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Samsung SGH-A800 Service Manual

Dual band mobile cellular phone
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SERVICE
DUAL BAND MOBILE CELLULAR PHONE
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www.Manualslib.com
ELECTRONICS
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DUAL BAND Mobile
Cellular Phone
SGH-A800
Manual
CONTENTS
1. Exploded Views and Parts List
2. PCB Diagrams
3. Electrical Parts List
4. Block Diagrams
5. Flow Chart of Troubleshooting and
Circuit Diagram

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Summary of Contents for Samsung SGH-A800

  • Page 1 DUAL BAND Mobile ELECTRONICS Cellular Phone SGH-A800 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 Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com...
  • Page 2 ELECTRONICS Samsung Electronics Co.,Ltd. Printed in Korea 11/2002 Rev 1.0 GH68-03108A Downloaded from www.Manualslib.com manuals search engine...

  • Page 3: Exploded Views And Parts List

    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 Exploded Views and Parts List Downloaded from www.Manualslib.com manuals search engine...
  • Page 5 1-2 Main Parts List Location Description SEC CODE Remark DUAL WINDOW LCD GH72-04824A GH75-02119A FOLDER DUMMY FOLDER UPPER GH75-02117A GH07-00181A MOTOR 3101-001328 3001-001319 SPEAKER FOLDER LOWER GH75-02118A GH72-04823A WINDOW LCD SCREW 6001-001285 GH74-02895A SCREW SHEET FRONT COVER GH75-02116A GH75-02136A KEYPAD VOLKEY F-PCB GH59-00474A GH92-01334A...
  • Page 6 SGH-A800 COLOR & CODE COLOR SILVER Dark Silver Dark Blue Royal Blue ITEM FOLDER UPPER GH75-02117A GH75-02117B GH75-02117C GH75-02117D FOLDER LOWER GH75-02118A GH75-02118B GH75-02118C GH75-02118D FRONT COVER GH75-02116A GH75-02116B GH75-02116C GH75-02116D REAR COVER GH75-02121A GH75-02121B GH75-02121C GH75-02121D FOLDER DUMMY GH75-02119A...

  • 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 Downloaded from www.Manualslib.com manuals search engine...

  • 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 Downloaded from www.Manualslib.com manuals search engine...

  • Page 9: Test Jig

    1-7 Test Jig TEST JIG GH80-10508A TEST JIG CABLE GH39-00079A RF JIG CABLE GH39-00174A Exploded Views and Parts List Downloaded from www.Manualslib.com manuals search engine...
  • Page 10 1-7 Test Jig POWER SUPPLY 8922 or 8960 WIRELESS COMMUNICATIONS TEST SET RF JIG CABLE 232 CABLE TEST JIG CABLE Exploded Views and Parts List Downloaded from www.Manualslib.com manuals search engine...

  • Page 11: Wearable Ear Microphone

    1-8 Wearable EAR Microphone Wearable EAR Microphone GH59-00322A 1-9 Data Kit DATA KIT GH39-00078A Exploded Views and Parts List Downloaded from www.Manualslib.com manuals search engine...

  • Page 12: Battery Charger

    1-10 Battery Charger BATTERY CHARGER GH44-00279A 1-10 Exploded Views and Parts List Downloaded from www.Manualslib.com manuals search engine...

  • Page 13: Pcb Diagrams

    2. PCB Diagrams 2-1 Main Top SOFT2 R712 R713 DIGIT3 DIGIT6 DIGIT9 SYMBOL# RIGHT R203 C202 R413 R204 C201 DIGIT2 DIGIT5 DIGIT8 DIGIT10 C102 R201 U100 C200 C417 C414 L402 C423 C420 C441 L400 R200 C437 C112 R417 C309 LEFT U202 C307 U103...
  • Page 14 2-2 Main Bottom PCB Diagrams Downloaded from www.Manualslib.com manuals search engine...

