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Samsung SGH-N300 Service Manual Download Page 5

NO

SEC CODE

DESCRIPTION

COLOR

SVC Q`TY REMARKS

1-2  Main Parts List

Exploded Views and Parts List

1-2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

GH75-00757B

FRONT-COVER ASSY

SILVER

1

1-1

GH72-02228B

FRONT-COVER

SNA

1

1-2

GH75-00760B

FLIP-COVER ASSY

1

1-3

GH72-02229B

DUMMY-FRONT

SNA

1

1-4

GH72-01851A

REFLECTOR-LED

SNA

1

1-5

GH74-01369A

SPONGE-SPEAKER

SNA

1

1-6

GH72-01203B

WEB-KEY

SNA

1

1-7

GH75-00350A

HINGE-ASSY

SNA

1

1-8

GH72-01852A

WINDOW-LCD

SNA

1

GH07-00070A

LCD-ASSY

1

2-1

3003-001025

MIC

1

2-2

GH72-01856A

SHIELD-FRONT

SNA

1

GH75-00762A

REAR-COVER ASSY

D/GRAY

1

3-1

GH72-01855A

REAR-COVER

SNA

1

3-2

GH74-00466A

TAPE-MOTOR

SNA

1

3-3

GH73-00511A

COVER-EARPHONE

SNA

1

3-4

GH72-02364A

SIM-COVER

1

3-5

GH72-01205A

LOCKER-MAIN

SNA

1

GH75-01076A

VOLUME-KEY ASSY

1

GH71-10639A

STRIP-FINGER

4

GH72-02230A

KEY-PAD

1

GH73-00628A

HOLDER-MIC

1

GH74-01329A

SPONGE-STIFFER

1

GH74-01328A

SPONGE-SPEAKER

1

3001-001192

SPEAKER

1

GH73-00348B

HOLDER-BUZZER

1

6001-001285

SCREW M1.4*3

3

GH92-00981A

PBA

1

GH73-00350A

RUBBER-CONNECTOR

1

GH72-01858A

SHIELD-R/F

1

GH31-00019A

VIBRATION

1

GH71-00483A

BRACKET-ANT

1

GH73-00079A

CAP-MOBILE

1

GH42-00102A

ANTENNA

1

6001-001345

SCREW M1.7*6

1

GH75-00540C

LOGO-BADGE

1

6001-001148

SCREW M2*5

4

GH68-01777A

LABEL-MAIN

1

GH43-00291A

BATTERY-STD

1

Summary of Contents for SGH-N300

Page 1: ...ERVICE DUAL BAND Mobile Cellular Phone SGH N300 Manual DUAL BAND Mobile Cellular Phone CONTENTS 1 Exploded Views and Parts List 2 PCB Diagrams 3 Electrical Parts List 4 Block Diagrams 5 Flow Chart of Troubleshooting ...

Page 2: ...Samsung Electronics Co Ltd Printed in Korea 06 2001 Rev 1 0 GH68 02097A ELECTRONICS ...

Page 3: ...CB Diagrams 2 1 Main Top 2 2 Main Bottom 3 Electrical Parts List 3 1 Main Parts List Top 3 2 Main Parts List Bottom 4 Block Diagrams 4 1 Main Base Band 4 2 Main RF 5 Flow Chart of Troubleshooting 5 1 Power ON 5 2 Initial 5 3 Charging Part 5 4 Sim Part 5 5 Microphone Part 5 6 Speaker Part 5 7 Key Data Input 5 8 Alert tone 5 9 Ring Indicator 5 10 Back Light 5 11 GSM Receiver 5 12 GSM Transmitter 5 1...

Page 4: ...1 1 Exploded Views and Parts List 1 Exploded Views and Parts List 1 1 Main 1 5 2 11 9 10 12 14 16 13 15 17 18 19 20 22 23 24 21 4 1 2 1 3 1 4 1 1 1 6 2 2 3 2 3 3 3 1 3 4 3 5 1 8 1 7 1 5 2 1 3 6 7 8 ...

