DUAL BAND GSM TELEPHONE SGH-A400 SERVICE DUAL BAND GSM TELEPHONE Manual CONTENTS 1. Exploded Views and Parts List 2. Electrical Parts List 3. Block Diagrams 4. PCB Diagrams 5.
1. Exploded Views and Parts List 1-1 1-2 1-3 1-4 1-5 1-6 1-7 SGH-A400 SGH-A400 SGH-A400 SGH-A400 SGH-A400 SGH-A400 SGH-A400 GSM Telephone Exploded View GSM Telephone Parts List Travel Adapter Travel Adapter Parts List Cigarette Lighter Adaptor Cigarette Lighter Adapter Parts List 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 3-2 Main Block Diagram Main RF 3-2-1 RF Tx Part 3-2-2 RF Rx Part 4.
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SGH-A400 Exploded view and its Part List 1-2 SGH-A400 GSM Telephone Parts List NO DESCRIPTION SEC.
SGH-A400 Exploded view and its Part List 1-3 SGH-A400 Travel Adapter A B D C 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 SAMSUNG Proprietary-Contents may change without notice 1-4
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 1-5
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) SAMSUNG Proprietary-Contents may change without notice 1-6
SGH-A400 Exploded view and its Part List 1-7-3 SGH-A400 Test Jig DC POWER SUPPLY 8922 or 8960 WIRELESS COMMUNICATIONS TEST SET RF JIG CABLE TES T JI G 232 CABLE TEST JIG CABLE SAMSUNG Proprietary-Contents may change without notice 1-7
2. SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 0 GH92-00985A 1 4302-001119 BAT200 BATTERY-LI(2ND) 3 V, 0.1MAH, -, -, 3.1 V, - 1 2203-000311 C100 C-CERAMIC, CHIP 0.12 nF, 5 %, 50 V, NP0, TP, 1 2203-005065 C101 C-CERAMIC, CHIP 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1 2203-000330 C102 C-CERAMIC, CHIP 0.012 nF, 5 %, 50 V, NP0, TP, 1 2203-005571 C103 C-CERAMIC, CHIP 10000 nF, +80-20 %, 6.3 V, Y5 V, 1 2203-000359 C104 C-CERAMIC, CHIP 0.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 2203-005509 C212 C-CERAMIC, CHIP 330 nF, +80-20 %, 10 V, Y5 V, TP, 1 2203-005061 C213 C-CERAMIC, CHIP 100 nF, +80-20 %, 16 V, Y5 V, TP, 1 2203-005061 C214 C-CERAMIC, CHIP 100 nF, +80-20 %, 16 V, Y5 V, TP, 1 2203-005061 C280 C-CERAMIC, CHIP 100 nF, +80-20 %, 16 V, Y5 V, TP, 1 2203-000233 C300 C-CERAMIC, CHIP 0.1 nF, 5 %, 50 V, NP0, TP, 1 2203-000233 C301 C-CERAMIC, CHIP 0.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 2203-000386 C334 C-CERAMIC, CHIP 0.015 nF, 5 %, 50 V, NP0, TP, 1 2203-000812 C335 C-CERAMIC, CHIP 0.033 nF, 5 %, 50 V, NP0, TP, 1 2301-001230 C336 C-FILM, CHIP 10 nF, 5 %, 16 V, TP, 2012, - 1 2203-005158 C337 C-CERAMIC, CHIP 0.0022 nF, 0.25pF, 50 V, NP0, TP, 1 2203-005158 C338 C-CERAMIC, CHIP 0.0022 nF, 0.25pF, 50 V, NP0, TP, 1 2203-000812 C339 C-CERAMIC, CHIP 0.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 2203-000233 C504 C-CERAMIC, CHIP 0.1 nF, 5 %, 50 V, NP0, TP, 1 2203-000233 C505 C-CERAMIC, CHIP 0.1 nF, 5 %, 50 V, NP0, TP, 1 2203-000278 C506 C-CERAMIC, CHIP 0.01 nF, 0.5 pF, 50 V, NP0, TP, 1 2203-005056 C507 C-CERAMIC, CHIP 0.0068 nF, 0.25 pF, 50 V, NP0, TP, 1 2203-000233 C508 C-CERAMIC, CHIP 0.1 nF, 5 %, 50 V, NP0, TP, 1 2203-000233 C509 C-CERAMIC, CHIP 0.