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Samsung SGH-A300, Service Manual

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Samsung SGH-A300 Service Manual Download Page 41

SAMSUNG Proprietary-Contents may change without notice

5-14

Flow Chart of Troubleshooting and Circuit Diagram

5-14 SGH-A300 DCS Transmit

Tx On (level : 0)

Battery voltage : 3.8 V

N

Y

Y

U505
Pin 9

≥

25 dBm

Resolder

CN500

LAM1

Pin 1

≥

25 dBm

Resolder or Change

LAM1

Y

Y

Y

Change

U510

END

Y

N

Y

Change OSC300

N

N

N

U510
pin 2

≥

0 dBm

Y

Resolder or Change

U505

Y

N

U505

Pin 11

≥

25 dBm

N

N

Resolder or Change

U503, Q501

Y

Resolder or Change

U512

Y

Change U300

N

Change

U508

Check voltage

Pin 2  : L

Pin 4  : H

Pin 8  : L

Pin 10 : H

U513

Pin 9 : L

Pin 7 : H

U513 pin 3

1~2.3V ?

Check

OSC300 pin1

≥

-10 dBm

Check

U510 pin14 

1V ~ 2V ?

Change U513

Summary of Contents for SGH-A300

Page 1: ...UAL BAND GSM TELEPHONE SGH A300 Manual DUAL BAND GSM TELEPHONE CONTENTS 1 Exploded Views and Parts List 2 Electrical Parts List 3 Block Diagrams 4 PCB Diagrams 5 Flow Chart of Troubleshooting and Circuit Diagram ...

Page 2: ...t 1 7 SGH A300 Test Jig 1 7 1 SGH A300 Test Jig Cable 1 7 2 SGH A300 RF Jig Cable 1 7 3 SGH A300 Test Jig 2 Electrical Parts List 3 Block Diagrams 3 1 Main Block Diagram 3 2 Main RF 3 2 1 RF Tx Part 3 2 2 RF Rx Part 4 PCB Diagrams 4 1 Main Top 4 2 Main Bottom 5 Flow chart of trouble shooting 5 1 Power ON 5 2 Initial 5 3 Sim Part 5 4 Charging Part 5 5 Microphone Part 5 6 Speaker Part 5 7 Key Data I...

Page 3: ...out notice 1 2 1 Exploded View and its Parts List 1 1 SGH A300 GSM Telephone Exploded View 1 2 1 2 2 2 3 2 3 6 5 8 4 7 1 7 3 7 2 7 4 7 7 5 9 10 19 11 26 25 24 12 1 12 2 12 3 12 4 12 5 12 13 14 16 21 23 15 17 18 20 22 24 2 24 3 24 1 24 4 24 5 24 6 ...

Page 4: ...GH59 00189A GH31 00018A 3001 001215 GH07 00072A GH75 01016A GH74 00939A GH75 01087A GH74 00953A GH72 02317A GH74 01244A 6001 000464 GH68 00370C GH72 02385A GH75 01001A GH72 02420A GH72 00287A GH72 02135A GH73 00263B GH74 01243A GH72 01572A GH72 01582F 3003 001060 GH71 00459A GH59 00188A GH73 00676A GH73 00756A GH73 00653A GH92 00872A GH42 00100A GH73 00611A GH75 01002A GH71 00392A GH72 01574C GH72...

Page 5: ...e without notice 1 4 Exploded view and its Part List 1 3 SGH A300 Travel Adapter 1 4 SGH A300 Travel Adapter Parts List TYPE SEC CODE REMARK A GH44 00171A CHINA B GH44 00184A EUROPE C GH44 00171C UNITED KINGDOM D Gh44 00171E TAIWAN A B C D ...

Page 6: ...s may change without notice 1 5 Exploded view and its Part List 1 5 SGH A300 Cigarette Lighter Adaptor 1 6 SGH A300 Cigarette Lighter Adapter Parts List DESCRIPTION SEC CODE REMARK Cigarette Lighter Adapter Code GH44 00195A BLACK ...

Page 7: ...MSUNG Proprietary Contents may change without notice 1 6 Exploded view and its Part List 1 7 SGH A300 Test Jig GH80 00161A 1 7 1 SGH A300 Test Jig Cable GH39 00096A 1 7 2 SGH A300 RF Jig Cable GH39 00026A ...

