Samsung Electronics PBA Repair Guide [SGH-I900]. 2/37 Contents 1. PBA Diagram 2. Trouble Shooting 2-1. No Power 2-2. Lockup / Reset 2-3. SIM Card Failed.

Samsung Electronics

PBA Repair Guide[SGH-I900]

PBA Repair Guide[SGH-I900]

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Contents

1. PBA Diagram

2. Trouble Shooting

2-1. No Power

2-2. Lockup / Reset

2-3. SIM Card Failed

2-4. Camera Failed

2-5. No Vibration

2-6. Bluetooth Searching Failed

2-7. No Charging

3. Appendix

3-1. How to check the voltage and frequency

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1. PBA Diagram

TOP

Diagram Appearance

SGH-I900

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1. PBA Diagram

Bottom

Diagram Appearance

SGH-I900

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2-1. No Power (PDA)

Trouble shooting

Power-on-current>= 100mA

Power-on-current>= 100mA U304 P1 = 4V U304 P1 = 4V

C668 = 3VC665, C674 = 1.8VC667, C677 = 2.6V

C668 = 3VC665, C674 = 1.8VC667, C677 = 2.6V

Input the power(3.8V)

Input the power(3.8V)

Download S/W(PDA)

Download S/W(PDA)

Check U304Check U304 Check U605Check U605

※ It’s a general case. It cannot be available on the special case.

Check UCP600Check UCP600YY

NN

YY

NN

YY

NN

SGH-I900

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2-1. No Power (PDA)1. Input the power 3.8V

2. Check the power-on-current >= 100mA

- If not : Download PDA software (refer to 2-2. Lockup/Reset)

3. Check the voltage U304 Pin number 1 = 4V

- If not : Check the U304 (crack, open, short, etc)

4. Check the Voltage

1) C668 = 3V

2) C665, C674 = 1.8V

3) C667, C677 = 2.6V

- If not : Check the U605 (crack, open, short, etc)

5. There is no problem from 1 to 4, check the UCP600

SGH-I900

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2-1. No Power (PDA)

Picture 2-1-3, 2-1-4, 2-1-5Picture 2-1-3, 2-1-4, 2-1-5

SGH-I900

●●

UCP600UCP600

U304U304

11

C668C668

C665C665 C674C674C667C667

C677C677

U605U605

●●

●●●●

●●

●●

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2-1. No Power (PDA)

U304 Pin number 1 C668

Voltage Div : 1V, Time Div : 1 ㎳ Voltage Div : 1V, Time Div : 1 ㎳

Scope 2-1-3, 2-1-4Scope 2-1-3, 2-1-4

SGH-I900

3V3V4V4V

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2-1. No Power (PDA)

C665, C674 C667, C677

Voltage Div : 1V, Time Div : 1 ㎳ Voltage Div : 1V, Time Div : 1 ㎳

Scope 2-1-4Scope 2-1-4

1.8V1.8V

SGH-I900

1.4V1.4V

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2-1. No Power (Phone)

Trouble shooting

Power-on-current>= 100mA

Power-on-current>= 100mA U201 P2 = 1.8V U201 P2 = 1.8V D300 P2 = 1.8VD300 P2 = 1.8V

Input the power(3.8V)

Input the power(3.8V)

Download S/W(Phone)

Download S/W(Phone)

Check U201Check U201 Check UME201Check UME201

※ It’s a general case. It cannot be available on the special case.

