GSM TELEPHONE SGH-E720 GSM TELEPHONE CONTENTS 1. Specification 2. Flow Chart of Troubleshooting 3. Exploded Views and Parts List 4. Electrical Parts List 5. PCB Diagrams 6.
1. SGH-E720 Specification 1-1. GSM General Specification GSM900 Phase 1 EGSM 900 Pha se 2 DCS1800 Phase 1 PCS1900 Freq. Ban d [M Hz ] Upl in k/Downl in k 89 0~ 91 5 93 5~ 96 0 88 0~ 91 5 92 5~ 96 0 1 71 0~ 1 78 5 1 80 5~ 1 88 0 18 50 ~1 91 0 19 30 ~1 99 0 A RF C N ra n g e 1 ~ 1 24 0 ~ 1 24 & 9 75 ~ 10 23 51 2~8 85 5 12 ~ 8 10 Tx/Rx spaci ng 45 MHz 45 MHz 95 MHz 8 0M H z Mod. Bit rat e/ Bit Period 270.833kbp s 3.692us 2 70 . 8 33 k b ps 3.692us 270.833kbp s 3.692us 27 0. 83 3kb p s 3.
SGH-E720 Specification 1-2.
2. SGH-E720 Flow Chart of Troubleshooting 2-1.Baseband 2-1-1. Power ON 'Power ON' Does not work Check the current consumption Current consumption NO Down load again ≥100mA ? YES Check the V bat. voltage NO Voltage ≥ 3.3V ? Charge the Battery YES Check the pins of U401 NO C415 ≥ 1.8V ? Check U401 and C415 YES C418 and C419 = 2.8V? NO YES NO C420=1.5V? Check U401 and C420 YES Check the clock signal NO at pin #3 of OSC101 Check the clock generation circuit (OSC101, F100 pin#4) Freq.
SGH-E720 Flow Chart of Troubleshooting CP_WEN CP_OEN FLASH_RESET ROM1_C S RAM1_C S ONENAND_C S LCDC_C S YMU_C S LOWER_BYTE UPPER_BYTE A(1:24) D(0:15) 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(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) A(21) A(22) A(23) A(24) A(0) SIMCLK SIMDAT A SIMRS T USB_SUSP USB_VPI USB_VM I USB_VPO USB_VM O USB_OE N USB_DAT A UP_SCLK UP_SD O UP_SD I UP_C S DEBUG_RTS
SGH-E720 Flow Chart of Troubleshooting 2-1-2. Initial Initial Failure NO The voltage at the C415=1.8V? The voltage at the C419=2.8V? Check the U401 (If it has some problem, it has to be replaced.) YES NO The voltage at the ZD405 " Low --> High" ? Check the U401 (If it has some problem, it has to be replaced.) YES NO There is 32.768KHz wave form at the C216, C217 ? Check the U201 YES The voltage on R412 is NO "Low --> High" ? Check the U201 YES The voltage is 2.
SGH-E720 Flow Chart of Troubleshooting DSP_DB(0:15) DSP_AB(0:8) DSP_IO DSP_RWN FLASH_RESET DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 AB8 AB7 AB6 AB5 AB4 AB3 AB2 AB1 AB0 I|O RWN RESETN_CSP OCTL0 OCTL1 OCTL2 OCTL3 OCTL4 OCTL5 OCTL6 OCTL7 DSP_DB(15) D2 DSP_DB(14) D3 DSP_DB(13) E3 DSP_DB(12) E2 DSP_DB(11) F3 DSP_DB(10) F2 DSP_DB(9) F1 DSP_DB(8) F4 DSP_DB(7) G4 DSP_DB(6) G3 DSP_DB(5) H5 DSP_DB(4) J6 DSP_DB(3) J5 DSP_DB(2) K3 DSP_DB(1) K2 DSP_DB(0) K1 DSP_AB(8) K5 DSP_AB(7) K7 DSP
SGH-E720 Flow Chart of Troubleshooting 2-1-3. Sim Part "Insert SIM" is displayed on the LCD NO The voltage is 2.
SGH-E720 Flow Chart of Troubleshooting 2-1-4. Microphone Part Micro-phone does not work NO Is the assembled status of Microphone O.K? Reassemble the microphone YES Check the DC bias voltage on Mic path. NO The voltage of C437 is about 2.
SGH-E720 Flow Chart of Troubleshooting R464 C444 C436 17 NC NC 1S2 1-2IN 2S1 D2 16 5 15 14 13 7 U403 6 8 C463 D4 4S1 3S2 3-4IN R421 R422 12 11 10 9 C461 R472 R453 R458 C464 R471 C462 F400 C430 C432 C441 C447 200 LOUT EAR_L AOUTBN EAR_OUT_SEL ROUT AOUTBP EAR_R HPOUT-L HPOUT-R JACK_INT EAR_L EAR_R VCCD_1_8 MIC+ 1UF 1UF C434 C475 C474 D(1) D(0) CP_WEN YMU_CS A(0) CP_OEN MIC- C433 C439 C440 CLK13M_YMU MIC400 YMU_IRQ RST L401 L402 C448 26 G D(5) 3 D(
SGH-E720 Flow Chart of Troubleshooting 2-1-5. Speaker Part There is no sound from speaker NO Is the terminal of speaker O.