Page 5: ...T SNA 1 GH75 00762A REAR COVER ASSY D GRAY 1 3 1 GH72 01855A REAR COVER SNA 1 3 2 GH74 00466A TAPE MOTOR SNA 1 3 3 GH73 00511A COVER EARPHONE SNA 1 3 4 GH72 02364A SIM COVER 1 3 5 GH72 01205A LOCKER MAIN SNA 1 GH75 01076A VOLUME KEY ASSY 1 GH71 10639A STRIP FINGER 4 GH72 02230A KEY PAD 1 GH73 00628A HOLDER MIC 1 GH74 01329A SPONGE STIFFER 1 GH74 01328A SPONGE SPEAKER 1 3001 001192 SPEAKER 1 GH73 0...

Page 6: ...Exploded Views and Parts List 1 3 Travel Adapter 1 4 Travel Adapter Parts List TYPE SEC CODE REMARK A GH44 00119C CHINA B GH44 00119A EUROPE C GH44 00119B UNITED KINGDOM D Gh44 00119D AUSTRALIA 1 3 ...

Page 7: ...Exploded Views and Parts List 1 5 Ciger Light Adapter 1 4 1 6 Ciger Light Adapter Parts List DESCRIPTION SEC CODE REMARK Ciger Light Adapter GH44 00040A BLACK ...

Page 8: ...1 5 Exploded Views and Parts List TEST JIG GH80 10508A TEST JIG CABLE GH39 00081A RF JIG CABLE GH39 00002A 1 7 Test Jig ...

Page 9: ...Exploded Views and Parts List 1 6 DC POWER SUPPLY 232 CABLE TEST JIG CABLE RF JIG CABLE 8922 or 8960 WIRELESS COMMUNICATION TEST SET Note PC 1 7 1 Test Jig ...

Page 10: ...1 7 Exploded Views and Parts List 1 8 Earphone EARPHONE GH59 00225A 1 9 Data Kit DATA KIT GH39 30533A ...

Page 11: ...Exploded Views and Parts List 1 8 1 10 Desk Top Charger DESK TOP CHARGER GH44 00206A ...

Page 12: ...2 1 PCB Diagrams Schematic Diagrams 2 PCB Diagrams 2 1 Main Top ...

Page 13: ...2 2 PCB Diagrams Schematic Diagrams 2 2 Main Bottom ...

Page 14: ...005Ó GRM36COG101J50PT 19 C129 2203 000233 ÒC CERAMIC CHIP 0 1nF 5 50V NP0 TP 1005Ó GRM36COG101J50PT 20 C134 2203 000812 ÒC CERAMIC CHIP 0 033nF 5 50V NP0 TP 1005Ó GRM36COG330J50PT 21 C135 2203 000233 ÒC CERAMIC CHIP 0 1nF 5 50V NP0 TP 1005Ó GRM36COG101J50PT 22 C138 2203 000233 ÒC CERAMIC CHIP 0 1nF 5 50V NP0 TP 1005Ó GRM36COG101J50PT 23 C141 2203 000812 ÒC CERAMIC CHIP 0 033nF 5 50V NP0 TP 1005Ó G...

Page 15: ... 2203 000254 ÒC CERAMIC CHIP 10nF 10 16V X7R TP 1005 Ó GRM36X7R103K16PT 59 C201 2203 000812 ÒC CERAMIC CHIP 0 033nF 5 50V NP0 TP 1005Ó GRM36COG330J50PT 60 C204 2404 001162 ÒC TA CHIP 47uF 20 4V LZ TP 3216Ó F950G476MAAJZTQ2 61 C205 2203 005061 ÒC CERAMIC CHIP 100nF 80 20 16V Y5V TP 1005Ó GRM36V5V104Z16PT 62 C208 2404 001105 ÒC TA CHIP 10UF 20 6 3V GP TP 2012Ó TAJB106M006R 63 C211 2203 000254 ÒC CER...

