Samsung SCH-A302 Service Manual Download Page 43

Page: 43 / 53

SAMSUNG Proprietary-Contents may change without notice

9-1

9. SCH-A302 PCB Diagrams

1. Main PCB Top Diagram

C 1 0 4

C 1 1 4

C 1 2 9

C 1 4 4

C160

C161

C162

C201

C202

C203

C204

C205

C207

C208

C 2 0 9

C 2 1 0

C 2 1 1

C 2 1 3

C 2 1 4

C215

C 2 1 6

C 2 1 7

C218

C219

C220

C 2 2 1

C222

C223

C225

C226

C227

C 2 2 9

C 2 3

C 2 3 0

C 2 3 1

C 2 3 3

C234

C235

C 2 3 7

C 2 3 8

C239

C 2 4 0

C243

C244

C 2 5 0

C 3 1 8

C 3 2 0

C 3 2 1

C 3 2 3

C 3 3 1

C 3 3 2

C333

C 3 3 4

C 3 3 5

C 3 3 7

C 3 3 8

C 3 3 9

C 3 4 0

C 3 4 1

C342

C343

C 3 4 4

C 3 4 5

C346

C349

C350

C370

C371

C372

C373

C374

C375

C376

C377

C 3 7 8

C379

C380

C 3 8 1

C 3 8 2

C 3 8 3

C 3 8 4

C385

C 3 8 6

C 3 8 7

C 3 8 8

C389

C 3 9 0

C 3 9 1

C 3 9 2

C 3 9 3

C 3 9 4

C395

C396

C397

C 3 9 8

C 4 2 8

C 5 0 1

C 5 0 2

C 5 0 3

C 5 1 3

C514

C525

C 5 2 6

C 5 3 8

C549

C 5 6 6

C 5 6 7

C 5 6 8

C 6 0 8

C 6 1 5

C 6 1 6

C 6 1 9

C 6 2 0

C 6 2 1

CN101

CN303

D160

D201

D202

D302

D303

D350

D351

D601

F303

L201

L202

L 2 0 4

L 2 0 5

L206

L209

L210

L211

L 2 1 2

L311

L318

L319

L321

L322

L323

L324

L325

L 3 2 6

L327

L328

L329

L330

L331

L332

Q160

Q161

Q 3 5 0

R 1 0 3

R 1 0 4

R 1 0 5

R 1 0 8

R 1 0 9

R 1 1 1

R 1 3 6

R 1 3 8

R 1 4 1

R 1 4 7

R160

R161

R162

R 1 6 9

R 1 7 0

R171

R172

R175

R202

R203

R 2 0 4

R 2 0 5

R206

R207

R 2 0 8

R209

R 2 1 0

R 2 1 1

R212

R 2 1 3

R 2 1 4

R215

R216

R 2 1 8

R 2 1 9

R220

R 2 2 1

R311

R 3 1 2

R 3 1 3

R 3 1 5

R316

R 3 1 7

R 3 1 8

R319

R 3 3 0

R 3 3 1

R 3 5 1

R 3 5 2

R370

R 3 7 1

R 3 7 2

R 3 7 3

R374

R375

R376

R 3 7 7

R 3 7 8

R380

R501

R 5 0 2

R 5 0 3

R524

R 5 3 2

R560

R 6 2 1

R622

R 6 2 5

U101

U103

U106

U202

U203

U204

U302

U360

U361

U501

U609

V100

V101

V102

V103

X501

ZD103

Summary of Contents for SCH-A302

Page 1: ...tion 2 Trouble Shooting 3 Tune up Procedure Test Procedure list 4 Frequency Synthesizer Circuit Spurious Radiation Suppression Circuit 5 NAM Programming 6 Electrical Parts List 7 Exploded Views Parts List 8 Block Diagram 9 PCB Diagrams 10 Circuit Description Circuit Diagrams ...

Page 2: ... Samsung Electronics Co Ltd December 2001 Pinted in Korea Code No GH68 02488A BASIC ELECTRONICS ...

