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Samsung SGH-A288 Service Manual

Dual band mobile cellular phone
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Download this manual See also: Owner's Manual
ELECTRONICS
SERVICE
DUAL BAND MOBILE CELLULAR PHONE
DUAL BAND Mobile
Cellular Phone
SGH-A288
Manual
CONTENTS
1. Exploded Views and Parts List
2. PCB Diagrams
3. Electrical Parts List
4. Block Diagrams
5. Flow chart of trouble shooting

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Summary of Contents for Samsung SGH-A288

  • Page 1 DUAL BAND Mobile Cellular Phone ELECTRONICS SGH-A288 SERVICE Manual DUAL BAND MOBILE CELLULAR PHONE CONTENTS 1. Exploded Views and Parts List 2. PCB Diagrams 3. Electrical Parts List 4. Block Diagrams 5. Flow chart of trouble shooting...
  • Page 2 ELECTRONICS Samsung Electronics Co.,Ltd. Printed in Korea 03/2001 Rev 1.0 GH68-01895A...

  • Page 3: Table Of Contents

    1. Exploded Views and Parts List Main Main Parts List Travel Adapter Travel Adapter Parts List Ciger Light Adapter Ciger Light Adapter Parts List Test Jig Wearable EAR Microphone Data Kit 1-10 Battery Charger 2. PCB Diagrams Main Top Main Bottom 3.
  • Page 4 1. Exploded Views and Parts List 1-1 Main 2-11 2-10 Exploded Views and Parts List...

  • Page 5: Main Parts List

    1-2 Main Parts List SEC CODE DESCRIPTION COLOR Q`TY REMARKS GH75-00925A MEC-FOLDER UPPER WHITE GH72-02098A PMO-FOLDER UPPER GH74-00307A MPR-TAPE WATCH WINDOW GH74-01114A MPR-SPONGE WATCH LCD GH75-00926A MEC-FOLDER LOWER WHITE GH70-00039A ICT-MAGNETIC GH72-02099A PMO-FOLDER LOWER GH74-00309A MPR-SPONGE MAIN LCD GH74-00310A MPR-TAPE MAIN LCD GH74-00311A MPR-TAPE VIBRATOR GH74-00312A...
  • Page 6 SEC CODE DESCRIPTION COLOR Q`TY REMARKS GH74-01294A MPR-CLOTH BUZZER GH74-01295A MPR-SPONGE VIB SPEAKER GH74-01297A MPR-SHIELD FOAM CONN GH74-01332A MPR-GASKET LOWER GH74-40518A MCT-BACKUP TAPE 6001-000464 SCREW-MACHINE GH71-00095A NPR-CONTACT ANT GH72-00602A PCT-WINDOW LCD GH72-00647B PMO-SPEAKER COVER GH73-00578A RMO-CONNECTOR COVER GH73-00579A RMO-MOBILE CAP GH73-00667A RMO-ANT.CONTACT RUBBER GH74-40518A...

  • Page 7: Travel Adapter

    1-3 Travel Adapter 1-4 Travel Adapter Parts List TYPE SEC CODE REMARK GH44-00171A CHINA GH44-00184A EUROPE GH44-00171C UNITED KINGDOM Gh44-00171E TAIWAN Exploded Views and Parts List...

  • Page 8: Ciger Light Adapter

    1-5 Ciger Light Adapter 1-6 Ciger Light Adapter Parts List DESCRIPTION SEC CODE REMARK Ciger Light Adapter Code GH44-00170A BLACK Exploded Views and Parts List...

  • Page 9: Test Jig

    1-7 Test Jig TEST JIG GH80-10508A TEST JIG CABLE GH39-00079A RF JIG CABLE GH39-00089A Exploded Views and Parts List...
  • Page 10 DM CABLE GH39-00080A 1-7-1 Test Jig POWER SUPPLY 8922 or 8960 WIRELESS COMMVNCATIONS TEST SET RF JIG CABLE 232 CABLE TEST JIG CABLE Exploded Views and Parts List...

  • Page 11: Wearable Ear Microphone

    1-8 Wearable EAR Microphone Wearable EAR Microphone GH59-00168A 1-9 Data Kit DATA KIT GH39-00078A Exploded Views and Parts List...

  • Page 12: Battery Charger

    1-10 Battery Charger BATTERY CHAGER GH44-00177A Exploded Views and Parts List...
  • Page 13 2. PCB Diagrams 2-1 Main Top PCB Diagrams...
  • Page 14 2-1-1 Main RF Top PCB Diagrams...
  • Page 15 2-1-2 Main Base Band Top PCB Diagrams...

  • Page 16: Main Bottom

    2-2 Main Bottom PCB Diagrams...
  • Page 17 2-2-1 Main RF Bottom PCB Diagrams...
  • Page 18 2-2-2 Main Base Band Bottom PCB Diagrams...

