Samsung J120FN Troubleshooting Manual

8. Level 3 Repair

8-1. Components Layout

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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.

ANT1000

ANT1001

ANT5000

ANT5001

BH4000

BH4001

BH4002

BTC4000

C1001

C1004

C1005

C1006

C1007

C1010

C1012

C1013

C1015

C1016

C1019

C1020

C1021

C1022

C1023

C1027

C1029

C1030

C1031

C1032

C1033

C1034

C1035

C1037

C1038

C1040

C1041

C1042

C1043

C1044

C1045

C1046

C1047

C1048

C1049

C1050

C1051

C1052

C1053

C1054

C1055

C1056

C1057

C1058

C1059

C1060

C1061

C1062

C1063

C1064

C1065

C1066

C1067

C1069

C1070

C1071

C1072

C1073

C1074

C1075

C1076

C1077

C1078

C1079

C1080

C1081

C1082

C1083

C1085

C1087

C1088

C1089

C1090

C1091

C1092

C1093

C1097

C1099

C1100

C1102

C1103

C1105

C1106

C1108

C1110

C1113

C1114

C1115

C1116

C1117

C1118

C1119

C1120

C1122

C1123

C1124

C1125

C1126

C1127

C1129

C1130

C1131

C1132

C1133

C1134

C1135

C1138

C1139

C1140

C1917

C2001

C2002

C2003

C2004

C2006

C2007

C2008

C2009

C2010

C2011

C2012

C2015

C2016

C2017

C2020

C2021

C2022

C2025

C2026

C2031

C2032

C2033

C2034

C2035

C2036

C2037

C2038

C2039

C2040

C2041

C2042

C2043

C2044

C2045

C2046

C2047

C2048

C2049

C2050

C2052

C2054

C2056

C2058

C2061

C2064

C2065

C2067

C2071

C2072

C2073

C2074

C2075

C2077

C2079

C2081

C2082

C2083

C2084

C2085

C2086

C2089

C2090

C2091

C2092

C2093

C2094

C2095

C2959

C2960

C2965

C2966

C3002

C3004

C3005

C3006

C3007

C3008

C3009

C3010

C3012

C3013

C3016

C3018

C3019

C3020

C3022

C3023

C3024

C3025

C3026

C3027

C3028

C3029

C3030

C3031

C3032

C3035

C3037

C3038

C3039

C3041

C3044

C3045

C3046

C3049

C3050

C3051

C3052

C3053

C3054

C3055

C3056

C3057

C3058

C3059

C3060

C3061

C3062

C3063

C3064

C3065

C3066

C3067

C3068

C3069

C3072

C4000

C4002

C4003

C4005

C4006

C4008

C4009

C4010

C4011

C4012

C4013

C4014

C4015

C4016

C4017

C4018

C4019

C4020

C4021

C4024

C4025

C4026

C4028

C4029

C4031

C4032

C4033

C4034

C4037

C4038

C4039

C4042

C4043

C4044

C4045

C4048

C4049

C4050

C4051

C4052

C4053

C4055

C4056

C4057

C4058

C4059

C4060

C4061

C4062

C4063

C4064

C4065

C4067

C4068

C4069

C4070

C4071

C4076

C4077

C4078

C4079

C4080

C4081

C4082

C4083

C4084

C4085

C4086

C4087

C4088

C4089

C4090

C4091

C4092

C4093

C4094

C5001

C5002

C5003

C5004

C5005

C5007

C5008

C5009

C5011

C5012

C5013

C5014

C5015

C5016

C5017

C5020

C5022

C5023

C5024

C5026

C5027

C5029

C5031

C5033

C5034

C5036

C5037

C5038

C5039

C5040

C5043

C5044

C5045

C5046

C5047

C5049

C5051

C5053

C5054

C6000

C6005

C6008

C6009

C6011

C6012

C6013

C6014

C6015

C6016

C6017

C6018

C6019

C6022

C6023

C6024

C6025

C6026

C6027

C6028

C6029

C6031

C6032

C6033

C6034

C6036

C6037

C6038

C6039

C6040

C6041

C6043

C6044

D4000

D5000

EAR5000

F1000

F1003

F1004

F1005

F1006

F2000

F2002

F2003

F2004

F2006

F2007

F2900

HDC6000

HDC6001

IFC4000

L1000

L1001

L1002

L1003

L1004

L1005

L1006

L1007

L1009

L1010

L1011

L1012

L1014

L1016

L1017

L1018

L1019

L1020

