Samsung SGH-A400 service manual

DUAL BAND GSM

TELEPHONE

SGH-A400

SERVICE

Manual

DUAL BAND GSM TELEPHONE CONTENTS

1. Exploded Views and Parts List

2. Electrical Parts List

3. Block Diagrams

4. PCB Diagrams

5. Flow Chart of Troubleshooting and

Circuit Diagram

1. Exploded Views and Parts List

1-1 SGH-A400 GSM Telephone Exploded View

1-2 SGH-A400 GSM Telephone Parts List

1-3 SGH-A400 Travel Adapter

1-4 SGH-A400 Travel Adapter Parts List

1-5 SGH-A400 Cigarette Lighter Adaptor

1-6 SGH-A400 Cigarette Lighter Adapter Parts List

1-7 SGH-A400 Test Jig

1-7-1 SGH-A400 Test Jig Cable

1-7-2 SGH-A400 RF Jig Cable

1-7-3 SGH-A400 Test Jig

2. Electrical Parts List

3. Block Diagrams

3-1 Main Block Diagram

3-2 Main R

F

3-2-1 RF Tx Part

3-2-2 RF Rx Part

4. PCB Diagrams

4-1 Main Top

4-2 Main Bottom

5. Flow chart of trouble shooting

5-1 Power ON

5-2 Initial

5-3 Sim Part

5-4 Charging Part

5-5 Microphone Part

5-6 Speaker Part

5-7 Key Data Input

5-8 Ring Indicator

5-9 Back Light

5-10 Alert Tone

5-11 GSM Receiver

5-12 GSM Transmit

5-13 DCS Receiver

5-14 DCS Transmit

SAMSUNG Proprietary-Contents may change without notice

1-1

1. SGH-A400 Exploded View and its Parts List

1-1 SGH-A400 GSM Telephone Exploded View

9

11

12

13

10

3

19

18

20-3

21

20-1

14

15

16

8

7

20

20-2

17

22

20-4

2-2

4

2-1

2-3

2


1-2

6

5

1

SGH-A400 Exploded view and its Part List

1-2 SGH-A400 GSM Telephone Parts List

NO DESCRIPTION SEC.CODE

REMARK

1

2

11

12

13

14

8

9

10

5

6

7

3

4

18

19

20

15

16

17

21

22

2-1

2-2

2-3

20-1

20-2

20-3

20-4

MEC-FOLDER UPPER

LCD ASS’Y

SPEAKER ASS’Y

VIBRATOR ASS’Y

SHIELD NET

FPCB

HINGE HOLDER ASS’Y

MEC-FOLDER LOWER

WINDOW-LCD

HOLE SHEET

SCREW-MACHINE

MEC-FRONT COVER

MIC

VOLUME ASS’Y

KEY PAD-SILVER

HOLDER-BUZZER

KEY-PCB ASS’Y

SHIELD COVER

PBA

COVER CONNECTOR

ANTENNA

RF JACK HOLDER

MEC-REAR COVER

ANTENNA LOCKER

REAR COVER

COVER-EARPHONE

WINDOW-IrDA

SCREW-MACHINE

BATTERY

GH75-00948A

GH72-02705A

GH73-00777A

GH59-00217A

GH71-00512A

GH92-00985A

GH73-00779A

GH42-00119A

GH73-00502F

GH75-01199A

GH71-00511A

GH72-02702A

GH73-00776A

GH72-02825A

6001-000883

GH43-00347A

GH75-01200A

GH07-00084A

GH59-00239A

GH31-00030A

GH74-01653A

GH59-00242A

GH75-01109B

GH75-01201A

GH72-01726B

GH74-01013K

6001-001155

GH75-01198A

GH59-00245A


1-3

SA

SA

SA

SNA

SNA

SNA

SNA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

650 mAh


1-3 SGH-A400 Travel Adapter

A

C

B

D

1-4 SGH-A400 Travel Adapter Parts List

TYPE

A

B

C

D

SEC CODE

GH44-00171A

GH44-00184A

GH44-00171C

Gh44-00171E

REMARK

CHINA

EUROPE

UNITED KINGDOM

TAIWAN


1-4

1-5 SGH-A400 Cigarette Lighter Adaptor


1-6 SGH-A400 Cigarette Lighter Adapter Parts List

DESCRIPTION

Cigarette Lighter Adapter Code

SEC CODE

GH44-00195A

REMARK

BLACK


1-5


1-7 SGH-A400 Test Jig

(GH80-00161A)

1-7-1 SGH-A400 Test Jig Cable

(GH39-00096A)

1-7-2 SGH-A400 RF Jig Cable

(GH39-00093A)