  • Page 15: Electrical Parts List

    SLS-NNBL102TS 26 U200 0801-002540 IC-CMOS LOGIC “7SZ19,DECODER,SOP,6P,49MIL,SINGLE,TP, NC7SZ19P6X PLASTIC,-,-,0.55V,-40to+85C,-,4.125V,1uA,-,” 27 Q201 1003-001440 IC-POWER DRIVER “MDC3105LT1,SOT-23,3P,49MIL,-,500MA,TP,” MDC3105LT1 PLASTIC,6V,-40TO+85C,225MA,-,- 28 U203 1009-001010 IC-HALL EFFECT S/W “A3212ELH-SAMSUNG,SC-59A,3P,82MIL,TP, A3212ELHLT-SAMSUNG BICMOS,PLASTIC,3.5V,2MA,-40TO+85C,-,-,-,340K” 29 U103 1203-002076 IC-VOLTAGE “2985,SOT-23,5P,63MIL,PLASTIC,2.9/3.1V,-, LP2985AIM5X-3.0 REGULATOR -40to+125C,350mA,-,TP” 30 U100 1203-002077 IC-VOLTAGE “2985,SOT-23,5P,63MIL,PLASTIC,3.284/3.416V,-, LP2985AIM5X-3.3 REGULATOR -40to+125C,350mA,-,TP”...
  • Page 16 NO Refer Part Description Vendor Part No. ence CODE TH200 1404-001221 THERMISTOR-NTC “47Kohm,-,4050K,1mW/C,-,-,TP” NCP15WB473J04RC V400 1405-001082 VARISTOR “5.6V,20A,1x0.5x0.6mm,TP” VC040205X150R V401 1405-001082 VARISTOR “5.6V,20A,1x0.5x0.6mm,TP” VC040205X150R V315 1405-001093 VARISTOR “14V,20A,1x0.5x0.6mm,TP” VC040214X300 V201 1405-001110 VARISTOR “18V,20A,1X0.5X0.6MM,TP” AVLC 14S 02 050 V202 1405-001110 VARISTOR “18V,20A,1X0.5X0.6MM,TP”...
  • Page 17 NO Refer Part Description Vendor Part No. ence CODE C422 2203-000254 “C-CERAMIC,CHIP” “10nF,10%,16V,X7R,TP,1005,-” CM05X7R103K16AT C308 2203-000438 “C-CERAMIC,CHIP” “1nF,10%,50V,X7R,TP,1005,-” CM05X7R102K50AH C304 2203-000679 “C-CERAMIC,CHIP” “0.027nF,5%,50V,NP0,TP,1005” CM05CG270J50AT C400 2203-000812 “C-CERAMIC,CHIP” “0.033nF,5%,50V,NP0,TP,1005” CM05CG330J50AT C401 2203-000812 “C-CERAMIC,CHIP” “0.033nF,5%,50V,NP0,TP,1005” CM05CG330J50AT C415 2203-000812 “C-CERAMIC,CHIP” “0.033nF,5%,50V,NP0,TP,1005” CM05CG330J50AT C416 2203-000812 “C-CERAMIC,CHIP”...