L1021

L1022

L1023

L1024

L1025

L1026

L1027

L1028

L1029

L1030

L1031

L1032

L1033

L1035

L1036

L1038

L1039

L1040

L1041

L1042

L1043

L1045

L1048

L1049

L1050

L1051

L1052

L1053

L1054

L1057

L1058

L2001

L2002

L2004

L2005

L2006

L2007

L2008

L2009

L2010

L2011

L2012

L2013

L2014

L2016

L2017

L2019

L2021

L2022

L2024

L2025

L4001

L4002

L4003

L4004

L5002

L5003

L5004

L5005

L5006

L5007

L5008

L5009

L5010

L5011

L5012

L5014

L5017

L6000

L6001

L6002

L6003

L6004

OSC2000

OSC2001

PAM1001

R1000

R1001

R1003

R1004

R1005

R1006

R1007

R1008

R1009

R1010

R1011

R1012

R2000

R2001

R2002

R2003

R2004

R2005

R2006

R2007

R3005

R3006

R3007

R3008

R3009

R3010

R3011

R3012

R3013

R3014

R3015

R3016

R3017

R3018

R3019

R3020

R3024

R3026

R3027

R3029

R3030

R3031

R3033

R3034

R3035

R3036

R3037

R3040

R3041

R3043

R3044

R4001

R4002

R4003

R4004

R4005

R4006

R4007

R4008

R4009

R4010

R4011

R4014

R4015

R4016

R4017

R4022

R4023

R4024

R4025

R4026

R4027

R4028

R4030

R4031

R5000

R5001

R5002

R5006

R5018

R5028

R5030

R5034

R5035

R5036

R5038

R5039

R5043

R5045

R5046

R5048

R5049

R5051

R5054

R5055

R6000

R6002

R6006

R6007

R6008

R6009

R6010

R6012

R6014

R6015

R6016

R6017

R6018

R6019

R6020

R6021

R6022

R6024

R6027

R6029

RFS1000

SIM6000

SIM6001

SPK5000

TAC5000

TAC5001

TAC5002

TCX1000

TH3000

TH4000

TP_ACC_INT

TP_BT_PWR_ON

TP_BT_UART_CTS_N

TP_BT_UART_RTS_N

TP_BT_UART_RXD

TP_BT_UART_TXD

TP_C6000

TP_C6001

TP_C6002

TP_C6003

TP_C6004

TP_GPS_RTS

TP_GPS_RXD

TP_GPS_TXD

TP_LCD_MIPI_CLK_N

TP_LCD_MIPI_CLK_P

TP_LCD_MIPI_D6000

TP_LCD_MIPI_D6001

TP_LCD_MIPI_D6002

TP_LCD_MIPI_D6003

TP_NFC_EN

TP_NFC_FIRM

TP_NFC_IRQ

TP_RF0_SPI_RST

TP_WLAN_D2000

TP_WLAN_HOST_WAKE

TP_WLAN_PWR_ON

TP2000

TP2003

TP2004

TP2005

TP2006

TP2007

TP2009

TP2010

TP3003

TP4000
TP4002

TP4004
TP4006

TP4007

TP4008

TP4011

TP6000

U1000

U1001

U1002

U1003

U1006

U1008

U1009

U1010

U2000

U2001

U2002

U2003

U2004

U2006

U2008

U2010

U2013

U2014

U2018

U2019

U2021

U2022

U2023

U2024

U2025

U2026

U2027

U2028

U2029

U2031

U2033

U2034

U2035

U2037

U2038

U2900

U2905

U4002

U4003

U5000

U5003

U6000

U6001

U6002

U6003

U6006

U6007

U6008

U6009

U6010

U6012

U6013

U6014

UCP3000

UME5000

VR4000

ZD4000

ZD4001

ZD5000

ZD5002

ZD5004

ZD5005

ZD5007

ZD5008

ZD5009

ZD5010

ZD5011

ZD5012

ZD5013

ZD5014

ZD6000

ZD6001

ZD6004

8. Level 3 Repair

POT

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ANT5002

ANT5003

ANT5004

ANT5005

C1136

CN6000

L5001

L5015

L5016

MIC5000

SUS3000

SUS3001

SUS3002

TP_LPDDR_CKN

TP_LPDDR_CKP

TP_PM_PERI2000

TP4005

U6011

8. Level 3 Repair

MOTTOB

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8. Level 3 Repair

8-2. Block Diagram

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8. Level 3 Repair

8-3. Flow Chart of Troubleshooting

Oscilloscope Digital Multimeter

Power Supply + driver, ESD Safe Tweezer

8960 & Spectrum Analyzer Soldering iron

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s o

g

8. Level 3 Repair

8-4. Power On

Mobile phone does not power on.