  • Page 19: Main Parts List Top

    3. Electrical Parts List 3-1 Main Parts List Top SEC CODE Reference Part Description Vendor Part No. D301 0404-001054 TR-SMALL SIGNAL;HSMS-2805-L31 HSMS-2805-L31 D102,D104 0407-001002 TR-SMALL SIGNAL;DAN222TL DAN222TL D107 0407-001007 TR-SMALL SIGNAL;UMN1 UMN1 Q108 0501-000162 TR-SMALL SIGNAL;2SA1576FRT106 2SA1576FRT106 Q103 0501-000218 TR-SMALL SIGNAL;2SC4081BRT106 2SC4081BRT106 Q102,Q107 0501-002011...
  • Page 20 SEC CODE Reference Part Description Vendor Part No. R103,R105,R106,R114 2007-000148 R-CHIP;10K,5% RK73K1ETP103J R121,R125,R154,R155 2007-000148 R-CHIP;10K,5% RK73K1ETP103J R156,R159,R161,R162 2007-000148 R-CHIP;10K,5% RK73K1ETP103J R163,R165,R178,R182 2007-000148 R-CHIP;10K,5% RK73K1ETP103J R332,R344,R347,R673 2007-000148 R-CHIP;10K,5% RK73K1ETP103J R678,R694 2007-000148 R-CHIP;10K,5% RK73K1ETP103J R136 2007-000152 R-CHIP;20K,5% RK73K1ETP203J R144,R170 2007-000157 R-CHIP;47K,5% RK73K1ETP473J R187 2007-000159 R-CHIP;56K,5%...
  • Page 21 SEC CODE Reference Part Description Vendor Part No. R101 2011-001345 R-CHIP;EXB28V103JX EXB28V103JX C129,C135,C138 2203-000233 C-CERAMIC,CHIP;C101J,100PF,50V GRM36C0G101J50PT C333,C351,C695 2203-000233 C-CERAMIC,CHIP;C101J,100PF,50V GRM36C0G101J50PT C706,C725 2203-000233 C-CERAMIC,CHIP;C101J,100PF,50V GRM36C0G101J50PT C107,C119,C147 2203-000254 C-CERAMIC,CHIP;C103K,10NF,16V GRM36X7R103K16PT C151,C164,C171,C181 2203-000254 C-CERAMIC,CHIP;C103K,10NF,16V GRM36X7R103K16PT C183,C197,C306 2203-000254 C-CERAMIC,CHIP;C103K,10NF,16V GRM36X7R103K16PT C319,C320,C321,C366 2203-000254 C-CERAMIC,CHIP;C103K,10NF,16V GRM36X7R103K16PT C374,C382,C549 2203-000254 C-CERAMIC,CHIP;C103K,10NF,16V...
  • Page 22 SEC CODE Reference Part Description Vendor Part No. C205,C303,C304 2203-005061 C-CERAMIC,CHIP;C104Z,100NF,16V GRM36Y5V104Z16PT C308,C316 2203-005061 C-CERAMIC,CHIP;C104Z,100NF,16V GRM36Y5V104Z16PT C705 2203-005061 C-CERAMIC,CHIP;C104Z,100NF,16V GRM36Y5V104Z16PT C104,C125 2203-005065 C-CERAMIC,CHIP;C105Z,1UF,10V GRM39Y5V105Z10PT C702,C743 2203-005065 C-CERAMIC,CHIP;C105Z,1UF,10V GRM39Y5V105Z10PT C352 2203-005138 C-CERAMIC,CHIP;C182K,1.8NF,50V GRM36X7R182K50PT C309,C310 2203-005382 C-CERAMIC,CHIP;C060B,6PF,50V GRM36C0G060B50PT C364 2203-005446 C-CERAMIC,CHIP;C2R7B,2.7PF,50V GRM36C0G2R7B50PT C335 2203-005450 C-CERAMIC,CHIP;C5R6B,5.6PF,50V...

