GSM TELEPHONE SGH-C120 GSM TELEPHONE CONTENTS 1. Specification 2. Flow Chart of Troubleshooting 3. Exploded Views and Parts List 4. Electrical Parts List 5. PCB Diagrams 6.
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. Code No.: GH68-08501A 2005. 11. Rev.1.
1. SGH-C120 Specification 1-1. GSM General Specification GSM900 Phase 1 EGSM 900 Pha se 2 DCS1800 Phase 1 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 A RF C N ra n g e 1 ~ 1 24 0 ~ 1 24 & 9 75 ~ 10 23 51 2~8 85 Tx/Rx spaci ng 45 MHz 45 MHz 95 MHz 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 Tim e Sl ot P eri od /F rame Peri od 576.9us 4. 61 5m s 576.9us 4 .
SGH-C120 Specification 1-2.
2. SGH-C120 Flow Chart of Troubleshooting 2-1.Baseband 2-1-1. 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 U300 Pin#J12 >= 2.8V No Check U300 and C315 ① Yes Pin#A13 and pin#A14 =2.8V No Freq = 13MHz Vrms >=300mV Vpp≒ 900mV No Check U300 and C316 Yes Yes Check the clock signal at pin#8 of U100 pin#G11 = 1.
SGH-C120 Flow Chart of Troubleshooting ② ③ ①② ④ ① 2-2 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SGH-C120 Flow Chart of Troubleshooting DSP_DB(0:15) DSP_AB(0:8) DSP_IO DSP_RWN FLASH_RESET R302 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) C5 F5 D2 D3 E3 E2 F3 F2 F1 F4 G4 G3 H5 J6 J5 K3 K2 K1 K5 K7 M1 M2 N2 N1 L5 P1 K6 L3 L2 R3 OCTL4 OCTL5 OCTL6 OCTL7 OCTL1 OCTL2 DB15 DB14 DB13 DB12 DB11
SGH-C120 Flow Chart of Troubleshooting VRF_2.9V VCCD_2.9V C120 R104 RF_EN C123 7 RTX_IP 6 RTX_IN GND VDD VDD 15 16 RFOH 14 13 RFOL 12 VIO XOUT _RESET 8 13MHZ_BB 11 10 _PDN 9 17 RFIPP BIP 18 RFIPN BIN 19 RFIDP 5 RTX_QP BQP 20 RFIDN 4 RTX_QN BQN 21 U100 RFIEP 3 SERDAT SDIO RFIEN 2 1 _SEN RFIAP SCLK 35 34 33 R105 R106 23 31 30 27 XDIV VDD 28 29 A FC VDD XTA L 2 XEN 32 XTA L 1 RFIAN 24 NC NC GND SERCLK 22 26 XMODE SERLE 25 R107 VRF_2.
SGH-C120 Flow Chart of Troubleshooting 2-1-2. Initial Initial Failure Yes The pin #G11 of U101 = No 1.8V and the pin #J12 of U101 = Check the U300 (if it has some problem, it is to be replaced.) ① Check the U300 (if it has some problem, it is to be replaced.) ① 2.8V ? Yes Is the pin #K9 of U101 No "Low → High" ? Yes There is 32.
SGH-C120 Flow Chart of Troubleshooting ③ ①④ ② 2-6 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SGH-C120 Flow Chart of Troubleshooting VCC_1.8A VCCD_2.9V VRTC_2.9V VCC_1.8A C207 C206 C205 C208 A(22) VCC_1.8A R200 VCCD_2.
SGH-C120 Flow Chart of Troubleshooting 2-1-3. Sim Part "Insert SIM is displayed on the LCD Yes Check the SIM connector's (SIM300) connection to SIM card No Resolder or change SIM300 ① Yes Check the voltage at pin#1 of SIM300 >= 2.
SGH-C120 Flow Chart of Troubleshooting ② ③ ③ ① 2-9 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SGH-C120 Flow Chart of Troubleshooting 2-1-4. 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 VR401 ≒ 2.