Page 16: ...4 ÒDIODE SCHOTTKY HSMS 2805 70V 15mA SOT 143 TPÓ HSMS 2805 L31 101 F102 2901 001116 ÒFILTER EMI SMD 50V 0 3A 470pF 2x1 25x0 5mm TPÓ NFM39R12C471T1 102 F103 2901 001116 ÒFILTER EMI SMD 50V 0 3A 470pF 2x1 25x0 5mm TPÓ NFM39R12C471T1 103 F302 2904 001228 ÒFILTER SAW 1 8425GHz 1805 1880MHz 1dB TP 1805 18Ó B4133 104 F303 2904 001226 ÒFILTER SAW 942 5MHz 35MHz 925 960MHz 2dB TP 925 96Ó B4121 105 F305 29...

Page 17: ...HIETD2201F 142 R125 2007 000141 ÒR CHIP 2 2Kohm 5 1 16W DA TP 1005Ó ERJ2GEJ222X 143 R126 2007 007317 ÒR CHIP 2 2Kohm 1 1 16W DA TP 1005Ó RK73HIETD2201F 144 R130 2007 007318 ÒR CHIP 1Kohm 1 1 16W DA TP 1005Ó RK73HIETD1001F 145 R132 2007 007771 ÒR CHIP 0OHM 5 1 16W DA TP 1005Ó ERJ2GEJ0R0E 146 R133 2007 007771 ÒR CHIP 0OHM 5 1 16W DA TP 1005Ó ERJ2GEJ0R0E 147 R134 2007 007318 ÒR CHIP 1Kohm 1 1 16W DA ...

Page 18: ...EJ0R0E 184 R302 2007 007771 ÒR CHIP 0OHM 5 1 16W DA TP 1005Ó ERJ2GEJ0R0E 185 R310 2007 000242 ÒR CHIP 1 5Kohm 5 1 16W DA TP 1005Ó ERJ2GEJ152X 186 R311 2007 007771 ÒR CHIP 0OHM 5 1 16W DA TP 1005Ó ERJ2GEJ0R0E 187 R318 2007 001320 ÒR CHIP 1 8Kohm 5 1 16W DA TP 1005Ó ERJ2GEJ182X 188 R321 2007 000147 ÒR CHIP 8 2Kohm 5 1 16W DA TP 1005Ó RC1005J822CS 189 R322 2007 001319 ÒR CHIP 1 2Kohm 5 1 16W DA TP 10...

Page 19: ...T 809 SOT 23 3P PLASTIC 0 3 6 Ó MAX809REUR T 223 U113 1001 001145 ÒIC ANALOG SWITCH MAX4599EXT SC70 6P 49MIL SINGLEÓ MAX4599EXT T 224 U114 0505 001332 ÒFET SILICON FDG6301 N 25V 0 22A 4OHM 3W SC70 6Ó FDG6301N 225 U115 1001 001145 ÒIC ANALOG SWITCH MAX4599EXT SC70 6P 49MIL SINGLEÓ MAX4599EXT T 226 U116 1203 002077 ÒIC VOLTAGE REGULATOR 2985 SOT 23 5P 63MIL PLASTIC Ó LP2985AIM5 3 3 227 U118 1202 001...

Page 20: ...006R 20 C154 2203 000679 ÒC CERAMIC CHIP 0 027nF 5 50V NP0 TP 1005Ó GRM36COG270J50PT 21 C156 2203 000679 ÒC CERAMIC CHIP 0 027nF 5 50V NP0 TP 1005Ó GRM36COG270J50PT 22 C162 2203 000254 ÒC CERAMIC CHIP 10nF 10 16V X7R TP 1005 Ó GRM36X7R103K16PT 23 C166 2203 005061 ÒC CERAMIC CHIP 100nF 80 20 16V Y5V TP 1005Ó GRM36V5V104Z16PT 24 C175 2203 005061 ÒC CERAMIC CHIP 100nF 80 20 16V Y5V TP 1005Ó GRM36V5V1...

