SYSO L Flow Chart of

Troublesshooting

SYSOL

1.PowerOn Fai

l

Power Defect

Currenti

ntensi

ty

val

ue over 100mA

when connectPower

Re-Downl

oad

Gauge Power Suppl

y

Currenti

ntensi

ty

A forei

gn substance

atI/F BAT termi

nal

or SMD error.

Exchange and repai

r

Check M AIN CHIP PIN

Is V_ISUP

Vol

tage 2.

7V?

Check Bypass C-CHIP

atPM U and V_ISUP End

A

NO

YES

NO

YES

NO

IS CLOCK

SIGNAL 32KHz ?

OSILRATOR CHECK

NO

IS VDD1

VOLTAGE Hi

?

VDD1 CIRCUIT CHECK

NO

ARE VDD2 AND

VDD3 2.

8V?

VDD2,

VDD3 CIRCUIT

CHECK

NO

YES

YES

YES

YES

YES

A

Freq = 13MHz

or 26MHz

Check the Ci

rcui

tor

Generati

on(Osci

l

l

ator)

Check whether speci

fi

c s/w

Probl

em or other probl

em.(Re

-TEST after i

ni

ti

al

i

zati

on)

END

YES

NO

SYSOL

2.Si

m PartFai

l

Di

spl

ayed "Insert

SIM"

Are the PIN 1,

5

Vol

tage ofSIM

Connector Hi

?

Check SIM Charge Pump

A forei

gn

substance at

Si

m connector

or SMD error.

Exchange and repai

r

Generati

ng Si

gnalfor

few second atPIN 3

ofSIM CONNECTOR

ATFER POW ER ON

Check 32KHz OSC

SIM CARD Check

YES

NO

NO

YES

YES

YES

YES

END

After Insert

SIM CARD

PIN2=

Hi

(Si

m_Rst)

EXCHANGE PBA

NO

YES

SYSOL

3.Radati

on Cal

l Fai

l

Radi

ati

on Tel

ephone

Cal

lDefect.

OPEN Ci

rcui

t

between RF termi

nal

and RF CON or Not

Check ShortatEM I

Treatmentpartof

FRONT and REAR

(l

ess than 5Ohm)

RF CON.CHECK

Forei

gn

substance

Servi

ce can or

not

Cal

lfai

lerror

Repai

r OPENED POINT

Check Cal

lTest

Check SERVICE Yes or NO

NO

YES

NO

YES

END

SYSOL

4.AGC (Auto Gai

n Control

)Fai

l

Conti

nuous Rx On

CH center freq :+67.

7KHz

Amp :-50dBm

InputofANT

S/W >= -65dBm

Check Seri

es wi

th RF

CONNECTOR C-CHIP

Check SAW FILTER

InputpartC-CHIP & L-

CHIP

SAW FILTER

Input>= -70dBm

NO

YES

NO

GSM RX ofANT

S/W >= -65dBm

NO

Is VC_EGSM

&VC_DCS from

ANT S/W LOW ?

Check ANT S/W Ci

rcui

t

NO

ANT S/W Re-sol

deri

ng

and Check

YES

RFLOIA (RF

Freq.

*2)from

RFIC +100KHz

>=-30dBm

RFIC의

IB,

IA,

QA,

QB

>=1V

NO

RFIC & RF13M Hz

RFLOIA InputpartR,

C-

CHIP ,PSU partRe-

sol

deri

ng and Check

NO

RFIC Check

YES

SAW FILTER Inputpart

C-CHIP & L-CHIP Check

I/Q DATA output

partseri

es

resi

stance >= 1V

NO

YES

YES

YES

YES

YES

Check MAIN CHIP

END

YES

SYSOL

5.APC (Auto PowerControl

)Fai

l

TX ON (5LEVEL)

ANT S/W Output

>= 20dBm

Check OutputC-CHIP

whi

ch i

s seri

es-

connected wi

th RF

CONNECTOR

PAM TX OutputpartR,

C

-CHIP Check

PAM Output(GSM

OUT)>= 20dBm

YES

ANT S/W 의 GSM

TX >= 20dBm

ANT S/W

VC_EGSM >=

2.