Page 8: ...prietary Contents may change without notice 1 7 Exploded view and its Part List 1 7 3 SGH A300 Test Jig 8922 or 8960 WIRELESS COMMUNICATIONS TEST SET TEST JIG DC POWER SUPPLY RF JIG CABLE TEST JIG CABLE 232 CABLE ...

Page 9: ...7 2203 005061 C114 100 nF 80 20 16 V Y5 V TP 1005 18 2203 001432 C115 47 nF 80 20 16 V Y5 V TP 1005 19 2203 000628 C116 0 022 nF 5 50 V NP0 TP 1005 20 2203 000812 C117 0 033 nF 5 50 V NP0 TP 1005 21 2203 005571 C118 10000 nF 80 20 6 3 V Y5 V TP 2012 22 2203 005061 C119 100 nF 80 20 16 V Y5 V TP 1005 23 2203 005061 C120 100 nF 80 20 16 V Y5 V TP 1005 24 2203 001432 C121 47 nF 80 20 16 V Y5 V TP 100...

Page 10: ...3 000628 C310 0 022 nF 5 50 V NP0 TP 1005 51 2203 000628 C311 0 022 nF 5 50 V NP0 TP 1005 52 2301 001230 C312 10 nF 5 16 V TP 2012 53 2404 001105 C313 10UF 20 6 3 V GP TP 2012 54 2203 000940 C314 470 pF 10 50 V X7R TP 1005 55 2203 000812 C315 0 033 nF 5 50 V NP0 TP 1005 56 2203 000254 C316 10 nF 10 16 V X7R TP 1005 57 2203 000254 C317 10 nF 10 16 V X7R TP 1005 58 2203 000836 C318 390 pF 10 50 V X7...

Page 11: ... V X7R TP 1005 83 2203 000254 C345 10 nF 10 16 V X7R TP 1005 84 2203 000254 C346 10 nF 10 16 V X7R TP 1005 85 2203 000233 C401 0 1 nF 5 50 V NP0 TP 1005 86 2203 005061 C402 100 nF 80 20 16 V Y5 V TP 1005 87 2203 005065 C403 1000 nF 80 20 10 V Y5 V TP 1608 88 2203 005065 C404 1000 nF 80 20 10 V Y5 V TP 1608 89 2203 005664 C405 4700 nF 10 6 3 V X5R TP 2012 90 2203 005664 C406 4700 nF 10 6 3 V X5R TP...

Page 12: ... NP0 TP 1005 115 2203 000628 C512 0 022 nF 5 50 V NP0 TP 1005 116 2203 000628 C513 0 022 nF 5 50 V NP0 TP 1005 117 2203 001385 C514 0 0015 nF 0 25 pF 50 V NP0 TP 1005 118 2203 000278 C515 0 01 nF 0 5 pF 50 V NP0 TP 1005 119 2203 000628 C516 0 022 nF 5 50 V NP0 TP 1005 120 2203 000628 C517 0 022 nF 5 50 V NP0 TP 1005 121 2203 000812 C518 0 033 nF 5 50 V NP0 TP 1005 122 2203 000812 C519 0 033 nF 5 5...

Page 13: ... 5 pF 50 V NP0 TP 1005 147 2203 001432 C548 47 nF 80 20 16 V Y5 V TP 1005 148 2203 005065 C549 1000 nF 80 20 10 V Y5 V TP 1608 149 2203 000812 C600 0 033 nF 5 50 V NP0 TP 1005 150 2203 000628 C601 0 022 nF 5 50 V NP0 TP 1005 151 2404 001151 C602 33UF 20 6 3 V LZ TP 3216 152 2203 000438 C604 1 nF 10 50 V X7R TP 1005 153 2203 000628 C605 0 022 nF 5 50 V NP0 TP 1005 154 2203 005367 C606 6800 nF 80 20...

