Samsung SGH-A400 Service Manual Download

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SERVICE

DUAL BAND GSM
TELEPHONE

SGH-A400

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

Summary of Contents for SGH-A400

Page 1: ...UAL BAND GSM TELEPHONE SGH A400 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 ...

Page 2: ...t 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 RF 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 I...

Page 3: ...tary Contents may change without notice 1 2 1 SGH A400 Exploded View and its Parts List 1 1 SGH A400 GSM Telephone Exploded View 1 2 2 1 2 3 4 5 6 8 3 11 12 13 18 9 10 14 15 16 17 20 7 19 21 20 1 20 2 20 3 20 4 22 2 2 ...

Page 4: ...NA LOCKER REAR COVER COVER EARPHONE WINDOW IrDA SCREW MACHINE BATTERY 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 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 0...

Page 5: ...thout notice 1 4 SGH A400 Exploded view and its Part List 1 3 SGH A400 Travel Adapter 1 4 SGH A400 Travel Adapter Parts List TYPE SEC CODE REMARK A GH44 00171A CHINA B GH44 00184A EUROPE C GH44 00171C UNITED KINGDOM D Gh44 00171E TAIWAN A B C D ...

Page 6: ... change without notice 1 5 SGH A400 Exploded view and its Part List 1 5 SGH A400 Cigarette Lighter Adaptor 1 6 SGH A400 Cigarette Lighter Adapter Parts List DESCRIPTION SEC CODE REMARK Cigarette Lighter Adapter Code GH44 00195A BLACK ...

Page 7: ... Proprietary Contents may change without notice 1 6 SGH A400 Exploded view and its Part List 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 ...

Page 8: ...tary Contents may change without notice 1 7 SGH A400 Exploded view and its Part List 1 7 3 SGH A400 Test Jig 8922 or 8960 WIRELESS COMMUNICATIONS TEST SET TEST JIG DC POWER SUPPLY RF JIG CABLE TEST JIG CABLE 232 CABLE ...

Page 9: ...20 16 V Y5 V TP 1 2203 001432 C115 C CERAMIC CHIP 47 nF 80 20 16 V Y5 V TP 1 2203 000628 C116 C CERAMIC CHIP 0 022 nF 5 50 V NP0 TP 1 2203 000812 C117 C CERAMIC CHIP 0 033 nF 5 50 V NP0 TP 1 2203 005571 C118 C CERAMIC CHIP 10000 nF 80 20 6 3 V Y5 V 1 2203 005061 C119 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1 2203 005061 C120 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1 2203 001432 C121 C CERAMIC CH...

Page 10: ...312 C FILM CHIP 10 nF 5 16 V TP 2012 1 2404 001105 C313 C TA CHIP 10 uF 20 6 3 V GP TP 2012 1 2203 000940 C314 C CERAMIC CHIP 470 pF 10 50 V X7R TP 1 2203 000812 C315 C CERAMIC CHIP 0 033 nF 5 50 V NP0 TP 1 2203 000254 C316 C CERAMIC CHIP 10 nF 10 16 V X7R TP 1 2203 000254 C317 C CERAMIC CHIP 10 nF 10 16 V X7R TP 1 2203 000836 C318 C CERAMIC CHIP 390 pF 10 50 V X7R TP 1 2203 005664 C319 C CERAMIC ...

Page 11: ...16 V Y5 V TP 1 2203 005065 C403 C CERAMIC CHIP 1000 nF 80 20 10 V Y5 V TP 1 2203 005065 C404 C CERAMIC CHIP 1000 nF 80 20 10 V Y5 V TP 1 2203 005664 C405 C CERAMIC CHIP 4700 nF 10 6 3 V X5R TP 2012 1 2203 005664 C406 C CERAMIC CHIP 4700 nF 10 6 3 V X5R TP 2012 1 2203 005065 C408 C CERAMIC CHIP 1000 nF 80 20 10 V Y5 V TP 1 2203 000995 C409 C CERAMIC CHIP 0 047 nF 5 50 V NP0 TP 1 2203 000359 C410 C ...

