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Samsung SGH-A400 Service Manual

Dual band gsm telephone
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SERVICE
DUAL BAND GSM TELEPHONE
DUAL BAND GSM
TELEPHONE
SGH-A400
Manual
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

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Summary of Contents for Samsung SGH-A400

  • Page 1 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...

  • Page 2: Exploded Views And Parts List

    SGH-A400 GSM Telephone Parts List SGH-A400 Travel Adapter SGH-A400 Travel Adapter Parts List SGH-A400 Cigarette Lighter Adaptor SGH-A400 Cigarette Lighter Adapter Parts List 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.
  • Page 3 1. SGH-A400 Exploded View and its Parts List 1-1 SGH-A400 GSM Telephone Exploded View 20-1 20-2 20-3 20-4 SAMSUNG Proprietary-Contents may change without notice...
  • Page 4 SGH-A400 Exploded view and its Part List 1-2 SGH-A400 GSM Telephone Parts List DESCRIPTION SEC.CODE REMARK MEC-FOLDER UPPER GH75-01200A LCD ASS’Y GH07-00084A SPEAKER ASS’Y GH59-00239A VIBRATOR ASS’Y GH31-00030A SHIELD NET GH74-01653A FPCB GH59-00242A HINGE HOLDER ASS’Y GH75-01109B MEC-FOLDER LOWER GH75-01201A...
  • Page 5 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 GH44-00171A CHINA GH44-00184A EUROPE GH44-00171C UNITED KINGDOM Gh44-00171E TAIWAN SAMSUNG Proprietary-Contents may change without notice...
  • Page 6 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 SAMSUNG Proprietary-Contents may change without notice...
  • Page 7 SGH-A400 Exploded view and its Part List 1-7 SGH-A400 Test Jig (GH80-00161A) 1-7-1 SGH-A400 Test Jig Cable 1-7-2 SGH-A400 RF Jig Cable (GH39-00096A) (GH39-00093A) SAMSUNG Proprietary-Contents may change without notice...
  • Page 8 SGH-A400 Exploded view and its Part List 1-7-3 SGH-A400 Test Jig SAMSUNG Proprietary-Contents may change without notice...
  • Page 9 2. SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS Remark GH92-00985A 4302-001119 BAT200 BATTERY-LI(2ND) 3 V, 0.1MAH, -, -, 3.1 V, - 2203-000311 C100 C-CERAMIC, CHIP 0.12 nF, 5 %, 50 V, NP0, TP, 2203-005065 C101 C-CERAMIC, CHIP 1000 nF, +80-20 %, 10 V, Y5 V, TP,...
  • Page 10 C-CERAMIC, CHIP 390 pF, 10 %, 50 V, X7R, TP, - 2203-005481 C332 C-CERAMIC, CHIP 47 nF, 10 %, 10 V, X7R, TP, - 2203-005664 C333 C-CERAMIC, CHIP 4700 nF, 10 %, 6.3 V, X5R, TP, 2012 SAMSUNG Proprietary-Contents may change without notice...

  • Page 11: C-Ceramic, Chip 0.1 Nf, 5 %, 50 V, Np0, Tp

    C-CERAMIC, CHIP 0.1 nF, 5 %, 50 V, NP0, TP, 2203-000438 C501 C-CERAMIC, CHIP 1 nF, 10 %, 50 V, X7R, TP, - 2203-000812 C503 C-CERAMIC, CHIP 0.033 nF, 5 %, 50 V, NP0, TP, SAMSUNG Proprietary-Contents may change without notice...

