Samsung SGH-N300 Service Manual
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Samsung SGH-N300 Service Manual

Samsung SGH-N300 Service Manual

Dual band mobile cellular phone
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ELECTRONICS
SERVICE
DUAL BAND Mobile Cellular Phone
DUAL BAND Mobile
Cellular Phone
SGH-N300
Manual
CONTENTS

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Summary of Contents for Samsung SGH-N300

  • Page 1: Table Of Contents

    DUAL BAND Mobile Cellular Phone ELECTRONICS SGH-N300 SERVICE 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 ELECTRONICS Samsung Electronics Co.,Ltd. Printed in Korea 06/2001 Rev 1.0 GH68-02097A...

  • Page 3: Exploded Views And Parts List

    1. Exploded Views and Parts List Main Main Parts List Travel Adapter Travel Adapter Parts List Ciger Light Adapter Ciger Light Adapter Parts List Test Jig Earphone Data Kit 1-10 Desk Top Charger 2. PCB Diagrams Main Top Main Bottom 3.

  • Page 4: Exploded Views And Parts List

    1. Exploded Views and Parts List 1-1 Main Exploded Views and Parts List...

  • Page 5: Main Parts List

    1-2 Main Parts List SEC CODE DESCRIPTION COLOR SVC Q`TY REMARKS GH75-00757B FRONT-COVER ASSY SILVER GH72-02228B FRONT-COVER GH75-00760B FLIP-COVER ASSY GH72-02229B DUMMY-FRONT GH72-01851A REFLECTOR-LED GH74-01369A SPONGE-SPEAKER GH72-01203B WEB-KEY GH75-00350A HINGE-ASSY GH72-01852A WINDOW-LCD GH07-00070A LCD-ASSY 3003-001025 GH72-01856A SHIELD-FRONT GH75-00762A REAR-COVER ASSY D/GRAY GH72-01855A REAR-COVER...

  • Page 6: Travel Adapter

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

  • Page 7: Ciger Light Adapter

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

  • Page 8: Test Jig

    1-7 Test Jig TEST JIG GH80-10508A TEST JIG CABLE GH39-00081A RF JIG CABLE GH39-00002A Exploded Views and Parts List...
  • Page 9 1-7-1 Test Jig POWER SUPPLY 8922 or 8960 WIRELESS COMMUNICATION TEST SET RF JIG CABLE TEST JIG CABLE 232 CABLE Note PC Exploded Views and Parts List...

  • Page 10: Data Kit

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

  • Page 11: Desk Top Charger

    1-10 Desk Top Charger DESK TOP CHARGER GH44-00206A Exploded Views and Parts List...

  • Page 12: Pcb Diagrams

    2. PCB Diagrams 2-1 Main Top PCB Diagrams & Schematic Diagrams...
  • Page 13 2-2 Main Bottom PCB Diagrams & Schematic Diagrams...