1-6


1-7-3 SGH-A400 Test Jig

DC

POWER

SUPPLY

8922 or 8960

WIRELESS COMMUNICATIONS

TEST SET

RF JIG CABLE

TEST

JIG

232 CABLE

TEST JIG CABLE


1-7

2. SGH-A400 Electrical Parts List

Level SEC CODE REFERENCE

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

1

GH92-00985A

4302-001119 BAT200

2203-000311 C100

2203-005065 C101

2203-000330 C102

2203-005571 C103

2203-000359 C104

2203-000233 C106

2203-000812 C107

2404-001151 C108

2203-005571 C109

2203-000278 C110

2203-000628 C111

2203-001432 C112

2203-005158 C113

2203-005061 C114

2203-001432 C115

2203-000628 C116

2203-000812 C117

2203-005571 C118

2203-005061 C119

2203-005061 C120

2203-001432 C121

2404-001105 C200

2203-005061 C201

2203-005509 C202

2203-000359 C203

2203-000359 C204

2203-005061 C205

2203-000254 C206

2203-000679 C207

2404-001017 C208

2203-000679 C209

2203-005065 C210

2203-000359 C211

DESCRIPTIONS

BATTERY-LI(2ND) 3 V, 0.1MAH, -, -, 3.1 V, -

C-CERAMIC, CHIP 0.12 nF, 5 %, 50 V, NP0, TP,

C-CERAMIC, CHIP 1000 nF, +80-20 %, 10 V, Y5 V, TP,


C-CERAMIC, CHIP 10000 nF, +80-20 %, 6.3 V, Y5 V,




C-TA, CHIP 33 uF, 20 %, 6.3 V, LZ, TP, 3216


C-CERAMIC, CHIP 0.01 nF, 0.5 pF, 50 V, NP0, TP,



C-CERAMIC, CHIP 0.0022 nF, 0.25pF, 50 V, NP0, TP,









C-TA, CHIP 10 uF, 20 %, 6.3 V, GP, TP, 2012






C-CERAMIC, CHIP 10 nF, 10 %, 16 V, X7R, TP, -


C-TA, CHIP 1 uF, 20 %, 10 V, GP, TP, 2012, 2, 0




Remark


2-1

SGH-A400 Electrical Parts List

Level SEC CODE

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

REFERENCE

2203-005509 C212

2203-005061 C213

2203-005061 C214

2203-005061 C280

2203-000233 C300

2203-000233 C301

2203-005053 C302

2203-005053 C303

2203-005446 C304

2404-001234 C305

2203-005061 C306

2203-000438 C308

2203-005053 C309

2203-000628 C310

2203-000628 C311

2301-001230 C312

2404-001105 C313

2203-000940 C314

2203-000812 C315

2203-000254 C316

2203-000254 C317

2203-000836 C318

2203-005664 C319

2203-000812 C320

2203-000438 C321

2203-000278 C322

2203-005446 C323

2203-000278 C324

2203-000254 C325

2203-000425 C326

2203-000425 C327

2203-005065 C328

2203-000940 C329

2203-000330 C330

2203-000836 C331

2203-005481 C332

2203-005664 C333

DESCRIPTIONS










C-TA, CHIP 68 uF, 20 %, 6.3 V, -, TP, 3.3x2.7x1.7mm






C-FILM, CHIP 10 nF, 5 %, 16 V, TP, 2012, -

C-TA, CHIP 10 uF, 20 %, 6.3 V, GP, TP, 2012

C-CERAMIC, CHIP 470 pF, 10 %, 50 V, X7R, TP, -





C-CERAMIC, CHIP 4700 nF, 10 %, 6.3 V, X5R, TP, 2012















Remark


2-2



1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2203-000386 C334

2203-000812 C335

2301-001230 C336

2203-005158 C337

2203-005158 C338

2203-000812 C339

2203-000812 C340

2203-002443 C341

2203-002443 C342

2203-002443 C343

2203-002443 C344

2203-000254 C345

2203-000254 C346

2203-005061 C400

2203-000233 C401

2203-005061 C402

2203-005065 C403

2203-005065 C404

2203-005664 C405

2203-005664 C406

2203-005065 C408

2203-000995 C409

2203-000359 C410

2203-000359 C411

2203-000254 C412

2203-005065 C413

2203-000233 C414

2404-001239 C415

2203-005562 C416

2203-005061 C417

2203-000940 C418

2203-000812 C419

2203-005796 C420

2203-000278 C421

2203-000233 C500

2203-000438 C501

2203-000812 C503

DESCRIPTIONS



C-FILM, CHIP 10 nF, 5 %, 16 V, TP, 2012, -





C-CERAMIC, CHIP 0.33 nF, 10 %, 50 V, X7R, TP,




















