gt-e1200m

SAMSUNG Proprietary-Contents may change without notice

8. Level 3 Repair

8-1

This Document can not be used without Samsung's authorization

8-1. Block Diagram

Modem

(PNX4848)

MAIN LCD

MD(0:7) /NCS(0)/A(20)/Wen/LED_A

VGPIO2.8V

VMEM_1.8V

QQVGA(128x128)SYSRST

SIM

VSIM_3.0V

32.768kHz

NCS_FLASH / NCSRAMVMEM_1.8V

MD(0:15) / A(17:20)

LB / UB

SYSRSTPHONE MEMORY

NOR

32Mb

OEn/WEn

A(13)*F-RDY/R-WAIT# / A(14)*CLK / A(15)*AVD#

SIM_RST

SIM_CLK

LED Drv. (FAN5622SX)

LED_K1/LED_K2 VBAT

MOTORMVBAT

KEYIN/IO(0:2)

KEYOUT(0:3)

CKEYPAD

Li- Ion Battery(Standard)800mAh

SIM

SIM_DATA

MICMIC_N

MIC_P

EARMICAUX_MIC_P

AUX_MIC_N

KEY_LED_3.3V

EAR_N

EAR_P

EEAARRSSPPKK

SSPPKK && RREECCEEIIVVEERR

SPK_P

SPK_N

VCM_OUT

TX MODULE

(AM7808) RX/TX

FMM640D0B-12IA

64Mb

PSRAM32Mb


Level 3 Repair

8-2


8-2. PCB Diagrams8-2-1. Top

BAT200

BTC200

C100

C101C102

C103

C104

C105

C106

C108

C109

C110

C111

C113

C114

C115

C116

C117

C118

C119

C120

C121

C122

C123

C124C126

C127

C129

C130

C131

C132

C133

C134

C135

C200

C201

C202

C203

C204

C205

C206

C207

C208

C209

C210

C211

C212

C213

C214

C215

C216

C217

C218

C219

C220

C221

C222

C223

C224

C225

C226

C227

C300

C303

C304

C305

C306

C307

C308

C309

C310

C311

C312

C313

C314

C315 C316

C317

C318

C319C

320

C321

C322

C323C

324

C325

C326

C327

C328

C329

C330

C331

CN100

CON100

F100

IFC300

L101

L102

L104

L105L106

L107

L108

L200

L201

L300

L301

L302

L303

L304

L305

L306

L307

L308

L309

L310

L311

L312

L313

L314

L315

LED300

MIC300

MO

T100

OSC

200

OSC

201

PA

M100

R100

R101

R102

R103

R104

R105

R106

R107

R108

R109

R110

R111

R112

R113

R116

R117

R119

R121R122

R200

R201

R202

R203

R204

R205

R206

R207

R208

R209

R210

R211

R212

R213

R214

R215

R217

R218

R219

R220

R221

R222

R300

R302

R303

R305

R306

R307

R308

R309

R310

R311

R312

R313

R314

R31

5R

316

R317

R318

R319

RFS100

SC100

SC101

SC

102

SC103

SC

104

SC105

SC

106

SC

107

SC108

SC

109

SIM300

SPK

300

TH200

TP100

TP101

TP200

TP20

1

TP202

TR200

U100

U101

U102

U200

UM

E200

V301

ZD200

ZD300ZD

301

ZD302

ZD303


Level 3 Repair

8-3


8-2-1. Bottom

C301

C302

DIGIT30

0

DIGIT301

DIGIT302

DIGIT303 DIGIT304DIGIT305

DIGIT306DIGIT307

DIGIT308

DIGIT309

DOWNEND

INT

LCD300

LED

301

LED

302

LED303

LED304

LEFT

R114 R115R118R120

R301

RIG

HT

SE

ND

SHARP

SO

FT300

SOFT301

STAR

UP

V300


Level 3 Repair

8-4


8-3. Flow Chart of Troubleshooting

※ presetting methods for checking TP- GND & TP(exp. VBAT=C105 ) using Oscilloscope- look over the coming out signal.

← Oscilloscope

GND


Level 3 Repair

8-5


← Multi-meter


Level 3 Repair

8-6


← Checking the TP(test point) using Multi-meter

- EX) to look up the TP, shunt Cap. - if checking the GND, you can listen "beep"if checking the Signal, you can't listen it.


