SGH-M Specification. 2. Exploded View and Parts list. 3. Chart of Troubleshooting. 4. Array course control. 5. Block Diagrams. 6.

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Abner Higgins
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1 GSM TELEPHONE SGH-M300 GSM TELEPHONE CONTENTS 1. Specification 2. Exploded View and Parts list 3. Chart of Troubleshooting 4. Array course control 5. Block Diagrams 6. PCB Diagrams 7. MAIN Electrical Parts List 8. Reference data 9. Safety Precautions 10. Product Function

2 Contents 1. Specification 1-1. GSM/CDMA General Specification GSM TX power class Exploded View and Parts list 2-1. Cellular phone Exploded View Cellular phone Parts list Disassembly Assembly LCD KIT Assembly ChartofTroubleshooting 3-1. Baseband Power ON System Initial SIM Part Charging Part Microphone Part Speaker Part Receiver Part Camera Part ) 2Mega Camera ) VGA Camera LCD RF EGSM Receiver EGSM Transmitter DCS Receiver DCS Transmitter PCS Receiver PCS Transmitter UMTS Receiver UMTS Transmitter BLUETOOTH

3 Contents 4. Array course control 4-1. Downloading Binary Files Pre-requsite for Downloading S/W Downloader Program Block Diagrams 6. PCB Diagrams 7. MAIN Electrical Parts List 8. Reference data 8-1. Reference Abbreviate Safety Precautions 9-1. Repair Precaution ESD(Electrostaically Sensitive Devices) Precaution Product Function

4 1. Specification 1-1. GSM General Specification GSM 900 Phase 1 EGSM 900 Phase 2 DCS1800 Phase 1 Freq. Band[MHz] Uplink/Downlink 890~ ~ ~ ~ ~ ~1880 ARFCN range 1~124 0~124 & 975~ ~885 Tx/Rx spacing 45 MHz 45 MHz 95 MHz Mod. Bit rate/ Bit Period Kbps us Kbps us Kbps us Time Slot Period/Frame Period us ms us ms us ms Modulation 0.3 GMSK 0.3 GMSK 0.3 GMSK MS Power 33 dbm~13 dbm 33 dbm~5 dbm 30 dbm~0 dbm Power Class 5 pcl ~ 15 pcl 5 pcl ~ 19 pcl 0 pcl ~ 15 pcl Sensitivity -102 dbm -102 dbm -100 dbm TDMA Mux Cell Radius 35 Km 35 Km 2 Km 1-1

5 Specification 1-2. GSM TX power class TX Power control level GSM900 TX Power control level DCS ±2 dbm 6 31±2 dbm 7 29±2 dbm 8 27±2 dbm 9 25±2 dbm 10 23±2 dbm 11 21±2 dbm 12 19±2 dbm 13 17±2 dbm 14 15±2 dbm 15 13±2 dbm 16 11±3 dbm 17 9±3 dbm 18 7±3 dbm 19 5±3 dbm 0 30±3 dbm 1 28±3 dbm 2 26±3 dbm 3 24±3 dbm 4 22±3 dbm 5 20±3 dbm 6 18±3 dbm 7 16±3 dbm 8 14±3 dbm 9 12±4 dbm 10 10±4 dbm 11 8±4 dbm 12 6±4 dbm 13 4±4 dbm 14 2±5 dbm 15 0±5 dbm 1-2

6 2. Exploded View and Parts List 2-1. Cellular phone Exploded View QFR01 QKP01 QFU01 QLC01 QCR12 QMP01 QSP01 QMO01 QMW01 QME01 QCA01 QAN10 QHI01 QMI01 QSH01 QAN02 QRF01 QFL01 QRE01 QCR12 QSC01 QVO01 QCR12 QRF03 QBA01 2-1

7 Exploded View and Parts List 2-2. Cellular phone Parts list Design LOC Discription SEC CODE QAN02 INTENNA-SGH-M300 GH A QAN10 ASSY-CUSHION-ANT CONTACT RUBBE GH A QBA01 BATTERY-700MAH.MAIN,ENG,OCEAN GH A QCA01 UNIT-CAMERA MODULE GH A QCR12 SCREW-MACHINE QCR12 SCREW-MACHINE QCR12 SCREW-MACHINE QFR01 ASSY CASE-FRONT GH B QFU01 ASSY CASE-FOLDER UPPER GH B QKP01 ASSY KEYPAD-(XET/EB) GH B QME01 UNIT-DOME SHEET 22 KEY GH A QMI01 MICROPHONE-ASSY-SGH_B600 GH A QMO01 MOTOR DC-SGHS342I GH A QMP01 PBA MAIN-SGH_M300 GH A QRF01 PMO-COVER RF GH A QSC01 MPR-SHEET SCREW CAP GH A QSH01 ASSY CASE-SHIELD CAN GH A QSP01 SPEAKER QVO01 ASSY KEY-VOLUME GH A QLC01 ELA UNIT-SGH-M300 LCD MODULE GH A QMW01 ASSY COVER-MAIN WINDOW GH A QRE01 ASSY CASE-REAR GH A QRF03 PMO-COVER EAR IF GH A QFL01 ASSY CASE-FOLDER LOWER GH A QHI01 ASSY HINGE GH A 2-2

8 Exploded View and Parts List Discription SEC CODE BAG PE ADAPTOR-SGHE690,SIL,EU,A_TYPE GH B UNIT-20P,EARPHONE,SIL,B-TYPE GH B LABEL(R)-WATER SOAK GH A MANUAL USERS-EU GERMAN GH A LABEL(R)-MAIN EU GH A BOX(P)-UNIT MAIN EU GH A MPR-SUB LCD CONN GAS GH A MPR-REMOVE TAPE LCD GH A MPR-LCD PCB MASK TAPE B GH A MPR-TAPE LED GH A MPR-INSU TAPE GH A MPR-GASKET TAPE GH A MPR-INSU TAPE SUB LCD GH A MPR-INSU TAPE GH A MPR-INSU TAPE GH A MPR-TAPE MAIN FPCB GH A MPR-INSU TAPE GH A MPR-TAPE MAIN FPCB GH A MPR-VINYL BOHO MAIN WINDOW GH A MPR-VINYL BOHO MAIN WINDOW GH A VINYL-BOHO MAIN GH A TAPE GASK-LCD SIDE A GH A TAPE-BACKLIGHT GH A TAPE-MAIN WINDOW GH A TAPE GH A TAPE-PCB GASKET GH A SPONGE GH A TAPE INSU GH A 2-3

rear case 2) Open the IF COVER caution 1) Be care of

3 1) Disjoint from left low side to up side of rear case

caution 1) When you disjoint a rear case, be care of 4

9 Exploded View and Parts List 2-3. Disassembly 1 2 (1) (2) (3) 1) Unscrew 4points from the rear case 2) Open the IF COVER caution 1) Be care of Shooting out damage and scratch not to occur. 3 1) Disjoint from left low side to up side of rear case as below picture. caution 1) When you disjoint a rear case, be care of Shooting out damage and scratch not to occur. 4 1) Remove the Volume key. 2) Disjoint B'd from front case. caution 1) During disconnecting the B'd from FRONT, pay attention not to tear the LCD FPCB. 1) Remove the shield can screw 2) Disjoint shield can from B'd caution 1) Pay attention not to damage for LCD FPCB during disconnecting the Shield can screw. 2-4

Exploded View and Parts List 5 6 Press the hinge 1) Disconnect the LCD

1) Be care of Shooting out damage and scratch not to occur.