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 2203-005065 C549 C-CERAMIC, CHIP 1000 nF, +80-20 %, 10 V, Y5 V, TP, 1 2007-007771 C550 R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP, 1 2203-005509 C551 C-CERAMIC, CHIP 330 nF, +80-20 %, 10 V, Y5 V, TP, 1 2203-000725 C552 C-CERAMIC, CHIP 3.9 nF, 10 %, 50 V, X7R, TP, - 1 2203-005509 C553 C-CERAMIC, CHIP 330 nF, +80-20 %, 10 V, Y5 V, TP, 1 2203-000812 C600 C-CERAMIC, CHIP 0.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 2203-000812 C641 C-CERAMIC, CHIP 0.033 nF, 5 %, 50 V, NP0, TP, 1 2203-000812 C642 C-CERAMIC, CHIP 0.033 nF, 5 %, 50 V, NP0, TP, 1 2203-000812 C643 C-CERAMIC, CHIP 0.033 nF, 5 %, 50 V, NP0, TP, 1 2203-000812 C644 C-CERAMIC, CHIP 0.033 nF, 5 %, 50 V, NP0, TP, 1 2203-000812 C647 C-CERAMIC, CHIP 0.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 2703-001543 L300 INDUCTOR-SMD 33 nH, 5 %, 1.8x1.12x1.02mm 1 2703-001513 L301 INDUCTOR-SMD 100 nH, 5 %, 1.8x1.12x1.02mm 1 2703-002214 L302 INDUCTOR-SMD 8.2 nH, 5 %, 1.6X0.8X0.8MM 1 2703-001513 L303 INDUCTOR-SMD 100 nH, 5 %, 1.8x1.12x1.02mm 1 2703-001545 L304 INDUCTOR-SMD 47 nH, 5 %, 1.8x1.12x1.02mm 1 2703-001543 L305 INDUCTOR-SMD 33 nH, 5 %, 1.8x1.12x1.02mm 1 2703-001547 L306 INDUCTOR-SMD 10 nH, 5 %, 1.8x1.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 2007-000140 R100 R-CHIP 1 kohm, 5 %, 1/16 W, DA, TP, 1 2007-000140 R101 R-CHIP 1 kohm, 5 %, 1/16 W, DA, TP, 1 2007-001313 R103 R-CHIP 330 ohm, 5 %, 1/16 W, DA, TP, 1 2007-007092 R104 R-CHIP 1.1 kohm, 5 %, 1/16 W, DA, TP, 1 2007-000775 R105 R-CHIP 33 kohm, 5 %, 1/16 W, DA, TP, 1 2007-007468 R106 R-CHIP 121 kohm, 1 %, 1/16 W, DA, TP, 1 2007-007092 R107 R-CHIP 1.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 2007-000172 R318 R-CHIP 10 ohm, 5 %, 1/16 W, DA, TP, 1 2007-007771 R403 R-CHIP 0 ohm, 5 %, 1/16 W, DA, TP, 1 2007-000162 R404 R-CHIP 100 kohm, 5 %, 1/16 W, DA, TP, 1 2007-000143 R407 R-CHIP 4.7 kohm, 5 %, 1/16 W, DA, TP, 1 2007-000143 R409 R-CHIP 4.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 2007-000140 R529 R-CHIP 1 kohm, 5 %, 1/16 W, DA, TP, 1 2007-000148 R530 R-CHIP 10 kohm, 5 %, 1/16 W, DA, TP, 1 2007-000145 R531 R-CHIP 6.2 kohm, 5 %, 1/16 W, DA, TP, 1 2007-008117 R532 R-CHIP 2.
SGH-A400 Electrical Parts List Level SEC CODE REFERENCE DESCRIPTIONS 1 0504-001042 U501 TR-DIGITAL BCR10PN, NPN/PNP, 250 mW, 10K/10K, 1 0504-001042 U502 TR-DIGITAL BCR10PN, NPN/PNP, 250m W, 10K/10K, 1 0504-001012 U503 TR-DIGITAL DTC114YE, NPN, 150 mW, 10K/47K, 1 2909-001152 U505 FILTER-DUPLEXER 942.5MHZ, 897.5MHZ, 1/1.
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SGH-A400 Block Diagrams 3-2 SGH-A400 Main RF Block Diagram SAMSUNG Proprietary-Contents may change without notice 3-2
SGH-A400 Block Diagrams 3-2-1 SGH-A400 RF Receive Part Block Diagram SAMSUNG Proprietary-Contents may change without notice 3-3
SGH-A400 Block Diagrams 3-2-2 SGH-A400 RF Transmit Part Block Diagram SAMSUNG Proprietary-Contents may change without notice 3-4
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SGH-A400 PCB diagrams 4-2 SGH-A400 Main PCB Bottom Diagram SAMSUNG Proprietary-Contents may change without notice 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 N Download again N Charge the Battery N Check to the path from CN604 to pin 38 of U400 and keypad N Change U400 N Check the clock generation circuit (related to U400 and OSC100) 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.