  • Page 14: Electrical Parts List

    3. Electrical Parts List 3-1 Main Parts List Top REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER AU101 3002-001110 ÒBUZZER-MAGNETIC;92dB,3.6V,90mA,2630Hz,TPÓ SMT-9403ECF BAT101 4302-001119 ÒBATTERY-LI(2ND);3V,0.1MAH,-,-,3.1V,-Ó RB4141106N C101 2404-001105 ÒC-TA,CHIP;10UF,20%,6.3V,GP,TP,2012Ó TAJB106M006R C102 2203-005061 ÒC-CERAMIC,CHIP;100nF,+80-20%,16V,Y5V,TP,1005Ó GRM36V5V104Z16PT C103 2203-005061 ÒC-CERAMIC,CHIP;100nF,+80-20%,16V,Y5V,TP,1005Ó GRM36V5V104Z16PT C104 2203-005065 ÒC-CERAMIC,CHIP;1000nF,+80-20%,10V,Y5V,TP,1608Ó GRM39V5V105Z10PT C106 2203-005065...
  • Page 15 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER C165 2203-000679 ÒC-CERAMIC,CHIP;0.027nF,5%,50V,NP0,TP,1005Ó GRM36COG270J50PT C168 2203-003054 ÒC-CERAMIC,CHIP;0.009nF,0.25pF,50V,NP0,TP,1005Ó GRM36COG090C50PT C169 2203-000679 ÒC-CERAMIC,CHIP;0.027nF,5%,50V,NP0,TP,1005Ó GRM36COG270J50PT C171 2203-000254 ÒC-CERAMIC,CHIP;10nF,10%,16V,X7R,TP,1005,-Ó GRM36X7R103K16PT C173 2203-005061 ÒC-CERAMIC,CHIP;100nF,+80-20%,16V,Y5V,TP,1005Ó GRM36V5V104Z16PT C174 2203-005061 ÒC-CERAMIC,CHIP;100nF,+80-20%,16V,Y5V,TP,1005Ó GRM36V5V104Z16PT C176 2203-000254 ÒC-CERAMIC,CHIP;10nF,10%,16V,X7R,TP,1005,-Ó GRM36X7R103K16PT C177 2203-000812 ÒC-CERAMIC,CHIP;0.033nF,5%,50V,NP0,TP,1005Ó GRM36COG330J50PT C178 2203-003054 ÒC-CERAMIC,CHIP;0.009nF,0.25pF,50V,NP0,TP,1005Ó...
  • Page 16 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER C351 2203-000233 ÒC-CERAMIC,CHIP;0.1nF,5%,50V,NP0,TP,1005Ó GRM36COG101J50PT C352 2203-005138 ÒC-CERAMIC,CHIP;1.8nF,10%,50V,X7R,TP,1005,-Ó GRM36X7R182K50PT C357 2203-001221 ÒC-CERAMIC,CHIP;820pF,10%,50V,X7R,TP,1005,-Ó GRM36X7R821K50PT C361 2203-001072 ÒC-CERAMIC,CHIP;0.056nF,5%,50V,NP0,TP,1005Ó GRM36COG560J50PT C369 2203-000679 ÒC-CERAMIC,CHIP;0.027nF,5%,50V,NP0,TP,1005Ó GRM36COG270J50PT C371 2203-000679 ÒC-CERAMIC,CHIP;0.027nF,5%,50V,NP0,TP,1005Ó GRM36COG270J50PT C382 2203-000438 ÒC-CERAMIC,CHIP;1nF,10%,50V,X7R,TP,1005,-Ó GRM36X7R102K50PT C383 2203-000278 ÒC-CERAMIC,CHIP;0.01nF,0.5pF,50V,NP0,TP,1005Ó GRM36COG100D50PT C387 2203-000278 ÒC-CERAMIC,CHIP;0.01nF,0.5pF,50V,NP0,TP,1005Ó...
  • Page 17 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER Q113 0504-000167 ÒTR-DIGITAL;RN1102,NPN,100MW,10K/10K,SSM,TPÓ DTC114EE/TR Q301 0504-001012 ÒTR-DIGITAL;DTC114YE,NPN,150MW,10K/47K,EMT3,TPÓ DTC114YE R101 2007-000140 ÒR-CHIP;1Kohm,5%,1/16W,DA,TP,1005Ó ERJ2GEJ102X R102 2007-000174 ÒR-CHIP;47ohm,5%,1/16W,DA,TP,1005Ó ERJ2GEJ470X R103 2007-000148 ÒR-CHIP;10Kohm,5%,1/16W,DA,TP,1005Ó RC1005J103CS R105 2007-000148 ÒR-CHIP;10Kohm,5%,1/16W,DA,TP,1005Ó RC1005J103CS R106 2007-000148 ÒR-CHIP;10Kohm,5%,1/16W,DA,TP,1005Ó RC1005J103CS R108 2007-000143 ÒR-CHIP;4.7Kohm,5%,1/16W,DA,TP,1005Ó RC1005J472CS R109 2007-000162 ÒR-CHIP;100Kohm,5%,1/16W,DA,TP,1005Ó...
  • Page 18 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER R163 2007-000148 ÒR-CHIP;10Kohm,5%,1/16W,DA,TP,1005Ó RC1005J103CS R165 2007-000148 ÒR-CHIP;10Kohm,5%,1/16W,DA,TP,1005Ó RC1005J103CS R169 2007-000162 ÒR-CHIP;100Kohm,5%,1/16W,DA,TP,1005Ó RC1005J104CS R170 2007-000157 ÒR-CHIP;47Kohm,5%,1/16W,DA,TP,1005Ó RC1005J473CS R171 2007-000162 ÒR-CHIP;100Kohm,5%,1/16W,DA,TP,1005Ó RC1005J104CS R174 2007-000139 ÒR-CHIP;220ohm,5%,1/16W,DA,TP,1005Ó ERJ2GEJ221X R175 2007-002796 ÒR-CHIP;510ohm,5%,1/16W,DA,TP,1005Ó ERJ2GEJ511X R176 2007-002796 ÒR-CHIP;510ohm,5%,1/16W,DA,TP,1005Ó ERJ2GEJ511X R177 2007-000139 ÒR-CHIP;220ohm,5%,1/16W,DA,TP,1005Ó...
  • Page 19 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER R364 2007-001217 ÒR-CHIP;82ohm,5%,1/16W,DA,TP,1005Ó ERJ2GEJ820X R365 2007-003001 ÒR-CHIP;12OHM,5%,1/16W,DA,TP,1005Ó ERJ2GEJ120X R366 2007-002965 ÒR-CHIP;15OHM,5%,1/16W,DA,TP,1005Ó ERJ2GEJ150X R368 2007-000149 ÒR-CHIP;12Kohm,5%,1/16W,DA,TP,1005Ó RC1005J123CS R369 2007-000173 ÒR-CHIP;22ohm,5%,1/16W,DA,TP,1005Ó ERJ2GE220X R370 2007-000173 ÒR-CHIP;22ohm,5%,1/16W,DA,TP,1005Ó ERJ2GE220X RA101 2011-001344 ÒR-NETWORK;100ohm,5%,1/16W,L,CHIP,8P,TPÓ EXB28V101JX RA102 2011-001344 ÒR-NETWORK;100ohm,5%,1/16W,L,CHIP,8P,TPÓ EXB28V101JX RA103 2011-001345 ÒR-NETWORK;10Kohm,5%,1/16W,L,CHIP,8P,TPÓ...