Page 12: ...0 6 3 V WT TP 3 3x2 7x 1 2203 005148 C522 C CERAMIC CHIP 100 nF 10 16 V X7R TP 1608 1 2203 000628 C525 C CERAMIC CHIP 0 022 nF 5 50 V NP0 TP 1 2203 000233 C526 C CERAMIC CHIP 0 1 nF 5 50 V NP0 TP 1 2203 000812 C527 C CERAMIC CHIP 0 033 nF 5 50 V NP0 TP 1 2203 000233 C530 C CERAMIC CHIP 0 1 nF 5 50 V NP0 TP 1 2203 000233 C532 C CERAMIC CHIP 0 1 nF 5 50 V NP0 TP 1 2203 000812 C533 C CERAMIC CHIP 0 0...

Page 13: ...33 nF 5 50 V NP0 TP 1 2404 001151 C613 C TA CHIP 33 uF 20 6 3 V LZ TP 3216 1 2203 000812 C614 C CERAMIC CHIP 0 033 nF 5 50 V NP0 TP 1 2203 005065 C615 C CERAMIC CHIP 1000 nF 80 20 10 V Y5 V TP 1 2203 000812 C616 C CERAMIC CHIP 0 033 nF 5 50 V NP0 TP 1 2203 005061 C617 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1 2203 005061 C618 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1 2203 000628 C620 C CERAMIC C...

Page 14: ...33 nF 5 50 V NP0 TP 1 2203 000812 C667 C CERAMIC CHIP 0 033 nF 5 50 V NP0 TP 1 2203 000438 C670 C CERAMIC CHIP 1 nF 10 50 V X7R TP 1 2203 000812 C671 C CERAMIC CHIP 0 033 nF 5 50 V NP0 TP 1 3709 001190 CN400 CONNECTOR CARD EDGE 6P 2 54MM SMD 1 3705 001178 CN500 CONNECTOR COAXIAL SMC JACK 100 Mohm 1 3722 001530 CN600 JACK PHONE 5P 2 6PI A uF BLK 1 3710 001585 CN601 CONNECTOR SOCKET 20P 2R 0 5mm SMD...

Page 15: ...8MM 1 2703 001514 L507 INDUCTOR SMD 68 nH 5 1 8x1 12x1 02mm 1 2703 000175 L600 INDUCTOR SMD 270 nH 10 0 8x1 6x0 8mm 1 3301 001208 L602 CORE FERRITE BEAD AB 1 6x0 8x0 8mm 1 2703 002298 L603 INDUCTOR SMD 8 2 nH æ10 1 6X0 8X0 8MM 1 4709 001144 LAM1 COUPLER DIRECTION 897 5 1747 5MHZ 1 0604 001146 LED600 PHOTO IRDA 875NM 500 mW 30DEG TP 1 2801 003695 OSC100 CRYSTAL SMD 19 5MHz 10ppm 28 ABK 10 2pF 20 1 ...

Page 16: ...A TP 1 2007 007771 R217 R CHIP 0 ohm 5 1 16 W DA TP 1 2007 000170 R218 R CHIP 1 Mohm 5 1 16 W DA TP 1 2007 000140 R219 R CHIP 1 kohm 5 1 16 W DA TP 1 2007 007771 R280 R CHIP 0 ohm 5 1 16 W DA TP 1 2007 001288 R300 R CHIP 18 ohm 5 1 16 W DA TP 1 2007 001288 R301 R CHIP 18 ohm 5 1 16 W DA TP 1 2007 001323 R302 R CHIP 3 kohm 5 1 16 W DA TP 1 2007 000172 R303 R CHIP 10 ohm 5 1 16 W DA TP 1 2007 000172...

Page 17: ...2007 007193 R507 R CHIP 5 1 ohm 5 1 16 W DA TP 1 2007 001298 R508 R CHIP 51 ohm 5 1 16 W DA TP 1 2007 007193 R509 R CHIP 5 1 ohm 5 1 16 W DA TP 1 2007 000148 R510 R CHIP 10 kohm 5 1 16 W DA TP 1 2007 000137 R511 R CHIP 2 kohm 5 1 16 W DA TP 1 2007 007142 R512 R CHIP 10 kohm 1 1 16 W DA TP 1 2007 007312 R513 R CHIP 20 kohm 1 1 16 W DA TP 1 2007 001308 R514 R CHIP 200 ohm 5 1 16 W DA TP 1 2007 00714...