SGH-C120 Flow Chart of Troubleshooting ① ② 2-11 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SGH-C120 Flow Chart of Troubleshooting 2-1-5. 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#A11 and pin#N12 of U300 ? No Check U300,R423,R424 ① Yes END 2-1-6. Buzzer Part There is no sound from the Buzzer Yes Is the terminal of Buzzer O.
SGH-C120 Flow Chart of Troubleshooting ① ② ①② 2-13 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SGH-C120 Flow Chart of Troubleshooting MICINP MICOUTP MICINN MICOUTN AUXOUTN AUXINN AUXINP AUXOUTP R400 R404 R411 R414 VIB_EN R425 R401 R403 R413 C404 C401 C408 C410 C413 C415 U400 C403 R402 C407 3 D400 2 R405 R410 1 R422 R421 VCCA_2.9V C420 C423 VBAT R408 TA400 R407 VCCA_2.9V VBAT 3 2 VDD 1 NC VOUT GND GND 6 CE 5 4 L400 L401 2 C421 R427 C402 R406 R409 3 1 C405 C400 C406 C409 MOT+ R426 R420 VCCD_2.
SGH-C120 Flow Chart of Troubleshooting 2-2.RF CONTINUOUS RX ON RF INPUT : 62CH 2-2-1. EGSM RX AMP : -50dBm NO NORMAL CONDITION catch the channel? CHECK ANT contact ? ① YES ② NO F101 CHECK pin8 ≥ -65dBm ? F101,RFS100 resolder or change ③ YES NO F101 CHECK pin10 ≥ -65dBm ? F101 resolder or change YES NO F100 CHECK pin6,7 ≥ -65dBm ? F100 resolder or change YES ④ NO U100 CHECK pin21,22 ≥ -65dBm ? C127,C129,L107 resolder or change ⑤ YES NO U100 pin 12,13,25,26,27: 2.
SGH-C120 Flow Chart of Troubleshooting ③ ② ③ ⑥ ④ ⑥⑧ ⑤ ⑦ 2-16 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SGH-C120 Flow Chart of Troubleshooting 2-2-2.
SGH-C120 Flow Chart of Troubleshooting ③ ② ③ ⑤ ④ ⑥ ⑦ 2-18 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SGH-C120 Flow Chart of Troubleshooting 2-2-3. EGSM TX F101 pin 5 : about 2~3 dBm? ① NO NO F101 pin11 : 2.8 V? U300 check & change CONTINOUS TX ON CONDITION TX POWER DAC: 600 CODE APPLIED CH : 62 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF LEV. : 10dBm ATT. : 20dB ② YES YES ③ C103,RFS100 check&change NO PAM100 pin10 : about 4~5dBm? ④ YES F101 check & change PAM100 pin4 : 3.7 V? NO BATTERY check & change YES PAM100 pin 6 : 1.
SGH-C120 Flow Chart of Troubleshooting ③ ① ⑥ ⑤ ② ⑥ ④ ⑦ 2-20 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SGH-C120 Flow Chart of Troubleshooting 2-2-4. DCS TX F101 pin 11 : about 2~3 dBm? ① NO NO F101 pin2 : 2.8 V? U300 check & change ② YES YES ③ C103,RFS100 check&change NO PAM100 pin16 : about 4~5dBm? CONTINUOUS TX ON CONDITION CH : 698CH(DCS) TX POWER CODE: 520 CODE Aplied RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF LEV. : 10dBm ATT. : 20dB ④ YES F101 check & change PAM100 pin4 : 3.7 V? NO BATTERY check & change YES PAM100 pin 6 : 1.
SGH-C120 Flow Chart of Troubleshooting ③ ① ⑤ ②⑥ ④ ⑦ 2-22 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SGH-C120 Flow Chart of Troubleshooting R100 C104 14 16 26 25 18 PAM100 19 17 G 11 12 13 14 VCC2 G G 16 1 DCS/PCS_IN DCS/PCS_OUT 15 G BS G 9 C116 C117 VRF_2.
3. SGH-C120 Exploded View and Parts List 3-1.
SGH-C120 Exploded View and Parts List 3-2.