C-TA, CHIP 100 uF, 20 %, 6.3 V, WT, TP, 3.3x2.7x

C-CERAMIC, CHIP 10000 nF, +80-20 %, 10 V, Y5 V,




C-CERAMIC, CHIP 2200 nF, 10 %, 10 V, X7R, TP, 2012





Remark


2-3


Level SEC CODE

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

REFERENCE

2203-000233 C504

2203-000233 C505

2203-000278 C506

2203-005056 C507

2203-000233 C508

2203-000233 C509

2203-005234 C511

2203-000628 C512

2203-000628 C513

2203-000278 C515

2203-000628 C516

2203-000628 C517

2203-000812 C518

2203-000812 C519

2203-000278 C520

2404-001239 C521

2203-005148 C522

2203-000628 C525

2203-000233 C526

2203-000812 C527

2203-000233 C530

2203-000233 C532

2203-000812 C533

2203-005061 C534

2203-000278 C535

2203-000628 C537

2203-000438 C538

2203-000254 C539

2203-000696 C540

2203-000466 C541

2203-000679 C542

2203-000233 C543

2301-001475 C544

2203-000995 C545

2203-000628 C546

2203-000278 C547

2203-001432 C548

DESCRIPTIONS

















C-CERAMIC, CHIP 100 nF, 10 %, 16 V, X7R, TP, 1608,
















C-FILM, CHIP 3.9 nF, 5 %, 16 V, TP, 2.0 x 1.25 x 0.9mm





Remark


2-4



1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2203-005065 C549

2007-007771 C550

2203-005509 C551

2203-000725 C552

2203-005509 C553

2203-000812 C600

2203-000628 C601

2404-001151 C602

2203-005148 C603

2203-000812 C604

2203-000628 C605

2203-005367 C606

2203-000812 C608

2203-000812 C609

2203-002968 C610

2203-000812 C611

2404-001151 C613

2203-000812 C614

2203-005065 C615

2203-000812 C616

2203-005061 C617

2203-005061 C618

2203-000628 C620

2203-005065 C621

2203-005065 C622

2203-000628 C625

2404-001239 C627

2203-005065 C630

2203-001412 C631

2203-001412 C632

2404-001105 C634

2404-001105 C635

2203-000812 C636

2203-000812 C637

2203-000812 C638

2203-000812 C639

2203-000812 C640

DESCRIPTIONS


R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP,


C-CERAMIC, CHIP 3.9 nF, 10 %, 50 V, X7R, TP, -




C-TA, CHIP 33 uF, 20 %, 6.3 V, LZ, TP, 3216

C-CERAMIC, CHIP 100 nF, 10 %, 16 V, X7R, TP, 1608,








C-TA, CHIP 33 uF, 20 %, 6.3 V, LZ, TP, 3216














C-TA, CHIP 10 uF, 20 %, 6.3 V, GP, TP, 2012

C-TA, CHIP 10 uF, 20 %, 6.3 V, GP, TP, 2012






Remark


2-5


Level SEC CODE

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

REFERENCE

2203-000812 C641

2203-000812 C642

2203-000812 C643

2203-000812 C644

2203-000812 C647

2203-005065 C651

2203-000359 C652

2203-000812 C657

2203-000386 C658

2203-000386 C659

2203-000812 C660

2203-000812 C662

2203-000812 C663

2203-000812 C664

2203-000812 C665

2203-000812 C666

2203-000812 C667

2203-000438 C670

2203-000812 C671

3709-001190 CN400

3705-001178 CN500

3722-001530 CN600

3710-001585 CN601

3711-004623 CN602

3710-001653 CN604

0407-000115 D200

0401-001033 D201

0405-001093 D300

0401-001033 D402

0402-001463 D500

0407-000115 D601

2903-001211 F300

2904-001165 F301

2904-001096 F500

2904-001281 F501

2007-007771 F502

2703-000310 L100

DESCRIPTIONS




















CONNECTOR-CARD EDGE 6P, 2.54MM, SMD, -

CONNECTOR-COAXIAL SMC, JACK, 100 Mohm,

JACK-PHONE 5P, 2.6PI, A uF, BLK, -

CONNECTOR-SOCKET 20P, 2R, 0.5mm, SMD-S, A uF

CONNECTOR-HEADER BOX, 20P, 2R, 0.5mm,

CONNECTOR-SOCKET 18P, 1R, 0.5mm, SMD-A, A uF

DIODE-ARRAY DAN202U, 80 V, 100 mA, CA2-3, SC-70,

DIODE-SWITCHING MCL4154, 25 V, 200 mA, M-MELF,

DIODE-VARACTOR MA4ST230, 12 V, -, SOT-23, TP