  • Page 18: Main Parts List Bottom

    3-2 Main Parts List Bottom NO Refer Part Description Vendor Part No. ence CODE Q700 0504-001058 TR-DIGITAL “RN4985,NPN/PNP,200mW,2.2Kohm/47Kohm,UMD6,TP” RN4985-TE85L Q701 0504-001058 TR-DIGITAL “RN4985,NPN/PNP,200mW,2.2Kohm/47Kohm,UMD6,TP” RN4985-TE85L U201 0504-001060 TR-DIGITAL “BCR08PN,NPN/PNP,250mW,2.2Kohm/47Kohm,SOT-363,TP” BCR08PN Q400 0505-001332 FET-SILICON “FDG6301,N,25V,0.22A,4OHM,.3W,SC70-6” FDG6301N U101 0505-001423 FET-SILICON “FDG6323L,N/P,-,-,-,0.3W,SC70-6” FDG6323L U105 0506-001004 TR-ARRAY “UMC5N,NPN/PNP,2,50V,-,-100mA,3”...
  • Page 19 NO Refer Part Description Vendor Part No. ence CODE V306 1405-001093 VARISTOR “14V,20A,1x0.5x0.6mm,TP” VC040214X300 V305 1405-001093 VARISTOR “14V,20A,1x0.5x0.6mm,TP” VC040214X300 V304 1405-001093 VARISTOR “14V,20A,1x0.5x0.6mm,TP” VC040214X300 V303 1405-001093 VARISTOR “14V,20A,1x0.5x0.6mm,TP” VC040214X300 V302 1405-001093 VARISTOR “14V,20A,1x0.5x0.6mm,TP” VC040214X300 V203 1405-001110 VARISTOR “18V,20A,1X0.5X0.6MM,TP” AVLC 14S 02 050 R500 2007-000138 R-CHIP...
  • Page 20 Refer Part Description Vendor Part No. ence CODE R706 2007-001217 R-CHIP “82ohm,5%,1/16W,DA,TP,1005” ERJ2GEJ820X R707 2007-001217 R-CHIP “82ohm,5%,1/16W,DA,TP,1005” ERJ2GEJ820X R600 2007-001295 R-CHIP “39ohm,5%,1/16W,DA,TP,1005” ERJ2GEJ390X R604 2007-001295 R-CHIP “39ohm,5%,1/16W,DA,TP,1005” ERJ2GEJ390X R502 2007-001298 R-CHIP “51ohm,5%,1/16W,DA,TP,1005” ERJ2GEJ510X R503 2007-001298 R-CHIP “51ohm,5%,1/16W,DA,TP,1005” ERJ2GEJ510X R504 2007-001298 R-CHIP “51ohm,5%,1/16W,DA,TP,1005”...
  • Page 21 NO Refer Part Description Vendor Part No. ence CODE R608 2007-007771 R-CHIP “0OHM,5%,1/16W,DA,TP,1005” ERJ2GEJ0R0E R103 2007-008117 R-CHIP “2.7Kohm,1%,1/16W,DA,TP,1005” RK73H1ETP2701F R402 2007-008117 R-CHIP “2.7Kohm,1%,1/16W,DA,TP,1005” RK73H1ETP2701F R403 2007-008117 R-CHIP “2.7Kohm,1%,1/16W,DA,TP,1005” RK73H1ETP2701F R702 2007-008117 R-CHIP “2.7Kohm,1%,1/16W,DA,TP,1005” RK73H1ETP2701F R439 2011-001345 R-NETWORK “10Kohm,5%,1/16W,L,CHIP,8P,TP” EXB28V103JX C405 2203-000233 “C-CERAMIC,CHIP”...
  • Page 22 Refer Part Description Vendor Part No. ence CODE C237 2203-000679 “C-CERAMIC,CHIP” “0.027nF,5%,50V,NP0,TP,1005” CM05CG270J50AT C240 2203-000679 “C-CERAMIC,CHIP” “0.027nF,5%,50V,NP0,TP,1005” CM05CG270J50AT C300 2203-000679 “C-CERAMIC,CHIP” “0.027nF,5%,50V,NP0,TP,1005” CM05CG270J50AT C316 2203-000679 “C-CERAMIC,CHIP” “0.027nF,5%,50V,NP0,TP,1005” CM05CG270J50AT C427 2203-000679 “C-CERAMIC,CHIP” “0.027nF,5%,50V,NP0,TP,1005” CM05CG270J50AT C435 2203-005382 “C-CERAMIC,CHIP” “0.006nF,0.1pF,50V,NP0,TP,1005” GRP1555C1H6R0BZ01E C436 2203-005382 “C-CERAMIC,CHIP”...
  • Page 23 NO Refer Part Description Vendor Part No. ence CODE C105 2203-005065 “C-CERAMIC,CHIP” “1000nF,+80-20%,10V,Y5V,TP,1608” CL10F105ZPNC C107 2203-005065 “C-CERAMIC,CHIP” “1000nF,+80-20%,10V,Y5V,TP,1608” CL10F105ZPNC C130 2203-005065 “C-CERAMIC,CHIP” “1000nF,+80-20%,10V,Y5V,TP,1608” CL10F105ZPNC C501 2203-005065 “C-CERAMIC,CHIP” “1000nF,+80-20%,10V,Y5V,TP,1608” CL10F105ZPNC C505 2203-005065 “C-CERAMIC,CHIP” “1000nF,+80-20%,10V,Y5V,TP,1608” CL10F105ZPNC C602 2203-005234 “C-CERAMIC,CHIP” “0.0012nF,0.25pF,50V,NP0,TP,1005” GRP1555C1H1R2CZ01E C603 2203-005234 “C-CERAMIC,CHIP”...
  • Page 24 NO Refer Part Description Vendor Part No. ence CODE 2.0X1.25X0.7mm,TP” U700 4709-001214 COUPLER-DIRECTION “880-915MHz,19.5+-1dB, DCS214E-0897 13dB,2.0X1.25X0.7mm,TP” ANT700 GH61-00026A SPRING ETC-ANT. “SGH-N620,BE-CU,-,-,-,-,-,-,GLD,-,-” CONTACT GH73-01322A RMO-RUBBER ANT “SPH-X7700,CR RUBBER, CONTACT 3X4XT1.0,-,-,BLK,-,-,-,-” Electrical Parts List 3-10 Downloaded from www.Manualslib.com manuals search engine...