Check the Battery

Is it more than 3.8V?

Voltage.

Yes

Power-on the phone,

check the power-on

or motor Vibration.

Check the PWR_KEY

(soldering crack, open,

Check the signal of

AP_PS_HOLD = 1.8V

Check the

Clock OSC4000

Is the frequency

check the initial operation

sound

i

etc)

END

k?

No

Yes

Yes

Yes

Yes

No

If its voltage level is extremely low(under 3.0V),

Yes

No

Check the output voltage of U4000

No

No

(C4014, C4018 >1.35V, C4019 > 1.95V, L4000 > 1.1V, L4001 > 1.35V,

L4002 > 1.95V)

If the output voltage is not normal, Change the U4000

※ Each volta

Replace the OSC4000.
※ Test condition (Oscilloscope setting)

: 20.0us.div (time division)

Charging the battery by TA.

Change the battery.

Change the FRONT-LCD ASSY

Resolder or replace TAC5000

e level has ±10% margin.

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)

8. Level 3 Repair

8-4-2. Initial

Initial Failure.

Yes

Re-download latest

SW on the mobile

Re Check "8-4-1 Power on"

Trouble shooting process

Change UCP3000

Change PBA

phone.

END

Abnormal

Yes

No

NO

Check the OSC4000 (Crack, open etc.)

Check the U4000(Crack etc

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8. Level 3 Repair

8-4-3. No Service

Check menu setting

Menu → applications → setting → network connections →
more networks → mobile networks → network mode → setting is auto connect ?

Home screen → Phone → Keypad

→ *#1234# → check Phone version
→ CP : G120FXXXX or unknown

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No service

Yes

CP : unknown

Check the components of

Antenna Path. Is it ok?

Yes

Check VREF

VREF(C1098) = 1.8

Yes

Change the PBA

Yes

END

CP : G120FXXXX

Check the Main Antenna exists or not.

No

No

Resolder the components

Replace the TCX1000

8. Level 3 Repair

8-4-4. Sim Part

Insert SIM card

Is SIM socket ok?

Is SIM/SD assy

well connected to

main board?

Check the SIM

Voltage.

C6042 >= 1.8V?

END

Yes

Yes

Yes

Yes

No

Reassemble SIM/SD assy and still SIM does not work,

replace SIM/SD assy

No

Change to the new SIM card.
If it doesn`t still work SIM card after changeing
the SIM card, Check the UCP3000 (Crack etc)

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ging

8. Level 3 Repair

8-4-5. Charging Part

TA / USB Insert

Checking Volt at

C4067 = 5V?

Checking Volt at

C4051 = 3.3V?

Resolder or
Replace U4000
and then Check
Char

or not

END

Yes

Yes

Yes

Yes

- First of all, Please check the battery status.

No

No

Reconnect TA or USB

Swap the Sub PBA

Resolder or Replace U4000

or

No

Check The IC's around U4000

or

Swap the Main PBA.

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y

8. Level 3 Repair

8-4-6. Microphone Part

Check microphone function

in voice call reciever mode

or in Voice Recording mode

Check the MIC on

PBA is placed for

damage

an

Check the L5004

soldering status

and Check the

voltage at

L5004 = 2.8V

END

Something Wrong

No

Yes

Yes

No

Resolder or replace MIC5000

Resolder or replace U4001

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8. Level 3 Repair

8-4-7. Speaker Part

Check speaker function.

Play MP3

with maximum volume level.

Check the

connection of

Speaker module

Check the signals

on L5014, L5017

END

Something Wrong

No

Yes

Yes

no

Replace speaker or replace speaker module

Resolder or replace L5014, L5017

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8. Level 3 Repair

8-4-8. Receiver Part

Check receiver function

in voice call receiver mode

Check the receiver

& EAR Jack

module for any

damage (tear in

FPCB, crack, etc)

Check the signals

on L5015, L5016

OK?

END

Something Wrong

No

Yes

Yes

no

Reconnect or Replace receiver module

Resolder or replace L5015, L5016

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8. Level 3 Repair

8-4-9. LCD

.

LCD is still off after PWR ON

Check the

connection of

HDC6000

check the voltage

of C6004=3.0V?

C6003=1.8V?

Replace Front Assy

END

Yes

Yes

Yes

Yes

No

No

Reassemble FRONT assy

Resolder C6003, C6004

or Replace the U6007

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8. Level 3 Repair

8-4-10. TSP

.