Page 3: ...ber of Channels 20 FA Duplex Separation 45 MHz In Output Impedance 50 Ω TX Intermediate Freq 130 38 MHz RX Intermediate Freq 85 38 MHz TX Local Freq 1st FTX 130 38 MHz 2nd 260 76 MHz RX Local Freq 1st FTX 210 38 MHz 2nd 170 76 MHz TCXO freq 19 68 MHz Freq Stability FRX 45 MHz 350 Hz Operating Temperature 30 C 60 C Supply Voltage 3 8 V SMALL 81 x 42 x 21 mm 84 g Size and Weight MIDDLE 81 x 42 x 22 ...

Page 4: ...equency 1st FTX 130 38 MHz 2nd 260 76 MHz RX Local Frequency 1st FRX 85 38 MHz 2nd 170 76 MHz TCXO Frequency 19 68 MHz Freq Stability FRX 45 MHz 150 Hz Operating Temperature 30 C 60 C Supply Voltage 3 8 V 2 2 TRANSMITTER Waveform Quality 0 944 or more Open Loop Power Control 25 dBm 57 5 dBm 38 5 dBm 65 dBm 17 5 dBm 1 5 dBm 104 dBm 18 0 dBm 30 0 dBm Minimum TX Power Control Below 50 dBm Closed Loop...

Page 5: ...cies 47 dBm Single Tone Desensitization Rx Power level 101 dBm Tone Power level 30 dBm Lower than 1 Tone Offset from Carrier 900 kHz Intermoculation Spurious Response Attenuation Tone 1 offset from carrier 900 kHz Tone 2 offset from carrier 1 700 kHz Test 1 2 Rx power 101 dBm Tone 1 power 43 dBm Tone 2 power 43 dBm Test 3 4 Lower than 1 Rx power 90 dBm Tone 1 power 32 dBm Tone 2 power 32 dBm Test ...

Page 6: ...Shooting 1 Logic Section 1 1 No Power Y U501 pin38 Input HIGH Check Q507 Q509 and its neighboring circuits N Y U501 pin6 pin10 output 2 8 V Check U501 pin6 pin10 and its neighboring circuits N Y U501 pin39 Input HIGH Check R536 and its neighboring circuits N END Press PWR button ...

Page 7: ... and its neighboring circuits Replace if required N Y TCXO CL signal outputted from OSC401 pin4 Check OSC401 and its neighvoring circuits Replace if required N Y TCXO CL signal outputted from OSC402 pin4 Check OSC402 and its neighvoring circuits Replace if required N Y LED on Check the LED and its neighboring circuits Replace if required N Y Normal initial display on LCD Check the LCD pins and its...

Page 8: ...1 pin1 and its neighboring circuits Replace if required N Y L level outputted from U501 pin2 Check U501 pin1 and its neighboring circuits Replace if required N Press any button on the phone Backlight LED on 1 4 Abnormal Key Data Input Y Scanning signals outputted from U609 pins C2 A3 E4 D3 C1 Check keypad dom switch Replace if required N Check initial status END ...

Page 9: ...m U609 pin L16 pin M17 Check the U609 pin and its neighboring circuits Replace if required N Y CLK waveform outputted from CON500 pin 5 Resolder CON500 and its neighboring circuits Replace if required N Y Key tone waveform applied to C561 Check C631 Replace if required N Y Normal Keytone Replace the SPK assembly N Abnormal Keytone END ...

Page 10: ...red N Y CLK waveform applied to Q511 Base Check R552 Q511 and its neighboring circuits Replace if required N Y Is the buzzer connection correct Connect the buzzer correctly N Abnormal Keytone Check the buzzer and replace if required 2 Transmitter Section Abormal transmitter section Y Turn On Max PWR N Check U402 local level Y Check U204 TX RFT out level OK N Check U201 PWR AMP out level OK N 10 0 ...

Page 11: ...nts may change without notice 2 6 SCH A302 Trouble Shooting 3 Receiver Section CDMA MODE Y Check CDMA Rx path N Y Setup CDMA call OK Normal CDMA SVC ROAM OK Check Transmitter N Start CDMA mode Measure CDMA FER N Normal CDMA RF ...