Page 21: ...K50PT 61 C328 2203 000359 ÒC CERAMIC CHIP 0 15nF 5 50V NP0 TP 1005Ó GRM36COG151J50PT 62 C330 2203 000438 ÒC CERAMIC CHIP 1nF 10 50V X7R TP 1005 Ó GRM36X7R102K50PT 63 C331 2203 000233 ÒC CERAMIC CHIP 0 1nF 5 50V NP0 TP 1005Ó GRM36COG101J50PT 64 C332 2203 000233 ÒC CERAMIC CHIP 0 1nF 5 50V NP0 TP 1005Ó GRM36COG101J50PT 65 C339 2203 000679 ÒC CERAMIC CHIP 0 027nF 5 50V NP0 TP 1005Ó GRM36COG270J50PT 6...

Page 22: ...0 TP 1005Ó GRM36COG101J50PT 103 C408 2203 000233 ÒC CERAMIC CHIP 0 1nF 5 50V NP0 TP 1005Ó GRM36COG101J50PT 104 C412 2203 000812 ÒC CERAMIC CHIP 0 033nF 5 50V NP0 TP 1005Ó GRM36COG330J50PT 105 CN101 3710 001105 ÒCONNECTOR SOCKET 2P 1R 1 27mm SMD S AUÓ 24 8005 002 000 867 106 CN102 3709 001121 ÒCONNECTOR CARD EDGE 6P 2 54MM SMD S AUÓ 1 338063 9 107 CN103 3710 001492 ÒCONNECTOR SOCKET 40P 2R 0 5MM SM...

Page 23: ... DIGITAL DTB113ZK PNP 200MW 10K SC 59 TPÓ DTB113ZK 145 Q303 0504 000167 ÒTR DIGITAL RN1102 NPN 100MW 10K 10K SSM TPÓ DTC114EE TR 146 R117 2007 007142 ÒR CHIP 10Kohm 1 1 16W DA TP 1005Ó RK73H1ETP1002F 147 R118 2007 007008 ÒR CHIP 300OHM 5 1 16W DA TP 1005Ó RC1005J301CS 148 R119 2007 000162 ÒR CHIP 100Kohm 5 1 16W DA TP 1005Ó RC1005J104CS 149 R124 2007 000140 ÒR CHIP 1Kohm 5 1 16W DA TP 1005Ó ERJ2GE...

Page 24: ...ETD2202F 188 R336 2007 000148 ÒR CHIP 10Kohm 5 1 16W DA TP 1005Ó RC1005J103CS 189 R338 2007 007313 ÒR CHIP 6 8Kohm 1 1 16W DA TP 1005Ó RK73HIETD6801F 190 R339 2007 007313 ÒR CHIP 6 8Kohm 1 1 16W DA TP 1005Ó RK73HIETD6801F 191 R340 2007 007313 ÒR CHIP 6 8Kohm 1 1 16W DA TP 1005Ó RK73HIETD6801F 192 R341 2007 007313 ÒR CHIP 6 8Kohm 1 1 16W DA TP 1005Ó RK73HIETD6801F 193 R342 2007 000143 ÒR CHIP 4 7Ko...

Page 25: ... 14V 1 6x0 8mm TPÓ VC060314A300R 225 ZD101 1405 001082 ÒVARISTOR 5 6V 20A 1x0 5x0 6mm TPÓ VC040205X150R 226 ZD102 1405 001082 ÒVARISTOR 5 6V 20A 1x0 5x0 6mm TPÓ VC040205X150R 227 ZD103 1405 001082 ÒVARISTOR 5 6V 20A 1x0 5x0 6mm TPÓ VC040205X150R 228 ZD104 1405 001082 ÒVARISTOR 5 6V 20A 1x0 5x0 6mm TPÓ VC040205X150R 229 ZD105 1405 001082 ÒVARISTOR 5 6V 20A 1x0 5x0 6mm TPÓ VC040205X150R 230 ZD106 14...