Touch Screen does not work

Check the

connection of

HDC6000

check the voltage

of C6005=3.3V?

Replace Front Assy

END

Yes

Yes

Yes

Yes

No

No

Reassemble FRONT assy

Resolder C6003, C6004

or Replace the U6006 and U6008

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8. Level 3 Repair

8-4-11. 5M CAMERA

.

Main Camera function does not work

Check the Camera

connector on

Main PBA

Check the voltage

C6012 = 1.8 V

C6008 = 1.2V
C6013 = 2.8V

C6011 = 2.8 V

Replace the camera

module

END

Yes

Yes

Yes

Yes

No

Reconnect the 5M Cam module on CAM6000

No

Resolder C6008, C6011, C6012, C6013

or Replace the U6003

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8. Level 3 Repair

8-4-12. 2M CAMERA

.

Front Camera function does not work

Check the Camera

connector on

Main PBA

Check the voltage

C6023 = 2.8V
C6024 = 1.8V

Replace the camera

module

END

Yes

Yes

Yes

Yes

No

Reconnect the 2M Cam module on HDC6001

No

Resolder C6023, C6024

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)

8. Level 3 Repair

8-4-13. GSM 850 / WCDMA 850 / LTE B5 RX

It is not catching the channel

Check ANT PATH

any damage

(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Rx path

C1027,L1020,L1018

Check U1001,U1006

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

END

No

Yes

No

No

Yes

Yes

Resolder or change

Antenna path components

Resolder or change

Rx path components

Resolder or change

U1001,U1006 components

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)

8. Level 3 Repair

8-4-14. GSM 900 / WCDMA 900 / LTE B8 RX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Rx path

C1045,L1024

Check U1001,U1006

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

END

No

Yes

No

No

Yes

Yes

Resolder or change

Antenna path components

Resolder or change

Rx path components

Resolder or change

U1001,U1006 components

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)

8. Level 3 Repair

8-4-15. GSM 1800 / LTE B3 RX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Rx path

C1019,L1017,L1016

Check U1001,U1006

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

END

No

Yes

No

Yes

No

Yes

Resolder or change

Antenna path components

Resolder or change

Rx path components

Resolder or change

U1001,U1006 components

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)

8. Level 3 Repair

8-4-16. GSM 1900 / WCDMA 1900

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Rx path

C1007,L1012,L1006

Check U1001,U1006

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

END

No

Yes

No

Yes

No

Yes

Resolder or change

Antenna path components

Resolder or change

Rx path components

Resolder or change

U1001,U1006 components

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)

8. Level 3 Repair

8-4-17. WCDMA 2100 / LTE B1 RX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Rx path

C1027,L1020,L1018

Check U1001,U1006

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

END

No

Yes

No

Yes

No

Yes

Resolder or change

Antenna path components

Resolder or change

Rx path components

Resolder or change

U1001,U1006 components

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)

8. Level 3 Repair

8-4-18. LTE B20 RX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

L1009

Check Rx path

C1056,C1060,L1028

Is it ok?

Check U1001,U1006

any damage

(Crack, open, etc)

Change the board

END

No

Yes

No

Yes

No

Resolder or change

Antenna path components

Resolder or change

Rx path components

Yes

Resolder or change

U1001,U1006 components

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.

)

8. Level 3 Repair

8-4-19. GSM850/GSM900 TX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Tx path

L1019,C1033,C1031

L1005,C1004

U1001,U1006,PAM1000

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

Check

END

No

Yes

No

Yes

No

Yes

Resolder or change

Antenna path components

Resolder or change

Tx path components

Resolder or change

U1001,U1006,PAM1000 components

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.

)

8. Level 3 Repair

8-4-20. GSM1800/GSM1900 TX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Tx path
C1047,C1048,L1025
C1049,L1001,L1000

U1001,U1006,PAM1000

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

Check

END

No

Yes

No

Yes

No

Yes

Resolder or change

Antenna path components

Resolder or change

Tx path components

Resolder or change

U1001,U1006,PAM1000 components

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.

)

8. Level 3 Repair

8-4-21. WCDMA2100/LTE B1 TX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Tx path
C1047,C1048,L1025
C1049,C1065,L1031

U1001,U1006,PAM1000

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

Check

END

No

Yes

No

Yes

No

Yes

Resolder or change

Antenna path components

Resolder or change

Tx path components

Resolder or change

U1001,U1006,PAM1000 components

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.

)

8. Level 3 Repair

8-4-22. WCDMA1900 TX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

L1009

No

Check Tx path

C1047,C1048,L1025

C1049,C1054,C1051,C1

055

Is it ok?