Page 12: ... HP Equipment setting RF ch 363 RX 880 89 MHz TX 835 89 MHz at CALL CTRL MENU sctr A pwr 25 dBm for more easy to check use Spectrum Analyzer Rf Lvl offset 1 4 at config screen Spectrum Analyzer Setting center Freq 880 89 MHz when check RXRF in 363 Ch span 5 MHz RF input line from Duplex to Mixer check point CN302 input and Duplex out You can check Duplex out at C652 is ok LNA U360 input output and...

Page 13: ...SC401 19 68 MHz 4 IFR3000 U302 37 check TCXO N 4 96 MHz TCXO N 38 check CHIP X8 9 84 MHz 4 5 Reference Regulators PM1000 U501 RESET B7 RESET SIGNAL OUT 3 0_RX H5 RX CIRCUIT OPERATING VOLTAGE 3 0_TX G5 TX CIRCUIT OPERATING VOLTAGE Controlled By Idle Signal 3 0_IF H7 RFT3100 IFR3000 AND Etc 4 6 SAMPLING REPAIR RESULT SCH A302 1 No 1 24108148669 Tx Power Problem TX IF does not out from RFT3100 U204 p...

Page 14: ...XO upper case pushed then case and inside components were short when B D is twisted Estimated factor TCXO After replace TCXO It working ok 6 No 6 24108221088 Problem with display When power on display was abnormal working LCD and neighbor patterns are ok Estimated Factor Broken data which is in E2PROM Data Rebuilding OK 7 No 7 24108134768 RX problem No SVC Handset doe not acquire SVC then searchin...

Page 15: ...de HP8596E 2 Configuration of Test SAMSUNG Proprietary Contents may change without notice 3 1 RF cable DUT Data cable Test Jig To A Out To A In Directional Coupler DC Power Supply 3 93 V RF IN OUT Audio OUT Audio IN HP8924C RF IN Spectrum Analyzer CAUTION The test jig and data cable has a voltage drop of 0 15 V at FM Max power output you d better set the DC power supply is 3 8 V for normal test co...

Page 16: ... 2 3 4 5 6 Change to Test Mode A To Change the phone s state from Normal Mode to Test Mode You should enter the following keys Press 7 5 9 8 1 3 5 8 0 A Y B The Command 2 1 is mode and channel change 20363 Channel number Mode CDMA and Push the OK Key to save C The command 0 1 is Suspend D To finish the Test Mode You should enter the command 0 2 Channel Selection and Tx Power Output Level Control 1...

Page 17: ... restart If you select a wrong key press CLR then enter new command To exit the Test Mode at any time just press 0 2 2 FREQUENCY 0 1 Suspend ACCURACY 0 9 0 3 6 3 Set channel to 363 0 7 Carrier On 3 4 Spread spectrum 7 1 3 0 0 Set AGC level Measure the TX frequency 836 49 MHz 300 Hz 3 OCCUPIED CDMA 0 1 Suspend BANDWIDTH 0 9 0 3 6 3 Set channel to 383 0 7 Carrier On 3 4 Spread spectrum 7 1 X X X Ent...

Page 18: ... setting 8 Piolot 7 dBm 9 Traffic 7 4 dBm 10 Pwr cotl always up Config screen shift test 1 RF level offset on 2 RF in out 1 4 dBm Etc 1 Test cable loss 1 4 dBm 2 Splitter loss input measured loss A method of measurement Call control screen 1 HP8924C channel equal to CDMA terminal 2 Send call Power Always up Sector A power 104 dBm 3 Spectrum analyser Mode cdma analyser Freq occupy bandwidth occupie...

Page 19: ...c and handset using data link cable or jig box 2 Power on the phone Please check that the phone is in DM mode Menu 4 9 If it is in Handsfree mode please change it to DM mode and press ok The phone will be restarted 3 Run the Ndloader 4 To make sure that your phone is connected with Ndloader click icon on the program you would get the phone information 5 Click folder icon on the Ndloader to choose ...

Page 20: ...ng is made by the control voltage VCO PLL The PLL VCO Module OSC402 U402 generates the signal having 966 12 5 MHz center frequency with the voltage control The PLL VCO OSC402 U402 controls this signal The PLL VCO Module OSC402 U402 includes prescalers and charge pump The reference divider in the PLL VCO Module OSC402 U402 divides the frequency of VCTCXO by 1968 and makes reference frequency 10kHz ...