DIODE-SWITCHING MCL4154, 25 V, 200 mA, M-MELF,

DIODE-RECTIFIER HSMS-2825, 15 V, 1 A, SOT-143,

DIODE-ARRAY DAN202U, 80 V, 100 mA, CA2-3, SC-70,

FILTER-CERAMIC BP, 14.6MHz, 300KHz, 6dB, 1dB,

FILTER-SAW 400MHZ, .28MHZ, +-70KHZ, TP, 6.5DB, -

FILTER-SAW 1.8425GHz, 75MHz, +-37.5MHz/2.5dB,

FILTER-SAW 947.5MHz, 25MHz, +-12.5MHz/1.4dB,

R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP,

INDUCTOR-SMD 1.8 uH, 10 %, 0.8x1.6x0.8mm

Remark


2-6



1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2703-001543 L300

2703-001513 L301

2703-002214 L302

2703-001513 L303

2703-001545 L304

2703-001543 L305

2703-001547 L306

2703-001547 L307

2703-001547 L308

2703-002218 L400

2703-001954 L501

2703-002213 L502

2703-002212 L503

2703-001514 L504

2703-002213 L505

2703-002284 L506

2703-001514 L507

2703-000175 L600

3301-001208 L602

2703-002298 L603

4709-001144 LAM1

0604-001146 LED600

2801-003695 OSC100

2801-003747 OSC200

2806-001191 OSC300

0501-000162 Q200

0504-000168 Q201

0501-002357 Q400

0501-002202 Q401

0504-001012 Q500

0504-001012 Q501

0504-001042 Q502

0504-000168 Q600

0501-002346 Q601

0501-002356 Q603

0504-001012 Q604

0504-001012 Q605

DESCRIPTIONS

INDUCTOR-SMD 33 nH, 5 %, 1.8x1.12x1.02mm


INDUCTOR-SMD 8.2 nH, 5 %, 1.6X0.8X0.8MM







INDUCTOR-SMD 100 uH, 20 %, 3.3X1.5X0.8MM

INDUCTOR-SMD 2.7 nH, 0.3 nH, 1.0x0.5x0.5mm





INDUCTOR-SMD 8.2 nH, °æ0.5 nH, 1.6X0.8X0.8MM



CORE-FERRITE BEAD AB, 1.6x0.8x0.8mm, -, -

INDUCTOR-SMD 8.2 nH, °æ10 %, 1.6X0.8X0.8MM

COUPLER-DIRECTION 897.5/1747.5MHZ,

PHOTO-IRDA -, 875NM, 500 mW, 30DEG, TP

CRYSTAL-SMD 19.5MHz, 10ppm, 28-ABK, 10.2pF, 20

CRYSTAL-SMD .032768MHZ, 30PPM, 28-ACM, 9PF,

OSCILLATOR-VCO 1258-1360MHZ, -, 50 ohm, TP,

TR-SMALL SIGNAL 2SA1576, PNP, 200 mW, SOT-323,

TR-DIGITAL RN1104, NPN, 100 mW, 47K/47K, SSM, TP

TR-SMALL SIGNAL ZUMT619, NPN, 500 mW, SOT-323,

TR-SMALL SIGNAL MMBT2222AWT1, NPN, 150 mW,

TR-DIGITAL DTC114YE, NPN, 150 mW, 10K/47K,


TR-DIGITAL BCR10PN, NPN/PNP, 250 mW, 10K/10K,

TR-DIGITAL RN1104, NPN, 100 mW, 47K/47K, SSM, TP

TR-SMALL SIGNAL 2SB1427, PNP, 500 mW, SOT-89,

TR-SMALL SIGNAL -, NPN, 250 mW, SOT-323, TP,



Remark


2-7

Level SEC CODE

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

REFERENCE

2007-000140 R100

2007-000140 R101

2007-001313 R103

2007-007092 R104

2007-000775 R105

2007-007468 R106

2007-007092 R107

2007-000137 R207

2007-000148 R209

2007-000148 R211

2007-000148 R212

2007-000148 R213

2007-000148 R214

2007-000148 R215

2007-000138 R216

2007-007771 R217

2007-000170 R218

2007-000140 R219

2007-007771 R280

2007-001288 R300

2007-001288 R301

2007-001323 R302

2007-000172 R303

2007-000172 R304

2007-001288 R305

2007-001323 R306

2007-008213 R307

2007-007001 R308

2007-000172 R309

2007-001298 R310

2007-000172 R311

2007-000146 R312

2007-000138 R313

2007-007136 R314

2007-000172 R315

2007-001298 R316

2007-000172 R317

DESCRIPTIONS

R-CHIP 1 kohm, 5 %, 1/16 W, DA, TP,


R-CHIP 330 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 1.1 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 33 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 121 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 1.1 kohm, 5 %, 1/16 W, DA, TP,


R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 100 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 1 Mohm, 5 %, 1/16 W, DA, TP,