Page 14: ... 0 033 nF 5 50 V NP0 TP 1005 179 2203 000812 C640 0 033 nF 5 50 V NP0 TP 1005 180 2203 000812 C641 0 033 nF 5 50 V NP0 TP 1005 181 2203 000812 C642 0 033 nF 5 50 V NP0 TP 1005 182 2203 000812 C643 0 033 nF 5 50 V NP0 TP 1005 183 2203 000812 C644 0 033 nF 5 50 V NP0 TP 1005 184 2203 000812 C647 0 033 nF 5 50 V NP0 TP 1005 185 2203 005065 C651 1000 nF 80 20 10 V Y5 V TP 1608 186 2203 000359 C652 0 1...

Page 15: ... nH 5 1 8 x 1 12 x 1 02 mm 211 2703 002214 L302 8 2 nH 5 1 6 x 0 8 x 0 8 mm 212 2703 001513 L303 100 nH 5 1 8 x 1 12 x 1 02 mm 213 2703 001545 L304 47 nH 5 1 8 x 1 12 x 1 02 mm 214 2703 001543 L305 33 nH 5 1 8 x 1 12 x 1 02 mm 215 2703 001547 L306 10 nH 5 1 8 x 1 12 x 1 02 mm 216 2703 001547 L307 10 nH 5 1 8 x 1 12 x 1 02 mm 217 2703 001547 L308 10 nH 5 1 8 x 1 12 x 1 02 mm 218 2703 002218 L400 10...

Page 16: ...4 001012 Q501 DTC114YE NPN 150 mW 10K 47K EMT3 TP 243 0504 000168 Q600 RN1104 NPN 100 mW 47K 47K SSM TP 244 0501 002346 Q601 2SB1427 PNP 500 mW SOT 89 TP 390 820 245 0501 002356 Q603 NPN 250 mW SOT 323 TP 250 630 246 0506 001052 Q604 UMH9N NPN 2 150 mW SC 88 TP 68 247 0504 001012 Q605 DTC114YE NPN 150 mW 10K 47K EMT3 TP 248 2007 000140 R100 1 kohm 5 1 16 W DA TP 1005 249 2007 000140 R101 1 kohm 5 ...

Page 17: ...275 2007 007771 R280 0 ohm 5 1 16 W DA TP 1005 276 2007 000932 R281 470 ohm 5 1 16 W DA TP 1005 277 2007 001288 R300 18 ohm 5 1 16 W DA TP 1005 278 2007 001288 R301 18 ohm 5 1 16 W DA TP 1005 279 2007 001323 R302 3 kohm 5 1 16 W DA TP 1005 280 2007 000172 R303 10 ohm 5 1 16 W DA TP 1005 281 2007 000172 R304 10 ohm 5 1 16 W DA TP 1005 282 2007 001288 R305 18 ohm 5 1 16 W DA TP 1005 283 2007 001323 ...

Page 18: ...1 0 ohm 5 1 16 W DA TP 1608 307 2007 000140 R502 1 kohm 5 1 16 W DA TP 1005 308 2007 000148 R503 10 kohm 5 1 16 W DA TP 1005 309 2007 000148 R505 10 kohm 5 1 16 W DA TP 1005 310 2007 001298 R506 51 ohm 5 1 16 W DA TP 1005 311 2007 007193 R507 5 1 ohm 5 1 16 W DA TP 1005 312 2007 001298 R508 51 ohm 5 1 16 W DA TP 1005 313 2007 007193 R509 5 1 ohm 5 1 16 W DA TP 1005 314 2007 000148 R510 10 kohm 5 1...

Page 19: ...DA TP 1005 339 2007 000142 R605 2 7 kohm 5 1 16 W DA TP 1005 340 2007 000165 R607 200 kohm 5 1 16 W DA TP 1005 341 2007 000162 R609 100 kohm 5 1 16 W DA TP 1005 342 2007 000148 R610 10 kohm 5 1 16 W DA TP 1005 343 2007 000142 R611 2 7 kohm 5 1 16 W DA TP 1005 344 2007 000162 R612 100 kohm 5 1 16 W DA TP 1005 345 2007 000140 R613 1 kohm 5 1 16 W DA TP 1005 346 2007 000140 R616 1 kohm 5 1 16 W DA TP...