Page 21: ...al of transmission So it suppress the spurious radiation Table The characteristic of CDMA duplexer filter F302 T X R X T X to R X PARAMETER VALUE Center Frequency 836 5 MHz FT Bandwidth FT 12 5 MHz Insertion Loss at BW 3 0 dB Max VSWR at BW 1 8 Max Input power 3 0 W Max Attenuation 869 894 MHz 40 dB Min Ripple at BW 1 6 dB Max Center Frequency 881 5 MHz FR Bandwidth FR 12 5 MHz Insertion Loss at B...

Page 22: ...selects NAM programming NAM Program 1 General 2 NAM1 Setup 1 Choose General 3 NAM2 Setup 4 Advanced ESN B0000000 Volume Electronic Serial Number of the phone is displayed CAI version 3 Volume Common Air Interface version is displayed 13K EVRC 8K Vocoder sample rate 13K voice or changes the status OK stores it 8K is not supported SCM Station Class Mark displays the power class 01101010 Volume trans...

Page 23: ... CDMA Access Overload Class current status is 0 class number displayed OK to change enter new one stores it Pchn Sys A Primary CDMA Channel for System A is displayed 000 channel number to change enter new one OK stores it Pchn Sys B Primary CDMA Channel for System B is displayed 000 channel number to change enter new one OK stores it Schn Sys A Secondary CDMA Channel for System A is displayed 000 ...

Page 24: ...r changes the status OK stores it CDMA fNID CDMA foreign NID current value is displayed Yes or changes the status OK stores it HomeSID 1 4 CDMA HOME SIDs written in the list current value is 4120 number displayed OK to change enter new one stores it HomeNID 1 4 CDMA HOME NIDs written in the list current value is 65535 number displayed OK to change enter new one stores it ...

Page 25: ...3 005061 C107 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 005061 C108 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 000254 C109 C CERAMIC CHIP 10 nF 10 16 V X7R TP 1005 1 2203 000233 C110 C CERAMIC CHIP 0 1 nF 5 50 V NP0 TP 1005 1 2203 005061 C111 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 000233 C112 C CERAMIC CHIP 0 1 nF 5 50 V NP0 TP 1005 1 2203 005061 C113 C CERAMIC C...

Page 26: ...04 001017 C160 C TA CHIP 1 uF 20 10 V GP TP 2012 2 0 1 2203 000940 C161 C CERAMIC CHIP 470 pF 10 50 V X7R TP 1005 1 2203 000940 C162 C CERAMIC CHIP 470 pF 10 50 V X7R TP 1005 1 2203 000628 C201 C CERAMIC CHIP 0 022 nF 5 50 V NP0 TP 1005 1 2203 005061 C202 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 000885 C203 C CERAMIC CHIP 4 7 nF 10 25 V X7R TP 1005 1 2203 000995 C204 C CERAMIC CHIP 0 0...

Page 27: ...2203 000386 C240 C CERAMIC CHIP 0 015 nF 5 50 V NP0 TP 1005 1 2203 000438 C250 C CERAMIC CHIP 1 nF 10 50 V X7R TP 1005 1 2203 001437 C318 C CERAMIC CHIP 5 pF 0 25 pF 50 V X7R TP 1005 1 0 1 2203 000254 C320 C CERAMIC CHIP 10 nF 10 16 V X7R TP 1005 1 2203 005382 C321 C CERAMIC CHIP 0 006 nF 0 1 pF 50 V NP0 TP 1005 1 2203 001437 C323 C CERAMIC CHIP 5 pF 0 25 pF 50 V X7R TP 1005 1 0 1 2203 000438 C331...