7 1) Pressing the hinge using the rounded tweezers or sort of thing,

caution 8 (2) (1) (3) 1) Remove screw cover using tweezers.

disjoint the hooker of the lower side, disassemble the LOWER case as below

10 Exploded View and Parts List 5 6 Press the hinge 1) Disconnect the LCD connecter and Disjoint the B'd 2) Remove the dust protection tape caution 1) Be care of Shooting out damage and scratch not to occur. 2) Pay attention not to damage for LCD FPCB. 7 1) Pressing the hinge using the rounded tweezers or sort of thing, disjoint FRONT. caution 1) Be care of Shooting out damage and scratch not to occur. 8 (2) (1) (3) 1) Remove screw cover using tweezers. 2) Unscrew at the folder upper using a screwdriver caution 1) Be care of Shooting out damage and scratch not to occur. 1) After disjoint the hooker of the lower side, disassemble the LOWER case as below the picture. caution 1) Be care of Shooting out damage and scratch not to occur. 2-5

11 Exploded View and Parts List ) Remove the Speaker/Motor in the LOWER. 2) Remove the LCD in the LOWER. caution 1) Be care of Speaker/Motor wire cracking or damage. 1) Check the separated plastics. caution 1) Check all of the material is taped. 2-6

LCD FPCB, and then put the camera to the PCB.

Put the speaker to the LOWER case, right side slightly.

3 1) Joint folder hinge side of UPPER case.

caution 1) Be care of Shooting out damage and scratch not to

12 Exploded View and Parts List 2-4. Assembly 1 2 Arrange the wire 1) Put the LOWER hinge hall to the LCD FPCB, and then put the camera to the PCB. 2) Put the Speaker to the LOWER case, and then arrange the Wire. Put the speaker to the LOWER case, right side slightly. caution 1) Be care of SPEAKER/MOTOR wire cracking or damage. 3 1) Joint folder hinge side of UPPER case. 2) Joint folder UPPER case side and edge. caution 1) Be care of Shooting out damage and scratch not to occur. 4 1) Screw two point of FOLDER Ass'y. 2) Assemble the SCREW COVER caution 1) Be care of Shooting out damage and scratch not to occur. 1) Put the FPCB to the FRONT hole. 2) Pressing the red colored hinge, assembly the folder and FRONT case caution 1) Pay attention not to damage for LCD FPCB. 2-7

Exploded View and Parts List 5 6 1) Attach anti-dust TAPE 2) Let a KEY PAD on front assy. caution 1) Be care of Shooting out damage and scratch not to occur.

8 joint the hook oint the hook Scwering 1) Joint the shield can right hook and hole of the B'd. 2) Screw the left hall of the B'd.

13 Exploded View and Parts List 5 6 1) Attach anti-dust TAPE 2) Let a KEY PAD on front assy. caution 1) Be care of Shooting out damage and scratch not to occur. 2) Pay attention not to damage for LCD FPCB. 7 1) Lock a LCD CONNECTOR to PBA caution 1) Assemble the LCD connect horizontally. 2) Pay attention not to damage for LCD FPCB. 8 joint the hook oint the hook Scwering 1) Joint the shield can right hook and hole of the B'd. 2) Screw the left hall of the B'd. caution 1) Pay attention not to damage for LCD FPCB. 1) Joint the FRONT upper hook and B'd and arrange the B'd, FRONT. 2) Attach the Volume Key. caution 1) Pay attention not to damage for LCD FPCB. 2) Confirm B'd is attached completely on the FRONT. 2-8

Exploded View and Parts List 9 10 Joint REAR case and FRONT

ASS'Y. 2) Joint the REAR case side, and then edge.

occur. 1) Screw 4 point on REAR assy'. 2) Attach the RF COVER.

14 Exploded View and Parts List 9 10 Joint REAR case and FRONT case. 1) As below picture, joint the REAR upper and FRONT and ASS'Y. 2) Joint the REAR case side, and then edge. caution 1) Be care of Shooting out damage and scratch not to occur. 1) Screw 4 point on REAR assy'. 2) Attach the RF COVER. caution 1) Be care of Shooting out damage and scratch not to occur. 2-9

conductive Tape Attach isolation Tape 1) Attach conduction tape on

2) Attach isolation tape on caution 1) When you attach the tape, be

caution 1) When you attach the tape, be 4 camera connect sticky

caution 1) When you attach the tape, be 1) Attach the GASKET on the

15 Exploded View and Parts List 2-5. LCD KIT ASSEMBLING 1 2 Taping silk line Taping silk line Attach conductive Tape Attach isolation Tape 1) Attach conduction tape on the left and right side of LCD. 2) Attach isolation tape on the left and right side of LCD. caution 1) When you attach the tape, be careful of a base line of a picture. 3 1) Attach the SPONGE along the line. 2) Attach the isolation tape along the line. caution 1) When you attach the tape, be careful of a base line of a picture. 4 camera connect sticky isolation Tape 1) Attach CAMERA CONNECTOR sticky isolation tape. caution 1) When you attach the tape, be careful of a base line of a picture. 1) Attach the GASKET on the LCD CONNECTOR caution 1) When you attach the tape, be careful of a base line of a picture. (Tape should be in the LCD connect.) 2-10

16 3. Flow Chart of Troubleshooting 3-1.Baseband Power ON 'Power On' does not work Check the current consumption Yes Current consumption >= 100mA No Download again Yes Check the Vbat Voltage Voltage >=3.3V No Charge the Battery Yes Check the pin of UCP301 Pin#J12 >= 2.8V No Check UCP301 and C313 Yes Pin#A13 and pin#a14 =2.8V No pin#g11 = 1.8V No Check UCP301 and C314 Yes Yes Check the clock signal at pin#30 #31 of U101 Freq = 26MHz Vrms >=300mV Vpp 900mV No Check the clock generation circuit (relatedtoosc101) Yes Check the clock signal at pin#8 of U101 Freq = 13Mz No Check U101 Yes Check the initial operation END 3-1