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” N Check the U100 (IA) N Check the U201 (M46) N Check the U400 (PMIC) 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 SAMSUNG Proprietary-Contents may change without notice 5-2
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-3 SGH-A400 Sim Part Phone can’t access SIM card Y Check the pin 1, 5 of CN400. voltage is 2.8V ? Check the SIM related circuit of the U400 N Y Check the SIM connector’s CN400 Connection to SIM card Resolder CN400 N Y Check the circuit around U515 (Serial EEPROM) and data stored in it Y END VBAT VCCD VCCD C410 150PF R409 4.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-4 SGH-A400 Charging Part Abnormal charging part Y Check the pin 17, 18 of CN604-1 is around 5V N Replace TA N Check the U201 using Factory Test Program N Resolder R648, R651, R646 N Change U605 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.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-5 SGH-A400 Microphone Part Micro Phone does not work Y check the connection from MIC600 N Change MIC600 N Resolder R104, R107, R103 Y Audio loopback is enabled by board test program. R104, R107 2.2 V Y END Mic_Bias R104 1.1K R103 330 C108 33UF C112 47NF C111 22PF Mic+ C113 33PF C115 47NF C116 22PF MicR107 1.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 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 N Replace Flexible PCB N Change the LCD Module N Replace the Speaker or resolder Speaker Y Check the voltage on the speaker line lands on LCD Module Y Is Speaker working ? Y END SAMSUNG Proprietary-Contents may change without notice 5-6
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-7 SGH-A400 Key Data Input Check initial operation Y Check the connection between CN602 and Keypad.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-8 SGH-A400 Ring Indicator Ring Indicator does not work Y Check the connection between CN602 and Keypad.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-9 SGH-A400 Back Light Backlight does not work Y Check the connection between CN601 and LCD Module.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-10 SGH-A400 Alert Tone Abnormal Alert tone Y Is there alert wave signal on the R635 during alert tone test? N ALERT by Test S/W N Check the circuit related to Q603 N Resolder D601 and C620 N Change the Buzzer Y Is there alert wave signal on the Q603 pin3 during alert tone test? Y Check the C620 ≥ 3.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-11 SGH-A400 GSM Receiver RX On RF input : 62 CH Amp.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test SAMSUNG Proprietary-Contents may change without notice 5-12
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 1 RX_62_U505 PIN9 2 RX_62_U505 PIN5 SAMSUNG Proprietary-Contents may change without notice 5-13
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 3 RX_62_F501 PIN5 4 RX_62_U507 PIN16 SAMSUNG Proprietary-Contents may change without notice 5-14
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5 RX_62_F301 PIN1 6 RX_62_F300 PIN1 SAMSUNG Proprietary-Contents may change without notice 5-15
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 7 RX_62_F300 PIN4 8 U300_ PIN26 SAMSUNG Proprietary-Contents may change without notice 5-16
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 N 1 U505 Pin 9 ≥ 30 dBm Resolder CN500 Y N 2 U505 Pin 1 ≥ 30 dBm Y Check voltage Pin 2 : H Pin 4 : L Pin 8 : H Pin 10 : L Resolder or Change U505 Y N N 3 LAM1 Pin 3 ≥ 30 dBm Y Resolder or Change LAM1 Y Check U510 pin14 1V ~ 2V ? Resolder or Change U503, Q501 N 4 U510 pin 4 ≥ 0 dBm N U513 pin 3 1~2.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test SAMSUNG Proprietary-Contents may change without notice 5-18
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 1 TX_62_U505 PIN9 2 TX_62_U505 PIN1 SAMSUNG Proprietary-Contents may change without notice 5-19
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 3 TX_62_lam1 PIN3 4 TX_62_U510 PIN4 SAMSUNG Proprietary-Contents may change without notice 5-20
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5-13 SGH-A400 DCS Receiver RX On RF input : 698 CH Amp.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test SAMSUNG Proprietary-Contents may change without notice 5-22
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 1 RX_698_U505 PIN9 2 RX_698_U505 PIN7 SAMSUNG Proprietary-Contents may change without notice 5-23
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 3 RX_698_F500 PIN5 4 RX_698_U507 PIN16 SAMSUNG Proprietary-Contents may change without notice 5-24
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 5 RX_698_F301 PIN1 6 RX_698_F300 PIN1 SAMSUNG Proprietary-Contents may change without notice 5-25
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 7 RX_698_F300 PIN4 8 U300_ PIN26 SAMSUNG Proprietary-Contents may change without notice 5-26
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 N 1 U505 Pin 9 ≥ 25 dBm Resolder CN500 Y N 2 U505 Pin 11 ≥ 25 dBm Y Check voltage Pin 2 : L Pin 4 : H Pin 8 : L Pin 10 : H Y Resolder or Change U505 N N 3 LAM1 Pin 1 ≥ 25 dBm Y Resolder or Change LAM1 Y Check U510 pin14 1V ~ 2V ? Resolder or Change U503, Q501 N 4 U510 pin 2 ≥ 0 dBm N U513 pin 3 1~2.
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram Test Condition of RF Bench Test SAMSUNG Proprietary-Contents may change without notice 5-28
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 1 TX_698_U505 PIN9 2 TX_698_U505 PIN11 SAMSUNG Proprietary-Contents may change without notice 5-29
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram 3 TX_698_lam1 PIN1 4 TX_698_U510 PIN2 SAMSUNG Proprietary-Contents may change without notice 5-30
ELECTRONICS ©Samsung Electronics Co.,Ltd. August. 2001 Pinted in Korea. Code No.: GH68-02246A BASIC.