Page 28: ...P 1005 1 2203 000438 C382 C CERAMIC CHIP 1 nF 10 50 V X7R TP 1005 1 2203 005444 C383 C CERAMIC CHIP 0 003 nF 0 1 pF 50 V NP0 TP 1005 1 2203 002443 C384 C CERAMIC CHIP 0 33 nF 10 50 V X7R TP 1005 1 2203 005480 C385 C CERAMIC CHIP 33 nF 10 10 V X7R TP 1005 1 2203 005061 C386 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 000233 C387 C CERAMIC CHIP 0 1 nF 5 50 V NP0 TP 1005 1 2203 005061 C388 C...

Page 29: ...005 1 2203 000233 C424 C CERAMIC CHIP 0 1 nF 5 50 V NP0 TP 1005 1 2203 000254 C425 C CERAMIC CHIP 10 nF 10 16 V X7R TP 1005 1 2203 000233 C426 C CERAMIC CHIP 0 1 nF 5 50 V NP0 TP 1005 1 2203 000278 C427 C CERAMIC CHIP 0 01 nF 0 5 pF 50 V NP0 TP 1005 1 2203 000254 C428 C CERAMIC CHIP 10 nF 10 16 V X7R TP 1005 1 2203 000995 C429 C CERAMIC CHIP 0 047 nF 5 50 V NP0 TP 1005 1 2203 000233 C431 C CERAMIC...

Page 30: ... 1 2203 001724 C527 C CERAMIC CHIP 4700 nF 80 20 16 V Y5 V TP 3216 1 2203 005061 C528 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 000233 C529 C CERAMIC CHIP 0 1 nF 5 50 V NP0 TP 1005 1 2203 001598 C530 C CERAMIC CHIP 2200 nF 80 20 16 V Y5 V TP 2012 1 2203 005061 C531 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 001598 C532 C CERAMIC CHIP 2200 nF 80 20 16 V Y5 V TP 2012 1 2404 0010...

Page 31: ...TP 1005 1 2203 000254 C616 C CERAMIC CHIP 10 nF 10 16 V X7R TP 1005 1 2203 005061 C617 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 005061 C618 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 005061 C619 C CERAMIC CHIP 100 nF 80 20 16 V Y5 V TP 1005 1 2203 000254 C620 C CERAMIC CHIP 10 nF 10 16 V X7R TP 1005 1 2203 000254 C621 C CERAMIC CHIP 10 nF 10 16 V X7R TP 1005 1 2203 000254 C62...

Page 32: ... 001122 F302 FILTER DUPLEXER 881 5 MHz 836 5 MHz 4 2 5 dB TP 824 849 1 2904 001173 F303 FILTER SAW 881 5 MHz 25 MHz 12 5 MHz 2 dB TP 12 5 MHz 3 5 dB 1 4709 001242 F401 COUPLER DIRECTION 925 960 MHz 10 1 5 dB 23 dB 2 x 1 25 x 1 mm 1 3710 001585 J101 CONNECTOR SOCKET 20P 2R 0 5 mm SMD S A uF 1 3710 001585 J102 CONNECTOR SOCKET 20P 2R 0 5 mm SMD S A uF 1 3301 001120 L201 CORE FERRITE BEAD AB 30 ohm 2...

Page 33: ...1 3301 001342 L501 CORE FERRITE BEAD AB 1 5 kohm 1 x 0 5 x 0 5 mm 100 mA TP M 1 2703 001748 L601 INDUCTOR SMD 5 6 nH 0 3 nH 1 0 x 0 5 x 0 5 mm 1 2703 001952 L602 INDUCTOR SMD 8 2 nH 5 1 0 x 0 5 x 0 5 mm 1 2809 001241 OSC401 OSCILLATOR VCTCXO 19 68 MHz 2ppm 10 kohm 10 pF TP 2 8 V 1 5mA 1 2806 001200 OSC402 OSCILLATOR VCO 967 MHz 50 TP 3 V 8 5 mA 1 0501 002202 Q101 TR SMALL SIGNAL MMBT2222AWT1 NPN 1...