Page 20: ...5P 64MIL 371 0504 001042 U500 BCR10PN NPN PNP 250 mW 10K 10K 372 0504 001042 U501 BCR10PN NPN PNP 250 mW 10K 10K 373 0504 001042 U502 BCR10PN NPN PNP 250 mW 10K 10K 374 0504 001012 U503 DTC114YE NPN 150 mW 10K 47K EMT3 TP 375 2909 001084 U505 942 5 MHZ 897 5 MHZ 1 1 2DB TP 376 2007 000137 U506 2 kohm 5 1 16 W DA TP 1005 377 1201 001697 U507 RF210 51 TSSOP 20P 173MIL 378 1201 001753 U508 MSOP TP 8P...

Page 21: ...17 5 6 V 20A 1 x 0 5 x 0 6 mm TP 399 1405 001082 V618 5 6 V 20A 1 x 0 5 x 0 6 mm TP 400 1405 001082 V619 5 6 V 20A 1 x 0 5 x 0 6 mm TP 401 1405 001082 V620 5 6 V 20A 1 x 0 5 x 0 6 mm TP 402 1405 001082 V621 5 6 V 20A 1 x 0 5 x 0 6 mm TP 403 1405 001082 V622 5 6 V 20A 1 x 0 5 x 0 6 mm TP 404 0404 001044 ZD400 UPS5817 20 V 1A SMD TP 405 0404 000108 ZD401 RB705D 20 V 30 mA SOT 23 TP 406 0404 000108 Z...

Page 22: ...SAMSUNG Proprietary Contents may change without notice 3 1 3 SGH A300 Block Diagrams 3 1 SGH A300 Main Block Diagram ...

Page 23: ...SAMSUNG Proprietary Contents may change without notice 3 2 Block Diagrams 3 2 SGH A300 Main RF Block Diagram ...

Page 24: ...SAMSUNG Proprietary Contents may change without notice 3 3 Block Diagrams 3 2 1 SGH A300 RF Receive Part Block Diagram ...

Page 25: ...SAMSUNG Proprietary Contents may change without notice 3 4 Block Diagrams 3 2 2 SGH A300 RF Transmit Part Block Diagram ...

Page 26: ...SAMSUNG Proprietary Contents may change without notice 4 1 4 SGH A300 PCB Diagrams 4 1 SGH A300 Main PCB Top Diagram ...

Page 27: ...SAMSUNG Proprietary Contents may change without notice 4 2 PCB diagrams 4 2 SGH A300 Main PCB Bottom Diagram ...

Page 28: ...onsumption more than 100 mA Download again N Y Check the Battery Voltage more than 3 3V Charge the Battery N Y Check the pin 38 of U400 is more than 3 2 V Check to the path from CN604 to pin 38 of U400 and keypad N Y U400 pin 33 28 30 2 8V Change U400 N Y END Y Check the clock signal at R105 Check the clock generation circuit related to U400 and OSC100 Check the initial operation ...

Page 29: ... pin 10 of U400 is High Check the U201 M46 N Y Check the pin 11 of U400 is High Check the U400 PMIC Y Check the connections and initialization using Factory Test Program END Y Check LCD connector CN601 and resolder bridge SAMSUNG Proprietary Contents may change without notice 5 2 Flow Chart of Troubleshooting and Circuit Diagram ...

Page 30: ...CD VTIC VSIM VSW1 24 25 VSW2 VCCD ISENP 100K R404 ZD402 R407 4 7K VBAT 10 G ISENN VCCD R409 3 2 1 VSIM U8016 1 4 1 2 8 7 4 7K VOUT_1A 30 VOUT_2 VOUT_3 28 31 VOUT_4A VOUT_4B 32 29 VOUT_5 VOUT_6 27 43 VOUT_7 VOUT_8 48 VREF_CAP 44 VSUB_P 20 17 18 SIM_CLK_M46 SIM_DATA_CARD 15 SIM_DATA_M46 16 14 SIM_ENABLE 21 SIM_RST_CARD SIM_RST_M46 22 VBAT1 37 38 VBAT2 VBOOST 39 VOUT1B 34 33 35 NC1 NC2 36 NC3 4 NC4 2...