8V,VC_DCS =

LOW ?

ANT S/W Re-sol

deri

ng

and Check

NO

Check ANT S/W Ci

rcui

t

YES

PAM'

s

+VBATT,

VBA

T&GSM IN are

nomal

?

PAM

Output(GSM

IN)>= -11dBm

PAM Re-sol

deri

ng and

Check

NO

Check +VBATT or PAM

si

gnal

YES

VCO OutputpartR-CHIP

Re-sol

deri

ng and Check

VCO Output가

>= -8dBm

IA,

IB,

QA,

QB

from RFIC >=

500mV

YES

NO

RFLOIA from RFIC

>=-20dB &

IFTUNE >=2V?

Re-sol

deri

ng and Check

RFLO si

gnaland RF

13MHz RF PSU part

A

B

YES

YES

YES

YES

YES

NO

NO

NO

NO

YES

NO

MAIN CHIP Check

END

A

B

TXCPVCC,

IFVCC,IFVC,

SYNVCC >=2.

7V

YES

Re-sol

deri

ng and Check

RFIC

SYSOL

6.RTC Fai

l

RTC FAIL

RTC BATTERY

2.

8V CHECK

MEM ORY CHECK OR

RTC CRYSTAL

Osci

l

l

ati

on Check

Check RTC BATTERY

Vol

tage

B'

D TEST

Executi

on and

Check NO ERROR

PASS(NO ERROR)

RTC BATTERY

Chargi

ng TEST

BAT 3V

CHECK C,

R-

CHIP

Check Vol

tage Ri

si

ng of

RTC BATTERY i

n

condi

ti

on connecti

ng power

B'

D TEST(PASS)

VRTC CHECK

NO

YES

NO

YES

YES

NO

YES

REPLACE M 100

(RTC BATTERY)

REPLACE PM U &

MEM ORY

NO

END(PASS)

SYSOL

7.D/L (Down Load)Fai

l

D/L FAIL

IINTERFACE

SMD Defect

Yes or NO

INTERFACE,TRIDENT

CHECK OR REPLACE

FEED BACK and Repai

r

CHECK Power

Yes or No

REDOW N LOADING

TXD0,RXD0

CTS0,RTS

CHECK

M EM ORY CHECK

OR REPLACE

REDOW N LOAD

NO

YES

NO

YES

NO

YES

Check Power

END(PASS)

PASS

SYSOL

8.AFC (Auto Frequency Control

)Fai

l

AFC FAIL

RFIC CHECK

OR REPLACE

13or26M Hz(OSC)CHECK

Check The Auto

Cal

i

brati

on

DefectYes or No

NO ERROR(PASS)

Check OFFSET Val

ue

Change Yes or No i

n

proporti

on to Changed

CDAC Val

ue when

AFC TEST

AUTO CALIBRATION

CSP CHECK

OR REPLACE

NO

YES

NO

YES

NO

YES

RFIC CHECK

OR REPLACE

END(PASS)

END

Exi

stence of

AFC Si

gnal

Exi

stence of

13MHz_BB Si

gnal

NO

Exi

stence of

RTX QP,QN

RTX IP,IN

Si

gnal

YES

NO

YES

NO

MAIN CHIP REPLACE

SYSOL

9.EAR Phone Recogni

ti

on Fai

l

EAR PHONE Recogni

ti

on

FAIL

JACK IN Si

gnal

CHECK

E/P IC & E/P JACK

CHECK

Check VDD2(3V)Vol

tage

EAR JACK

OPEN TEST

EAR JACK

REPLACE

M AIN CHIP CHECK

OR REPLACE

EARP_P,

N &

Si

gnalCHECK

A,

B

Si

gnalCHECK

MAIN CHIP CHECK

OR REPLACE

E/P IC CHECK

OR REPLACE

NO

YES

NO

YES

YES

NO

YES

EAR PHONE TEST

END(PASS)