R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 18 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 18 ohm, 5 %, 1/16 W, DA, TP,


R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 18 ohm, 5 %, 1/16 W, DA, TP,


R-CHIP 4.3 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 3.9 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 51 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 6.8 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 100 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 4.7 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 51 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP,


2-8


Remark



1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2007-000172 R318

2007-007771 R403

2007-000162 R404

2007-000143 R407

2007-000143 R409

2007-000138 R410

2007-007156 R411

2007-000138 R412

2007-000141 R413

2007-000157 R414

2007-000140 R500

2007-000140 R502

2007-000148 R503

2007-000148 R505

2007-001298 R506

2007-007193 R507

2007-001298 R508

2007-007193 R509

2007-000148 R510

2007-000137 R511

2007-007142 R512

2007-007312 R513

2007-001308 R514

2007-007142 R515

2007-007142 R516

2007-007142 R517

2007-001305 R518

2007-007142 R519

2007-007142 R520

2007-007142 R521

2007-000137 R522

2007-001306 R523

2007-001308 R524

2007-000170 R525

2007-007771 R526

2007-007095 R527

2007-000139 R528

DESCRIPTIONS

R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 100 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 4.7 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 4.7 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 100 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 1 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 100 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 2.2 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 47 kohm, 5 %, 1/16 W, DA, TP,



R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 51 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 5.1 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 51 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 5.1 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,


R-CHIP 10 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 20 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 200 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 120 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 1 %, 1/16 W, DA, TP,


R-CHIP 150 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 200 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 1 Mohm, 5 %, 1/16 W, DA, TP,

R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 390 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 220 ohm, 5 %, 1/16 W, DA, TP,


2-9

Remark


Level SEC CODE

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

REFERENCE

2007-000140 R529

2007-000148 R530

2007-000145 R531

2007-008117 R532

2007-000162 R533

2007-000140 R601

2007-001301 R604

2007-000242 R605

2007-000165 R607

2007-000162 R609

2007-000148 R610

2007-000142 R611

2007-000162 R612

2007-000140 R613

2007-000140 R616

2007-000154 R619

2007-001119 R620

2007-001339 R621

2007-001306 R635

2007-007316 R637

2007-000140 R638

2007-000140 R639

2007-000140 R640

2007-000162 R641

2007-000140 R642

2007-007592 R643

2007-007875 R644

2007-000152 R646

2007-000148 R648

1205-001708 U100

0902-001231 U201

1203-001592 U202

1205-001647 U300

0801-002641 U330

1203-001703 U400

1203-002099 U401

0504-001042 U500

DESCRIPTIONS


R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 6.2 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 2.7 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 100 kohm, 5 %, 1/16 W, DA, TP,


R-CHIP 68 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 1.5 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 200 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 100 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 2.7 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 100 kohm, 5 %, 1/16 W, DA, TP,



R-CHIP 24 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 680 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 180 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 150 ohm, 5 %, 1/16 W, DA, TP,

R-CHIP 3.3 kohm, 1 %, 1/16 W, DA, TP,




R-CHIP 100 kohm, 5 %, 1/16 W, DA, TP,


R-CHIP 270 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 160 kohm, 1 %, 1/16 W, DA, TP,