Level 3 Repair

8-7


8-3. LOGIC

8-3-1. Power On

Check the Battery Voltageis more than 3.5V

(TP:C308)

' Power On ' does not work

Change the Battery

END

No

Yes

Check the Clock atOSC201 (1,4, 32.768kHz,

±20ppm)

No

Yes

Check the initial operation

Yes

Yes

replace the OSC201

Check the Clock atOSC200 1,3pin

(when normal operatingcondition, 26MHz ±11ppm)

Yes

NoCheck the Main Chip

(to lookover the Chip damage)

(TP : OSC200 1,3pin / look over the waverform

using the oscilloscope)


Level 3 Repair

8-8



Level 3 Repair

8-9


8-3-2. Initial


Level 3 Repair

8-10


Initial Failure

END

LCD_RST > 1.7V ?

Yes

Yes

NoChange PBA.

Check the 16bit data signals.

Yes


Level 3 Repair

8-11



Level 3 Repair

8-12


8-3-3. Sim Part

SIM300 pin1, pin4

≥ 3.0V?

and

pin3(SIM_CLK) ≥ 3MHz ?

Phone can't access SIM Card

Resolder or Replace SIM300

Check the SIM Card (is broken?)

END

No

Yes

Yes

No

Change PBA

Check signal sequence,VSIM_3.0V(C314) →SIM_DATA(C313) →

SIM_CLK→SIM_RST

Yes

Yes


Level 3 Repair

8-13



Level 3 Repair

8-14


8-3-4. Microphone Part

C320 = 2.4Vat Mic Active?

Check the MIC Connection(look over schematics about

schemetics.)

Replace U200 using a Heatgun(Because of not soldering well)

Resolder

L311,L312,L313,R315,C320,C317,C321

(not work if those are not connected.)

END

No

Yes

Yes

Yes

Yes

No

Check the MIC sample.(it be possible the problem

things)

No Replace an another MIC

(because of being possible the problem)

Microphone does not work


Level 3 Repair

8-15



Level 3 Repair

8-16


8-3-5. Ear Microphone Part

C308≥ 2.1Vat Ear Mic Active?

Check the Ear MIC Connection(look over schematics about

schemetics.)


Resolder C303,C306,R303,L302,L303

(not work if those is not connected.)

END

No

Yes

Yes

Yes

Yes

No

Check the Headset sample.(it be possible the problem

things)

No Replace an another Headset


Ear Microphone does not work


Level 3 Repair

8-17



Level 3 Repair

8-18


8-3-6. Speaker Part

L307, L308> 2.0 V

(Wiring the SPK N/P andchecking an waveform using

oscilloscope)

Does not work Voice call ? Replace U200 using a Heatgun(be possible of being U200 a bad sample)

No

Yes

No

Resolder L307& L308

(be possible because of soldering not well)

Yes

Does not work Ringtone?(Menu->Settings->Sound

profiles->Edit->select the Call ringtone)

Resolder or Replace U200, SPK300(be possible of soldering not well or being

U200 a bad sample)

No

Yes

END

Is Speaker working?(Listening through the

speaker)

Change Speaker(be possible of SPK Problems

or not inserting it right.)

No

Yes

Speaker does not work

Yes


Level 3 Repair

8-19



Level 3 Repair

8-20



Level 3 Repair

8-21


8-3-7. Motor Part

C118 = 3.3Vat Motor Active?

Check the Motor Connection(look over schematics about

schemetics.)


Resolder MOT100

(not work if those is not connected or

not soldering well.)

END

No

Yes

Yes

Yes

Yes

No

Check the Motor sample.(it be possible the problem

things)

No Replace an another Motor module sample


Motor does not work


Level 3 Repair

8-22



Level 3 Repair

8-23



Level 3 Repair

8-24


8-3-8. Key Data Input

Check Initial Operation

Yes

Check the 3×4 keydomesheet

(adhesion condition,foreign substances)

Change the 3×4 keydomesheet

or adhere correctly toPBA.

3×4 Key

Check the keycircuit.

(not connected, notsoldered, short)

resolder L309 L310 L314L315 C331 ZD303

No

Yes

END

No

Is it the 3×4key or the SUB

key?

SUB key Change the SUB keydomesheet

or adhere correctly toSUB PBA.

Check the SUBkey domesheet

(adhesioncondition, foreign

substances)

No

Yes

Yes

Check the SUB PBA(is broken?)

Yes

END

Check theconnection

condition. (notconnected slide

FPCB)

Reconnect slideFPCB

No

Yes


Level 3 Repair

8-25



Level 3 Repair

8-26


8-3-9. Back Light (LCD)

LCD does not work

Yes

Check the LCD FPCB(connection, broken)

No Change the LCD module or connect the LCDFPCB to SUB PBA correctly.

Yes

Resolder the C329Check the LCD300 mounted to PBA correctly.

NoThe Voltage at C329=VGPIO?

END

Yes

Check the slide FPCB(connection, broken)

No Change the SUB PBA or connect the slideFPCB to PBA correctly.