  • Page 23: Main Parts List Bottom

    3-2 Main Parts List Bottom SEC CODE Reference Part Description Vendor Part No. J301 3705-001239 COMP-SMD;MHC-175 MHC-175 L302 2703-001772 INDUCTOR-SMD;18NH,5%,1.0X0.5X0.5MM MLK1005S18NJT F307 2901-001116 COMP-SMD;NFM39R12C471T1 FM39R12C471T1 R330 2007-001305 R-CHIP;120,5% ERJ2GEJ121X C747 2203-005057 C-CERAMIC,CHIP;C8R2C,8.2PF,50V GRM36C0G8R2D50PT C402 2203-000812 C-CERAMIC,CHIP;C330J,33PF,50V GRM36C0G330J50PT C756 2404-001105 C-TA,CHIP;10UF/6.3V TAJR106M006R C396 2404-001210...
  • Page 24 SEC CODE Reference Part Description Vendor Part No. R119 2007-007771 R-CHIP;0,5% ERJ2GEJ0R0E C753 2203-000679 C-CERAMIC,CHIP;C270J,27PF,50V GRM36C0G270J50PT CN105 3710-001428 COMP-SMD;AXK5F24335J AXK5F24335J U200 2806-001239 COMP-SMD;V0F1748C28KRD V0F1748C28KRD C391 2203-005065 C-CERAMIC,CHIP;C105Z,1UF,10V GRM36C0G470J101PT C392 2203-000679 C-CERAMIC,CHIP;C270J,27PF,50V GRM36C0G270J50PT R343 2007-007771 R-CHIP;0,5% ERJ2GEJ0R0E R331 2007-000138 R-CHIP;100,5% RK73K1ETP101J C365 2301-001232 C-CERAMIC,CHIP;470PF,50V...
  • Page 25 SEC CODE Reference Part Description Vendor Part No. L102 2703-002025 INDUCTOR-SMD;BTC-0309-470 BTC-0309-470 F307 2203-005065 C-CERAMIC,CHIP;C105Z,1UF,10V GRM36C0G470J101PT C328 2404-001105 C-TA,CHIP;10UF/6.3V GRM36C0G470J127PT U463 1203-002227 IC;R5320G002-TR R5320G002-TR D108 0402-001331 TR-SMALL SIGNAL;CRS04-TE85L CRS04-TE85L C746 2203-003054 C-CERAMIC,CHIP;C090C,9PF,50V GRM36C0G470J73PT C704 2203-005061 C-CERAMIC,CHIP;C104Z,100NF,16V GRM36C0G470J84PT R671 2007-007107 R-CHIP;100K,1% ERJ2RKF1003X C555 2203-000679...
  • Page 26 SEC CODE Reference Part Description Vendor Part No. R209 2011-001344 R-CHIP;CRB2A4E101JT CRB2A4E101JT F201 2901-001116 COMP-SMD;NFM39R12C471T1 NFM39R12C471T1 F200 2901-001116 COMP-SMD;NFM39R12C471T1 NFM39R12C471T1 ZD201 0406-001104 TR-SMALL SIGNAL;ESDA6V1-5W6 ESDA6V1-5W6 R207 2011-001344 R-CHIP;CRB2A4E101JT CRB2A4E101JT C210 2203-005061 C-CERAMIC,CHIP;C104Z,100NF,16V GRM36C0G470J84PT C714 2203-000679 C-CERAMIC,CHIP;C270J,27PF,50V GRM36C0G270J50PT C201 2203-000679 C-CERAMIC,CHIP;C270J,27PF,50V GRM36C0G270J50PT L200 2703-001752...
  • Page 27 4. Block Diagrams 4-1 Main Base Band Block Diagrams...

  • Page 28: Main Rf

    4-2 Main RF Block Diagrams...
  • Page 29 4-2-1 RF Transmit Part Block Diagrams...
  • Page 30 4-2-2 RF Receive Part Block Diagrams...
  • Page 31 5. Flow chart of trouble shooting and Circuit Diagram 5-1 Power ON 'POWER ON'does not work Check the Battery Voltage Charge the Battery is more than 3.2V The node Check U116 and the path from +VBATT between D110 and BAT101 = 3V ? to BAT101 U117 pin 1,4,10 >...
  • Page 32 Flow chart of trouble shooting and Circuit Diagram...
  • Page 33 5-2 Initial Initial Failure Check and repair the important U103 pin 4 = "H" ? signals of U108 as follows The node between R162 and C183 Check U112 = "H" (RST) R114 = "H" (BOOT) Resolder R114 Check all the other connection by Test S/W R673 = "H"...
  • Page 34 Flow chart of trouble shooting and Circuit Diagram...

  • Page 35: Charging Part

    5-3 Charging Part Abnormal charging part Check the CN502 pin 17,18 5.2V ? Replace TA Check the U639 pin 3 5.2 V ? Resolder C111, L632, C710 U639 pin 4 = "L" ? Resolder R328 Resolder components around Check the U639 pin 5 4.2V ? U639 Flow chart of trouble shooting and Circuit Diagram...
  • Page 36 Flow chart of trouble shooting and Circuit Diagram...

  • Page 37: Sim Part

    5-4 Sim Part Phone can't access SIM card R699 = 2.9 V ? Check the circuit related to U463 Check the circuit related to U463 pin1 = 3 V ? R421, R428, U649 U101 pin6 = 3 V ? Resolder R103 U101 pin 5 = "H"...
  • Page 38 Flow chart of trouble shooting and Circuit Diagram...