17 Flow Chart of Troubleshooting 3-2

18 DSP_DB(0:15) DSP_AB(0:8) DSP_IO DSP_RWN FLASH_RESET FM_EN AMP_EN AS2 AS3 XOENA VMOD_EN RF_EN TX_EN SERLE SERDAT SERCLK DSP_DB(15) DSP_DB(14) DSP_DB(13) DSP_DB(12) DSP_DB(11) DSP_DB(10) DSP_DB(9) DSP_DB(8) DSP_DB(7) DSP_DB(6) DSP_DB(5) DSP_DB(4) DSP_DB(3) DSP_DB(2) DSP_DB(1) DSP_DB(0) DSP_AB(8) DSP_AB(7) DSP_AB(6) DSP_AB(5) DSP_AB(4) DSP_AB(3) DSP_AB(2) DSP_AB(1) DSP_AB(0) G4 J5 K2 K7 M2 N1 P1 L3 R3 C5 E5 G6 A3 B1 C1 DB7 DB3 DB1 AB7 AB5 AB3 AB1 I O RESETN_CSP OCTL1 OCTL3 OCTL5 OCTL7 SERLE1 SERDA C319 C302 VCCD_2.9V VCCA_2.9V UCP301 C318 VCCD_2.9V VDD34 VDD12 UP_CLK UP_RST UP_IO SIM_IO SIM_RST SIM_CLK VSIM VRTC LED2_DRV LED1_DRV RING_DRV VIB_DRV VLDO_7 VLDO_6 VL5S_A VLDO_5 VL4S_B VL4S_A VLDO_4 VLDO_3 VLDO_2 VLDO_1 VACC SCLK_PSC SDO_PSC VEXT VBAT ADC_AUX1 VREF RTC_ALMN 1 CH_BDRV ADC_AUX2 C11 J13 N9 R10 P10 J11 K11 K14 K12 H11 G12 G13 F13 F15 C12 A14 D10 B10 B11 A12 B12 A13 J12 G11 F14 L8 N7 E14 E13 E11 F12 D15 E10 A10 H VBAT TP_INTRQ TP_PWR_KEEP TR301 C304 VBAT C317 SIMCLK SIMDATA SIMRST SIM_RST SIM_IO SIM_CLK VSIM KEY_BL1 MOT BAND_SEL2 BAND_SEL1 UP_SDO UP_SCLK UP_CS UP_SDI VREF RTCALARM VIB_EN INTRQ PWR_KEEP RST KEY_COL(2) KEY_ROW(0) C308 VCCB_2.9V VRF_2.9V VCCD_1.8V VCCA_2.9V VCCD_2.9V C309 C310 C311 C312 C313 C314 C315 R305 VRTC_3V RB414_IV02N BAT101 Flow Chart of Troubleshooting 1 2 VL5S_B C9 CSN_PSC K8 SDI_PSC M7 CH_ISEN CH_RES D14 CREF E9 C303 C301 NC6 2 NC5 1 GNDS17 K10 GNDS16 J10 GNDS15 J9 GNDS14 J8 J7 H GNDS13 GNDS12 9 GNDS11 GNDS10 GNDS9 GNDS8 GNDS7 GNDS6 GNDS5 GNDS4 GNDS3 GNDS2 GNDS1 AUX_ADC3 GND_OCTL VDD_OCTL GNDV VDDV GNDB VDDB GNDD VDDD VSS4 VSS3 VSS2 VSS1 VDD_IO2 VDD_IO1 VDD3 VDD2 VDD1 GND_HCUR GND_PSC2 GND_PSC1 GNDQ VDD67 VDD5 H8 H7 H6 G10 G9 G8 G7 F10 F9 F8 F7 D13 B4 C4 P13 L11 F6 A6 M10 N11 P6 R2 K4 G5 J4 N5 N6 M3 J3 F11 K15 B15 E8 B13 C10 D2 DB15 D3 DB14 E3 DB13 E2 DB12 F3 DB11 F2 DB10 F1 DB9 F4 DB8 G3 DB6 H5 DB5 J6 DB4 K3 DB2 K1 DB0 K5 AB8 M1 AB6 N2 AB4 L5 AB2 K6 AB0 L2 RWN E6 OCTL0 F5 OCTL2 A4 OCTL4 B3 OCTL6 A2 SERLE2 C2 SERCK D9 AFC E7 TXP B5 RAREF2 B6 RAREF1 D7 RXTXIP D6 RXTXIN C7 RXTXQP C6 RXTXQN P11 AOUTAP N12 AOUTAN R12 AOUTBP P12 AOUTBN N14 MICINP M14 MICINN N15 MICOUTP P15 MICOUTN M15 AUXINP L14 AUXINN K13 AUXOUTP L13 AUXOUTN R13 VXVCM M13 VREGP R14 VREGN R4 DAICK P4 DAIRN L6 DAIDI M6 DAIDO N4 RTC_CLK D1 XOENAQ R6 MC P5 NC7 P3 DINTR C14 PWR_SW2 C15 PWR_SW1N L7 PSW1_BUF K9 RESET_ O N10 MODE M9 PWR_KEEP L10 INTRQ L9 VIB_RNG_EN AFC TX_PWR RTX_IP RTX_IN RTX_QP RTX_QN AOUTAP AOUTAN AOUTBP AOUTBN MICINP MICINN MICOUTP MICOUTN AUXINP AUXINN AUXOUTP AUXOUTN CLK32K CLK13M_MC DSP_INT PWR_ON JIG_ON 3-3

19 NC G N ND C XEN XTAL1 XTAL2 VDD VDD AFC XDIV XMODE _PDN _RESET VIO VDD VDD GND RFOL RFOH Flow Chart of Troubleshooting VCCD_2.9V VRF_2.9V C102 GSM_PAM_IN CLK13M_TR C105 R107 RF_EN C104 DPCS_PAM_IN CLK13M_MC CLK13M_YMU CLK13M_AIT701X C108 C110 R108 R102 R103 R104 RTX_IP RTX_IN RTX_QP RTX_QN SERDAT SERLE SERCLK 8 XOUT 7 BIP 6 BIN 5 BQP 4 BQN 3 SDIO 1 SCLK U101 RFIPP RFIPN RFIDP RFIDN RFIEP RFIEN RFIAP RFIAN PCS_LNA_IN_P PCS_LNA_IN_N DCS_LNA_IN_P DCS_LNA_IN_N GSM_LNA_IN_P GSM_LNA_IN_N R105 AFC XOENA C119 OSC HOT GND2 C121 C122 C123 GND1 HOT

