Samsung Core 2 G355h Charging Solution Step By Step Or Jumper Solution

Samsung Core 2 G355h Charging Solution Step By Step Schematic , Diagram , Circuit , Jumper

Samsung Core 2 G355h Charging Solution Step By Step

Step 1

Check the Battery

& TA connection

Insert the battery or TA

Step 2

Check the voltage

VBUS_5.0V_IF>= 5V?

Check C472,C473,ZD405

(short to GND or damage)

Change C472,C473,ZD405

Step 3

Check the U403

(SMD or Damage)?

Change the U403

END

Third Party Solution

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Samsung Core 2 G355h Dead Solution Step By Step

 Samsung Core 2 G355H Dead Solution Schematic , Diagram , Circuit

Samsung Core 2 G355h Dead Solution Step By Step

Step 1 

Check the battery voltage VBAT  >= 3.45 V?

NO

Change the battery

Step 2

Check the current consumption >= 100 mA?

Flash The Phone Download the latest binary. (Re Install Operating System)

Step 3

Check CLK in OSC400 PIN =32.768k Hz?

Change OSC400 or PBA

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Samsung galaxy Grand i9082 Sim Part , Insert SIM card Solution

Samsung galaxy Grand i9082 Sim Part , Insert SIM card Solution  Schematic , Diagram , Circuit 

Samsung galaxy Grand i9082 Sim Part , Insert SIM card Solution Step by Step 

Insert SIM card

Step 1

Check the Pin Soldering
of SIM300, SIM301

Resoldering and recheck

Step 2

Check the SIM Voltage.
(C380, C387) >=
1.8 or 3.0?

Resoldering and recheck
Change to the new SIM card.
If it doesn`t still work SIM card after changeing
the SIM card, Check the UCP300 (Crack etc

END

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Samsung galaxy Grand i9082 No Service , No Network Solution

Samsung galaxy Grand i9082 No Service Solution Schematic , Diagram , Circuit

Samsung galaxy Grand i9082 No Service Solution Step by Step

No service:-

Step 1

Check memu setting

Menu → Apps → Settings → More settings →

Mobile networks → Network mode → GSM/WCDMA(Auto mode)

Step 2

Menu → Phone → Keypad →

*#1234# → check Phone version →

PHONE : I9082XXXX or

PHONE : unknown

Check the connection of RF coaxial cable

(QCB01 @ page2 )

Step 3

Check RFS100 is well soldered

Resolder or Change RFS100

Step 4

Check L100, L101, L144 and

L145 is well soldered

Resolder or Change L100, L101, L144 and L145

Step 5

Change the board

Step 6

END

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Samsung galaxy Grand i9082 cell phone can not Power On Solution

Samsung galaxy Grand i9082 cell phone can not Power On Solution   Schematic , Diagram , Circuit

Samsung galaxy Grand i9082 Dead Solution  Step by Step 

Cell-phone can`t power on:-

Step1

Check the Battery Voltage.
Is it more than 3.6V?

Charging the battery by TA.
If its voltage level is extremely low(under 3.0V),
Change the battery

Step 2

Power-on the phone and check
the power-on sound
or motor vibration.
Sound or vibration is ok?

Change the MEA FRONT-OCTA LCD ASSY

SW re-download and re-booting

Step 3

Try to power on with anyway
jig. If booting is success with
anyway jig,check ANT_505
(soldering crack, open, etc)

Change the ANT_505(Power-key FPCB)
And retry to the power-on operation.
※ Test condition (Power supply 4.0V)

Step4

Check the U400 output voltage

If the output voltage is not satisfied with normal
condition, Change the U400.
※ Each voltage level has ±10% margin.

Step 5

Check the U400 output signal
(ON_SW > 2.8V)

If the output voltage is not satisfied with normal.
condition, Change the UCP300.
※ Each voltage level has ±10% margin.

Step 6

Check the Clock OSC400(C462)
Is that frequency 32.768Khz?