  • Page 25: Block Diagrams

    4. Block Diagrams 4-1 Main Base Band Block Diagrams Downloaded from www.Manualslib.com manuals search engine...
  • Page 26 4-2 Main RF Block Diagrams Downloaded from www.Manualslib.com manuals search engine...

  • Page 27: Rf Transmit Part

    4-2-1 RF Transmit Part Block Diagrams Downloaded from www.Manualslib.com manuals search engine...
  • Page 28 4-2-2 RF Receive Part Block Diagrams Downloaded from www.Manualslib.com manuals search engine...

  • Page 29: Flow Chart Of Troubleshooting And

    5. Flow Chart of Troubleshooting and Circuit Diagram 5-1 Power ON 'POWER ON'does not work Check the Battery Voltage Charge the Battery is more than 3.4V? The node Check U100 and the path from +VBATT between D101 and C106 > 2.8 V ? to C106 When the "END"...
  • Page 30 Flow chart of Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com manuals search engine...
  • Page 31 5-2 Initial Initial Failure Check and repair the important U302 pin 6 = "H" ? signals of U400 as follows The node between R407 and C411 Check U106 = "H" (RST) R411 = "H" Resolder R411 (SIMPWDN_BOOT) Check all the other connection by Test S/W R423 = "H"...
  • Page 32 Flow chart of Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com manuals search engine...

  • Page 33: Charging Part

    5-3 Charging Part Abnormal charging part Check the CN300-1 pin 17,18 > 5 V ? Replace TA Check the U104 pin 3 > 5 V ? Resolder C115 U104 pin 4 = "L" ? Resolder R103 Resolder components Check the U104 pin 5 4.2V ? around U104 Flow chart of Troubleshooting and Circuit Diagram...
  • Page 34 Flow chart of Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com manuals search engine...

  • Page 35: Sim Part

    5-4 Sim Part Phone can't access SIM card U101 pin 6 = 3 V ? Resolder R101 U101 pin 5 = "H" ? Replace the PBA U101 pin 2, 3 = 3 V ? Replace U101 Resoldering CN100 CN100 pin 1, 5 = 3 V ? and check open connection from U101 to CN100 After Power ON,...
  • Page 36 Flow chart of Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com manuals search engine...

  • Page 37: Microphone Part

    5-5 Microphone Part Microphone does not work Check Resolder MIC and the connection C424, C428, V400, V401 from MIC Check the circuit Resolder the R419, R420, R423, related to U400 C424, C425, C426, C430 and C431 Check the MIC Replace the MIC Flow chart of Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com...
  • Page 38 Flow chart of Troubleshooting and Circuit Diagram 5-10 Downloaded from www.Manualslib.com manuals search engine...

