Samsung B7722 Disassembly and Assembly Instructions

Level

8.

Block Diagram

8-1.

ONKEY

CHARGER

LCD

3.2”WQVGA

3.2”WQVGA WTSP

WTSP

HapticMotor

Repair

3

Master Memory

4G x 1G

NAND / SDRAM

Keypad

SIM

T-Flash

Master PMU

(PCF50623)

(PCF50617)

(PCF50623)

(PCF50617)

Mot/Touch IC

(ISA2000)

Acc Sensor

KR3DF

KR3DM

Camera

5M AF

CIF CAM

SWITCH

common I2C

Master RF

(HSDPA)

AERO4229

Master B/B

(PNX6709)

UART2

UART2 UART2

UART2

GPIO

GPIO GPIO

GPIO

EXTINT

EXTINT EXTINT

EXTINT

GPIO

GPIO GPIO

GPIO

EXTINT

EXTINT EXTINT

EXTINT

EAR

Ana In

RCV

RCV SPK EAR

USB

MIC1 MIC2 UART1

USB

SPI2

SPI1

Data Communication

Interrupt for data

Interrupt for debugging

FM

TEA5991

WIFI(SWL-10)

BT(BC6)

PCM

SWITCH

Audio

Amp

SWITC

SWITCH

Slave RF

QS520

Slave B/B

(PNX6608)

UART2

UART2 UART2

UART2

EXTINT

EXTINT EXTINT

EXTINT

GPIO

GPIO GPIO

GPIO

EXTINT

EXTINT EXTINT

EXTINT

GPIO

GPIO GPIO

GPIO

EAR

HFR_S

USB

USB UART1 MIC2 MIC1

UART1 MIC2 MIC1

SWITCH

Slave Memory

128Mx64M

NOR/

UtRAM

SIM

SLAVEON (mater)

Master

Slave

SWITCH

USB UART EARSPK

USB UART EARSPK EARMIC

EARMIC

Micro usbswitch

Micro usb con

8-1

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Common

Level3Repair

PCB Diagrams

8-2.

8-2-1.

Top

8-2

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8-2-1.

Bottom

8-3

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Flow Chart of Troubleshooting

8-3.

presetting methods for checking TP

※

GND&TP(exp. Vbatt=C108, C109, C212,C308)using Oscilloscope

-

look over the coming out signal.

-

Oscilloscope

←

8-4

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Multi-meter

←

Level3Repair

EX) to look up the TP, shunt Cap.

-

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Checking the TP(test point) using Multi-meter

←

if checking the GND, you can listen"beep"

-

if checking the Signal, you can't listen it.

8-5

Level3Repair

8-3-1.

Power On

Power On'does not work

'

Check the Battery Voltage

is more than C300, C311,C501)

(

VDD_IO_LOW_1.8V

C213,

(

Check the Clock at

OSC300(CLK32K)

C332, C333)

(

Yes

=1.8V ?

214)

Yes

3.3V

=32

KHZ

No

Change the Battery

Because of batt. power low)

(

Check the Main Chip related to

VDD_IO_LOW_1.8V

to look over the Chip damage)

(

Check the Main Chip

to lookover the Chip damage)

(

C332, C333/look over the waverform

(TP:

using the oscilloscope)

Yes

VDD_CORE_2

L301, C328, C330)

(

Yes

END

=1.2

V?

No

Resolder L301, C328, C330

to confirm coming out power V_core)

(

8-6

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8-7

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8-8

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8-3-2.

Initial

Initial Failure

Yes

UCP200 pin E7(RSTON)

="H(>2.4V)"?

C227)

(

Yes

Slaveon signal is changed

-> L→H

in boot sequence

R723&R719

(

)

No

H

No

Replace UCP200, must be"H"

Replace Q700 and check once again

Yes

Check the16bit data signal

memory CE(TP214,TP215)

&

Yes

END

8-9

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8-10

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8-11

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8-3-3.

Charging Part

Check VBUS voltage

(

Abnormal charging part

Yes

TP:C438,1pin of IFC400)

U404 pin

15 (

>4.9V

TP:C435)

(

>4.9V

Yes

OUT)

Yes

No

(

No

be possible that it's not soldering well)

(

Resolder IFC400, C438

be possible that it's not soldering well)

Resolder U404

U300 pin

>4.9V

TP:C325)

(

38(

END

VCHG)

Yes

No

Resolder C325, C435

and

Replace U300 usingaHeatgun

8-12

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8-13

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8-14

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8-3-4.

Sim Part

Phone can't access SIM Card

Yes

SIM

or R307 and R308

Check SIMClk Signal on

pin3 of SIM

method:wiring pin3and

(

checking its waveform using an

SIM301 pin

300,

"H=3.0V" ?

Yes

After Power ON,

SIM301 inafew

300,

second

oscilloscope)

1

No

Resolder R300, U305

insert SIM card&access it,

then must be"H=3.0V"

Resolder or Replace SIM

connector.(Because of not soldering well)

300,

SIM301

Yes

After SIM card insert,

SIM

method:wiring pin3and check

(

SIM301 pin2(SIM_RST)

300,

= "H=3.0V"?

its waveform using an

oscilloscope) oscilloscope)

Yes

Check the SIM Card

look over if it get damaged.)

(

Yes

END

No

Confirm an another PBA

8-15

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8-16

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8-17

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