Page 34: ...m 5 1 16 W DA TP 1005 1 2007 000138 R125 R CHIP 100 ohm 5 1 16 W DA TP 1005 1 2007 000138 R126 R CHIP 100 ohm 5 1 16 W DA TP 1005 1 2007 001313 R127 R CHIP 330 ohm 5 1 16 W DA TP 1005 1 2007 000138 R128 R CHIP 100 ohm 5 1 16 W DA TP 1005 1 2007 000138 R129 R CHIP 100 ohm 5 1 16 W DA TP 1005 1 2007 000162 R130 R CHIP 100 kohm 5 1 16 W DA TP 1005 1 2007 001319 R131 R CHIP 1 2 kohm 5 1 16 W DA TP 100...

Page 35: ... 1 16 W DA TP 1005 1 2007 000140 R207 R CHIP 1 kohm 5 1 16 W DA TP 1005 1 2007 007771 R208 R CHIP 0 ohm 5 1 16 W DA TP 1005 1 2007 000148 R209 R CHIP 10 kohm 5 1 16 W DA TP 1005 1 2007 007309 R210 R CHIP 12 kohm 1 1 16 W DA TP 1005 1 2007 007771 R211 R CHIP 0 ohm 5 1 16 W DA TP 1005 1 2007 007771 R213 R CHIP 0 ohm 5 1 16 W DA TP 1005 1 2007 001320 R214 R CHIP 1 8 kohm 5 1 16 W DA TP 1005 1 2007 00...

Page 36: ... 16 W DA TP 1005 1 2007 003006 R410 R CHIP 16 ohm 5 1 16 W DA TP 1005 1 2007 007771 R411 R CHIP 0 ohm 5 1 16 W DA TP 1005 1 2007 003010 R413 R CHIP 20 ohm 5 1 16 W DA TP 1005 1 2007 000141 R414 R CHIP 2 2 kohm 5 1 16 W DA TP 1005 1 2007 000144 R415 R CHIP 5 1 kohm 5 1 16 W DA TP 1005 1 2007 007771 R418 R CHIP 0 ohm 5 1 16 W DA TP 1005 1 2007 000172 R420 R CHIP 10 ohm 5 1 16 W DA TP 1005 1 2007 007...

Page 37: ...DA TP 1005 1 2007 000143 R542 R CHIP 4 7 kohm 5 1 16 W DA TP 1005 1 2007 000153 R543 R CHIP 22 kohm 5 1 16 W DA TP 1005 1 2007 000162 R544 R CHIP 100 kohm 5 1 16 W DA TP 1005 1 2007 000140 R552 R CHIP 1 kohm 5 1 16 W DA TP 1005 1 2007 007771 R553 R CHIP 0 ohm 5 1 16 W DA TP 1005 1 2007 007137 R554 R CHIP 1 2 kohm 1 1 16 W DA TP 1005 1 2007 000165 R603 R CHIP 200 kohm 5 1 16 W DA TP 1005 1 2007 000...

Page 38: ...A 0 7 W SC 74 1 0505 001376 U203 FET SILICON FDC6329L N P 8 V 2 5A 0 7 W SC 74 1 1204 001682 U204 IC IF FM AM RFT3100 BCC 32P 196MIL PLASTIC 3 V 30to 85C TP 1 1204 001581 U302 IC IF CIRCUIT IFR3000 48BCCF TR BCC 48P PLASTIC 3 5 V 1 1205 001943 U360 IC DATA COMM GEN RF2366TR7 SOT23 6 6P PLASTIC 8 V 1 1205 001928 U361 IC MIXER CMY212B SOP 8P 63MIL PLASTIC 5 V 55to 150C TP 1 1209 001197 U402 IC PLL L...

Page 39: ...SAMSUNG Proprietary Contents may change without notice 7 1 7 SCH A302 Exploded View parts list 1 Cellular phone Exploded View 1 2 4 5 3 7 8 9 10 20 21 22 17 18 19 6 11 13 14 15 12 16 23 24 ...

Page 40: ...ATTERY Description Remark SEC CODE Gold Silver Location No GH72 03350A GH75 01081C GH59 00109A GH96 00918A 3001 001176 GH31 00018A GH75 01016D GH72 02386J GH68 00370H 6001 000464 GH73 00921B 3003 001053 GH73 00441A GH75 00687D GH72 01572A GH72 01582L GH75 00719A GH59 00107A GH92 00996A GH42 00126A GH73 00440D GH75 00690E 6001 000883 GH43 00339A GH43 00332A GH72 03350A GH75 01081B GH59 00109A GH96 ...