  • Page 39: Speaker Part

    5-6 Speaker Part Speaker does not work Check the clock generation circuit (related to U502 and U601) Check for the clock signal at R608 and resolder R608 Resolder U301 U301 pin 17,18 =1.8V? Replace the PBA U230 pin 4,8="H"? Resolder U230 CN200 PIN 18,20=1.8V? Modify the SPK pins Check the SPK pins...
  • Page 40 Flow chart of Troubleshooting and Circuit Diagram 5-12 Downloaded from www.Manualslib.com manuals search engine...

  • Page 41: Key Data Input

    5-7 Key Data Input Check Initial operation Replace the PBA KEYBOARD_ROW(0:4) is "Low" ? When one of the keys is pushed, Replace the PBA one of KEYBOARD_ROW(0:4) is "High" ? 5-13 Flow chart of Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com manuals search engine...

  • Page 42: Receiver Part

    5-8 Receiver Part Receiver does not work Resolder EAR400 EAR400 pin 2, 3 = short ? Replace the PBA EAR400 pin 2, 3, 6 = 1.5V ? Replace the PBA U230 pin 4, 8 = "L" ? Resolder R219, R220 CN200 pin 18, 20 = 1.5V ? and U230 Modify the REC pins...
  • Page 43 5-15 Flow chart of Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com manuals search engine...

  • Page 44: Ring Indicator

    5-9 Ring Indicator Ring Indicator LED does not work U100 pin 5 = 3.3 V ? Check the circuit related to U100 Is Green color LED of 3LEDs Check Q4, R14, LED6 correctly work ? Is Red color LED of 3LEDs Check Q3, R12, LED6 correctly work ? Is Blue color LED of 3LEDs...
  • Page 45 5-17 Flow chart of Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com manuals search engine...
  • Page 46 5-10 Back Light (for Main & Sub LCD) Backlight does not work LCD Contrast high level Select LCD Contrast high level in the menu? Check the circuit related to CN 200 pin 10 = 3.3V ? U100 MAIN LCD SUB LCD Replace the PBA CN200 pin 25 = "H"...
  • Page 47 5-11 Back Light (for Key) Backlight does not work Backlight "ON" mode Select backlight "ON" mode in the menu? GPO1 by test S/W R215 = "H" ? Resolder R215,R216 Q200 pin 3 = "L" ? or resolder Q200 Resolder R207~214 Key PCB LED on ? and LAMP200~207 5-19...

  • Page 48: Gsm Receiver

    5-12 GSM Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U704 Check RF connector Pin 8 -> resolder -60 dBm U704 Resolder & Check U704 Pin 10 VC1 : L Pin 10 -60 dBm VC2 : L -60 dBm...

  • Page 49: Gsm Transmit

    5-13 GSM Transmit Tx On (level : 5) U704 Resolder Pin 8 CON700 30 dBm U704 Check Change or Resolder VC1 : L Pin 5 U704 VC2 : H 30 dBm Check Ant. S/W, Control Circuit U701 Resolder Pin 4 U700 30 dBm Check...

  • Page 50: Dcs Receiver

    5-14 DCS Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U704 Check RF connector Pin 8 -> resolder -60 dBm U704 Resolder & Check U706 Pin 1 VC1 : L Pin 1 -60 dBm VC2 : L -60 dBm...

  • Page 51: Dcs Transmit

    5-15 DCS Transmit Tx On (level : 0) U704 Resolder Pin 8 CON700 25 dBm U704 Check Change or Resolder VC1 : H Pin 3 U704 VC2 : L 25 dBm Check Ant. S/W, Control Circuit U701 Resolder Pin 5 U703 25 dBm Check...
  • Page 52 Flow chart of Troubleshooting and Circuit Diagram 5-24 Downloaded from www.Manualslib.com manuals search engine...
  • Page 53 5-25 Flow chart of Troubleshooting and Circuit Diagram Downloaded from www.Manualslib.com manuals search engine...
  • Page 54 Flow chart of Troubleshooting and Circuit Diagram 5-26 Downloaded from www.Manualslib.com manuals search engine...

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