R-CHIP 20 kohm, 5 %, 1/16 W, DA, TP,

R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP,

IC-CODEC 20420, BGA, 100P, -, PLASTIC, 2.7V, -, -

IC-MICROPROCESSOR 46, 16BIT, BGA, 180P, -,

IC-VOLTAGE REGULATOR 1015, SOT-23A-5, 5P,

IC-TRANSCEIVER RF137, TQFP, 48P, 275MIL,

IC-CMOS LOGIC 7WZ08, 2-INPUT AND GATE, US8,

IC-VOLTAGE REGULATOR 20436, TQFP, 48P, 275MIL, ,

IC-VOLTAGE REGULATOR 5245, SOT-23-5, 5P, 64MIL,


Remark


2-10



1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0504-001042 U501

0504-001042 U502

0504-001012 U503

2909-001152 U505

2007-000137 U506

1201-001697 U507

0504-001042 U509

1201-001754 U510

1209-001219 U511

0801-002640 U512

2806-001192 U513

1106-001301 U514

1103-001147 U515

0506-001052 U600

1201-001800 U602

0504-001071 U603

1201-001753 U605

0506-001052 U8021

0406-001104 U8022

3711-004916 U8024

2203-005509 U8028

1203-002127 U8031

1405-001087 V600

1405-001087 V601

1405-001087 V605

1405-001087 V615

1405-001087 V616

1405-001087 V618

1405-001087 V619

1405-001087 V620

0404-001044 ZD400

0404-000108 ZD401

0404-000108 ZD402

0406-001104 ZD602

0406-001104 ZD604

0406-001104 ZD605

GH41-00184A

DESCRIPTIONS


TR-DIGITAL BCR10PN, NPN/PNP, 250m W, 10K/10K,


FILTER-DUPLEXER 942.5MHZ, 897.5MHZ, 1/1.2DB,


IC-IF/RF AMP RF210-51, TSSOP, 20P, 173MIL, -, -,

TR-DIGITAL BCR10PN, NPN/PNP, 250m W, 10K/10K,

IC-POWER AMP -, MCM, 16P, -, -, -, PLASTIC, 7V, -, -

IC-SENSOR LM60C, SOT-23, 3P, 115MIL, PLASTIC

IC-CMOS LOGIC 7WZ00, 2-INPUT NAND GATE, US8,

OSCILLATOR-VCO 902.5/1747.5MHZ, -, -, TP, 2.7 V,

IC-SRAM 1337, 262Kx16Bit, CSP, 72P, -, 85nS, 3V, -,

IC-EEPROM 24256, 256KBIT, SOP, 8P, 150MIL, -,

TR-ARRAY UMH9N, NPN, 2, 150 mW, SC-88, TP, 68-

IC-AUDIO AMP LM4900, MSOP, 8P, 118MIL, SINGLE, -,

TR-DIGITAL UMD9N, NPN/PNP, 150 mW, 4.7, UMT6, TP

IC-OP AMP -, MSOP, TP, 8P, 118MIL, DUAL, -,

TR-ARRAY UMH9N, NPN, 2, 150 mW, SC-88, TP, 68-

DIODE-TVS ESDA6V1-5W6, 6.1/-/7.2 V, 100 W,

CONNECTOR-HEADER -, 3P, -, 2.5MM, SMD-A, -,


IC-BATTERY 1734, SOT-23, 6P, 150MIL, PLASTIC,

VARISTOR 5.6 V, 20 A, 1x0.5x0.55mm, TP








DIODE-SCHOTTKY UPS5817, 20 V, 1 A, SMD, TP

DIODE-SCHOTTKY RB705D, 20 V, 30 mA, SOT-23, TP

DIODE-SCHOTTKY RB705D, 20 V, 30 mA, SOT-23, TP




PCB-SGHA400 SGH-A400, FR-4, 6L, -, 0.8T,

Remark


2-11

3. SGH-A400 Block Diagrams

3-1 SGH-A400 Main Block Diagram


3-1

SGH-A400 Block Diagrams

3-2 SGH-A400 Main RF Block Diagram


3-2

3-2-1 SGH-A400 RF Receive Part Block Diagram



3-3


3-2-2 SGH-A400 RF Transmit Part Block Diagram


3-4

4. SGH-A400 PCB Diagrams

4-1 SGH-A400 Main PCB Top Diagram


4-1

SGH-A400 PCB diagrams

4-2 SGH-A400 Main PCB Bottom Diagram


4-2

5.Flow Chart of Troubleshooting and Circuit Diagram

5-1 SGH-A400 Power ON

‘POWER ON’ does not work

Y

Check the current consumption more than

100 mA

Y

Check the

Battery Voltage more than 3.3V

Y

Check the pin

38 of U400 is more than

3.2 V

Y

U400 pin 33,28,30

= 2.8V

Y

Check the clock signal at R105

Y

Check the initial operation

Y

END

N

N

N

N

N

Download again

Charge the Battery

Check to the path from CN604 to pin

38 of U400 and keypad

Change U400

Check the clock generation circuit

(related to U400 and OSC100)


5-1

SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram

5-2 SGH-A400 Initial

Initial Failure

Y

Check the “Reset_B” signal at the pin 6 of

U8016 is “High”

Y

Check the pin 10 of U400 is “High”

Y

Check the pin 11 of U400 is “High”

Y

Check the connections and initialization using Factory

Test Program

Y

Check LCD connector CN601, and resolder bridge

Y

END

N

N

N

Check the U100 (IA)

Check the U201 (M46)

Check the U400 (PMIC)


5-2

5-3 SGH-A400 Sim Part

Phone can’t access SIM card

Y

Check the pin 1, 5 of

CN400. voltage is 2.8V ?