Page 41: ...P L L V C O 1 2 2 6 0 7 6 M H z T A N K C I RC U IT V C T C X O 1 9 6 8 M H z 1 7 0 7 6 M H z T A N K C I RC U IT P L L V CO ANT ENNA DUPLEXER BUF FER B U F F E R 8 24 64 8 4 8 37 M Hz 869 64 893 37MHz LNA 955 02 978 75MHz 9 55 02 97 8 7 5M H z F c 1 3 0 3 8 MH MH Z IF AMP M Hz Fc 85 38 3 6 V B A T T ER Y 3 0 M C R EC E IV ER U n i t M IC M S M 3 0 M A D R IV ER 3 0 M P 3 0 IF 3 0 SY N COUPLER RF ...

Page 42: ...SAMSUNG Proprietary Contents may change without notice 8 2 SCH A302 Block Diagram MEMO ...

Page 43: ... C394 C 3 9 5 C 3 9 6 C397 C398 C428 C501 C502 C503 C513 C 5 1 4 C525 C526 C538 C 5 4 9 C566 C567 C568 C608 C615 C616 C619 C620 C621 CN101 CN303 D160 D201 D202 D302 D303 D 3 5 0 D 3 5 1 D601 F303 L201 L202 L204 L205 L 2 0 6 L209 L210 L211 L212 L311 L318 L319 L321 L322 L323 L 3 2 4 L 3 2 5 L326 L 3 2 7 L 3 2 8 L 3 2 9 L 3 3 0 L331 L 3 3 2 Q160 Q161 Q350 R103 R104 R105 R108 R109 R111 R136 R138 R 1 4...

Page 44: ...C617 C618 C622 C640 C641 C651 C652 C 6 5 3 C654 C655 C 6 5 6 C663 CN301 CN302 D501 D602 F101 F102 F103 F201 F301 F302 F401 J101 J102 L213 L302 L303 L307 L320 L402 L403 L405 L406 L 5 0 1 L 6 0 1 L602 LWR1 OSC401 OSC402 Q101 Q102 Q501 Q502 Q503 Q505 Q507 Q508 Q509 Q511 R 1 0 1 R106 R 1 1 0 R115 R117 R118 R121 R122 R 1 2 3 R 1 2 4 R 1 2 5 R 1 2 6 R127 R128 R 1 2 9 R130 R 1 3 1 R132 R133 R134 R137 R13...

Page 45: ...e 2 8 V from the pin 6 and pin10 of the U501 is used in the digital parts of MSM The voltage 3 0 V from the pin 20 of the U501 is used in the parts of IFR The voltage 3 0 V from the pin 15 of the U501 is used in the RX parts of RF The voltage 3 0 V from the pin 18 of the U501 is used in the TX parts of RF The voltage 2 7 V from U501 is used in the analog part 2 Logic Part The logic part consists o...

Page 46: ...n A17 19 68 MHz This clock signal from the IFR is the reference clock for the MSM except in CDMA mode CHIPX8 pin 2G 9 8304 MHz The reference clock used during the CDMA mode SLEEP XTAL IN OUT pins R17 T17 32 768 MHz IFR INTERFACE CDMA FM Data Interface TXIQDATA0 7 pins 11 12 13 14 15 16 17 18 TX data bus used during COMA and FM mode C_RX_IDATA0 3 pins 45 48 and C_RX_QDATA0 3 pins 39 42 RX data bus ...

Page 47: ...ssor is 2 9 kHz dev attack time is 3 mS and release time is 13 5 mS Limiter The limiter performs to cut 0 53 Vp p or higher audio signal level so that the FM frequency deviation is not over 12 kHz dev The function is sued confusion over phone line LPF is used to reduce a specific high frequency of limited signal RX AUDIO PATH De Emphasis Circuit This circuit is lst LPE featuring 6 dB oct to reduce...