Page 18: ...W DA TP 1 2007 001119 R620 R CHIP 680 ohm 5 1 16 W DA TP 1 2007 001339 R621 R CHIP 180 kohm 5 1 16 W DA TP 1 2007 001306 R635 R CHIP 150 ohm 5 1 16 W DA TP 1 2007 007316 R637 R CHIP 3 3 kohm 1 1 16 W DA TP 1 2007 000140 R638 R CHIP 1 kohm 5 1 16 W DA TP 1 2007 000140 R639 R CHIP 1 kohm 5 1 16 W DA TP 1 2007 000140 R640 R CHIP 1 kohm 5 1 16 W DA TP 1 2007 000162 R641 R CHIP 100 kohm 5 1 16 W DA TP ...

Page 19: ...R DIGITAL UMD9N NPN PNP 150 mW 4 7 UMT6 TP 1 1201 001753 U605 IC OP AMP MSOP TP 8P 118MIL DUAL 1 0506 001052 U8021 TR ARRAY UMH9N NPN 2 150 mW SC 88 TP 68 1 0406 001104 U8022 DIODE TVS ESDA6V1 5W6 6 1 7 2 V 100 W 1 3711 004916 U8024 CONNECTOR HEADER 3P 2 5MM SMD A 1 2203 005509 U8028 C CERAMIC CHIP 330 nF 80 20 10 V Y5 V TP 1 1203 002127 U8031 IC BATTERY 1734 SOT 23 6P 150MIL PLASTIC 1 1405 001087...

Page 20: ...SAMSUNG Proprietary Contents may change without notice 3 1 3 SGH A400 Block Diagrams 3 1 SGH A400 Main Block Diagram ...

Page 21: ...SAMSUNG Proprietary Contents may change without notice 3 2 SGH A400 Block Diagrams 3 2 SGH A400 Main RF Block Diagram ...

Page 22: ...SAMSUNG Proprietary Contents may change without notice 3 3 SGH A400 Block Diagrams 3 2 1 SGH A400 RF Receive Part Block Diagram ...

Page 23: ...SAMSUNG Proprietary Contents may change without notice 3 4 SGH A400 Block Diagrams 3 2 2 SGH A400 RF Transmit Part Block Diagram ...

Page 24: ...SAMSUNG Proprietary Contents may change without notice 4 1 4 SGH A400 PCB Diagrams 4 1 SGH A400 Main PCB Top Diagram ...

Page 25: ...SAMSUNG Proprietary Contents may change without notice 4 2 SGH A400 PCB diagrams 4 2 SGH A400 Main PCB Bottom Diagram ...

Page 26: ...onsumption more than 100 mA Download again N Y Check the Battery Voltage more than 3 3V Charge the Battery N Y Check the pin 38 of U400 is more than 3 2 V Check to the path from CN604 to pin 38 of U400 and keypad N Y U400 pin 33 28 30 2 8V Change U400 N Y END Y Check the clock signal at R105 Check the clock generation circuit related to U400 and OSC100 Check the initial operation ...

Page 27: ...itial N Initial Failure Y Y Check the Reset_B signal at the pin 6 of U8016 is High Check the U100 IA N Y Check the pin 10 of U400 is High Check the U201 M46 N Y Check the pin 11 of U400 is High Check the U400 PMIC Y Check the connections and initialization using Factory Test Program END Y Check LCD connector CN601 and resolder bridge ...

Page 28: ...00 VCCD VTIC VSIM VSW1 24 25 VSW2 VCCD ISENP 100K R404 ZD402 R407 4 7K VBAT 10 G ISENN VCCD R409 3 2 1 VSIM U8016 1 4 1 2 8 7 4 7K VOUT_1A 30 VOUT_2 VOUT_3 28 31 VOUT_4A VOUT_4B 32 29 VOUT_5 VOUT_6 27 43 VOUT_7 VOUT_8 48 VREF_CAP 44 VSUB_P 20 17 18 SIM_CLK_M46 SIM_DATA_CARD 15 SIM_DATA_M46 16 14 SIM_ENABLE 21 SIM_RST_CARD SIM_RST_M46 22 VBAT1 37 38 VBAT2 VBOOST 39 VOUT1B 34 33 35 NC1 NC2 36 NC3 4 ...