20 Flow Chart of Troubleshooting Initial Initial Failure Yes The pin #G11 of UCP301 = 1.8V and the pin #J12 of UCP301 = 2.8V? No Check the UCP301 (if it has some problem, it is to be replaced.) Yes Is the pin #K9 of UCP301 "Low High"? No Check the UCP301 (if it has some problem, it is to be replaced.) Yes There is kHz wave forms at the C223 and C224 No Check the UCP201 Yes Is the pin #G4 of UCP201 is "High" No Check the UCP201 Yes The voltage is "High" at the C311,C312,C313 No Check the UCP301 Yes LCD display is O.K No Check the LCD part Yes Sound is O.K No Check the Audio part Yes END 3-5

21 Flow Chart of Troubleshooting 3-6

22 L4 L5 M4 T1 R2 T3 U3 P3 T4 N3 K5 N1 F3 E1 H4 L3 G5 F1 G6 G3 U12 N10 L2 L1 K4 J6 R5 H6 H5 F4 M3 G2 G4 E4 P13 N17 M17 D7 G8 C7 F9 D13 CP_KB[0]/TR_CS_IRAM CP_KB[1]/TR_CS_IROM CP_KB[2]/TR_CS_PERF CP_KB[3]/TR_CS_IPCP CP_KB[4]/TR_SIZE0 CP_KB[5]/TR_CLK CP_KB[6]/TR_PROT0 CP_KB[7]/TR_SIZE1 CP_KB[8]/TR_NEXEC CP_KB[9]/TR_GNT_DMA XPA11/IRDARX XPA12/IRDATX PA30/IM0 PA31/IM1 XPA15/TX0 XPA16/RX0 PA28/IOM0 PA29/IOM1 PA13/TX1 PA14/RX1 SIM_DATA/SM0_DATA SIM_CLK/SM0_CLK PA19/CP_MO PA20/CP_MI XPA21/CP_SCK PA22/SM1_DATA XPWM1 XPA23/PWM2 XPA24/PWM3 FLASH_RESET PA25/OM0 PA26/OM1 PA27/SM1_CLK PN17/DRQ PA18/T_ACK PA33/T_REQA PA34/T_REQB XCP_TCK XCP_TMS XCP_TDI XCP_TRSTN XCP_TDO XPA36_A23_CS5N XPA35_A22 VDD XPA32_CS0N VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VDD VDD VDD VDD VDD VDD VDD VDD VDD VDDE VDDE VDDE VDDE VDDE VDDE VDDE VDDE VDDE VDDE VSS_DPLL VDD_DPLL XVREF VSSA VDDA VRTC CKI RSTB 1 NC N C 2 N15 L13 L17 H14 L9 J11 L8 M7 L10 L6 K7 K6 J7 H11 H7 G10 G9 F6 A3 A2 C16 A5 R17 R16 T13 R4 R1 G1 E2 B14 E17 E16 N16 U16 U15 P8 U2 M1 B1 E15 G16 F10 E10 C11 D8 F17 C12 Flow Chart of Troubleshooting VRTC_3V VCCD_1.8V VCCD_1.8V VCCD_2.9V VCCD_1.8V VCCD_2.9V R204 C215 C213 C214 C216 ZD201 AIT_INT A(22) A(23) CORE_TP VREF CLK13M_TR TR_RST D(0:15) A(0:20) R205 A(21) CP_CSROMEN CP_CSRAMEN AIT_SUB_CS AIT_CS DLC_DETECT YMU_EN CP_WEN CP_OEN AIT_LCD_BY UPPER_BYTE INTRQ FM_INT FLIP_SNS YMU_IRQ D(0) D(1) D(2) D(3) D(4) D(5) D(6) D(7) D(8) D(9) D(10) D(11) D(12) D(13) D(14) D(15) A(0) A(1) A(2) A(3) A(4) A(5) A(6) A(7) A(8) A(9) A(10) A(11) A(12) A(13) A(14) A(15) A(16) A(17) A(18) A(19) A(20) A6 XCP_D0 B5 XCP_D1 F8 XCP_D2 F7 XCP_D3 C5 XCP_D4 D6 XCP_D5 E7 XCP_D6 D5 XCP_D7 C4 XCP_D8 B4 XCP_D9 B3 XCP_D10 C1 XCP_D11 C2 XCP_D12 D2 XCP_D13 D3 XCP_D14 E3 XCP_D15 B13 XCP_A0_BEON F11 XCP_A1 E14 XCP_A2 D15 XCP_A3 B15 XCP_A4 C14 XCP_A5 A16 XCP_A6 A15 XCP_A7 B17 XCP_A8 C17 XCP_A9 D16 XCP_A10 F14 XCP_A11 G14 XCP_A12 G13 XCP_A13 G17 XCP_A14 J12 XCP_A15 K12 XCP_A16 K13 XCP_A17 K14 XCP_A18 L14 XCP_A19 L15 XCP_A20 L16 XCP_A21 A12 XCP_CSROMEN A13 XCP_CSRAMEN M15 XPA0/CS1N M14 XPA1/CS2N M11 XPA2/CS3N N14 XPA3/CS4N C13 XCP_WEN P16 XPA4/OEN P15 XPA5/WAITN T15 XPA6/BE1N M9 XPA7/IRQ1 T5 P2 XPA8/IRQ2 XPA9/IRQ3 N2 XPA10/IRQ4 UCP201 TDO F12 TRST F15 H12 TDI TMS G12 TCK H13 G15 CKO/IACK/ERAMHI L12 IOBIT[2]/VEC[3]/EROMHI K11 IOBIT[1]/VEC[4]/PLLTOA N4 INT#0 R12 IO7 U5 RWN AB#8 AB#7 AB#6 AB#5 AB#4 AB#3 AB#2 AB#1 AB#0 P10 DB#15 DB#14 R11 DB#13 T11 U11 DB#12 DB#11 M8 N8 DB#10 N7 DB#9 DB#8 P7 DB#7 M6 R7 DB#6 DB#5 T7 DB#4 U7 P6 DB#3 R6 DB#2 U6 DB#1 P5 DB#0 XTIC_MODE D12 XCPTSTSTOP_CKO T17 T14 R14 P12 P11 N11 R13 M10 U13 M12 XAG3 D11 E11 XAG2 A11 XAG1 XAG0 B11 B7 XBSWN A7 X1RTC X2RTC D10 E8 XRTCALARM_N XOSC32OUT C6 R206 DSP_INT DSP_AB(8) DSP_AB(7) DSP_AB(6) DSP_AB(5) DSP_AB(4) DSP_AB(3) DSP_AB(2) DSP_AB(1) DSP_AB(0) DSP_DB(15) DSP_DB(14) DSP_DB(13) DSP_DB(12) DSP_DB(11) DSP_DB(10) DSP_DB(9) DSP_DB(8) DSP_DB(7) DSP_DB(6) DSP_DB(5) DSP_DB(4) DSP_DB(3) DSP_DB(2) DSP_DB(1) DSP_DB(0) ICHRG TR_RST RTCALARM CLK32K TR_RST CHG_OFF DSP_INT DSP_IO DSP_RWN DSP_AB(8:0) DSP_DB(15:0) R208 VBAT R207 C221 VCCB_2.9V U202 1 VOUT VCC NC GND R209 C222 OSC200 KEY_COL(0:4) C223 C224 I2C_CLK I2C_DAT VCCD_2.9V R210 KEY_ROW(0:4) R211 DEBUG_DTR DEBUG_RTS DEBUG_TXD DEBUG_RXD DEBUG_CTS CHG_DET SDS_TXD SDS_RXD SIMDATA SIMCLK KEY_COL(0) KEY_COL(1) KEY_COL(2) KEY_COL(3) KEY_COL(4) KEY_ROW(0) KEY_ROW(1) KEY_ROW(2) KEY_ROW(3) KEY_ROW(4) CP_TDO TR_RST CP_TDI CP_TMS CP_TCK DEBUG_DSR EAR_SWITCH AS1 JACK_IN PWR_KEEP SIMRST FLASH_RESET BL_EN BP_VF UP_CS UP_SCLK UP_SDO UP_SDI 3-7