YY

NN

YY

NN

YY

NN

SGH-I900

OSC102 = 32kHzOSC102 = 32kHz

CheckOSC102 or UCP600

CheckOSC102 or UCP600

Check U301Check U301YY

NN

D300 P3 = 1.8VD300 P3 = 1.8V

Check D300Check D300

YY

NN

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2-1. No Power (Phone)

1. Input the power 3.8V

2. Check the power-on-current >= 100mA

- If not : Download Phone software (refer to 2-2. Lockup/Reset)

3. Check the voltage

1) U201 Pin number 2 = 1.8V (Low)

- If not : Check the U201 (crack, open, short, etc)

2) D300 Pin number 2 = 1.8V (Low)

- If not : Check the UME201 (crack, open, short, etc)

3) D300 Pin number 3 = 1.8V (Low)

- If not : Check the D300 (crack, open, short, etc)

SGH-I900

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2-1. No Power (Phone)

4. Check the OSC102 = 32kHz

- If not : Check the OSC102 or UCP600

5. If there is no problem from 1 to 4, check the U301

(crack, open, short, etc)

SGH-I900

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2-1. No Power (Phone)

Picture 2-1-3, 2-1-4, 2-1-5Picture 2-1-3, 2-1-4, 2-1-5

SGH-I900

UME201UME201

●●U201U201

22

●●2, 32, 3

D300D300●●

UCP600UCP600

OSC102OSC102

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2-1. No Power (Phone)

U201 P2, D300 P2, 3 OSC102

Voltage Div : 1V, Time Div : 1 ㎳ Voltage Div : 1V, Time Div : 20 ㎲

Scope 2-1-3, 2-1-4Scope 2-1-3, 2-1-4

32kHz32kHz

SGH-I900

1.8V1.8V

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2-2. Lockup / Reset

Trouble shooting

DownloadCompletedDownloadCompleted

Lockup or reset(Same as declared)

Lockup or reset(Same as declared)

Lockup/Reset(Omnia screen)Lockup/Reset

(Omnia screen)

Check UME200(Phone)

Check UME200(Phone)

Repeat thelockup/reset test

Repeat thelockup/reset test

※ It’s a general case. It cannot be available on the special case.

YY

NN

YY

NN

SGH-I900

Lockup/Reset(Phone off

after power on)

Lockup/Reset(Phone off

after power on)

Use a PDA J-TAGUse a PDA J-TAG

Use a Phone J-TAGUse a Phone J-TAG

Downloadthe latest PDA S/W

Downloadthe latest PDA S/W

Downloadthe latest Phone S/W

Downloadthe latest Phone S/W

Check UCP600(PDA)

Check UCP600(PDA)

NN

Check UCP200(Phone)

Check UCP200(Phone)

Check UCP600(PDA)

Check UCP600(PDA)

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2-2. Lockup / Reset

1. Use a J-TAG to enable USB

- Lockup/Reset on Omnia screen : Use a PDA J-TAG

- Phone off after power on : Use a Phone J-TG

2. Download the latest software

- If download is not completed

: Check the UCP600 (PDA)

(crack, open, short, etc)

: Check the UME200 (Phone)

(crack, open, short, etc)

Picture 2-2-2Picture 2-2-2

SGH-I900

UCP600UCP600UCP200UCP200

UME200UME200

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2-2. Lockup / Reset

- If download is completed but it still has the same defect

: Check the UCP600 (PDA)

(crack, open, short, etc)

: Check the UCP200 (Phone)

(crack, open, short, etc)

- If download is completed and you cannot find the same defect

: Repeat the lockup/reset test declared originally

SGH-I900

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2-3. SIM Card Failed

Trouble shooting

Pin 1, 2, 4 = 3VPin 3 = 3V ClockPin 1, 2, 4 = 3VPin 3 = 3V Clock

Check the 6-pinsof SIM socket

Check the 6-pinsof SIM socket

Clean or changeSIM socket

Clean or changeSIM socket

Check U301or UCP200

Check U301or UCP200

※ It’s a general case. It cannot be available on the special case.

There is durstor damaged

There is durstor damaged

NN

Input the power(3.8V)

Input the power(3.8V)

YY

NN

SGH-I900

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2-3. SIM Card Failed

1. Check the 6-pins of SIM socket

- If there is a durst : Clean the pins

- If it is damaged : Change the SIM socket

2. Input the power 3.8V

3. Check the voltage

1) Pin number 1, 2, 4 = 3V

2) Pin number 3 = 3V Clock

- If not : Check the U301 or UCP200

(crack, open, short, etc)

※ Check the voltage when you input the power on the PBA.

