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Samsung SGH-P738 Service Manual

Gsm telephone
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GSM TELEPHONE
GSM TELEPHONE
SGH-P738
1.
Specification
2.
Flow Chart of Troubleshooting
3.
Exploded Views and Parts List
4.
Electrical Parts List
5.
PCB Diagrams
6.
Block Diagrams
CONTENTS

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Summary of Contents for Samsung SGH-P738

  • Page 1 GSM TELEPHONE SGH-P738 GSM TELEPHONE CONTENTS Specification Flow Chart of Troubleshooting Exploded Views and Parts List Electrical Parts List PCB Diagrams Block Diagrams...
  • Page 2 ⓒ Samsung Electronics Co.,Ltd. Nov. 2004 Printed in South Korea. This Service Manual is a property of Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable Code No.: GH68-06167A International and/or domestic law. BASIC.

  • Page 3: Specification

    1. SGH-P738 Specification 1. GSM General Specification GSM900 EGSM 900 DCS 1800 Phase 1 Phase 2 Phase 1 Freq. Band [MHz] 890~915 880~915 1710~1785 Uplink/Downlink 935~960 925~960 1805~1880 ARFCN range 1~124 0~124 & 975~1023 512~885 Tx/Rx spacing 45MHz 45MHz 95MHz Mod.

  • Page 4: Gsm Tx Power Class

    SGH-P738 Speclflcation 2. GSM Tx Power Class Tx Power Tx Power GSM900 DCS1800 control level control level 33 ± 3 dBm 30±3 dBm 28±3 dBm 31 ± 3 dBm 26±3 dBm 29 ± 3 dBm 24±3 dBm 27 ± 3 dBm 22±3 dBm...

  • Page 5: Flow Chart Of Troubleshooting

    2. SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 1. Power On 'Power ON' does not work check the current consumption more Download again than 100mA Check the Voltage of the Battery more Charge the battery than 3.5V Check Check the pin11 of...
  • Page 6 SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 2. Initial Initial Failure Check the signal at the pin 21 of U101 is Check U401 "High" when the phone is boot on Check pull_up R603,pin39 of U101, Check pin4 of OSC402 Voltage is 2.8V ?

  • Page 7: Sim Part

    SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 3. Sim Part * Test with Sim Phone can't access SIM card Check the pin 1 of Check the circuit related to U101 CN104. voltage 3V? Check the SIM connector's (CN104) Resolder or change CN104...

  • Page 8: Microphone Part

    SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 4.Microphone Part * Call with Sim before testing. MicroPhone does not work Check the soldered status of microphone Resolder microphone Check the reference Resolder or change voltage on mic path R203, C209, R204, R201, R200, C201 ≒...
  • Page 9 SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 5.Directional MIC Part When you play MPEG file, if Audio is not active Directional MIC does not work Check MIC "+" terminal, Resolder R249 Bias Voltage = 2.6V? Check pin21 of U200, Resolder C244 Voltage = 1.76V?

  • Page 10: Speaker Part

    SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 6. Speaker Part * Call before testing. Receiver does not work Check the soldered Resolder Speaker status of Speaker Check U202 and the audio path of Check the pin 7 of U202 "High"?

  • Page 11: Key Data Input

    SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 7. Key Data Input Check the Initial Operation Replace or Adjust Check the Keypad & Dome Sheet the Keypad & Dome Sheet Check soldered status of CN302 and connecting Resolder CN302 or change FPCB...

  • Page 12: Lcd Backlight

    SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 8. LCD backlight Backlight does not work Backlight "ON" mode in Select backlight "ON" mode the menu? Check conecting between PBA and LCD Check FPCB conector Check the LCD Check CN304 pin 28= "high"?

  • Page 13: Gsm Receiver

    SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 9. GSM Receiver CONTINOUS RX ON RF INPUT : 62CH AMP : -50dbm Normal condition Check ANT1, C615 catch the channel ? Check F601 Resolder or change pin 1 ≥ -65 dbm...

  • Page 14: Dcs Receiver

    SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 10. DCS Receiver CONTINOUS RX ON RF INPUT : 698CH AMP : -50dbm Normal condition Check ANT1, C615 catch the channel ? Check F601 Resolder or change pin 1 ≥ -65 dbm...