23 Flow Chart of Troubleshooting Sim Part "Insert SIM is displayed on the LCD Yes Check the SIM connector's (SIM100) connection to SIM card No Resolder or change SIM601 Yes Check the voltage at pin#1 of SIM100 >= 2.8V? No Check the UCP301 Yes Is there any signals pin#2,#3,#4 of SIM100? No Check the UCP301 Yes Check the SIM Card END SIM_IO SIM GG GG SIM_RST VSIM SIM_CLK C638 C639 C640 C641 C

24 Flow Chart of Troubleshooting 3-9

25 Flow Chart of Troubleshooting Microphone Part Microphone does not work Yes Is the assembled status of microphone O.K? No Reassembled the microphone Yes Check the reference voltage on mic path Yes VR V? No Resolder or change R411,R414,C413,C414,C418,C420 C421,R422,C415,C419,R416,R419 R415,R420 1 Yes Is microphone ok? No Check UCP301 2 Yes END 3-10

26 Flow Chart of Troubleshooting VCCA_2.9V R411 C413 C414 R414 MICOUTP MICINP R415 R416 C415 MIC401 MICINN R419 C418 MICOUTN R420 C419 R422 C421 C420 VR401 VR

27 Flow Chart of Troubleshooting Receiver Part There is no sound from the Receiver Yes Is the terminal of Receiver O.K? No Replace the Receiver Yes Is there any signals at the pin#p11 and pin#n12 of UCP301? No Check UCP301 Check V101,V102 (LCD PCB Part) Yes END Speaker Part There is no sound from the Buzzer Yes Is the terminal of Speaker O.K? No Replace the Speaker Yes Is there any signals at the pin#r12 and pin#p12 of UCP100? No Check U406,V601,V602 Yes END 3-12

28 Flow Chart of Troubleshooting <LCDPCBPart> 3-13

29 Flow Chart of Troubleshooting 3-2.RF EGSM RX CONTINUOUS RX ON RF INPUT :62CH AMP :-50dBm RMAL CONDITION catch the channel? CHECK ANT contact? U100 CHECK pin12-65dbm? U100,RFS101 resolder or change U100 CHECK pin16-65dbm? U100 resolder or change F100 CHECK pin3,4-65dbm? F100 resolder or change U101 CHECK pin21,22-65dbm? C101,C106,L102 resolder or change U101 pin 13 : 2.9V? UCP301 pina13, C312 change or resolder U101 CHECK pin 30,31 freq :26MHz? Vp-p : 380mV? OSC101 change or resolder U101 pin 4,5,6,7 Vp-p : 120mV? U101 resolder or change UCP301 CHECK!! 3-14

30 Flow Chart of Troubleshooting 3-15

31 Flow Chart of Troubleshooting DCS RX CONTINUOUS RX ON RF INPUT : 698CH AMP :-50dBm RMAL CONDITION catch the channel? CHECK ANT contact? U100 CHECK pin12-65dbm? U100,RFS101 resolder or change U100 CHECK pin18-65dbm? U100 resolder or change F101 CHECK pin3,4-65dbm? F101 resolder or change U101 CHECK pin19,20-65dbm? C13,C116,L108 resolder or change U101 pin 13 : 2.9V? UCP301 pina13, C312 change or resolder U101 CHECK pin 30,31 freq :26MHz? Vp-p : 380mV? OSC101 change or resolder U101 pin 4,5,6,7 Vp-p : 120mV? U101 resolder or change UCP301 CHECK!! 3-16

32 Flow Chart of Troubleshooting 3-17

33 Flow Chart of Troubleshooting EGSM TX U100 pin12 : about 2~3 dbm? U100 pin6 : 2.8 V? UCP301 check & change CONTIUS TX ON CONDITION TX POWER DAC: 600 CODE APPLIED CH : 62 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF LEV. : 10dBm ATT. : 20dB C111,RFS101 check&change U100 pin7 : 3.7 V? BATTERY check & change U100 pin 8 : 1.6V? R106 Check U100 pin11 about : -5dBm? U100 pin 4 : 2.9V? U100 change or resolder UCP301 check U101 pin13 : 2.9V? UCP301pinA13,C312 change or resolder U101 pin30,31 : 26MHz? Vp-p : 380mV? OSC101 change or resolder U101 pin4,5,6,7 : 100mV? UCP301 change or resolder U101 change or resolder 3-18

34 Flow Chart of Troubleshooting 3-19

35 Flow Chart of Troubleshooting DCS TX U101 pin12 : about 2~3 dbm? U100 pin6 : 2.8 V? UCP301 check & change CONTINUOUS TX ON CONDITION CH : 698CH(DCS) TX POWER CODE: 520 CODE Aplied RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF LEV. : 10dBm ATT. : 20dB C111,RFS101 check&change U100 pin7 : 3.7 V? BATTERY check & change U100 pin 8 : 1.6V? R106 Check U100 pin1 about : -5dBm? U100 pin 4 : 0V? U100 change or resolder UCP301 check U101 pin13 : 1.9V? UCP301pinA13,C312 change or resolder U101 pin30,31 : 26MHz? Vp-p : 380mV? OSC101 change or resolder U101 pin4,5,6,7 :100mV? UCP301 change or resolder U101 change or resolder 3-20