Page 26: ...AVcc LDO Vcc LDO ALERT_VCC LDO Serial Data Interface I O Interface A D Interface AGC AFC PLL DC DC CONVERTER Charging Circuit Li Ion Battery Slim Standard Long ONE C VIBRATOR SYSTEM CLOCK 13MHz SRAM FLASH1 FLASH2 EEPROM RTC_CLOCK 32 768KHz KEY_BOARD SIM CARD SPEAKER MIC LCD BB INTERFACE RF INTERFACE Base Band Block Diagram of SGH N300 ...

Page 27: ...0MHz E GSM 540MHz I Q Mod E GSM 270MHz DCS 135MHz Phase Detector Loop filter E GSM 270MHz DCS 135MHz Baseband Block 880 915MHz 1710 1785 MHz Tx Dual VCO APC Circuit Mixer 2 Serial data interface 45MHz 270MHz 2 E GSM 1150 1185MHz DCS 1580 1655MHz I I Q Q I Q Demo I I Q Q CLK SDATA LE bias circuit Mixer 1 RF VCO Rx SAW filter 2 Rx SAW filter 540MHz Dual Directional Coupler E GSM 1150 1185MHz DCS 157...

Page 28: ...1 SI4133 MLP28 U302 VCTCXO 13MHz U303 IF VCO 1080MHz PLL1 PLL2 RF VCO AFCDAC 10 23 15 880 915MHz EGSM 890 915MHz PGSM 1710 1785MHz DCS U305 HD155128TF Antenna S W U304 U108 VP40575 TXEN RAMPDAC BAND Selection GSM Low DCS High ITXP ITXN QTXP QTXN Loop Filter TX VCO OSC301 Dual PAM U312 APC Circuit 880 915 MHz 1710 1785 MHz Coupler 15 9 1 3 7 5 U318 8 13 7 2 1080 MHz DCS 1575 1650 MHz Tx E GSM 1150 ...

Page 29: ... 40 41 27 SDATA SCLK SYNEN1 46dBm 947 467 MHz E GSM 62CH 50dBm 1842 467 MHz DCS 698CH 47dBm 30dBm 33dBm 38dBm 52dBm 43dBm 9dBm 1172 4 MHz 9 5dBm 1617 4 MHz GSM 1150 1185 MHz DCS 1580 1655 MHz 8dBm 1080MHz 24 4dBm G 29dBm D 224 933 MHz 31dBm G 35dBm D 22dBm G 25dBm D 45 067 MHz 50dBm G 54dBm D 67 kHz 26 25 24 33 32 44 43 4 2 6 10 SI4133 MLP28 U302 VCTCXO 13MHz U303 IF VCO 1080MHz PLL1 PLL2 RF VCO A...

Page 30: ...ce Keypad When the END key is pressed the voltage of D107 pin3 3 6V No Yes U117 pin10 3 2V Check the circuit related to U117 No END U119 pin 5 3 0 V Check the circuit related to U119 No Yes Check the initial operation U110 pin5 3 0 V Check U110 and related circuit No Yes Check for the clock signal at R301 C302 Check the clock generation circuit related to U301 and U303 No Yes Yes ...

Page 31: ...R101 C209 100UF 6 3V 10UF 6 3V C196 RB414 BAT101 R164 200 C190 100PF 1UF C214 GND 2 NC 4 ON OFF 3 VIN 1 5 VOUT 2 GND NC 4 ON OFF 3 VIN 1 VOUT 5 U110 LP2981AIM5X 3 0 LP2981AIM5X 3 0 U119 C156 27PF C211 10NF 10UF 10UF 6 3V C185 10NF C208 10UF 6 3V C198 10NF C162 C191 3 ON OFF 1 VIN VOUT 5 LP2985AIM5 3 0 U122 BYPASS 4 2 GND C103 100NF C110 1UF LP2985AIM5 3 3 U116 BYPASS 4 2 GND 3 ON OFF 1 VIN VOUT 5 ...