  • Page 12: C-Ceramic, Chip 0.01 Nf, 0.5 Pf, 50 V, Np0, Tp

    C-CERAMIC, CHIP 0.022 nF, 5 %, 50 V, NP0, TP, 2203-000278 C547 C-CERAMIC, CHIP 0.01 nF, 0.5 pF, 50 V, NP0, TP, 2203-001432 C548 C-CERAMIC, CHIP 47 nF, +80-20 %, 16 V, Y5 V, TP, SAMSUNG Proprietary-Contents may change without notice...
  • Page 13 C-CERAMIC, CHIP 0.033 nF, 5 %, 50 V, NP0, TP, 2203-000812 C639 C-CERAMIC, CHIP 0.033 nF, 5 %, 50 V, NP0, TP, 2203-000812 C640 C-CERAMIC, CHIP 0.033 nF, 5 %, 50 V, NP0, TP, SAMSUNG Proprietary-Contents may change without notice...
  • Page 14 FILTER-SAW 400MHZ, .28MHZ, +-70KHZ, TP, 6.5DB, - 2904-001096 F500 FILTER-SAW 1.8425GHz, 75MHz, +-37.5MHz/2.5dB, 2904-001281 F501 FILTER-SAW 947.5MHz, 25MHz, +-12.5MHz/1.4dB, 2007-007771 F502 R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP, 2703-000310 L100 INDUCTOR-SMD 1.8 uH, 10 %, 0.8x1.6x0.8mm SAMSUNG Proprietary-Contents may change without notice...
  • Page 15 Q601 TR-SMALL SIGNAL 2SB1427, PNP, 500 mW, SOT-89, 0501-002356 Q603 TR-SMALL SIGNAL -, NPN, 250 mW, SOT-323, TP, 0504-001012 Q604 TR-DIGITAL DTC114YE, NPN, 150 mW, 10K/47K, 0504-001012 Q605 TR-DIGITAL DTC114YE, NPN, 150 mW, 10K/47K, SAMSUNG Proprietary-Contents may change without notice...
  • Page 16 R-CHIP 4.7 kohm, 1 %, 1/16 W, DA, TP, 2007-000172 R315 R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP, 2007-001298 R316 R-CHIP 51 ohm, 5 %, 1/16 W, DA, TP, 2007-000172 R317 R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP, SAMSUNG Proprietary-Contents may change without notice...
  • Page 17 R-CHIP 1 Mohm, 5 %, 1/16 W, DA, TP, 2007-007771 R526 R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP, 2007-007095 R527 R-CHIP 390 ohm, 5 %, 1/16 W, DA, TP, 2007-000139 R528 R-CHIP 220 ohm, 5 %, 1/16 W, DA, TP, SAMSUNG Proprietary-Contents may change without notice...
  • Page 18 U330 IC-CMOS LOGIC 7WZ08, 2-INPUT AND GATE, US8, 1203-001703 U400 IC-VOLTAGE REGULATOR 20436, TQFP, 48P, 275MIL, , 1203-002099 U401 IC-VOLTAGE REGULATOR 5245, SOT-23-5, 5P, 64MIL, 0504-001042 U500 TR-DIGITAL BCR10PN, NPN/PNP, 250 mW, 10K/10K, SAMSUNG Proprietary-Contents may change without notice 2-10...
  • Page 19 DIODE-SCHOTTKY RB705D, 20 V, 30 mA, SOT-23, TP 0406-001104 ZD602 DIODE-TVS ESDA6V1-5W6, 6.1/-/7.2 V, 100 W, 0406-001104 ZD604 DIODE-TVS ESDA6V1-5W6, 6.1/-/7.2 V, 100 W, 0406-001104 ZD605 DIODE-TVS ESDA6V1-5W6, 6.1/-/7.2 V, 100 W, GH41-00184A PCB-SGHA400 SGH-A400, FR-4, 6L, -, 0.8T, SAMSUNG Proprietary-Contents may change without notice 2-11...
  • Page 20 3. SGH-A400 Block Diagrams 3-1 SGH-A400 Main Block Diagram SAMSUNG Proprietary-Contents may change without notice...
  • Page 21 SGH-A400 Block Diagrams 3-2 SGH-A400 Main RF Block Diagram SAMSUNG Proprietary-Contents may change without notice...
  • Page 22 SGH-A400 Block Diagrams 3-2-1 SGH-A400 RF Receive Part Block Diagram SAMSUNG Proprietary-Contents may change without notice...
  • Page 23 SGH-A400 Block Diagrams 3-2-2 SGH-A400 RF Transmit Part Block Diagram SAMSUNG Proprietary-Contents may change without notice...
  • Page 24 4. SGH-A400 PCB Diagrams 4-1 SGH-A400 Main PCB Top Diagram SAMSUNG Proprietary-Contents may change without notice...
  • Page 25 SGH-A400 PCB diagrams 4-2 SGH-A400 Main PCB Bottom Diagram SAMSUNG Proprietary-Contents may change without notice...
  • Page 26 38 of U400 and keypad 3.2 V U400 pin 33,28,30 Change U400 = 2.8V Check the clock generation circuit Check the clock signal (related to U400 and OSC100) at R105 Check the initial operation SAMSUNG Proprietary-Contents may change without notice...
  • Page 27 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-2 SGH-A400 Initial Initial Failure Check the “Reset_B” Check the U100 (IA) signal at the pin 6 of U8016 is “High” Check the pin 10 Check the U201 (M46) of U400 is “High”...
  • Page 28 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-3 SGH-A400 Sim Part Phone can’t access SIM card Check the pin 1, 5 of Check the SIM related circuit of the U400 CN400. voltage is 2.8V ? Check the SIM connector’s CN400...
  • Page 29 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-4 SGH-A400 Charging Part Abnormal charging part Check the pin 17, 18 of CN604-1 Replace TA is around 5V Check the U201 Check the pin 2 of U8021 using Factory Test Program is “Low”...
  • Page 30 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-5 SGH-A400 Microphone Part Micro Phone does not work check the connection Change MIC600 from MIC600 Audio loopback is enabled by board test Resolder R104, R107, R103 program. R104, R107 2.2 V...
  • Page 31 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-6 SGH-A400 Speaker Part Speaker does not work Check the connection between CN601 and LCD Module connector Check the connection from CN601 Replace Flexible PCB to LCD Module Check the voltage on the speaker...