  • Page 20: Main Parts List Bottom

    3-2 Main Parts List Bottom REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER C105 2404-000335 ÒC-TA,CHIP;3.3uF,20%,16V,GP,TP,3216Ó 293D335X0016A2T C108 2203-005061 ÒC-CERAMIC,CHIP;100nF,+80-20%,16V,Y5V,TP,1005Ó GRM36V5V104Z16PT C111 2203-000679 ÒC-CERAMIC,CHIP;0.027nF,5%,50V,NP0,TP,1005Ó GRM36COG270J50PT C112 2203-000812 ÒC-CERAMIC,CHIP;0.033nF,5%,50V,NP0,TP,1005Ó GRM36COG330J50PT C113 2203-005061 ÒC-CERAMIC,CHIP;100nF,+80-20%,16V,Y5V,TP,1005Ó GRM36V5V104Z16PT C114 2203-005061 ÒC-CERAMIC,CHIP;100nF,+80-20%,16V,Y5V,TP,1005Ó GRM36V5V104Z16PT C120 2203-005148 ÒC-CERAMIC,CHIP;100nF,10%,16V,X7R,TP,1608,-Ó GRM39X7R104K16PT C123 2203-005061...
  • Page 21 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER C222 2203-000812 ÒC-CERAMIC,CHIP;0.033nF,5%,50V,NP0,TP,1005Ó GRM36COG330J50PT C223 2203-000995 ÒC-CERAMIC,CHIP;0.047nF,5%,50V,NP0,TP,1005Ó GRM36COG470J50PT C227 2203-000812 ÒC-CERAMIC,CHIP;0.033nF,5%,50V,NP0,TP,1005Ó GRM36COG330J50PT C302 2203-000438 ÒC-CERAMIC,CHIP;1nF,10%,50V,X7R,TP,1005,-Ó GRM36X7R102K50PT C305 2203-001033 ÒC-CERAMIC,CHIP;5.6nF,10%,25V,X7R,TP,1005,-Ó GRM36X7R562K25PT C306 2203-000254 ÒC-CERAMIC,CHIP;10nF,10%,16V,X7R,TP,1005,-Ó GRM36X7R103K16PT C309 2203-000330 ÒC-CERAMIC,CHIP;0.012nF,5%,50V,NP0,TP,1005Ó GRM36COG120J50PT C310 2203-000330 ÒC-CERAMIC,CHIP;0.012nF,5%,50V,NP0,TP,1005Ó GRM36COG120J50PT C312 2203-005050 ÒC-CERAMIC,CHIP;0.0018nF,0.25pF,50V,NP0,TP,1005Ó...
  • Page 22 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER C374 2203-000254 ÒC-CERAMIC,CHIP;10nF,10%,16V,X7R,TP,1005,-Ó GRM36X7R103K16PT C375 2203-005061 ÒC-CERAMIC,CHIP;100nF,+80-20%,16V,Y5V,TP,1005Ó GRM36V5V104Z16PT C376 2203-000254 ÒC-CERAMIC,CHIP;10nF,10%,16V,X7R,TP,1005,-Ó GRM36X7R103K16PT C377 2203-000812 ÒC-CERAMIC,CHIP;0.033nF,5%,50V,NP0,TP,1005Ó GRM36COG330J50PT C378 2203-005057 ÒC-CERAMIC,CHIP;0.0082nF,0.25pF,50V,NP0,TP,1005Ó GRM36COG8R2C50PT C379 2203-005057 ÒC-CERAMIC,CHIP;0.0082nF,0.25pF,50V,NP0,TP,1005Ó GRM36COG8R2C50PT C381 2404-001134 ÒC-TA,CHIP;100UF,20%,6.3V,LZ,TP,4028Ó 595D107X06R3B2T C384 2404-001105 ÒC-TA,CHIP;10UF,20%,6.3V,GP,TP,2012Ó TAJB106M006R C386 2203-005444 ÒC-CERAMIC,CHIP;0.003nF,0.1pF,50V,NP0,TP,1005Ó...