Page 32: ...ng SW is OK Is CSROM signal OK The node between R162 and C183 H RST No Check the circuit related to reset R114 H BOOT No Resolder R114 Yes R150 H GPIO4 No Resolder R150 Yes R165 L GPIO2 No Resolder R165 Yes Replace PBA Check all the other connection by Test S W Check the circuit around LCD Check the circuit around U107 EEPROM and data stored in it Yes ...

Page 33: ... Chart of Troubleshooting 5 4 U108 U112 U109 VCC VCC R162 C183 R114 R150 R156 VCC GPIO4 SIMPWDN_BOOT F_WP F_WP F_VCCW SYSRST GPIO3 GPIO4 DTR1 Q108 R163 CSROM _F_BE0 _F_BE1 GPIO11 R197 YO E A Y1 VCC VCC U103 ...

Page 34: ...ormal charging part Replace TA Check the CN104 pin 14 15 9 0 V No Yes Yes Check the U105 pin 14 15 9 0 V Resolder C111 C217 C105 FB102 FB101 Yes No R131 CHG_ON side L Resolder R131 Yes No Resolder components around U105 Check the U105 pin 10 4 2V END Yes No ...

Page 35: ... 10UF 6 3V 10K FB101 BLM11P600SPT C131 R194 12K 1 18K 1 R193 10uH L104 100NF C125 3 3UF 16V DTC144EE TR Q105 1 3 2 C105 BLM11P600SPT FB102 Q106 DTC144EE TR 1 3 2 3 3UF C217 82K 1 R129 16V CRS04 TE85L D111 1UF C120 C108 100NF 5 OVP PROG 13 7 SENSE SW 2 VC 12 14 VCC1 15 VCC2 BOOST 3 GND1 1 GND2 4 8 GND3 9 GND4 GND5 16 6 NC1 11 NC2 DCVOLT U105 LT1510 5CGN TR 10 BAT CHG_ON MAX4 2 VBATT BAT_VOLT ...

Page 36: ...ROM and data stored in it Yes Phone can t access SIM card Yes U101 pin 2 3 3 0 V Replace U101 or Resolder C107 C109 Yes No After Power ON Check SIMCLK Signal on CN102 pin 3 in a few second After SIM card insert CN102 pin 2 H SIMRST CHECK C409 Replace PBA CHECK C410 Replace PBA Yes No No U101 pin4 3 0 V Yes No Check the circuit around U101 ...

Page 37: ... C101 2 CN102 2 1 338063 9 2 SIM CONNECTOR CN102 4 5 3 1 6 FDG6323L C109 10K R103 10PF CN102 5 1 338063 9 7 CN102 6 NC C410 C409 NC 100PF C408 100PF C407 1 338063 9 CN102 3 3 CN102 4 1 338063 9 6 5 ON OFF R1 C1 6 R2 1 2 V C1 1 3 V C1 2 4 VIN R1 VCC 1 338063 9 1 U101 FDG6323L 10UF 6 3V 10NF C107 ...

Page 38: ...s not work Resoler J101 J101 pin 4 5 short U110 pin 5 AVCC 3 0V Check the circuit from U108 to MIC Check the circuit related to U110 END Resolder the R177 R176 R174 R175 C188 C187 C189 U115 U113 ZD112 ZD109 Yes No Yes Yes Yes No No Check CN103 Replace LCD_KEY_PAD No Yes ...

Page 39: ...Flow Chart of Troubleshooting 5 10 J101 MIC ON KEY_PAD U108 VX1P VX1N MIC MIC 1 5 4 MIC MIC RC FILTER ...

Page 40: ... 5 6 Speaker Part Speaker does not work Yes J101 pin 2 3 short Resoler J101 J101 pin 2 3 6 1 5 V No No Replace the PBA Yes Yes Modify the SPK pins Check the tension of the Speaker Is Speaker working Replace the Speaker END No Yes Yes No ...