Y

Check the SIM connector’s CN400

Connection to

SIM card

Y

Check the circuit around U515

(Serial EEPROM) and data stored in it

Y

END

N

N


Check the SIM related circuit of the U400

Resolder CN400

VSYN

VSIM

VTIC

VRF

VOsc

VCCA1

VCCD

23

GND1

45

46

47

POWER_KEY

ALARM_IN

DTR_IN

6

7

8

ENABLE_1

ENABLE_2

ENABLE_3

19

GND_SENSE

44

VBAT

C410

150PF

U400

20 49 50 51 52

35

NC1

NC2

36

37

VBAT1

38

VBAT2

4

NC3

GND3

5

GND2

12

2

RESET_B

PMIC_INTERRUPT

RSS_DATA

9

1

3

ISENP ISENN

7

VCCD

8

1

U8016-1

2

4

VCCD VCCD

R409

4.7K

R407

4.7K

VSIM

2 3

ZD402

1

S_Dat

S_Clk

PMIC_RESET

CN400

1

1

2 2

3

3

G G G

7 8 9 10

4

G

5

6

4

5

6

R410

100

R404

100K

Sim_Reset

Sim_Clk

Sim_Dat

Sim_En

Clk_Rqst


5-3


5-4 SGH-A400 Charging Part

Abnormal charging part

Y

Check the pin 17, 18 of CN604-1 is around 5V

Y

Check the pin 2 of U8021 is “Low”

Y

Check the pin 5, 6 of U8021 is more than 0.5V

Y

Check the

Voltage of pin 5 of

U605 is between 3.2 V and 4.2 V

Y

END

N

N

N

N

Replace TA

Check the U201 using Factory Test Program

Resolder R648, R651, R646

Change U605


5-4

5-5 SGH-A400 Microphone Part

Micro Phone does not work

Y check the connection from MIC600

Y

Audio loopback is enabled by board test program.

R104, R107 2.2 V

Y

END

N

N


Change MIC600

Resolder R104, R107, R103

Mic_Bias

R104

1.1K

Mic+

Mic-

C112

47NF

C113

33PF

C115

47NF

R107

1.1K

C108

33UF

R103

330

C111

22PF

C116

22PF


5-5


5-6 SGH-A400 Speaker Part

Speaker does not work

Y

Check the connection between CN601 and LCD Module connector

Y

Check the connection from CN601 to LCD Module

Y

Check the voltage on the speaker line lands on LCD

Module

Y

Is Speaker working ?

Y

END

N

N

N

Replace Flexible PCB

Change the LCD Module

Replace the Speaker or resolder Speaker


5-6

5-7 SGH-A400 Key Data Input

Check initial operation

Y

Check the connection between

CN602 and Keypad.

Y

Check the pin 1, 3, 4, of CN602 is

“High”

Y

When one of the keys is pushed, one of pin [5:12] of

CN602 is “High”

N

N


Check the M46(U201)

Replace the key PCB

Y

END


5-7


5-8 SGH-A400 Ring Indicator

Ring Indicator does not work

Y


CN602 and Keypad.

Y

Check the Q203 pin 2 is

“High”

Y

Check the Q203 pin 3 is

“Low”

Y

CN602 pin 14 = “L” ?

Y

Key PCB is OK ?

Y

END

N

N

N

N

Check M46(U201) by Factory Test Program

Replace Q203

Resolder CN602

Replace the key PCB


5-8

5-9 SGH-A400 Back Light

Backlight does not work

Y


CN601 and LCD Module.

Y

Backlight

“ON” mode in the menu ?

Y

CN601 pin 3 = “High” ?

Y

Check the connection from CN601 to LCD Module

Y

LCD backlight on ?

Y

END

N

N

N

N


Select backlight “ON” mode

Check M46(U201) using Factory Test Program

Replace flexible PCB

Replace LCD Module


5-9


5-10 SGH-A400 Alert Tone

Abnormal Alert tone

Y

Is there alert wave signal on the

R635 during alert tone test?

Y

Is there alert wave signal on the

Q603 pin3 during alert tone test?

Y

Check the C620

≥

3.3V

Y

Buzzer is ok?

Y

END

N

N

N

N

ALERT by Test S/W

Check the circuit related to Q603

Resolder D601 and C620

Change the Buzzer


5-10


5-11 SGH-A400 GSM Receiver

RX On

RF input : 62 CH

Amp. : -50 dBm

Y

1

2

U505

Pin 9

≥

-65 dBm

Y

U505

Pin 5

≥

-65 dBm

Y

N

3

4

5

6

7

8

N Resolder or Change CN500

Resolder& U505

Pin 5

≥

-65 dBm

Y

N

Check voltage

U505 pins

Pin 2 : L

Pin 4 : H

Pin 8 : H

Pin 10 : L

F501 pin 5

≥

-73 dBm

Y

U507 pin 16, 17

≥

-40 dBm

Y

F301 pin 1, 2, 5, 6

≥

-47 dBm

Y

F300 pin 1

≥

-25 dBm

Y

F300 pin 4

≥

-30 dBm

Y

Check the signal at U300 pin 26, 27

Y

END

N

N

N

N

N

N

Check OSC300 pin 1

≥

-10 dBm

Y

Check D300 pin 1

≥

1V~2.3V

Y

Resolder

F501

N

Change F301

Change U507

N

Change

F300

Change U300

Change

U300


5-11

Change OSC300

Resolder or change

D300


Test Condition of RF Bench Test


5-12

1 RX_62_U505 PIN9


2

RX_62_U505 PIN5


5-13


3 RX_62_F501 PIN5

4 RX_62_U507 PIN16


5-14

5 RX_62_F301 PIN1


6

RX_62_F300 PIN1


5-15


7

RX_62_F300 PIN4

8 U300_ PIN26


5-16


5-12 SGH-A400 GSM Transmit

Tx On (level : 5)