  • Page 23 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER L303 2703-001181 ÒINDUCTOR-SMD;27nH,10%,1x0.5x0.5mmÓ LL1005-FH27NK L305 2703-001545 ÒINDUCTOR-SMD;47nH,5%,1.8x1.12x1.02mmÓ 0603CS-47NXJBC L306 2703-001545 ÒINDUCTOR-SMD;47nH,5%,1.8x1.12x1.02mmÓ 0603CS-47NXJBC L308 2703-001514 ÒINDUCTOR-SMD;68nH,5%,1.8x1.12x1.02mmÓ 0603CS-68NXJBC L310 2703-001685 ÒINDUCTOR-SMD;82nH,5%,1.7x1.14x1.02mmÓ 0603CS-82NXJBC L311 2703-001723 ÒINDUCTOR-SMD;33nH,5%,1.0x0.5x0.5mmÓ LL1005-FH33NJ L314 2703-001723 ÒINDUCTOR-SMD;33nH,5%,1.0x0.5x0.5mmÓ LL1005-FH33NJ L317 2703-001733 ÒINDUCTOR-SMD;8.2nH,5%,1x0.5x0.5mmÓ LL1005-FH8N2J L319 2703-001737 ÒINDUCTOR-SMD;2.7nH,0.3nH,1x0.5x0.5mmÓ...
  • Page 24 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER R193 2007-007135 ÒR-CHIP;18Kohm,1%,1/16W,DA,TP,1005Ó RK73H1ETP1802F R194 2007-007309 ÒR-CHIP;12Kohm,1%,1/16W,DA,TP,1005Ó RK73H1ETP1202 R195 2007-000162 ÒR-CHIP;100Kohm,5%,1/16W,DA,TP,1005Ó RC1005J104CS R196 2007-000162 ÒR-CHIP;100Kohm,5%,1/16W,DA,TP,1005Ó RC1005J104CS R301 2007-001325 ÒR-CHIP;3.3Kohm,5%,1/16W,DA,TP,1005Ó ERJ2GE332X R303 2007-000148 ÒR-CHIP;10Kohm,5%,1/16W,DA,TP,1005Ó RC1005J103CS R304 2007-007021 ÒR-CHIP;75KOHM,5%,1/16W,DA,TP,1005Ó RC1005J753CS R305 2007-000140 ÒR-CHIP;1Kohm,5%,1/16W,DA,TP,1005Ó ERJ2GEJ102X R308 2007-000140 ÒR-CHIP;1Kohm,5%,1/16W,DA,TP,1005Ó...
  • Page 25 REFERENCE SEC CODE PART DESCRIPTION VENDOR PART NUMBER U303 2809-001237 ÒOSCILLATOR-VCTCXO;13MHz,5ppm,10Kohm//10pF,TP,3V,2mÓ KT16-KEU30L-13M U304 2909-001144 ÒFILTER-DUPLEXER;942.5MHZ,897.5MHZ,1.55/1.7DB,TP,-,Ó SHS-L090DK U305 1205-001935 ÒIC-TRANSCEIVER;HD155128TF,TP,56P,-,-,3V,400mW,-20tÓ HD155128TF U307 1203-001701 ÒIC-VOLTAGE REGULATOR;2982,SOT-23,5P,-,PLASTIC,3.0VÓ LP2982AIM5X-3.0 U308 0505-001423 ÒFET-SILICON;FDG6323L,N/P,-,-,-,0.3W,SC70-6Ó FDG6323L U311 1203-001454 ÒIC-VOLTAGE REGULATOR;2981,SOT-23,5P,59MIL,PLASTIC,Ó LP2981AIM5X-3.0 U312 1201-001689 ÒIC-POWER AMP;08107,-,8P,-,DUAL,34dB,-,4.5V,-,-30toÓ PF08107B-TB-CAS U313 0801-002397 ÒIC-CMOS LOGIC;7W08,AND GATE,SSOP,8P,110MIL,DÓ...