SGH-C120 Exploded View and Parts List Description Sec Code BAG PE 6902-000297 CHARGER-SGHN288 TA(U.
SGH-C120 Exploded View and Parts List 3-3. Test Jig (GH80-00865A) 3-3-1. RF Test Cable 3-3-2. Test Cable (GH39-00397A) 3-3-3. Serial Cable (GH39-00127A) 3-3-4. Power Supply Cable 3-3-5. DATA CABLE (GH39-00159A) 3-3-6.
4.
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 1203-003936 U500 IC-DC/DC CONVERTER SA 1205-002683 U100 IC-TRANSCEIVER SA 1404-001221 TH200 THERMISTOR-NTC SA 1405-001082 VR405 VARISTOR SA 1405-001082 VR410 VARISTOR SA 1405-001082 VR411 VARISTOR SA 1405-001082 VR500 VARISTOR SA 1405-001082 VR501 VARISTOR SA 1405-001082 VR502 VARISTOR SA 1405-001082 VR503 VARISTOR SA 1405-001082 VR504 VARISTOR SA 1405-001082 VR602 VARISTOR SA 1405-001082 VR60
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 1405-001108 VR612 VARISTOR SA 2007-000140 R208 R-CHIP SA 2007-000140 R417 R-CHIP SA 2007-000140 R420 R-CHIP SA 2007-000140 R426 R-CHIP SA 2007-000140 R515 R-CHIP SA 2007-000140 R516 R-CHIP SA 2007-000140 R517 R-CHIP SA 2007-000140 R518 R-CHIP SA 2007-000140 R519 R-CHIP SA 2007-000140 R520 R-CHIP SA 2007-000140 R521 R-CHIP SA 2007-000140 R522 R-CHIP SA 2007-000140 R523 R-CHIP SA 2007-0001
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 2007-000157 R204 R-CHIP SA 2007-000157 R306 R-CHIP SA 2007-000162 R209 R-CHIP SA 2007-000162 R213 R-CHIP SA 2007-000162 R529 R-CHIP SA 2007-000167 R304 R-CHIP SA 2007-000171 R100 R-CHIP SA 2007-000171 R108 R-CHIP SA 2007-000171 R110 R-CHIP SA 2007-000171 R205 R-CHIP SA 2007-000171 R206 R-CHIP SA 2007-000171 R210 R-CHIP SA 2007-000171 R219 R-CHIP SA 2007-000171 R300 R-CHIP SA 2007-000171
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 2007-000171 R502 R-CHIP SA 2007-000171 R507 R-CHIP SA 2007-000171 R526 R-CHIP SA 2007-000171 R611 R-CHIP SA 2007-000171 R612 R-CHIP SA 2007-000172 R201 R-CHIP SA 2007-000172 R302 R-CHIP SA 2007-000172 R613 R-CHIP SA 2007-000173 R412 R-CHIP SA 2007-000173 R415 R-CHIP SA 2007-000566 R510 R-CHIP SA 2007-000566 R511 R-CHIP SA 2007-000566 R512 R-CHIP SA 2007-000566 R513 R-CHIP SA 2007-000566
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 2007-002797 R104 R-CHIP SA 2007-002797 R109 R-CHIP SA 2007-002965 R614 R-CHIP SA 2007-002965 R615 R-CHIP SA 2007-003015 R218 R-CHIP SA 2007-007142 R301 R-CHIP SA 2007-007142 R309 R-CHIP SA 2007-007142 R401 R-CHIP SA 2007-007142 R403 R-CHIP SA 2007-007142 R413 R-CHIP SA 2007-007197 R423 R-CHIP SA 2007-007197 R424 R-CHIP SA 2007-007308 R212 R-CHIP SA 2007-007308 R214 R-CHIP SA 2007-007480