Change the OSC400.
If OSC400 does not still work, Change the U400
This problem is internal oscillator of U400.
※ Test condition (Oscilloscope setting)
: 20.0us.div (time division)

Step 7

check the initial operation

END

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Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band1 (2100) Rx not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band1 (2100) Rx not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band1 (2100) Rx not Working solution Step by Step

Step 1 

Continuous Rx ON
Channel : 10700 CH
Cell power : -60dBm

Step 2

U100 PIN30 ≥ -65dBm?
(L141 using spectrum analyzer)

Resolder L141 or RFS100
Check RFcable
No
U100 PIN30 ≥ -65dBm?
(L141 using spectrum analyzer)

Step 3

U100 PIN27, L132, L108
≥ -68dBm?

Check the U100`s
Ant. selection diagram

Resolder L132, L108
or Change U100

Check Main chip(UCP300)

Step4

F100 PIN1, L102, C128, L106
≥ -75dBm?

Resolder L102, C128, L10
or Change F100

Step5

L129 ≥ -75dBm?

Change U100

Step 6

Check voltage L129, R111,
L127, C161 = about 2.1V

Resolder L129, R111,
L127, C16

Step7

F106 PIN3,4, L128, C162, C166
≥ -75dBm?

Resolder L128, C162, C166
or Change F106

Step8

Change U100

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Samsung Galaxy GT S  Duos S7562   WCDMA 3G Network Band1 (2100)Rx Solution
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Samsung Galaxy GT S Duos S7562  WCDMA 3G Network Band1 (2100) Rx Not receive solution

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Samsung gt s7562 Samsung Galaxy S Duos S7562 DCS/PCS Tx Network not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 DCS/PCS Tx Network not Working solution Schematic, Diagram,Circuit

Samsung gt s7562 Samsung Galaxy S Duos S7562 DCS/PCS Tx not Working solution
Step by Step

Continuous TX ON

CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
DCS CH : 685
PCS CH : 661
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB

Step 1

Check Output power of RFS100
≥ 28.5 dBm ?

Check Main ant. contact & L131,
L103, C122, L107,

Step 2

Check Output power at
R100, C164 ≥ 8dBm ?

Check the Ant.
switching diagram of U100
TP_ANT_SEL

Check GPIO control (UCP300)

Resolder or Change U100

Step 3

U100 normally is operated.

Change U100

Step 4

Check UCP300

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Samsung gt s7562 Samsung Galaxy S Duos S7562 GPS not working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 GPS (Location) not working solution Schematic , Diagram , Circuit

Samsung Galaxy S Duos S7562 GPS (Location) not working solution Step by Step

GPS function on:-

Step 1

Check the voltage of L200,

= 2.7V

Check PM400

Step 2

Check U103
is ok?

Change U103
No

Step 3

Check UCP300

Resolder C250, F201, L201,
C207,F200, C208
GPS function is ok?

Repair is complete

Change the rear case

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Samsung gt s7562 Samsung Galaxy S Duos S7562 Sim Card not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 Sim Card not Working solution Schematic, Diagram,Circuit

Samsung gt s7562 Samsung Galaxy S Duos S7562 Sim Card not Working solution Step By Step

Step 1

Insert & Operate
SIM card

Step 2

SIM Connector
Break down?

Change SIM700

Step 3

R719,R720
= 3.0V

Check PM400(PMIC)

Resolder SIM700

Step 4

Check data,clk,reset line

Resolder or Replace
PM400

Change PBA

JUMPER

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Samsung gt s7562 Samsung Galaxy S Duos S7562 Vibrate not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 Vibrate not Working solution Schematic,Diagram,Circuit

Samsung gt s7562 Samsung Galaxy S Duos S7562 Vibrate not Working solution Step By Step

Step 1

Operate Vibrator

Step 2

Check
Vibrator Motor

Resolder Vibrator Motor

Step 3

Check
D500,C501

Step 4

Resolder or Replace
D500,C501

Step 5

VREG_VIB_3.05V
(C427) = 3.05V?