Page 29: ...rging part Y N Y Check the pin 17 18 of CN604 1 is around 5V Replace TA N Y Check the pin 2 of U8021 is Low Check the U201 using Factory Test Program N Y Check the pin 5 6 of U8021 is more than 0 5V Resolder R648 R651 R646 N Y Check the Voltage of pin 5 of U605 is between 3 2 V and 4 2 V Change U605 END 5 4 SGH A400 Charging Part ...

Page 30: ...gram Mic C113 Mic Mic_Bias 22PF 1 1K R103 330 C108 33UF R104 C111 22PF C116 C115 47NF C112 47NF 1 1K R107 33PF 5 5 SGH A400 Microphone Part Micro Phone does not work Y N Y check the connection from MIC600 Change MIC600 N Y Audio loopback is enabled by board test program R104 R107 2 2 V Resolder R104 R107 R103 END ...

Page 31: ... does not work Y Y N Y Check the connection from CN601 to LCD Module Replace Flexible PCB N Y Check the voltage on the speaker line lands on LCD Module Change the LCD Module N Y Is Speaker working Replace the Speaker or resolder Speaker END 5 6 SGH A400 Speaker Part Check the connection between CN601 and LCD Module connector ...

Page 32: ...ubleshooting and Circuit Diagram 5 7 SGH A400 Key Data Input Check initial operation Y Y N Y Check the pin 1 3 4 of CN602 is High Check the M46 U201 N Y When one of the keys is pushed one of pin 5 12 of CN602 is High Replace the key PCB END Check the connection between CN602 and Keypad ...

Page 33: ...t Diagram 5 8 SGH A400 Ring Indicator Ring Indicator does not work Y Y N Y Check the Q203 pin 2 is High Check M46 U201 by Factory Test Program N Y Check the Q203 pin 3 is Low Replace Q203 N Y CN602 pin 14 L Resolder CN602 N Y Key PCB is OK Replace the key PCB END Check the connection between CN602 and Keypad ...

Page 34: ...400 Back Light Backlight does not work Y Y N Y Backlight ON mode in the menu Select backlight ON mode N Y CN601 pin 3 High Check M46 U201 using Factory Test Program N Y Check the connection from CN601 to LCD Module Replace flexible PCB N Y LCD backlight on Replace LCD Module END Check the connection between CN601 and LCD Module ...

Page 35: ...5 10 SGH A400 Alert Tone Abnormal Alert tone Y N Y Is there alert wave signal on the R635 during alert tone test ALERT by Test S W N Y Is there alert wave signal on the Q603 pin3 during alert tone test Check the circuit related to Q603 N Y Check the C620 3 3V Resolder D601 and C620 N Y Buzzer is ok Change the Buzzer END ...

Page 36: ...73 dBm Resolder F501 N Y F300 pin 4 30 dBm Change F300 N Y Check the signal at U300 pin 26 27 Change U300 N Y U505 Pin 5 65 dBm N Y Resolder U505 Pin 5 65 dBm Check voltage U505 pins Pin 2 L Pin 4 H Pin 8 H Pin 10 L N Y U507 pin 16 17 40 dBm Y Check OSC300 pin 1 10 dBm Change OSC300 Change U507 Y Change U300 END N N Y F301 pin 1 2 5 6 47 dBm Change F301 N Y F300 pin 1 25 dBm Check D300 pin 1 1V 2 ...

Page 37: ...SAMSUNG Proprietary Contents may change without notice 5 12 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test ...

Page 38: ...SAMSUNG Proprietary Contents may change without notice 5 13 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram RX_62_U505 PIN9 1 RX_62_U505 PIN5 2 ...

Page 39: ...SAMSUNG Proprietary Contents may change without notice 5 14 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram RX_62_F501 PIN5 3 RX_62_U507 PIN16 4 ...