  • Page 32 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-7 SGH-A400 Key Data Input Check initial operation Check the connection between CN602 and Keypad. Check the pin 1, 3, 4, of CN602 is Check the M46(U201) “High” When one of the keys is...
  • Page 33 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-8 SGH-A400 Ring Indicator Ring Indicator does not work Check the connection between CN602 and Keypad. Check M46(U201) Check the Q203 pin 2 is by Factory Test Program “High” Check the Q203 pin 3 is Replace Q203 “Low”...
  • Page 34 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-9 SGH-A400 Back Light Backlight does not work Check the connection between CN601 and LCD Module. Backlight “ON” mode in Select backlight “ON” mode the menu ? Check M46(U201) CN601 pin 3 = “High” ?
  • Page 35 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-10 SGH-A400 Alert Tone Abnormal Alert tone Is there alert wave signal on the ALERT by Test S/W R635 during alert tone test? Is there alert wave signal on the Check the circuit related to Q603...
  • Page 36 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-11 SGH-A400 GSM Receiver RX On RF input : 62 CH Amp. : -50 dBm U505 Resolder or Change CN500 Pin 9 -65 dBm Check voltage U505 pins U505 Pin 2 : L Resolder&...
  • Page 37 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test SAMSUNG Proprietary-Contents may change without notice 5-12...
  • Page 38 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram RX_62_U505 PIN9 RX_62_U505 PIN5 SAMSUNG Proprietary-Contents may change without notice 5-13...
  • Page 39 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram RX_62_F501 PIN5 RX_62_U507 PIN16 SAMSUNG Proprietary-Contents may change without notice 5-14...
  • Page 40 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram RX_62_F301 PIN1 RX_62_F300 PIN1 SAMSUNG Proprietary-Contents may change without notice 5-15...
  • Page 41 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram RX_62_F300 PIN4 U300_ PIN26 SAMSUNG Proprietary-Contents may change without notice 5-16...
  • Page 42 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-12 SGH-A400 GSM Transmit Tx On (level : 5) Battery voltage : 3.8 V Using 20 dB Attenuator U505 Resolder Pin 9 CN500 30 dBm Check voltage U505 Pin 2 : H...
  • Page 43 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test SAMSUNG Proprietary-Contents may change without notice 5-18...
  • Page 44 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram TX_62_U505 PIN9 TX_62_U505 PIN1 SAMSUNG Proprietary-Contents may change without notice 5-19...
  • Page 45 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram TX_62_lam1 PIN3 TX_62_U510 PIN4 SAMSUNG Proprietary-Contents may change without notice 5-20...
  • Page 46 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-13 SGH-A400 DCS Receiver RX On RF input : 698 CH Amp. : -50 dBm U505 Resolder or Change CN500 Pin 9 -65 dBm Check voltage U505 pins U505 Resolder & U505...
  • Page 47 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test SAMSUNG Proprietary-Contents may change without notice 5-22...
  • Page 48 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram RX_698_U505 PIN9 RX_698_U505 PIN7 SAMSUNG Proprietary-Contents may change without notice 5-23...
  • Page 49 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram RX_698_F500 PIN5 RX_698_U507 PIN16 SAMSUNG Proprietary-Contents may change without notice 5-24...
  • Page 50 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram RX_698_F301 PIN1 RX_698_F300 PIN1 SAMSUNG Proprietary-Contents may change without notice 5-25...
  • Page 51 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram RX_698_F300 PIN4 U300_ PIN26 SAMSUNG Proprietary-Contents may change without notice 5-26...
  • Page 52 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-14 SGH-A400 DCS Transmit Tx On (level : 0) Battery voltage : 3.8 V Using 20 dB Attenuator U505 Resolder Pin 9 CN500 25 dBm Check voltage U505 Pin 2 : L...
  • Page 53 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test SAMSUNG Proprietary-Contents may change without notice 5-28...
  • Page 54 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram TX_698_U505 PIN9 TX_698_U505 PIN11 SAMSUNG Proprietary-Contents may change without notice 5-29...
  • Page 55 SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram TX_698_lam1 PIN1 TX_698_U510 PIN2 SAMSUNG Proprietary-Contents may change without notice 5-30...
  • Page 56 ELECTRONICS ©Samsung Electronics Co.,Ltd. August. 2001 Pinted in Korea. Code No.: GH68-02246A BASIC.