Check PMIC (PM400)

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Samsung gt s7562 Samsung Galaxy S Duos S7562 Camera not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 Camera not Working solution 

Samsung gt s7562 Samsung Galaxy S Duos S7562 Camera not Working solution Step by Step

Srep1

Operate CAMERA

Step 2

Camera connector
is connected correct?

Re-connect

Step3

C600 = 2.8V
C603 = 1.2V
C601 = 1.8V
C602 = 2.8V

Check PM400(PMIC)

Step 4

5MP_CAM_MCLK
(C621) = 24 MHz ?

Change UCP300

Step 5

Re-assy or replace the came
ra module

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Samsung gt s7562 Samsung Galaxy S Duos S7562 VT Cam not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 VT Cam not Working solution Schematic, Diagram,Circuit

Samsung gt s7562 Samsung Galaxy S Duos S7562 VT Cam not Working solution Step By Step

Step 1

Operate CAMERA

Step 2

Camera connector
is connected correct?

Re-connect

Step 3

C604 = 1.8V
C607 = 2.8V
C606 = 1.8V

Check PM400(PMIC)

Step 4

VT_CAM_MCLK
(C621) = 24 MHz ?

Change UCP30

Step 5

Re-assy or replace the came
ra module

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Samsung Galaxy GT S  Duos S7562 VT Camera  Solution
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Samsung gt s7562 Samsung Galaxy S Duos S7562 GSM 850 Rx Network not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 GSM 850 Rx not Working solution 

Samsung gt s7562 Samsung Galaxy S Duos S7562 GSM 850 Rx Network not Working solution Step By Step

Step 1

Continuous Rx ON
Channel : 190 CH
Cell power : -60dBm

Step 2

U100 PIN30 ≥ -65dBm?
(L141 using spectrum analyzer)

Resolder L141 or RFS100
Check RFcable

Step 3

U100 PIN22, L110, L115
≥ -68dBm?

Check the U100`s
Ant. selection diagram

Check Main chip(UCP300)

Resolder L110, L115
or Change U100

Step 4

PIN6,7
L112, L118, L119 ≥ -75dBm?

Resolder L112, L118, L119

Step 5

Change U100

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Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band1 (2100) Tx not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band1 (2100) Tx not Working solution 

Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band1 (2100) Tx not Working solution Step By Step

Continuous TX ON

(target power 24 dBm)

CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
WCDMA Band1 CH : 9750
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB

Step 1

Check Output power of RFS100
≥ 20dBm ?

Check Main ant. contact & L131,
C122, L103, L107

Step 2

Check Output power at
L101, L100, L132 ≥ 20dBm ?

Check the Ant.
switching diagram of U100
TP_ANT_SEL

Check GPIO control (UCP300)

Resolder or Change U100

Step 3

Check L123
≥ 17dBm ?

Resolder or Change F100, L123

Step 4

Check L103
≥ 5dBm ?

Resolder or Change PAM100, L103

Step5

Check U100

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Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band8 (900) Tx not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band8 (900) Tx not Working solution Schematic, Diagram,Circuit

Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band8 (900) Tx not Working solution Step by Step

Continuous TX ON
Target power 24 dBm)

CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
WCDMA Band8 CH : 2788
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB

Step 1

Check Output power of RFS100
≥ 20dBm ?

Check Main ant. contact & L131,
C108, C122, L107

Step 2

Check Output power at
L108, L141, L142 ≥ 20dBm ?

Check the Ant.
switching diagram of U100
TP_ANT_SEL

Check GPIO control (UCP300)

Resolder or Change U100

Step 3

Check C122
≥ 20dBm ?

Resolder or Change F102, C122

Step 4

Check C121, L113 ≥ 5dBm ?

Resolder or Change
PAM101, C121, L113

Step5

Change U100

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