  • Page 26: Block Diagrams

    4. Block Diagrams 4-1 Main Base Band Block Diagrams...

  • Page 27: Main Rf

    4-2 Main RF Block Diagrams...
  • Page 28 4-2-1 RF Transmit Part Block Diagrams...
  • Page 29 4-2-2 RF Receive Part Block Diagrams...

  • Page 30: Flow Chart Of Troubleshooting

    5. Flow Chart of Troubleshooting 5-1 Power ON 'POWER ON'does not work Check the Battery Voltage Charge the Battery is more than 3.2V When the "END" key is pressed, the voltage of "D107 pin3" Replace Keypad 3.6V? U117, pin10 > 3.2V Check the circuit related to U117 U119, pin 5 3.0 V ?
  • Page 31 Flow Chart of Troubleshooting...
  • Page 32 5-2 Initial Initial Failure After power on, Downloading SW is OK ? check and repair the important (Is CSROM signal OK ?) signals of U108 as follows The node Check the circuit between R162 and C183 related to reset = "H" (RST) R114 = "H"...
  • Page 33 U109 U108 U103 U112 Q108 GPIO11 _F_BE0 F_WP R162 R197 F_VCCW R156 SYSRST C183 CSROM R163 _F_BE1 R150 GPIO4 GPIO4 R114 SIMPWDN_BOOT GPIO3 F_WP DTR1...

  • Page 34: Charging Part

    5-3 Charging Part Abnormal charging part Check the CN104 pin 14,15 9.0 V ? Replace TA Resolder Check the U105, pin 14,15 9.0 V ? C111,C217,C105,FB102,FB101 R131(CHG_ON side) = "L" ? Resolder R131 Resolder components around Check the U105, pin 10 4.2V ? U105 Flow Chart of Troubleshooting...
  • Page 35 Flow Chart of Troubleshooting...

  • Page 36: Sim Part

    5-4 Sim Part Phone can't access SIM card U101 pin4 = 3.0 V ? Check the circuit around U101 Replace U101 or U101 pin5 = "H" ? Replace PBA Replace U101 or U101 pin 2, 3 = 3.0 V ? Resolder C107,C109 After Power ON, CHECK C409...
  • Page 37 100PF C408 100PF C407 C409 C410 Flow Chart of Troubleshooting...

  • Page 38: Microphone Part

    5-5 Microphone Part Microphone does not work J101 pin 4, 5 = short? Resoler J101 U110 pin 5 (AVCC) 3.0V? Check the circuit related to U110 Resolder the Check the circuit R177,R176,R174,R175 from U108 to MIC C188,C187,C189,U115,U113 ZD112,ZD109 Check CN103 Replace LCD_KEY_PAD Flow Chart of Troubleshooting...
  • Page 39 Flow Chart of Troubleshooting 5-10...

  • Page 40: Speaker Part

    5-6 Speaker Part Speaker does not work J101 pin 2, 3 = short Resoler J101 J101 pin 2, 3, 6 1.5 V ? Replace the PBA Check Modify the SPK pins the tension of the Speaker Is Speaker working? Replace the Speaker 5-11 Flow Chart of Troubleshooting...
  • Page 41 J101 SPK101 U110 SPK+ PWO1P SPK+ SPK- PWO1N SPK-...