Page 41: ...Flow Chart of Troubleshooting 5 12 J101 SPK101 U110 PWO1P PWO1N SPK SPK 6 2 3 SPK SPK ...

Page 42: ...5 13 Flow Chart of Troubleshooting 5 7 Key Data Input Check Initial operation Replace the Keypad When one of the keys is pushed is it displayed on LCD Keypad is OK END Replace the PBA Yes No Yes Yes No ...

Page 43: ...Test S W Is there alert wave form on the R110 during alert tone test Is there alert wave form on the Q102 pin 3 during alert tone test U116 pin 5 3 3V Check the circuit related to Q102 END Check the circuit related to U116 Yes No Yes Yes No No Buzzer is ok Change the Buzzer Yes No ...

Page 44: ...From_IC 2 1 3 DAN222TL D104 100K R109 RFGND 4 7K R110 1 3 2 C102 100NF 2SD2114KT146V Q102 5 15 Flow Chart of Troubleshooting ...

Page 45: ...work Check the circuit related to U116 U116 pin 5 3 3V Is Green color of 3 LEDs correctly working Is Red color LED of 3 LEDs correctly working Check Q112 R112 LED1 END Check Q101 R102 LED1 Yes No Yes Yes No No Is Blue color LED of 3 LEDs correctly working No Check Q104 R111 LED2 Yes ...

Page 46: ...R YG D LED1 RI_BLUE RI_GREEN RTC_3V3 VBATT DTC114YE 2 3 1 Q101 LED2 SLS NNBD102TS 100 5 R111 0 R198 R102 47 5 RI_RED NC R113 Q112 DTC114YE 2 3 1 2 3 1 R112 24 5 DTC114YE Q104 5 17 Flow Chart of Troubleshooting ...

Page 47: ... menu R141 R179 H GPO1 by test S W No Yes Yes No ResolderR141 R149 R139 R145 R148 or replace Q107 Q107 pin 3 L LCD backlight on Replace LCD No Yes No LCD BACKLIGHT EL_Backlight Resolder R179 C199 U121 pin 5 H No Yes Yes END U121 pin 4 3 3V Resolder U122 C200 C196 No U121 pin 7 150V Resolder L103 Q110 No Is it working Replace LCD No ...

Page 48: ...5 19 Flow Chart of Troubleshooting Q107 U108 R141 R149 KeyPAD LED GPO1 1 2 4 C213 8 7 5 R179 C199 EL U121 Q110 ALERT_Vcc R139 R143 R145 R148 L103 ...

Page 49: ...older J301 Resolder U304 Pin 9 65 dBm Check VC1 L VC2 L VC3 H Resolder F304 Resolder C341 L317 L316 C336 C333 Resolder F303 L323 L324 Check C301 CH 225MHz 20 dBm C315 1080MHz 20 dBm Resolder U302 Resolder F301 C309 C310 C313 C314 C318 C312 L308 R309 U305 Pin 24 25 26 27 40 mV Resolder OneC U108 U305 Check U305 Pin 32 33 2 5 V Pin 35 0 5 V Resolder U305 Pin35 Pin 32 33 Resolder U108 No No No No No ...

Page 50: ...3 L Change or Resolder U304 Resolder U318 C353 Resolder or Change R334 R335 R364 R366 Resolder OSC301 R343 U305 pin 30 47 10 dBm Resolder U305 U302 U305 Pin 17 18 19 20 40 mV Resolder OneC U108 Check U305 Pin 38 2 5 V Pin 35 0 5 V Resolder U305 Pin35 Pin38 Resolder U108 No No No No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Check Ant S W Control Circuit Check U312 VBATT Pin 2 APC OK...