Battery voltage : 3.8 V

Using 20 dB Attenuator

N

1

2

U505

Pin 9

≥

30 dBm

N

U505

Pin 1

≥

30 dBm

N

Y

Y

3

Y

Check voltage

Pin 2 : H

Pin 4 : L

Pin 8 : H

Pin 10 : L

N

Resolder or Change

LAM1

4

LAM1

Pin 3

≥

30 dBm

N

U510 pin 4

≥

0 dBm

N

Y

N

Check

U510 pin14

1V ~ 2V ?

N

Check

OSC300 pin1

≥

-10 dBm

Y

U513 pin 3

1~2.3V ?

Y

U513

Pin 9 : H

Pin 7 : L

Y

Change U513

Y

END

Y

Resolder or Change

U512

Resolder

CN500

Y

Resolder or Change

U505

Resolder or Change

U503, Q501

Y

Change

U510

N

Change

U508

Change OSC300

Change U300


5-17




5-18

1 TX_62_U505 PIN9


2 TX_62_U505 PIN1


5-19


3 TX_62_lam1 PIN3

4 TX_62_U510 PIN4


5-20


5-13 SGH-A400 DCS Receiver

RX On

RF input : 698 CH

Amp. : -50 dBm

Y

1

2

3

4

5

6

7

8

U505

Pin 9

≥

-65 dBm

Y

U505

Pin 7

≥

-65 dBm

Y

N

N

Resolder & U505

Pin 7

≥

-65 dBm

Y

Resolder or Change CN500

N

Check voltage

U505 pins

Pin 2 : L

Pin 4 : H

Pin 8 : H

Pin 10 : L

F500 pin 5

≥

-73 dBm

Y

U507 pin 16, 17

≥

-40 dBm

Y

F301 pin 1, 2, 5, 6

≥

-47 dBm

Y

F300 pin 1

≥

-25 dBm

Y

F300 pin 4

≥

-30 dBm

Y

U300 pin 26, 27

Y

END

N

N

N

N

N

N

Check OSC300 pin 1

≥

-10 dBm

Y

Check D300 pin 1

≥

1 V

Y

Resolder

F500

N

Change OSC300

Change F301

Change U507

N

Change

F300

Resolder or change

D300

Change

U300

Change U300


5-21




5-22

1

RX_698_U505 PIN9


2 RX_698_U505 PIN7


5-23


3 RX_698_F500 PIN5

4

RX_698_U507 PIN16


5-24

5 RX_698_F301 PIN1


6 RX_698_F300 PIN1


5-25


7

RX_698_F300 PIN4

8

U300_ PIN26


5-26


5-14 SGH-A400 DCS Transmit

Tx On (level : 0)

Battery voltage : 3.8 V

Using 20 dB Attenuator

N

1

2

U505

Pin 9

≥

25 dBm

N

U505

Pin 11

≥

25 dBm

N

Y

Y

3

Y

Check voltage

Pin 2 : L

Pin 4 : H

Pin 8 : L

Pin 10 : H

N

Resolder or Change

LAM1

4

LAM1

Pin 1

≥

25 dBm

N

U510 pin 2

≥

0 dBm

N

Y

U513 pin 3

1~2.3V ?

Y

U513

Pin 9 : L

Pin 7 : H

Y

Change U513

Y

END

N

Y

Check

U510 pin14

1V ~ 2V ?

N

Check

OSC300 pin1

≥

-10 dBm

Y

Resolder or Change

U512

Y

Resolder

CN500

Resolder or Change

U505

Resolder or Change

U503, Q501

Y

N

Change

U510

Change

U508

Change OSC300

Change U300


5-27




5-28

1

TX_698_U505 PIN9


2

TX_698_U505 PIN11


5-29


3 TX_698_lam1 PIN1

4

TX_698_U510 PIN2


5-30

ELECTRONICS

©Samsung Electronics Co.,Ltd. August. 2001

Pinted in Korea.

Code No.: GH68-02246A

BASIC.

Samsung SGH-A400 service manual

DUAL BAND GSM

TELEPHONE

SERVICE

Manual

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