Page 31: ...k the U201 using Factory Test Program N Y Check the pin 5 6 of U8021 is more than 0 5V Resolder R648 R651 R646 N Y Check the Voltage of pin 5 of U605 is between 3 2 V and 4 2 V Change U605 END 5 4 SGH A300 Charging Part TA_PRES TA_PRES 0 L602 PROG 3 VCC 5 VSENSE R651 R634 Vext Charger_Disable Ta_Det 1 2 3 Vbat 3 1 U8021 2 5 6 3 1 Q601 R646 10UF 10V 0 22K 4 R637 3 3K 1 C635 Q605 2 U605 DRIVE 6 GND ...

Page 32: ... Mic C113 Mic Mic_Bias 22PF 1 1K R103 330 C108 33UF R104 C111 22PF C116 C115 47NF C112 47NF 1 1K R107 33PF 5 5 SGH A300 Microphone Part Micro Phone does not work Y N Y check the connection from MIC600 Change MIC600 N Y Audio loopback is enabled by board test program R104 R107 2 2 V Resolder R104 R107 R103 END ...

Page 33: ...s not work Y Y N Y Check the connection from CN601 to LCD Module Replace Flexible PCB N Y Check the voltage on the speaker line lands on LCD Module Change the LCD Module N Y Is Speaker working Replace the Speaker or resolder Speaker END 5 6 SGH A300 Speaker Part Check the connection between CN601 and LCD Module connector ...

Page 34: ...shooting and Circuit Diagram 5 7 SGH A300 Key Data Input Check initial operation Y Y N Y Check the pin 1 3 4 of CN602 is High Check the M46 U201 N Y When one of the keys is pushed one of pin 5 12 of CN602 is High Replace the key PCB END Check the connection between CN602 and Keypad ...

Page 35: ...agram 5 8 SGH A300 Ring Indicator Ring Indicator does not work Y Y N Y Check the Q203 pin 2 is High Check M46 U201 by Factory Test Program N Y Check the Q203 pin 3 is Low Replace Q203 N Y CN602 pin 14 L Resolder CN602 N Y Key PCB is OK Replace the key PCB END Check the connection between CN602 and Keypad ...

Page 36: ...8 33PF Kbd_Rtn2 Kbd_Rtn0 Flip_Sns 11 CN602 1 1 10 10 11 R609 Red_Led_En Green_Led_En Kbd_Strb3 Kbd_Strb4 Kbd_Strb7 Kbd_Strb2 Kbd_Strb0 Kbd_Rtn1 Kbd_Strb6 Kbd_Strb1 Kbd_Strb5 33PF C609 KEY_PAD_CTL SLCD_CS MLCD_CS Reset_B Mtr_En Speaker Spkr LED_CTL 2 3 1 4 5 5 6 6 7 7 8 8 9 9 R220 330 Green_Led_En Red_Led_En Q203 2 3 1 330 R219 1 2 3 4 5 6 V620 ZD603 1 2 3 4 5 6 U201 M46 G11 C14 Red_Led Green_Led C...

Page 37: ...ave signal on the Q603 pin3 during alert tone test Check the circuit related to Q603 N Y Check the C620 3 3V Resolder D601 and C620 N Y Buzzer is ok Change the Buzzer END SAMSUNG Proprietary Contents may change without notice 5 10 Flow Chart of Troubleshooting and Circuit Diagram Buzzer_En 22PF C625 AU600 C620 22PF Q603 1 3 2 R635 150 VBat D601 3 1 2 ...

Page 38: ...501 pin 5 65 dBm Resolder F501 N Y F300 pin 4 65 dBm Change F300 N Y U300 pin 26 27 55 dBm Change U300 N Y U505 Pin 5 65 dBm N Y Resolder U505 Pin 5 65 dBm Check voltage U505 pins Pin 2 L Pin 4 H Pin 8 H Pin 10 L N Y U507 pin 16 17 50 dBm Y Check OSC300 pin 1 10 dBm Change OSC300 Change U507 Y Change U300 END N N Y F301 pin 1 2 5 6 55 dBm Change F301 N Y F300 pin 1 60 dBm Check D300 pin 1 1V 2 3V ...