  • Page 42: Key Data Input

    5-7 Key Data Input Check Initial operation When one of the keys is pushed, Replace the Keypad is it displayed on LCD Keypad is OK ? Replace the PBA 5-13 Flow Chart of Troubleshooting...

  • Page 43: Alert Tone

    5-8 Alert Tone Abnormal Alert tone Is there alert wave form on the ALERT by Test S/W R110 during alert tone test? Is there alert wave form on the Check the circuit related to Q102 Q102 pin 3 during alert tone test? U116 pin 5 3.3V?
  • Page 44 5-15 Flow Chart of Troubleshooting...

  • Page 45: Ring Indicator

    5-9 Ring Indicator Ring Indicator LED does not work U116, pin 5 3.3V? Check the circuit related to U116 Is Green color of Check Q112,R112,LED1 3 LEDs correctly working? Is Red color LED of Check Q101,R102,LED1 3 LEDs correctly working? Is Blue color LED of Check Q104,R111,LED2 3 LEDs correctly working?
  • Page 46 R113 +VBATT R198 RTC_3V3 LED2 LED1 SLS-NNBD102TS CL-165HR/YG-D R111 100,5% Q104 RI_BLUE DTC114YE R112 24,5% Q112 RI_GREEN DTC114YE R102 47,5% Q101 RI_RED DTC114YE 5-17 Flow Chart of Troubleshooting...

  • Page 47: Back Light

    5-10 Back Light Backlight does not work Backlight "ON" mode Select backlight "ON" mode in the menu? R141,R179 = "H" ? GPO1 by test S/W LCD BACKLIGHT EL_Backlight ResolderR141,R149,R139,R145,R148 Q107 pin 3 = "L" ? or replace Q107 LCD backlight on ? Replace LCD Resolder R179,C199 U121 pin 5 = "H"...
  • Page 48 5-19 Flow Chart of Troubleshooting...

  • Page 49: Gsm Receiver

    5-11 GSM Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U304 Resolder Pin 2 J301 -65 dBm Check U304 Resolder & VC1 : L U304 Pin 9 Pin 9 VC2 : L -65 dBm -65 dBm VC3 : H...

  • Page 50: Gsm Transmitter

    5-12 GSM Transmitter Tx On (level : 5) U304 Resolder Pin 2 J301 30 dBm Check U304 VC1 : H Change or Resolder Pin 7 VC2 : L U304 30 dBm VC3 : L Check Ant. S/W Control Circuit U318 Resolder Pin 1 U318, C353...

  • Page 51: Dcs Receiver

    5-13 DCS Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U304 Resolder Pin 2 J301 -65 dBm Check U304 Resolder & VC1 : L U304 Pin 16 Pin 16 VC2 : L -65 dBm -65 dBm VC3 : H...

  • Page 52: Dcs Transmitter

    5-14 DCS Transmitter Tx On (level : 0) U304 Resolder Pin 2 J301 25 dBm Check U304 VC1 : L Change or Resolder Pin 13 VC2 : H U304 25 dBm VC3 : L Check Ant. S/W Control Circuit U318 Resolder Pin 3 U318, C364...
  • Page 53 GNDR3 GNDR1 SDAT SCLK RFOUT VDDR SENB AUXOUT VDDI PWDNB IFOUT GNDD2 GNDI GND6 Flow Chart of Troubleshooting 5-24...

  • Page 54: Flow Chart Of Troubleshooting

    43 MIX2OUTB GNDIFLO 44 MIX2OUT IOUT VCCIF IOUTB 46 GNDIF QOUT C374 10NF 47 RFLOIN QOUTB 48 VCCRELO GNDIQ 49 MIX1OUT VCCIQ C373 50 MIX1OUTB RESET 51 VCCMIX 52 GNDMIX IINB 53 MIX1GSMIN C324 54 MIX1GSMINB QINB 55 LE ICURAD C325 PLLOUT C326...
  • Page 55 G9 17 G7 15 G5 13 G3 11 G1 9 Flow Chart of Troubleshooting 5-26...
  • Page 56 5-27 Flow Chart of Troubleshooting...

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