36 Flow Chart of Troubleshooting 3-21

37 VBATT VTX VBS2 VMOD_EN GSM TXIN RX1 RX2 RX3 RX4 ANT Flow Chart of Troubleshooting GSM_LNA_IN_N GSM_LNA_IN_P L102 C101 C F100 OUT 1 OUT IN G G 5 2 C103 L103 RFS R109 R110 ANT ANT L104 DCS_LNA_IN_N L108 C F101 OUT 1 OUT IN G G 5 2 C115 C111 C112 L105 C109 C107 ANT DCS_LNA_IN_P C116 PCS_LNA_IN_N L109 C117 F102 3 OUT 4 1 OUT IN G G 5 2 C118 PCS_LNA_IN_P C GND5 19 GND4 17 GND3 U100 VCC2 VCC1 L GND2 13 GND1 1 DCS PCSI N 8 VRAM P 4 VBS 1 V1 C125 C124 DPCS_PAM_IN VBAT GSM_PAM_IN C127 C126 TX_PWR TX_EN R106 VMOD_EN BAND_SEL2 BAND_SEL1 C128 C129 C130 C131 C

38 NC G N ND C XEN XTAL1 XTAL2 VDD VDD AFC XDIV XMODE _PDN _RESET VIO VDD VDD GND RFOL RFOH Flow Chart of Troubleshooting VCCD_2.9V VRF_2.9V C102 GSM_PAM_IN CLK13M_TR C105 R107 RF_EN C104 DPCS_PAM_IN CLK13M_MC CLK13M_YMU CLK13M_AIT701X C108 C110 R108 R102 R103 R104 RTX_IP RTX_IN RTX_QP RTX_QN SERDAT SERLE SERCLK 8 XOUT 7 BIP 6 BIN 5 BQP 4 BQN 3 SDIO 1 SCLK U101 RFIPP RFIPN RFIDP RFIDN RFIEP RFIEN RFIAP RFIAN PCS_LNA_IN_P PCS_LNA_IN_N DCS_LNA_IN_P DCS_LNA_IN_N GSM_LNA_IN_P GSM_LNA_IN_N R105 AFC XOENA C119 OSC HOT GND2 C121 C122 C123 GND1 HOT

39 4. Array course control 4-1

40 Array course control Software Downloading 4-1. Downloading Binary Files ㆍ Three binary files for downloading M300 - M300XXYY.s3 : Main source code binary 4-2. Pre-requsite for Downloading ㆍ Downloader Program(OptiFlash.exe) ㆍ M300 Mobile Phone ㆍ Data Cable ㆍ Binary files 4-2

41 Array course control 4-3. S/W Downloader Program 1. Load the binary download program by executing the "Optiflash.exe" 2. Select the "Options" "Settings" "Generic" "Specify hardware platform". Choose hardware platform for the downloader file setting. Set the everything else as the default values which are shown below 4-3

42 Array course control 3.Select the COM port when the download cable is connected Additionally you can select the maximum transfer speed OptiFlash will use to communicate with the phone. However, OptiFlash will use a slower speed if either the PC's or the phone's serial hardware is incapable of handling the selected speed 4-4

43 Array course control 4. Select the "Flash&Verify" "Browse" Set the directory path and choose the lastet s/w binary, for example "M300XXYY.s3", for the downloader binary setting. Make sure that not to change the reserved memory regions. In case of M300 the reserved regions are : - 0x x0001ffff 4-5

44 Array course control 5. Click "OK" button then press "Flash". (Before pressing 'Flash' button, push the button '*'and 'END' at the same time. Then press 'Flash'.) Downloader will upload the binary file as below for the downloading. 6. When downloading is finished successfully, there is a"all is well" message. 7. After finishing downloading, Certain memory resets should be done to guarantee the normal performance. 8. Confirm the downloaded version name and etc. : *#1234# Full Reset : *2767*3855# 4-6

45 5. Block Diagrams 5-1

46 Block Diagrams 5-2

47 6. PCB Diagrams 6-1 ANT101 ANT102 BAT101 BTC601 C224 CP_CSRAMCP_OENCORE_TP CP_TCK CP_TDI CP_TDO CP_TMS CP_WEN DSP_INT F100 F101 F102 G101 G102 G103 G104 G105 HEA601 IFC601 MIC401 OSC101 OSC200 RFS101 RST SIM601 SW501 SW502 TA501 TA601 TP201 TP202 TP203 TP204 TP205 TP_A(1) TP_AIT_CS TP_AIT_INT TP_CSROM TP_D(0) TP_GND TP_INTRQ TP_PWR_KEEP TP_UPPER_BY TE TR301 U100 U101 U202 U203 U301 U302 U401 U402 U403 U404 U405 U406 U501 U602U601 UCP201 UCP301 UME201 V601 V602 V603 V604 V605 VR401 VR402 VR501 VR502 VR503 VR504 VR505 R506 V 7 VR50 VR508 VR509 VR510 VR511 ZD201 ZD501 ZD601ZD602 ZD603 ZD604

48 SEND MENU STO LEFT RIGHT PCB Diagrams U201 UP I DOWN CLEAR PWR * 10 SHARP LED301 LED

49 7. MAIN Electrical Parts List SEC CODE Design LOC Discirption STATUS ZD603 DIODE-ZENER SA ZD601 DIODE-TVS SA ZD602 DIODE-TVS SA ZD604 DIODE-TVS SA ZD201 DIODE-TVS SA ZD501 DIODE-TVS SA TR301 TR-DIGITAL SA LED301 LED SA LED302 LED SA U302 IC-CMOS LOGIC SA U404 IC-ANALOG SWITCH SA U405 IC-ANALOG MULTIPLEX SA U601 IC-ANALOG MULTIPLEX SA U602 IC-ANALOG MULTIPLEX SA U403 IC-ANALOG SWITCH SA U201 IC-HALL EFFECT S/W SA UME201 IC-MCP SA U402 IC-AUDIO AMP SA U100 IC-POWER AMP SA UCP301 IC-POWER SUPERVISOR SA U301 IC-BATTERY SA U406 IC-MELODY SA U401 IC-TUNER SA U101 IC-TRANSCEIVER SA U202 IC-SENSOR SA V601 VARISTOR SA V602 VARISTOR SA VR401 VARISTOR SA VR402 VARISTOR SA VR503 VARISTOR SA VR510 VARISTOR SA V603 VARISTOR SA V604 VARISTOR SA V605 VARISTOR SA VR501 VARISTOR SA VR502 VARISTOR SA 7-1