Yes


Level 3 Repair

8-27



Level 3 Repair

8-28



Level 3 Repair

8-29


8-3-10. GSM900 Rx

RX ONCell Power : -60dBm

PAM100 Pin10 ≥-65dBm

Yes

Resolder PAM100,No

Yes

NoCheck PAM100control check

PAM100 Pin12 ≥-68dBm Check ANT Switch

control circuitNo

YesResolder PAM100

Yes

Resolder F100,L106,L108F100 6,7pin, L106,

L108≥-75dBm

Yes

No

Check U200 is working

Yes

END


Level 3 Repair

8-30


8-3-11. DCS Rx

RX ONCell Power : -60dBm

PAM100 Pin10 ≥-65dBm

Yes

Resolder PAM100,No

Yes

NoCheck PAM100control check

PAM100 Pin12≥-68dBm

Check ANT Switchcontrol circuit

No

YesResolder PAM100

Yes

Resolder F101,L105,L107F100 9,8pin, L105,

L107≥-75dBm

Yes

No

Check U200 is working

Yes

END


Level 3 Repair

8-31



Level 3 Repair

8-32



Level 3 Repair

8-33


Check the VoltageC103 〉3.3V?

8-3-12. GSM900 Tx

TX Power is too Low!!

TX ON (5Level)

CLOCK CHECK?26MHz @ OSC200 (pin1,

pin3)

NORe-solder OSC200

YES

PAM100 pin27 ≥ -1dBm

(R106 using spectrumanalyzer)

NO Re-solder or changeUCP200

YES

NO Check the UCP200 & VBATcircuit.

YES

NOResolder PAM100

PAM100 Pin17 ≥30dBm


YES

Resolder RFS100.Check the RFS100connection with PCB?

YES

Antennare-solder or change

NO


Level 3 Repair

8-34


Check the VoltageC103 〉3.3V?

8-3-13. DCS Tx

TX Power is too Low!!

TX ON (5Level)

CLOCK CHECK?26MHz @ OSC200 (pin1,

pin3)

NORe-solder OSC200

YES

PAM100 pin29 ≥ -1dBm

(L111 using spectrumanalyzer)

NORe-solder or change

UCP200

YES

NOCheck the UCP200 & VBAT

circuit.

YES

NOResolder PAM100

PAM100 Pin17 ≥30dBm


YES

Resolder RFS100.Check the RFS100

connection with PCB?

YES

Antennare-solder or change

NO


Level 3 Repair

8-35



Level 3 Repair

8-36



Level 3 Repair

8-37


- NC Point(Top View)

: NC

U200


Level 3 Repair

8-38


UME200


Level 3 Repair

8-39


BAT200

BTC200

C100

C101C102

C103

C104

C105

C106

C108

C109

C110

C111

C113

C114

C115

C116

C117

C118

C119

C120

C121

C122

C123

C124C126

C127

C129

C130

C131

C132

C133

C134

C135

C200

C201

C202

C203

C204

C205

C206

C207

C208

C209

C210

C211

C212

C213

C214

C215

C216

C217

C218

C219

C220

C221

C222

C223

C224

C225

C226

C227

C300

C303

C304

C305

C306

C307

C308

C309

C310

C311

C312

C313

C314

C315 C316

C317

C318

C319C

320

C321

C322

C323C

324

C325

C326C

327C328

C329

C330

C331

CN100

CON100

F100

IFC300

L101

L102

L104

L105L106

L107

L108

L200

L201

L300

L301

L302

L303

L304

L305

L306

L307

L308

L309

L310

L311

L312

L313

L314

L315

LED300

MIC300

MO

T100

OS

C200

OSC

201

PA

M100

R100

R101

R102

R103

R104

R105

R106

R107

R108

R109

R110

R111

R112

R113

R116

R117

R119

R121R122

R200

R201

R202

R203

R204

R205

R206

R207

R208

R209

R210

R211

R212

R213

R214

R215

R217

R218

R219

R220

R221

R222

R300

R302

R303

R305

R306

R307

R308

R309

R310

R311

R312

R313

R314

R31

5R

316

R317

R318

R319

RFS100

SC100

SC101

SC

102

SC103

SC

104

SC105

SC

106

SC10

7

SC108

SC10

9

SIM300

SP

K300

TH200

TP100

TP101

TP200

TP20

1

TP202

TR200

U100

U101

U102

U200

UM

E200

V301

ZD200

ZD300

ZD301

ZD302

ZD303

gt-e1200m

Documents

samsungs authorization8

tp gnd tpexp

clock atosc200

clock atosc201

c308 power

power oncheck

multimeter ex

initial operationyesyesreplace