Page 48: ...ignal having 966 MHz center frequency and 12 5 MHz deviation with voltage control The VCO PLL Module OSC402 U402 controls this signal Input reference frequency is generated at VC TCXO OSC402 U402 and RF local signal is generated at VCO PLL OSC402 U402 The VCO PLL OSC402 U402 compares the two signals and generates the desired signal with a preprogrammed counter which controls voltage Voltage Contro...

Page 49: ...ss Filter BPF The RF BPF F303 F201 accepts only specific frequency 836 03 12 5 MHz to send it out to base station module The bandwidth is 25 MHz PM1000 The PM1000 U501 supply a regulated power to each part of transmitter U501 supplies 3 0 V to the RFT3100 U204 and VBATT is connected to power amp module U201 directly ...

Page 50: ...ace V o co de r EV RC 13K Mode Select Interface AN SI IEEE 11 49 1A 199 3 JT A G Inter fce SB I DFM P ro ce ssor CDMA P ro ce ssor T x D A C s IFR30 0 0 RFT 3 10 0 Transmit I and Q Data Receive Data POWER A M P M ODU LE RF RX PA RT D U PLEXER 19 68MHz RINGER T W L 2 2 1 4 Char gi ng system PC Co nn ect iv it y T est D eb ug Syst em VCT CXO Digital Test Bus 32 768 K hz SRAM FLASH EEPROM LCD display...

Page 51: ..._LO_ADJ B11 C6 TRST_N TX_AGC_ADJ A12 VDD_A1 D5 D10 VDD_A2 VDD_A3 F4 F15 VDD_A4 VDD_A5 L14 VDD_C1 SBCK A1 B1 SBDT B2 SBST A8 SLEEP_N SLEEP_XTAL_IN T17 R17 SLEEP_XTAL_OUT SYNTH_LOCK C10 D4 TCK TCXO A17 TDI B4 A5 RD_N N17 RESIN_N RESOUT_N P17 RFR_N E17 J3 RFR_N2 RINGER C14 R15 ROM_CS1_N P4 ROM_CS2_N RSVD1 A16 B16 RSVD2 A11 RX_AGC_ADJ D6 C11 PA_ON2 PA_R0 A9 D7 PA_R1 C8 PDM1 PDM2 B9 Q_OFFSET B10 B5 Q_O...

Page 52: ...T PD_ISET 27 28 PD_OUT RF_LO 19 24 SBCK SBDT 23 22 SBST TCXO 25 34 G 35 G 36 G 6 IF_BPF1 IF_BPF2 7 IREF 32 26 LOCK_DET PA_ON 17 PCSA_OUT 13 AB_SEL 21 CELLA_OUT 15 14 CELLB_OUT 33 G C220 33UF 6 3V RFT3100 32BCCPF MT U204 3 0_TX_RF 3 0_TX_IF 100PF C413 C418 C408 100PF 10NF 10NF C416 3 9NF 10nH L206 C428 3 0_TX 3 0_TX 3 0_TX 3 0_TX 47PF C216 0 R211 G 3 G 4 G G 6 IN 2 5 OUT 3 0_TCXO R648 F201 1 NC 120...

Page 53: ... 100PF 1 3 2 2 7nH Q503 L320 100PF C507 100NF C527 4 7UF D303 C510 NC C505 C524 100NF 6 3V 10UF C379 16V 4 7UF C525 VDD6 20 24 VDD7 35 VDD8 VDDM 44 3 0_SYN 36 TCXO 37 TCXO N VCONTROL 7 VDD1 4 6 VDD2 14 VDD3 15 VDD4 VDD5 17 39 RXQD3 25 RXVCO_OUT RXVCO_T1 21 22 RXVCO_T2 32 SBCK_SLEEP 31 SBDT_FM SBI_EN 26 SBST_IDLE 30 GND8 GND9 34 28 I_OFFSET Q_OFFSET 27 46 RXID2 RXID3 45 RXQD0 42 41 RXQD1 RXQD2 40 G...

Search results

Summary of Contents for SCH-A302

Reviews:

Related manuals for SCH-A302

Brands by name

Popular brands

Samsung SCH-A302, Service Manual

Search results

Summary of Contents for SCH-A302

Reviews:

Related manuals for SCH-A302

Brands by name

Popular brands