50 Main Electrical Parts List SEC CODE Design LOC Discirption STATUS VR504 VARISTOR SA VR505 VARISTOR SA VR506 VARISTOR SA VR507 VARISTOR SA VR508 VARISTOR SA VR509 VARISTOR SA VR511 VARISTOR SA R305 R-CHIP SA R406 R-CHIP SA R407 R-CHIP SA R203 R-CHIP SA R206 R-CHIP SA R209 R-CHIP SA R109 R-CHIP SA R110 R-CHIP SA R311 R-CHIP SA R312 R-CHIP SA R417 R-CHIP SA R418 R-CHIP SA R620 R-CHIP SA R309 R-CHIP SA R425 R-CHIP SA R404 R-CHIP SA R405 R-CHIP SA R302 R-CHIP SA R207 R-CHIP SA R208 R-CHIP SA R416 R-CHIP SA R419 R-CHIP SA R507 R-CHIP SA R509 R-CHIP SA R103 R-CHIP SA R102 R-CHIP SA R427 R-CHIP SA R210 R-CHIP SA R211 R-CHIP SA 7-2

51 Main Electrical Parts List SEC CODE Design LOC Discirption STATUS R301 R-CHIP SA R308 R-CHIP SA R401 R-CHIP SA R613 R-CHIP SA R614 R-CHIP SA R615 R-CHIP SA R616 R-CHIP SA R617 R-CHIP SA R618 R-CHIP SA R619 R-CHIP SA R205 R-CHIP SA R303 R-CHIP SA R403 R-CHIP SA R408 R-CHIP SA R410 R-CHIP SA R412 R-CHIP SA R603 R-CHIP SA R606 R-CHIP SA R607 R-CHIP SA R609 R-CHIP SA R610 R-CHIP SA R105 R-CHIP SA R106 R-CHIP SA R201 R-CHIP SA R202 R-CHIP SA R501 R-CHIP SA R104 R-CHIP SA R108 R-CHIP SA R402 R-CHIP SA R429 R-CHIP SA R411 R-CHIP SA R504 R-CHIP SA R107 R-CHIP SA R424 R-CHIP SA R426 R-CHIP SA R428 R-CHIP SA 7-3

52 Main Electrical Parts List SEC CODE Design LOC Discirption STATUS R621 R-CHIP SA R622 R-CHIP SA R506 R-CHIP SA R510 R-CHIP SA R423 R-CHIP SA R415 R-CHIP SA R420 R-CHIP SA R304 R-CHIP SA R307 R-CHIP SA R611 R-CHIP SA R602 R-CHIP SA R604 R-CHIP SA R601 R-CHIP SNA R204 R-CHIP SA R414 R-CHIP SA R505 R-CHIP SA R422 R-CHIP SA R511 R-CHIP SA C222 C-CER,CHIP SA C315 C-CER,CHIP SA C402 C-CER,CHIP SA C420 C-CER,CHIP SA C421 C-CER,CHIP SA C429 C-CER,CHIP SA C427 C-CER,CHIP SA C207 C-CER,CHIP SA C643 C-CER,CHIP SA C104 C-CER,CHIP SA C108 C-CER,CHIP SA C128 C-CER,CHIP SA C130 C-CER,CHIP SA C131 C-CER,CHIP SA C132 C-CER,CHIP SA C423 C-CER,CHIP SA C424 C-CER,CHIP SA C509 C-CER,CHIP SA 7-4

53 Main Electrical Parts List SEC CODE Design LOC Discirption STATUS C641 C-CER,CHIP SA C642 C-CER,CHIP SA C418 C-CER,CHIP SA C614 C-CER,CHIP SA C631 C-CER,CHIP SA C215 C-CER,CHIP SA C223 C-CER,CHIP SA C224 C-CER,CHIP SA C626 C-CER,CHIP SA C627 C-CER,CHIP SA C105 C-CER,CHIP SA C103 C-CER,CHIP SA C115 C-CER,CHIP SA C118 C-CER,CHIP SA C129 C-CER,CHIP SA C101 C-CER,CHIP SA C106 C-CER,CHIP SA C112 C-CER,CHIP SA C416 C-CER,CHIP SA C428 C-CER,CHIP SA C640 C-CER,CHIP SA C110 C-CER,CHIP SA C119 C-CER,CHIP SA C124 C-CER,CHIP SA C414 C-CER,CHIP SA C506 C-CER,CHIP SA C203 C-CER,CHIP SA C212 C-CER,CHIP SA C307 C-CER,CHIP SA C113 C-CER,CHIP SA C116 C-CER,CHIP SA C117 C-CER,CHIP SA C120 C-CER,CHIP SA C304 C-CER,CHIP SA C121 C-CER,CHIP SA C123 C-CER,CHIP SA 7-5

54 Main Electrical Parts List SEC CODE Design LOC Discirption STATUS C125 C-CER,CHIP SA C126 C-CER,CHIP SA C206 C-CER,CHIP SA C208 C-CER,CHIP SA C210 C-CER,CHIP SA C214 C-CER,CHIP SA C217 C-CER,CHIP SA C218 C-CER,CHIP SA C219 C-CER,CHIP SA C220 C-CER,CHIP SA C221 C-CER,CHIP SA C301 C-CER,CHIP SA C319 C-CER,CHIP SA C408 C-CER,CHIP SA C431 C-CER,CHIP SA C502 C-CER,CHIP SA C503 C-CER,CHIP SA C615 C-CER,CHIP SA C630 C-CER,CHIP SA C639 C-CER,CHIP SA C425 C-CER,CHIP SA C102 C-CER,CHIP SA C111 C-CER,CHIP SA C601 C-CER,CHIP SA C602 C-CER,CHIP SA C603 C-CER,CHIP SA C604 C-CER,CHIP SA C605 C-CER,CHIP SA C606 C-CER,CHIP SA C607 C-CER,CHIP SA C608 C-CER,CHIP SA C609 C-CER,CHIP SA C610 C-CER,CHIP SA C611 C-CER,CHIP SA C612 C-CER,CHIP SA C613 C-CER,CHIP SA 7-6

55 Main Electrical Parts List SEC CODE Design LOC Discirption STATUS C617 C-CER,CHIP SA C618 C-CER,CHIP SA C619 C-CER,CHIP SA C620 C-CER,CHIP SA C621 C-CER,CHIP SA C622 C-CER,CHIP SA C623 C-CER,CHIP SA C624 C-CER,CHIP SA C625 C-CER,CHIP SA C628 C-CER,CHIP SA C629 C-CER,CHIP SA C638 C-CER,CHIP SA C306 C-CER,CHIP SA C308 C-CER,CHIP SA C309 C-CER,CHIP SA C310 C-CER,CHIP SA C311 C-CER,CHIP SA C313 C-CER,CHIP SA C316 C-CER,CHIP SA C318 C-CER,CHIP SA C401 C-CER,CHIP SA C403 C-CER,CHIP SA C404 C-CER,CHIP SA C405 C-CER,CHIP SA C406 C-CER,CHIP SA C407 C-CER,CHIP SA C410 C-CER,CHIP SA C411 C-CER,CHIP SA C412 C-CER,CHIP SA C422 C-CER,CHIP SA C434 C-CER,CHIP SA C501 C-CER,CHIP SA C504 C-CER,CHIP SA C616 C-CER,CHIP SA C635 C-CER,CHIP SA C644 C-CER,CHIP SA 7-7