  • Page 39: Microphone Part

    5-5 Microphone Part Microphone does not work Check Resolder CN503, pin 10, 11 and the connection ZD109, ZD112 from CN503, pin 10, 11 Check the circuit related to Q102 U113, U115 pin 2 (AVCC) 2.9V? Check the circuit Resolder the R174, R175, R176 from U108 to U113, U115 R177, C187, C188 and C204 Replace the Key PCB...
  • Page 40 Flow chart of trouble shooting and Circuit Diagram 5-10...

  • Page 41: Speaker Part

    5-6 Speaker Part Speaker does not work Resoler J101 J101 pin 2, 3 = short J101 pin 2, 3, 6 = 1.5V? Replace the PBA CN 105 pin 22, 23 = 1.5V? Resolder CN105 Check the depression of Modify the SPK pins the SPK pins Is Speaker working? Replace the Speaker...

  • Page 42: Key Data Input

    5-7 Key Data Input Check Initial operation the pin 19,20,21,22 and 23 Replace the PBA of CN503 low? When one of the keys is pushed, Resolder pin 19,20,21,22 and 23 one of pin 19,20,21,22 and 23 of of CN503 CN503 is high ? Key PCB is OK ? Replace the Key PCB Flow chart of trouble shooting and Circuit Diagram...

  • Page 43: Alert Tone

    5-8 Alert Tone Abnormal Alert tone Is there alert wave form on the ALERT by Test S/W R110 during alert tone test? Is there alert wave form on the Check the circuit related to Q102 Q102 pin 3 during alert tone test? U116 pin 5 3.3V? Check the circuit related to U116...
  • Page 44 RTC 3V3(From U116 pin5) BUZ+ C102 D104 Q102 BUZ- R110 From IC R109...

  • Page 45: Ring Indicator

    5-9 Ring Indicator Ring Indicator LED does not work Q101 pin 2 = "H"? GPO2 by Test S/W Q101 pin 3 = "L"? Replace Q101 Resolder CN503, LED CN503 pin 3 = "L"? Key PCB is OK? Replace the Key PCB 5-15 Flow chart of trouble shooting and Circuit Diagram...
  • Page 46 Flow chart of trouble shooting and Circuit Diagram 5-16...

  • Page 47: Back Light

    5-10 Back Light Backlight does not work Backlight "ON" mode Select backlight "ON" mode in the menu? U108 pin J3 = "H" ? GPO1 by test S/W LCD BACKLIGHT KEY PCB LED Check the Check the CN105 pin 17 = "H" ? CN105 pin 17 LCD backlight on ? Replace EL sheet...

  • Page 48: Gsm Receiver

    5-11 GSM Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U304 Pin 2 Check RF connector -65 dBm -> resolder Check U304 Resolder & VC1 : L Pin 9 U304 Pin 9 VC2 : L -65 dBm -65 dBm...

  • Page 49: Gsm Transmit

    5-12 GSM Transmit Tx On (level : 5) U304 Resolder Pin 2 J301 30 dBm Check U304 VC1 : L Change or Resolder Pin 7 VC2 : H U304 30 dBm VC3 : L Check Ant. S/W, Control Circuit U312 Resolder Pin 1 U318, C353...

  • Page 50: Dcs Receiver

    5-13 DCS Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U304 Pin 2 Check RF connector -65 dBm -> resolder Check U304 Resolder & VC1 : L Pin 16 U304 Pin 16 VC2 : L -65 dBm -65 dBm...

  • Page 51: Dcs Transmit

    5-14 DCS Transmit Tx On (level : 0) U304 Resolder Pin 2 J301 25 dBm Check U304 VC1 : L Change or Resolder Pin 13 VC2 : H U304 25 dBm VC3 : L Check Ant. S/W, Control Circuit U318 Resolder Pin 3 U318, C364...
  • Page 52 GNDR GNDR SDAT RFOUT SCLK VDDR SENB AUXOUT VDDI PWDNB IFOUT GNDI Flow chart of trouble shooting and Circuit Diagram 5-22...
  • Page 53 MIX2OUTB GNDIFLO MIX2OUT IOUT VCCIF IOUTB GNDIF QOUT RFLOIN QOUTB VCCRELO GNDIQ MIX1OUT VCCIQ MIX1OUTB RESET VCCMIX GNDMIX IINB MIX1GSMIN C324 MIX1GSMINB QINB ICURAD C325 PLLOUT C326 5-23 Flow chart of trouble shooting and Circuit Diagram...
  • Page 54 GND4 GND3 GND2 GND1 TERM COU_OUT Flow chart of trouble shooting and Circuit Diagram 5-24...
  • Page 55 5-25 Flow chart of trouble shooting and Circuit Diagram...

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