NO

EAR_SW ITCH

Si

gnalCHECK

YES

NO

SYSOL

10.BELL(TONE)Sound Fai

l

BELL Sound FAIL

Check Ok or notthe

Forei

gn substance and

contactcondi

ti

on at

LCD CON

MELODY_CS

CHECK

CLEAN OR CONNECTOR

REPLACE

BELL Sound TEST

CLK13MHz

CHECK

FOLDER

SW AP TEST

M ELODY IC CHECK

OR REPLACE

END(PASS)

NO

YES

NO

YES

YES

NO

YES

END(PASS)

NO

Check

MEL_13MHz

YES

NO

CHECK

MELODY IC

AMP_P,

N

YES

NO

RFIC CHECK

OR REPLACE

M AIN CHIP

REPLACE

SYSOL

11.KEY Lock-up Fai

l

KEY l

ock-up FAIL

VOLUMKEY

SHORT TEST

Check

osci

l

l

ati

on of

OSC(crystal

)

VOLUM KEY CHECK

OR REPLACE

END KEY & PMIC CHECK

KEY PATTERN

SHORT TEST

After Removi

ng

KEY DOM

CAMERA KEY

SHORT TEST

KEY(SYSOL)Si

gnalCHECK

OR REPLACE

END(PASS)

NO

YES

NO

YES

NO

END(PASS)

END KEY &

PMIC CHECK

YES

NO

SYSOL,OSC(Crystal

)

CHECK OR REPLACE

Check W rong reconi

zi

ng KEY,

Check END KEY

CAMERAKEY CHECK

OR REPLACE

YES

YES

YES

YES

NO

SYSOL

12.CHARGE Fai

l

Chargi

ng MODE FAIL

Gauge the V_EXT_CHARGE

Chargi

ng Vol

tage 4.

8-5.

0V

CHARGE TR

"B"Vol

tage CHECK

CHECK SHORT and

Burn outatZENER

DIODE GND of

V_EXT_CHARGE End

CHARG Ci

rcui

tREPLACE

Check

END_OFCHARG

E Si

gnal

CHARG Ci

rcui

t

CHARGE TR

"C"Vol

tage CHECK

Interface

JIG_ON_IFSi

gnalCHECK

END(PASS)

NO

YES

NO

YES

NO

ZENER DIODE

REPLACE

CHG_ON

Si

gnal

CHECK

YES

NO

CHARG TR

REPLACE

SYSOL CHECK

OR REPLACE

CHARGING IC

REPLACE

YES

NO

NO

JIG_RECSi

gnal

CHECK

CHECK R,

-

CHIP ofJIG ON

Si

gnalEnd

PM IC

REPLACE

YES

NO

NO

SYSOL

13. Di

spl

ay Fai

l

Di

spl

ay FAIL

Check (LCD CON) the

damage by forei

gn substance

FOLDER

SW AP TEST

CN201 REPLACE

(CAM.IC)

CHECK OR REPLACE

LD (0:15)

Si

gnalCHECK

IMAGE_CS

Si

gnal

&LCD_MAIN_C

S CHECK

MEM ORY CHECK

OR REPLACE

END(PASS)

NO

YES

NO

NO

W hi

te Screen,

Screen Error

Software Down

Load executi

on

YES

NO

FOLDER Defect(PASS)

Software Error(PASS)

FOLDER OR PBA

DefectDi

sti

ncti

on

YES

NO

NO

HD(0:15)

HA(0:20)Si

gnal

CHECK

PMIC CHECK

OR REPLACE

SYSOL CHECK

OR REPLACE

YES

NO

NO

YES

SYSOL

14. I

MEII

nputFai

l

IM EIi

nput FAIL

POW ER ON

CHECK

Check can dri

ve or not

Communi

cati

on Mode

Refer to Power DefectFLOW

CHART

M EMORY REPLACE

Re-

Instal

l

END(PASS)