Page 39: ...solder CN500 LAM1 Pin 3 30 dBm Resolder or Change LAM1 Y Y Y Change U510 END Y N Y Change OSC300 N N N U510 pin 4 0 dBm Y Resolder or Change U505 Y N U505 Pin 1 30 dBm N N Resolder or Change U503 Q501 Y Resolder or Change U512 Y Change U300 N Change U508 Check voltage Pin 2 H Pin 4 L Pin 8 H Pin 10 L U513 Pin 9 H Pin 7 L U513 pin 3 1 2 3V Check OSC300 pin1 10 dBm Check U510 pin14 1V 2V Change U513...

Page 40: ...00 Y F500 pin 5 65 dBm Resolder F500 N Y F300 pin 4 65 dBm Change F300 N Y U300 pin 26 27 55 dBm Change U300 N Y U505 Pin 7 65 dBm N Y Resolder U505 Pin 7 65 dBm Check voltage U505 pins Pin 2 L Pin 4 H Pin 8 H Pin 10 L N Y U507 pin 16 17 50 dBm Y Check OSC300 pin 1 10 dBm Change OSC300 Change U507 Y Change U300 END N N Y F301 pin 1 2 5 6 Change F301 N Y F300 pin 1 60 dBm Check D300 pin 1 1 V Resol...

Page 41: ...solder CN500 LAM1 Pin 1 25 dBm Resolder or Change LAM1 Y Y Y Change U510 END Y N Y Change OSC300 N N N U510 pin 2 0 dBm Y Resolder or Change U505 Y N U505 Pin 11 25 dBm N N Resolder or Change U503 Q501 Y Resolder or Change U512 Y Change U300 N Change U508 Check voltage Pin 2 L Pin 4 H Pin 8 L Pin 10 H U513 Pin 9 L Pin 7 H U513 pin 3 1 2 3V Check OSC300 pin1 10 dBm Check U510 pin14 1V 2V Change U51...

Page 42: ...3 G G 4 6 GND4 GND5 9 11 GND6 13 GND7 GND8 15 GND9 17 GSMIN 4 GSMOUT 10 VCC1 19 20 GND12 21 GND13 GND14 22 23 GND15 GND16 24 GND2 3 GND3 5 7 APC 14 BS 16 DCSIN 2 12 DCSOUT 1 GND1 18 GND10 GND11 R500 U510 LOGND 12 LOIN 13 1 NC 11 NC STEPSEL 18 VCC 5 6 VCC VCC 20 G 22 23 G G 24 GAINSEL 7 IFOUT 17 16 IFOUT 8 LNA1800IN 4 LNA900IN 2 G 25 G G 26 3 G 9 G G 15 G 19 21 G U507 14 BANDSEL1 10 ENA C544 C530 1...

Page 43: ... GND1 5 GND2 1 IN 4 10NF C312 F300 C321 1NF 470PF C314 100nH L301 100nH L303 18PF C326 1NF C308 NC C306 10nH L307 VCC3 18 VCC4 24 31 VCC5 VCC6 34 VCC7 45 VCPO 19 22PF C311 2 TXENA 48 6 TXIF TXIF 7 47 TXIN 46 TXINR TXMO 13 14 TXMO 23 V VCC1 3 VCC2 4 LD 15 LE LOIN 43 LOINR 42 11 Q Q 12 33 RES1 RES2 32 39 RXENA 38 RXMO SXENA 37 TLCPO GND7 35 44 GND8 I 9 I 10 41 IF1N IF1N 40 IF2O 26 IF2O 27 28 IFI2 IF...

Page 44: ...ooting and Circuit Diagram R301 C309 R300 18 VRF 10 R304 18 Uhf_Tune Rxlo1 Txlo1 OSC300 VTUNE C302 3 9PF 6 8K Highband 3 9PF R314 68UF 6 3V BSEL 4 GND1 2 7 DCPW 3 R313 R312 4 7K 1 C332 18 470PF C305 C336 C329 100 6 5 1 RF_OUT 8 10NF 390PF 47NF C303 3 9PF C331 18PF C327 C307 22PF R305 ...

Page 45: ... Samsung Electronics Co Ltd MAY 2001 Pinted in Korea Code No GH68 02031A BASIC ELECTRONICS ...

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