56 Main Electrical Parts List SEC CODE Design LOC Discirption STATUS C507 C-CER,CHIP SA C508 C-CER,CHIP SA C122 C-CER,CHIP SA C216 C-CER,CHIP SA C317 C-CER,CHIP SA C409 C-CER,CHIP SA C426 C-CER,CHIP SA C636 C-CER,CHIP SA C312 C-CER,CHIP SA C314 C-CER,CHIP SA C417 C-CER,CHIP SA C430 C-CER,CHIP SA C432 C-CER,CHIP SA C433 C-CER,CHIP SA C201 C-CER,CHIP SA C202 C-CER,CHIP SA C204 C-CER,CHIP SA C205 C-CER,CHIP SA C209 C-CER,CHIP SA C211 C-CER,CHIP SA C213 C-CER,CHIP SA C302 C-CER,CHIP SA C303 C-CER,CHIP SA C415 C-CER,CHIP SA C419 C-CER,CHIP SA C127 C-TA,CHIP SA TA601 C-TA,CHIP SA C413 C-TA,CHIP SA TA501 C-TA,CHIP SA L105 INDUCTOR-SMD SA L102 INDUCTOR-SMD SA L108 INDUCTOR-SMD SA L109 INDUCTOR-SMD SA L110 INDUCTOR-SMD SA L103 INDUCTOR-SMD SA L104 INDUCTOR-SMD SA 7-8

57 Main Electrical Parts List SEC CODE Design LOC Discirption STATUS L603 INDUCTOR-SMD SA OSC200 CRYSTAL-SMD SA OSC101 CRYSTAL-SMD SA F100 FILTER-SAW SA F101 FILTER-SAW SA F102 FILTER-SAW SA L201 BEAD-SMD SA L403 BEAD-SMD SA L401 BEAD-SMD SA L402 BEAD-SMD SA L601 BEAD-SMD SA L602 BEAD-SMD SA SW501 SWITCH-TACT SA SW502 SWITCH-TACT SA RFS101 CONNECTOR-COAXIAL SA SIM601 CONNECTOR-CARD EDGE SA IFC601 SOCKET-INTERFACE SA BTC601 HEADER-BATTERY SA HEA601 HEADER-BOARD TO BOARD SA BAT101 BATTERY-LI(2ND) SA GH A UCP201 IC MICOM-SGHX480 SA GH A U501 IC ASIC-SGHC510 SA GH A ANT101 NPR-ANTENNA CONTACT SA GH A ANT102 NPR-ANTENNA CONTACT SA 7-9

58 8. Reference data 8-1. Reference Abbreviate AAC: Advanced Audio Coding. AVC : Advanced Video Coding. BER : Bit Error Rate BPSK: Binary Phase Shift Keying CA : Conditional Access CDM : Code Division Multiplexing C/I : Carrier to Interference DMB : Digital Multimedia Broadcasting EN : European Standard ES : Elementary Stream ETSI: European Telecommunications Standards Institute MPEG: Moving Picture Experts Group PN : Pseudo-random Noise PS : Pilot Symbol QPSK: Quadrature Phase Shift Keying RS : Reed-Solomon SI : Service Information TDM : Time Division Multiplexing TS : Transport Stream 8-1

59 9. Safety Precautions 9-1. Repair Precaution Repair in Shield Box, during detailed tuning. Take specially care of tuning or test, because specipicty of cellular phone is sensitive for surrounding interference(rf noise). Be careful to use a kind of magnetic object or tool, because performance of parts is damaged by the influence of manetic force. Surely use a standard screwdriver when you disassemble this product, otherwise screw will be worn away. Use a thicken twisted wire when you measure level. A thicken twisted wire has low resistance, therefore error of measurement is few. Repair after separate Test Pack and Set because for short danger (for example an overcurrent and furious flames of parts etc) when you repair board in condition of connecting Test Pack and tuning on. Take specially care of soldering, because Land of PCB is small and weak in heat. Surely tune on/off while using AC power plug, because a repair of battery charger is dangerous when tuning ON/OFF PBA and Connector after disassembing charger. Don't use as you pleases after change other material than replacement registered on SEC System. Otherwise engineer in charge isn't charged with problem that you don't keep this rules. 9-1

60 Safety Precautions 9-2. ESD(Electrostatically Sensitive Devices) Precaution Several semiconductor may be damaged easilly by static electricity. Such parts are called by ESD(Electrostatically Sensitive Devices), for example IC,BGA chip etc. Read Precaution below. You can prevent from ESD damage by static electricity. Remove static electricity remained your body before you touch semiconductor or parts with semiconductor. There are ways that you touch an earthed place or wear static electricity prevention string on wrist. Use earthed soldering steel when you connect or disconnect ESD. Use soldering removing tool to break static electricity., otherwise ESD will be damaged by static electricity. Don't unpack until you set up ESD on product. Because most of ESD are packed by box and aluminum plate to have conductive power,they are prevented from static electricity. You must maintain electric contact between ESD and place due to be set up until ESD is connected completely to the proper place or a circuit board. 9-2

61 10. Product Function Main Function - SDN (Service Dialling Numbers) - Read SMS or MMS messages - Voic - SOS message - FM radio 10-1

62 GSPN (Global Service Partner Network) Country North America Latin America CIS Europe China Asia Mideast & Africa Web Site service.samsungportal.com latin.samsungportal.com cis.samsungportal.com europe.samsungportal.com china.samsungportal.com asia.samsungportal.com mea.samsungportal.com This Service Manual is a property of Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable International and/or domestic law. c Samsung Electronics Co.,Ltd Rev.1.0

SGH-M Specification. 2. Exploded View and Parts list. 3. Chart of Troubleshooting. 4. Array course control. 5. Block Diagrams. 6.

SGH-M Specification. 2. Exploded View and Parts list. 3. Chart of Troubleshooting. 4. Array course control. 5. Block Diagrams. 6. GSM TELEPHONE SGH-M300 GSM TELEPHONE CONTENTS 1. Specification 2. Exploded View and Parts list 3. Chart of Troubleshooting 4. Array course control 5. Block Diagrams 6. PCB Diagrams 7. MAIN Electrical Parts