Page 40: ...SAMSUNG Proprietary Contents may change without notice 5 15 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram RX_62_F300 PIN1 RX_62_F301 PIN1 5 6 ...

Page 41: ...SAMSUNG Proprietary Contents may change without notice 5 16 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram RX_62_F300 PIN4 7 U300_ PIN26 8 ...

Page 42: ... 9 30 dBm Resolder CN500 LAM1 Pin 3 30 dBm Resolder or Change LAM1 Y Y Y Change U510 END Y N Y Change OSC300 N N N U510 pin 4 0 dBm Y Resolder or Change U505 Y N U505 Pin 1 30 dBm N N Resolder or Change U503 Q501 Y Resolder or Change U512 Y Change U300 N Change U508 Check voltage Pin 2 H Pin 4 L Pin 8 H Pin 10 L U513 Pin 9 H Pin 7 L U513 pin 3 1 2 3V Check OSC300 pin1 10 dBm Check U510 pin14 1V 2V...

Page 43: ...SAMSUNG Proprietary Contents may change without notice 5 18 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test ...

Page 44: ...SAMSUNG Proprietary Contents may change without notice 5 19 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram TX_62_U505 PIN9 TX_62_U505 PIN1 2 1 ...

Page 45: ...SAMSUNG Proprietary Contents may change without notice 5 20 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram TX_62_lam1 PIN3 3 TX_62_U510 PIN4 4 ...

Page 46: ... F500 pin 5 73 dBm Resolder F500 N Y F300 pin 4 30 dBm Change F300 N Y U300 pin 26 27 Change U300 N Y U505 Pin 7 65 dBm N Y Resolder U505 Pin 7 65 dBm Check voltage U505 pins Pin 2 L Pin 4 H Pin 8 H Pin 10 L N Y U507 pin 16 17 40 dBm Y Check OSC300 pin 1 10 dBm Change OSC300 Change U507 Y Change U300 END N N Y F301 pin 1 2 5 6 47 dBm Change F301 N Y F300 pin 1 25 dBm Check D300 pin 1 1 V Resolder ...

Page 47: ...SAMSUNG Proprietary Contents may change without notice 5 22 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test ...

Page 48: ...SAMSUNG Proprietary Contents may change without notice 5 23 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram RX_698_U505 PIN9 1 RX_698_U505 PIN7 2 ...

Page 49: ...SAMSUNG Proprietary Contents may change without notice 5 24 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram RX_698_U507 PIN16 RX_698_F500 PIN5 3 4 ...

Page 50: ...SAMSUNG Proprietary Contents may change without notice 5 25 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram RX_698_F300 PIN1 6 RX_698_F301 PIN1 5 ...

Page 51: ...SAMSUNG Proprietary Contents may change without notice 5 26 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram RX_698_F300 PIN4 7 U300_ PIN26 8 ...

Page 52: ... 9 25 dBm Resolder CN500 LAM1 Pin 1 25 dBm Resolder or Change LAM1 Y Y Y Change U510 END Y N Y Change OSC300 N N N U510 pin 2 0 dBm Y Resolder or Change U505 Y N U505 Pin 11 25 dBm N N Resolder or Change U503 Q501 Y Resolder or Change U512 Y Change U300 N Change U508 Check voltage Pin 2 L Pin 4 H Pin 8 L Pin 10 H U513 Pin 9 L Pin 7 H U513 pin 3 1 2 3V Check OSC300 pin1 10 dBm Check U510 pin14 1V 2...

Page 53: ...SAMSUNG Proprietary Contents may change without notice 5 28 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test ...

Page 54: ...SAMSUNG Proprietary Contents may change without notice 5 29 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram TX_698_U505 PIN11 2 TX_698_U505 PIN9 1 ...

Page 55: ...SAMSUNG Proprietary Contents may change without notice 5 30 SGH A400 Flow Chart of Troubleshooting and Circuit Diagram TX_698_U510 PIN2 4 TX_698_lam1 PIN1 3 ...

Page 56: ... Samsung Electronics Co Ltd August 2001 Pinted in Korea Code No GH68 02246A BASIC ELECTRONICS ...

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