NO

YES

NO

Check Error i

n

Software and

Hardware

YES

NO

Software Down Load and Re-

adj

ustment

Software Down Load

CN200(INTERFACE)CHECK

YES

NO

ReW ri

ti

ng

IM EI

SYSOL

15. CAMERA MODE Enteri

ng Fai

l

Camera M ode Enteri

ng

FAIL

Runni

ng CAMERA

MODE

CAMERA KEY

Damage

Assembl

i

ng or Resource Defect

(REPLACE)

FOLDER Defect(PASS)

Camera IC(ALPHA CHIP)

REPLACE

OSC REPLACE

NO

YES

NO

Check Forei

gn

Substance and

Damage atLCD CON

YES

NO

CN201 REPLACE

NO ERROR (PASS)

YES

NO

Fol

der Swap

TEST

Exti

ncti

on of

OSC Osci

l

l

ati

on

NO

YES

CLK270,

1

Si

gnalCHECK

NO

YES

CAM ERA TEST

END(PASS)

SYSOL

16. Vi

brate Fai

l

Vi

brate FAIL

VIB End Ci

rcui

t

CHECK AND

SHORT CHECK

Check Forei

gn

Substance and

Damage atCON.

CONNECTOR CLEAR OR REPLACE

MELODY IC CHECK OR

REPLACE

RFIC Check OR REPLACE

Vi

brate TEST

NO

YES

NO

Fol

der Swap

TEST

YES

NO

FOLDER Defect(PASS)

PMIC CHECK OR REPLACE

YES

NO

VIB Si

gnal

CHECK

MEL_13M

Si

gnalCHECK

NO

YES

D_REF_13M

Si

gnal

CHECK

NO

YES

END(PASS)

YES

SYSOL

17.Battery Cal

i

brati

on Fai

l

Battery Cal FAIL

Low Batt

CHECK

Power INITIAL

CHECK

POW ER ON Repai

r Fl

ow Chart

PM IC&PAM CHECK OR

REPLACE

MAIN CHIP CHECK OR

REPLACE

NO

YES

NO

B'D TEST

Re-aj

ustment

YES

NO

FOLDER Defect(PASS)

FULLRESET Executi

on

YES

VBATT

Vol

tage

CHECK

CHECK

MES_BATT

End Ci

rcui

t

NO

YES

END(PASS)

YES

Re-sol

der and REPLACE

M ES_BATT end R-CHIP

YES

SYSOL

18.

Transmi

ssi

on and recepti

on No Sound Fai

l

KEY Sound

Check

Cal

lthe Phone and

Transmi

ssi

on and

recepti

on

TEST

NO ERROR (PASS)

M AIN MIC End Ci

rcui

tR,

C-CHIP

CHECK OR REPLACE

PMIC CHECK OR REPLACE

NO

YES

NO

MIC CHECK

BIASE Vol

tage

1.

6V,0.

4V

Y

E

S

NO

MIC REPLACE

EAR PHONE Recogni

ti

on CHECK

YES

BIASE

Vol

tage

CHECK

CHECK PMIC

VCCA Power

End

NO

END(PASS)

YES

M AIN CHIP CHECK OR

REPLACE

YES

NO

No Sound i

n Transmi

ssi

on

and recepti

on

SYSOL

19.ORFS Fai

l

ORFS FAIL

Compare wi

th PAM

Ampl

i

fi

cati

on and Check

the di

storti

on of

Frequency and waveform

RAMPING

FAIL

AUTO CALIBRATION Re-

Adj

ustment

U403(RF IC)REPLACE

RF IC REPLACE

NO

TX I,

Q Si

gnal

Noi

se CHECK

NO ERROR(PASS)

FINAL GSM RF TEST

YES

VCC_CP Vol

tage

Noi

se and Si

ze

CHECK

RF VCO Power end

Si

gnalCHECK

Noi

se,Di

storti

ng

NO

END(PASS)

YES

PAM REPLACE

NO

MODULATION

FAIL

PMIC REPLACE

NO