SGH-E720 Flow Chart of Troubleshooting 2-1-6. Camera Part Camera function does not work NO Check the connect CN507? Connect the CN507 YES NO Pin #4 of U306 = 1.8V? Check the U306&R376 YES YES Pin #10 of U302 = 2.5V? NO Pin #2 of U302 = High? NO Check U201 YES Pin#3 of OSC300 is 24.5MHz? NO Pin#3 of Q301 = 1.
SGH-E720 Flow Chart of Troubleshooting CP_OEN ROM1_CS ONENAND_CS UPPER_BYT E LOWER_BYT E CP_WEN FLASH_RESET RAM1_CS NAND_INT VCCD_1_8 D(0:15) SUB_L_CS LCD_AD_[00:15] G6 L_DA17 H6 L_DA16 U300 RST C322 D6 F6 H1 K9 G4 E3 R303 2.5V_VCAM VDDI VDDI VDDICD VDDAC UVDDI SVDDI D5 VDDC E5 VDDC F5 VDDC A9 PGND B9 PVDD D4 E4 F4 E6 G5 J1 G1 USB_DP G2 USB_DM GND GND GND GND GND GND R380 C367 C326 SCL SDA P_CLK CAM_RST HOR_REF VER_REF M_CLK HERA_1_8 3 2 C362 2.
SGH-E720 Flow Chart of Troubleshooting 2-1-7. Mp3 Display Part There is no MP3 sound from Earphone YES Are there any signal at the pin #4,6 of CN400? Replace the Earphone NO YES Are there any signal at the pin #8,12 of U403? Check C439,440,474,475,452,448 & L401,402, V400,401 NO YES Are there any signal at the pin #9,13 of U403? Pin #10 of U403 is Low? NO NO Check U201 YES YES Are there any signal at the R350,351? Check R350,351 Pin 14 of U403 is 3.
SGH-E720 Flow Chart of Troubleshooting VBAT CN507 1 3 5 78 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 VCCD LCD_AD(00) LCD_AD(02) LCD_AD(04) LCD_AD(06) LCD_AD(08) LCD_AD(10) LCD_AD(12) LCD_AD(14) LCD_WEN MLCD_CS FLASH_EN1 CAM_DA(0) CAM_DA(1) CAM_DA(2) CAM_DA(3) CAM_DA(4) CAM_DA(5) CAM_DA(6) CAM_DA(7) 1.
SGH-E720 Flow Chart of Troubleshooting 2-2.RF 2-2-1.
SGH-E720 Flow Chart of Troubleshooting 2-2-2.
SGH-E720 Flow Chart of Troubleshooting 2-2-3.
SGH-E720 Flow Chart of Troubleshooting 2-2-4. EGSM TX NO U106 Pin#9 About 2~3 dBm? NO U106 Pin#10 = High? U401 Check & Change YES YES C108,CN100,L103 Check & Change Level of U106 Pin#7 is 4~5dBm ? NO Continuous TX ON condition TX Power Code : 500 code Applied CH : 62 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF. Level : 10dBm ATT. : 20dB YES U106 Check & Change NO C102 = 3.7V? Check the Battery Block YES NO Level of U101 Pin #20 is 1.
SGH-E720 Flow Chart of Troubleshooting 2-2-5. DCS & PCS TX U106 Pin#9 About 2~3 dBm? NO NO U106 Pin#4 = High? YES U401 Check & Change YES C108,CN100,L103 Check & Change Level of U106 Pin#5 is 4~5dBm ? NO Continuous TX ON condition TX Power Code : 500 code Applied CH : 62 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF. Level : 10dBm ATT. : 20dB YES U106 Check & Change C102 = 3.7V? NO Check the Battery Block YES Level of U101 Pin #20 is 1.
SGH-E720 Flow Chart of Troubleshooting GSM_PAM_IN R104 R105 C102 21 20 18 19 17 15 16 U101 VCC1B GSMOUT GND GND GSMIN GND DCS/PCSI N GND VCC1A DCS/PCSOUT BS GND C103 VBAT C104 C122 C123 C105 C106 C146 L106 GSM_PAM_IN DPCS_PAM_IN GSM_LNA_IN_N GSM_LNA_IN_P DCS_LNA_IN_N DCS_LNA_IN_P PCS_LNA_IN_N PCS_LNA_IN_P L117 C114 C145 PCS_RX_EN DCS_TX_EN GSM_TX_EN ANT101 U106 G G DCS G PCS GSM900TX GSM900RX DCS/PCS C112 C110 C101 L103 C147 C149 C151 V102 TP101 DEBUG_CTS DEBUG_RTS DEB
3. SGH-E720 Exploded View and Parts List 3-1.
SGH-E720 Exploded View and Parts List 3-2. Cellular phone Parts list Location Description NO.
