SAMSUNG X120 free download

File name SAMSUNG SGH-X120 service manual.pdf

GSM TELEPHONE SGH-X120 GSM TELEPHONE 1. 2. 3. 4. 5. 6. CONTENTS Specification Flow Chart of Troubleshooting Exploded Views and Parts Lis Electrical Parts List Block Diagram PCB Diagrams 1. SGH-X120 Specification 1. GSM General Specification GSM900 Phase 1 F r e q . Ba n d [ M H z ] U plin k/D o wn link A RF C N r an g e Tx / Rx s pac in g M od . Bit r a te / Bit P e r io d Ti me S lo t P e ri od / Fr am e P e ri od M o du l ati on M S P o we r P o we r C las s Sensitivity T DM A M u x Ce l l Rad iu s 8 90~ 915 9 35~ 960 1~1 24 4 5M Hz 2 70. 833 kb ps 3. 69 2us 57 6. 9us 4. 615 ms 0 .3 GM S K 33 dBm ~ 13d Bm 5p cl ~ 1 9pc l -10 2dB m 8 35Km EGSM 900 Phase 2 880 ~9 15 925 ~9 60 0~ 12 4 & 975~ 102 3 45MHz 27 0. 833k bp s 3. 692u s 576. 9u s 4. 615m s 0 . 3 G M SK 33d Bm ~5d Bm 5pcl ~ 19pcl -102 dBm 8 35K m DCS1800 Phase 1 171 0~1 785 180 5~1 880 51 2~8 85 95 MHz 27 0. 833k bp s 3. 692 us 5 7 6 .9 u s 4. 615m s 0 . 3 G M SK 30d Bm ~0 dBm 0pcl ~ 15pcl -100 dBm 8 2Km 1-1 SAM SU N G Pr i ar C ont s m ay change w ihoutnotce opret yent t i This Document can not be used without Samsung's authorization SGH-X120 Specification 2. GSM TX power class TX Power control level 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 GSM900 33±2 dBm 31±2 dBm 29±2 dBm 27±2 dBm 25±2 dBm 23±2 dBm 21±2 dBm 19±2 dBm 17±2 dBm 15±2 dBm 13±2 dBm 11±3 dBm 9±3dBm 7±3 dBm 5±3 dBm TX Power control level 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 DCS1800 30±3 dBm 28±3 dBm 26±3 dBm 24±3 dBm 22±3 dBm 20±3 dBm 18±3 dBm 16±3 dBm 14±3 dBm 12±4 dBm 10±4 dBm 8±4dBm 6±4 dBm 4±4 dBm 2±5 dBm 0±5 dBm 1-2 SAM SU N G Pr i ar C ont s m ay change w ihoutnotce opret yent t i This Document can not be used without Samsung's authorization 2. SGH-X120 Flow Chart of Troubleshooting 1. Power ON 'Power ON' Does not work Check the current consumption Current consumption 100mA ? YES Check the V bat. voltage NO Down load again Voltage 3.3V ? YES Check the pin of U300 NO Charge the Battery pin #11 2.8V ? YES pin #39 and #33 = 2.8V YES NO Check U300 and C313 NO Pin #9=1.8V? YES NO Check U300 and C312 Check the clock signal at pin #3 of OSC100 Freq.=13MHz,Vrms 300mV NO Check the clock generation circuit (OSC100, U105 pin#4) YES Check the Initial operation END 2-1 SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 2. System Initial Initial Failure The pin #9 of U300 = 1.8V and pin #11 of U300=2.8V? YES Is the pin #19 of U300 " Low --> High" ? YES There is 32.768KHz wave form at the C225, C226 ? YES NO Check the U300 (If it has some problem, it has to be replaced.) NO Check the U300 (If it has some problem, it has to be replaced.) NO Check the U201 Is the pin #25 of U300 is High ? YES The voltage is "High" at the C306,C308,C309 ? YES LCD Display OK ? YES Sound operation OK ? YES END NO Check the U200 NO Check the U300 NO Check the LCD part NO Check the Audio part 2-2 SAM SU N G Pr i ar C ont s m ay change w ihoutnotce opret yent t i This Document can not be used w