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 2203-000233 C324 C-CER,CHIP SA 2203-000233 C410 C-CER,CHIP SA 2203-000254 C117 C-CER,CHIP SA 2203-000254 C200 C-CER,CHIP SA 2203-000254 C201 C-CER,CHIP SA 2203-000254 C202 C-CER,CHIP SA 2203-000254 C203 C-CER,CHIP SA 2203-000254 C208 C-CER,CHIP SA 2203-000254 C209 C-CER,CHIP SA 2203-000254 C210 C-CER,CHIP SA 2203-000254 C211 C-CER,CHIP SA 2203-000254 C212 C-CER,CHIP SA 2203-000254 C214 C-CER,
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 2203-000438 C115 C-CER,CHIP SA 2203-000530 C113 C-CER,CHIP SA 2203-000628 C405 C-CER,CHIP SA 2203-000679 C207 C-CER,CHIP SA 2203-000679 C419 C-CER,CHIP SA 2203-000696 C102 C-CER,CHIP SA 2203-000696 C127 C-CER,CHIP SA 2203-000696 C129 C-CER,CHIP SA 2203-000812 C304 C-CER,CHIP SA 2203-000812 C305 C-CER,CHIP SA 2203-000812 C306 C-CER,CHIP SA 2203-000812 C310 C-CER,CHIP SA 2203-000812 C400 C-CER,
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 2203-001072 C417 C-CER,CHIP SA 2203-001072 C418 C-CER,CHIP SA 2203-001385 C111 C-CER,CHIP SA 2203-001405 C206 C-CER,CHIP SA 2203-001412 C132 C-CER,CHIP SA 2203-001598 C308 C-CER,CHIP SA 2203-001598 C311 C-CER,CHIP SA 2203-005061 C205 C-CER,CHIP SA 2203-005061 C307 C-CER,CHIP SA 2203-005061 C318 C-CER,CHIP SA 2203-005061 C319 C-CER,CHIP SA 2203-005061 C422 C-CER,CHIP SA 2203-005061 C600 C-CER,
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 2203-006141 C312 C-CER,CHIP SA 2203-006141 C313 C-CER,CHIP SA 2203-006141 C314 C-CER,CHIP SA 2203-006141 C315 C-CER,CHIP SA 2203-006141 C316 C-CER,CHIP SA 2203-006141 C322 C-CER,CHIP SA 2203-006141 C325 C-CER,CHIP SA 2203-006141 C421 C-CER,CHIP SA 2203-006257 C323 C-CER,CHIP SA 2203-006260 C204 C-CER,CHIP SA 2203-006260 C213 C-CER,CHIP SA 2203-006260 C403 C-CER,CHIP SA 2203-006260 C407 C-CER,
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 2404-001225 TA402 C-TA,CHIP SA 2404-001412 TA100 C-TA,CHIP SA 2503-001053 C550 C-NETWORK SA 2503-001053 C552 C-NETWORK SA 2503-001053 C553 C-NETWORK SA 2503-001053 C554 C-NETWORK SA 2703-001178 L103 INDUCTOR-SMD SA 2703-001178 L109 INDUCTOR-SMD SA 2703-002170 L108 INDUCTOR-SMD SA 2703-002199 L106 INDUCTOR-SMD SA 2703-002202 L400 INDUCTOR-SMD SA 2703-002202 L401 INDUCTOR-SMD SA 2703-002208 L102
SGH-C120 Main Electrical Parts List SEC Code Design LOC Discription STATUS 3709-001298 SIM300 CONNECTOR-CARD EDGE SA 3710-001611 IFC500 CONNECTOR-INTERFACE SA 3711-005901 BTC500 CONNECTOR-BATTERY SA 3722-002067 EAR400 JACK-EAR PHONE SA 4302-001130 BAT300 BATTERY-LI(2ND) SA GH09-00039A UCP200 IC MICOM SA 4-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
5.
SGH-C120 PCB Diagrams CN400 MOD500 G1 ZD602 INT G2 LED612 VR606 F2 LEFT F1 DOWN PWR VR607 SEN D VR605 UP RIGHT LED611 ZD603 ZD604 CLEAR VR601 VR602 VR608 1 3 2 VR609 4 6 5 VR604VR603 VR611VR612 7 9 8 * SH VR610 0 5-0 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
6. SGH-C120 Block Diagrams 6-1.
SGH-C120 Block Diagrams 6-2.