Picture 2-3-3Picture 2-3-3

SGH-I900

●●●●●●

●●

1 2 31 2 3

44

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2-3. SIM Card Failed

Pin number 1, 2, 4 Pin number 3

Voltage Div : 1V, Time Div : 50 ㎳ Voltage Div : 1V, Time Div : 50 ㎳

Scope 2-3-3Scope 2-3-3

3V3V

1.9V1.9V

3V Clock3V Clock

1.9V Clock1.9V Clock

SGH-I900

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2-4. Camera Failed

Trouble shooting

※ It’s a general case. It cannot be available on the special case.

Clean or ChangeHDC500

Clean or ChangeHDC500

There is durstor damaged

There is durstor damagedCheck HDC500Check HDC500 U512 P3 = 3VU512 P3 = 3V

YY

NN

SGH-I900

Check UCP600Check UCP600

YY

NN

C535 = 1.2VC535 = 1.2V

Check U512Check U512

NN

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2-4. Camera Failed

1. Check the HDC500

- If there is a durst or damaged : Clean or change the HDC500

2. Connect a camera and input the power 3.8V

3. Check the voltage U512 Pin number 3= 3V

- If not : Check the UCP600 (crack, open, short, etc)

4. Check the voltage C535 = 1.2V

- If not : Check the U512 (crack, open, short, etc)

※ Check the voltage during camera entering mode.

- LCD, TSP and camera must be connected to PBA.

- Input the power and press key number *#0*# → 7

SGH-I900

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2-4. Camera Failed

Picture 2-4-3, 2-4-4Picture 2-4-3, 2-4-4

SGH-I900

UCP600UCP600

●●U512U512

33 C535C535

HDC500HDC500

●●

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2-4. Camera Failed

U512 Pin number 3 C535

Voltage Div : 1V, Time Div : 1 ㎳ Voltage Div : 1V, Time Div : 1 ㎳

Scope 2-4-3, 2-4-4Scope 2-4-3, 2-4-4

SGH-I900

1.2V1.2V

3V3V

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2-5. No Vibration

Trouble shooting

※ It’s a general case. It cannot be available on the special case.

Check the HDC500Check the HDC500

Clean or ChangeHDC500

Clean or ChangeHDC500

There is durstor damaged

There is durstor damaged U510 P1 = 3VU510 P1 = 3V

Check U609Check U609

NN

Connect a motorInput the power

Vibration on

Connect a motorInput the power

Vibration on

YY

NNC541 = 3VC541 = 3V

Check U510Check U510

NN

SGH-I900

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2-5. No Vibration

1. Check the HDC500

- If there is a durst or damaged : Clean or change the HDC500

2. Connect a motor, input the power (3.8V), Vibration on

3. Check the voltage U510 Pin number 1 = 3V

- If not : Check the U609 (crack, open, short, etc)

4. Check the voltage C541 = 3V

- Check the U510 (crack, open, short, etc)

※ Check the voltage during vibrating.

- LCD, TSP and vibrator must be connected to PBA.

- Input the power and press key number *#0*# → 5

SGH-I900

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2-5. No Vibration

Picture 2-5-1, 2-5-3, 2-5-4Picture 2-5-1, 2-5-3, 2-5-4

U510, U541

Voltage Div : 1V, Time Div : 1 ㎳

Scope 2-5-3, 2-5-4Scope 2-5-3, 2-5-4

3V3V

SGH-I900

HDC500HDC500

U510U510

11 ●●

U609U609

C541C541

●●

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2-6. Bluetooth Searching Failed

Trouble shooting

※ It’s a general case. It cannot be available on the special case.