SGH-E720 Exploded View and Parts List 3-3. Test Jig (GH80-03307A) 3-3-1. RF Test Cable 3-3-2. Test Cable (GH39-00283A) 3-3-3. Serial Cable (GH39-00304A) 3-3-4. Power Supply Cable 3-3-5. DATA CABLE (GH39-00279A) 3-3-6.
4.
SGH-E720 Main Electrical Parts List SEC Code Design LOC SEC Code Design LOC 1203-003611 U306 2203-000854 C436 1204-002138 U402 2203-000854 C444 1205-002433 U103 2203-000854 C445 1205-002612 U300 2203-000854 C446 1205-002613 U301 2203-000854 C453 1404-001165 TH101 2203-000885 C342 1405-001082 V201 2203-000995 C122 1405-001082 V301 2203-000995 C151 1405-001082 V302 2203-000995 C211 1405-001082 V303 2203-001239 C449 1405-001082 V304 2203-001239 C450 1405-001082
SGH-E720 Main Electrical Parts List SEC Code Design LOC SEC Code Design LOC 2007-000138 R322 2203-005482 C138 2007-000138 R407 2203-005482 C141 2007-000139 R102 2203-005482 C142 2007-000139 R103 2203-005482 C146 2007-000140 R511 2203-005482 C201 2007-000140 R513 2203-005482 C204 2007-000140 R514 2203-005482 C205 2007-000140 R515 2203-005482 C208 2007-000141 R320 2203-005482 C210 2007-000141 R516 2203-005482 C308 2007-000142 R453 2203-005482 C310 2007-000143
SGH-E720 Main Electrical Parts List SEC Code Design LOC SEC Code Design LOC 2007-000164 R423 2203-006053 C357 2007-000164 R429 2203-006053 C406 2007-000170 R318 2203-006053 C414 2007-000170 R377 2203-006053 C415 2007-000170 R378 2203-006053 C416 2007-000171 R114 2203-006053 C417 2007-000171 R115 2203-006053 C418 2007-000171 R376 2203-006053 C419 2007-000171 R473 2203-006053 C420 2007-000172 R124 2203-006053 C430 2007-000242 R109 2203-006053 C432 2007-000242
SGH-E720 Main Electrical Parts List SEC Code Design LOC SEC Code Design LOC 2007-001307 R358 2203-006324 C341 2007-001308 R471 2404-001151 C102 2007-001308 R472 2404-001151 C437 2007-001319 R405 2404-001225 C334 2007-001323 R123 2404-001306 C520 2007-001325 R404 2404-001339 C411 2007-002797 R110 2404-001339 C423 2007-003019 R374 2404-001348 C439 2007-003019 R375 2404-001348 C440 2007-003025 R350 2703-001207 L105 2007-003025 R351 2703-001284 L104 2007-007142
SGH-E720 Main Electrical Parts List SEC Code Design LOC SEC Code Design LOC 2203-000233 C129 3301-001342 F400 2203-000233 C134 3301-001729 F301 2203-000233 C136 3404-001152 SW1 2203-000233 C144 3404-001152 SW2 2203-000233 C421 3404-001152 SW3 2203-000254 C103 3705-001347 CN100 2203-000254 C104 3709-001298 CN401 2203-000254 C106 3710-002194 CN504 2203-000254 C131 3711-005817 CN507 2203-000254 C132 3722-002082 CN400 2203-000254 C133 4202-001037 ANT101 2203-0002
5.
SGH-E720 PCB Diagrams F2 0 0 V4 0 3 ZD40 2 U20 3 V4 0 4 LED31 8 UP DOWN LED 3 1 2 V31 0 V30 8 CLEAR V30 9 2 3 LED 3 1 6 LED 3 1 7 PW R LED30 2 V30 1 1 S TO I LED30 4 SEND V30 6 LED30 1 LED 3 0 8 MENU LEFT LED30 3 RI GHT V30 7 GND1 RST 6 V30 3 5 LED 3 0 9 DS P_RWN LED 3 1 3 4 DSP_TDO DSP_TCK DSP_TMS V30 2 0 LED 3 1 0 9 SHARP V30 4 MI C4 0 0 V30 5 8 LED 3 1 1 * LED 3 1 5 7 LED 3 1 4 DSP_TDI 5-2 SAMSUNG Proprietary-Contents may change without notice T
6. SGH-E720 Block Diagrams SGH-E720 Block Diagram Antenna Antenna V_BAT BTBZ0902 Bluetooth Contractor Antenna Backlight LED SIM_RST SIM_CLK SIM_Data VREF Drivers Backlight Contractor V_BAT RTS, CTS PCM V_BAT MIC 5245 2.8V_BT RX, TX I2C I/F Crystal 32.
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. ⓒ Samsung Electronics Co.,Ltd. MAR. 2005 Printed in Korea. Code No.: GH68-06398A BASIC.