Yes

Check

U1001,U1006,PAM1000

any damage

(Crack, open, etc)

No

Change the board

END

Yes

Resolder or change

Antenna path components

No

Resolder or change

Tx path components

Yes

U1001,U1006,PAM1000 components

Resolder or change

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.

)

8. Level 3 Repair

8-4-23. LTE B3 TX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

L1009

Check Tx path
C1047,C1048,L1025
C1049,C1072,L1033

Is it ok?

Check

U1001,U1006,PAM1000

any damage

(Crack, open, etc)

Change the board

END

No

Yes

No

Yes

No

Resolder or change

Antenna path components

Resolder or change

Tx path components

Yes

U1001,U1006,PAM1000 components

Resolder or change

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.

)

8. Level 3 Repair

8-4-24. WCDMA850/LTE B5 TX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Tx path

L1019,C1033,C1031

L1026,C1043

U1001,U1006,PAM1000

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

Check

END

No

Yes

No

Yes

No

Yes

Resolder or change

Antenna path components

Resolder or change

Tx path components

Resolder or change

U1001,U1006,PAM1000 components

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.

)

8. Level 3 Repair

8-4-25. WCDMA900/LTE B8 TX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

Check Tx path

L1019,C1033,C1031

L1022,C1032

U1001,U1006,PAM1000

any damage

(Crack, open, etc)

Change the board

L1009

Is it ok?

Check

END

No

Yes

No

Yes

No

Yes

Resolder or change

Antenna path components

Resolder or change

Tx path components

Resolder or change

U1001,U1006,PAM1000 components

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.

)

8. Level 3 Repair

8-4-26. LTE B20 TX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

L1009

Check Tx path

L1019,C1033,C1031

,C1063

Is it ok?

Check

U1001,U1006,PAM1000

any damage

(Crack, open, etc)

Change the board

END

No

Yes

No

Yes

No

Resolder or change

Antenna path components

Resolder or change

Tx path components

Yes

U1001,U1006,PAM1000 components

Resolder or change

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.

)

8. Level 3 Repair

8-4-27. LTE B7 TX

It is not catching the channel

Check ANT PATH

any damage
(ANT1000,R1012,ANT1001,
C1124,U6013,L1015,C1018,
U1000,C1038,C1006,L1007,

C1009,RFS1000,L1013,
C1010,L1008,CPL1000,

L1009

Check Tx path

C1115,L1054,L1050

L1051,C1119,C1120,C1

110,L1044,L1041,

L1042

Is it ok?

Check

U1001,U1006,PAM1001

F1003

any damage

(Crack, open, etc)

Change the board

END

No

Yes

No

Yes

No

Resolder or change

Antenna path components

Resolder or change

Tx path components

Yes

Resolder or change

U1001,U1006,PAM1001,F1003 components

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.

8. Level 3 Repair

8-4-28. BT/WLAN

BT/WIFI does not work

Check ANT PATH

any damage

(U2011,L2015,C2037,

L2011,L2010,L2013)

Check RF path

L2009,C2036,L2014,

C2039

Is it ok?

Check U2008,OSC2001,

R2001,F2000
any damage

(Crack, open, etc)

Change the board

END

No

Yes

No

Yes

No

Resolder or change

Antenna path components

Resolder or change

RF path components

Yes

U2008,OSC2001,R2001,F2000 components

Resolder or change

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.

8. Level 3 Repair

8-4-29. GPS

GPS does not work

Check ANT PATH

any damage

(U2004,L2006,C2022,

L2004,C2021)

Check RF path

C2020,L2003,C2019,

L2002

Is it ok?

Check U2005,OSC2000,

U2000,U2001,U2003

any damage

(Crack, open, etc)

Change the board

END

No

Yes

No

Yes

No

Resolder or change

Antenna path components

Resolder or change

RF path components

Yes

U2005,OSC2000,U2000,U2001,U2003

Resolder or change

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.

8. Level 3 Repair

8-4-30. FM RADIO

FM RADIO does not work

Check the volume of

handset.

Check the earphone.

Is it abnormal?

Check RF path

L2007,ZD5005,L5010,L5

007,C5041,L5013

Is it ok?

Check U2008,EAR5000

any damage

(Crack, open, etc)

Change the board

END

No

Yes

No

Yes

Change the speaker or earphone

No

Resolder or change

RF path components

Yes

Resolder or change

U2008,EAR5000 components

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.

8. Level 3 Repair

8-5. Service Schematics

- NC Point(Top View)

UCP3000 (AP)

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.