Page 51: ...r J301 Resolder U304 Pin 16 65 dBm Check VC1 L VC2 L VC3 H Resolder F305 Resolder F302 C331 C332 Check C301 CH 225MHz 20 dBm C315 1080MHz 20 dBm Resolder U302 U305 Pin 24 25 26 27 40 mV Resolder OneC U108 U305 Check U305 Pin 32 33 2 5 V Pin 35 2 5 V Resolder U305 Pin 35 Pin 32 33 Resolder U108 No No No No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Resolder C350 L319 C354 L318 L3...

Page 52: ...2 H VC3 L Change or Resolder U304 Resolder U318 C364 Resolder or Change R346 R363 R365 Resolder OSC301 R343 U305 pin 30 47 10 dBm Resolder U305 U302 U305 Pin 17 18 19 20 40 mV Resolder OneC U108 Check U305 Pin 38 Pin 35 2 5 V Resolder U305 Pin35 Pin38 Resolder U108 No No No No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Check Ant S W Control Circuit Check U312 VBATT Pin 2 APC OK Reso...

Page 53: ...UT 29 GND4 GND5 30 31 GND6 GND7 32 18 GNDD 16 GNDD1 GNDD2 14 22 SI4133 MLP28 U302 12 RFGND 10nH L304 0 R311 R301 RFGND R302 0 3 3K 100NF C303 C316 100NF 1K R308 R305 1K 10NF C306 RFGND RFGND RFGND VC 1 4 VCC 10 R312 U303 KT16 KEU30L 13 000M GND 2 OUT 3 RFGND 10K R303 C320 10NF C308 RFGND R313 1K 100NF 10NF C319 75K R304 C301 560PF 1NF RFGND 100NF C304 RFGND C307 R310 1 5K 2 2nH L301 560PF C315 5 6...

Page 54: ...U305 HD155128TF 35 BAND 56 RFGND NC C367 C350 7PF RFGND 7PF C341 3 3PF C318 RFGND RFGND RFGND C331 100PF NC L324 22nH L322 NC C342 C344 1NF C379 8 2PF R315 RFGND RFGND 1K NC 1NF C349 C324 1NF C403 RFGND C313 20PF 100 5 10PF C387 RFGND RFGND 100 R345 82 R331 R325 47 C335 1 3 G G 4 6 G IN 2 OUT 5 5 6pF 12PF C309 B4144 F305 G 27PF C345 C348 RFGND 18PF RFGND R369 22 47nH L306 L319 2 7nH C326 1NF C366 ...

Page 55: ...15 E2 RFGND 560 R324 U310 BCR08PN 2 B1 5 B2 C1 6 3 C2 E1 1 4 1NF C382 33nH L314 RFGND RFGND ANT301 3198 17 L325 33nH 1608 100PF C404 C352 1 8NF RFGND C357 820PF R335 15 33PF C364 10NF C402 RFGND RFGND RFGND 33PF C334 RFGND 33PF C377 C323 820PF 3VTXEN1 2 7K R362 RFGND 3 9K 1 R361 RFGND NC C372 0 R358 1 2K R322 R329 1 8K R318 27PF C369 RFGND 680 R347 10K 1K R327 8 2K R321 VC1 VC2 14 11 VC3 100PF C34...

Page 56: ...RFGND U315 1UF C363 10UF 6 3V 10UF 6 3V C370 3 1 RFGND RFGND 10NF C376 1 Q303 DTC114EE TR 2 RFGND Q302 DTB113ZK 2 3 RFGND RFGND RFGND RFGND RFGND 100NF C388 GND 2 4 NC 3 ON OFF 1 VIN 5 VOUT 10NF U311 LP2981AIM5X 3 0 C384 C389 C398 RFGND 10UF 6 3V 2 V C1 2 3 VIN R1 4 10UF 6 3V RFGND FDG6323L U308 ON OFF 5 6 R1 C1 1 R2 V C1 1 C375 100NF U307 BYPASS 4 2 GND 3 ON OFF 1 VIN VOUT 5 RFGND 100UF C381 LP29...

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