
(ANT9101 ~ ANT9009)
Is it ok? (SUB PBA)
YES
Check RX path any damage
(RFS1000~U1002)
Is it ok?
YES
Check TX path any damage
(PAM1000~U1002)
Is it ok?
YES
Check U2016, PAM1000
any damage
NO
NO
NO
NO
Resolder or change
Antenna path components
Resolder or change
TX path components
Resolder or change
TX path components
Resolder or change
TX path components
YES
Change the board
END
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Confidential and proprietary-the contents in this service guide subject to change without prior notice
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