SGH-I900

CheckL119, ANT103

CheckL119, ANT103

Resolder or changeResolder or change

There is problem(crack, open)

There is problem(crack, open)

U101 P6 = 3.3VU101 P5 = 1.8VU101 P6 = 3.3VU101 P5 = 1.8V

Check U101Check U101

YY

NN

Input the powerBluetooth on

Search devices

Input the powerBluetooth on

Search devices

YY

NN

OSC101 = 26MHzOSC101 = 26MHz

Check OSC101Check OSC101

YY

NN

Check MOD100Check MOD100

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2-6. Bluetooth Searching Failed

1. Check the L119, ANT103 (crack, open, etc)

- If there is a problem : Resolder or change it

2. Input the power (3.8V), Bluetooth on, Search devices

3. Check the voltage U101 Pin number 6 = 3.3V, Pin number 5 =

1.8V

- If not : Check the U101 (crack, open, short, etc)

4. Check the clock OSC101 = 26MHz

- If not : Check the OSC101 (crack, open, short, etc)

5. If there is no problem from 1 to 4, check the MOD100

(crack, open, short, etc)

SGH-I900

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2-6. Bluetooth Searching Failed

※ Check the voltage during searching devices

- LCD and TSP must be connected to PBA.

- Insert a SIM card and input the power.

- Activate on the bluetooth and search devices.

SGH-I900

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2-6. Bluetooth Searching Failed

Picture 2-6-1, 2-6-3, 2-6-4, 2-6-5Picture 2-6-1, 2-6-3, 2-6-4, 2-6-5

SGH-I900

●● ●●

U101U101

L119L119

ANT103ANT103

MOD100MOD100

OSC101OSC101

5,65,6

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2-6. Bluetooth Searching Failed

U101 Pin number 6 U101 Pin number 5

Voltage Div : 1V, Time Div : 1 ㎳ Voltage Div : 1V, Time Div : 1 ㎳

Scope 2-6-3Scope 2-6-3

SGH-I900

1.8V1.8V3.3V3.3V

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2-6. Bluetooth Searching Failed

OSC101

Voltage Div : 1V, Time Div : 20 ㎱

Scope 2-6-4Scope 2-6-4

SGH-I900

26MHz26MHz

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2-7. No Charging

Trouble shooting

※ It’s a general case. It cannot be available on the special case.

Connect TAto the power supply

Connect TAto the power supply U303 P10 = 5VU303 P10 = 5V

CheckU303 or IFC400

CheckU303 or IFC400

Input the power(5V)

Input the power(5V)

NN

Check UCP600Check UCP600YY

SGH-I900

Current = 400 ~ 600mACurrent = 400 ~ 600mA

Check U301Check U301

NN

YY

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2-7. No Charging1. Connect TA to the power supply and input the power (5V)

2. Insert a TA to PBA

3. Check the current = 400 ~ 600mA

- If not : Check the U301

(crack, open, short, etc)

4. Check the voltage U303 Pin 10 = 5V

- If not : Check the U303 or IFC400

5. If there is no problem from 1 to 4,

check the UCP600 (crack, open, short, etc)

※ Check the voltage during charging.

- TA can be connected to power supply must be prepared.

TATA

Picture 2-7-1, 2-7-2Picture 2-7-1, 2-7-2

Insert to PBAInsert to PBA

SGH-I900

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2-7. No Charging

Picture 2-7-4, 2-7-5Picture 2-7-4, 2-7-5

U303 Pin number 10

Voltage Div : 1V, Time Div : 1 ㎳

Scope 2-7-4Scope 2-7-4

5V5V

SGH-I900

IFC400IFC400●●U303U303 1010

UCP600UCP600

U301U301

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3-1. How to check the voltage and frequency

Equipment : Oscilloscope (Bandwidth : more than 500MHz)

PBA condition : Power on by using power supply

Ground the scope

Put a scope to the point you want to check

Input the power

Input the power

Ground

Ground

Put a scopePut a scope