  • Page 15: Pcs Receiver

    SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 11. PCS Receiver CONTINOUS RX ON RF INPUT : 660CH AMP : -50dbm Normal condition Check ANT1, C615 catch the channel ? Check F601 Resolder or change pin 1 ≥ -65 dbm...

  • Page 16: Gsm Transmitter

    SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 12. GSM Transmitter CONTINUS TX ON CONDITION TX POWER DAC : 554 CODE Check F601 Check F601 Check and APPLIED pin 3 : 2.8V ? pin 4 : about CH : 62ch...
  • Page 17 SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams 13. DCS/PCS Transmitter CONTINUS TX ON CONDITION TX POWER DAC : 560 CODE Check F601 Check F601 Check and APPLIED pin 6 : about pin 5,9 : change CH : 698CH(DCS), 2~3 dbm? 2.8V ?
  • Page 18 SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams R 156 C N 104 C 100 33PF C A M _2. 5 C A M _1. 8 VC 01_2. 5 VB A T VC C D VB A T C 101...
  • Page 19 SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams C 202 R 202 100N F AM P_I N C 204 C 205 C 206 100N F C 207 C 213 100N F R 205 C 208 R 206 10U F 10U F...
  • Page 20 SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams VC _D ( 0: 31) VC _D ( 0) AB 1 8 M 22 N 22 VC _D ( 1) VC _A( 1) N 21 VC _D ( 2) VC _A( 2)
  • Page 21 SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams VC C _1. 8A VC C D VR TC C 400 C 402 XLA TC H _C E 100N F 22N F C 401 C 403 VC C _1. 8A 27PF 10N F A ( 22) VC C _1.
  • Page 22 SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams D SP_AB( 0: 8) R 501 D SP_AB( 0) SER C K SER C LK 5. 1K D SP_AB( 1) SER D A SER D AT TXPO W ER D SP_AB( 2)
  • Page 23 SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams VR F C 600 10PF R 600 R 601 G SM _PAM _I N C 601 C 602 18PF 2. 2K 10N F 13M H Z_SI C LK 13M _TR 13M H Z_SI...

  • Page 24: Exploded Views And Parts List

    3. SGH-P738 Exploded Views and Parts List 1. Cellular phone Exploded View Q H I 03 Q W D 02 Q FR 01 Q VO 01 Q FU 01 Q M E03 Q C A01 Q C R 08 Q FB01...

  • Page 25: Cellular Phone Parts List

    SGH-P738 Exploded Views and Parts List 2. Cellular phone Parts list Location Description SEC CODE Remark QWD02 SUB WINDOW GH72-15887A QFU01 F/UPPER ASSY GH75-05347A QFB01 SUB LCD BRACKET GH75-05019A QSP01 SPEAKER 3001-001627 QMO02 MOTOR 3101-001371 QFL01 SUB F/LOWER GH75-05018A QMW02...
  • Page 26 SGH-P738 Exploded Views and Parts List 3. Test Jig (GH80-00865A) 3-1. RF Test Cable 3-2. Test Cable 3-3. Serial Cable (GH39-00090A) (GH39-00324A) 3-4. Power Supply 3-5. DATA CABLE 3-6. TC Cable (GH39-00279A) (GH44-00701A) 3- 2...

  • Page 27: Electrical Parts List

    4. SGH-P738 MAIN Electrical Parts List Design LOC SEC Code Design LOC SEC Code ZD105 0403-001387 C131,C132,C138,C144 2203-000254 D301 0404-001172 C146,C245,C309,C403 2203-000254 ZD310 0406-001150 C407,C408,C409,C410 2203-000254 ZD101,ZD102,ZD103 0406-001190 C413,C422,C425,C427 2203-000254 ZD104,ZD200,ZD303 0406-001190 C509,C510,C511,C512 2203-000254 ZD304,ZD305,ZD306 0406-001190 C513,C514,C516,C602 2203-000254 ZD309 0406-001190...
  • Page 28 SGH-P738 MAIN Electrical Parts List Design LOC SEC Code Design LOC SEC Code R334,R335 2007-000137 C308,C310,C311,C312 2203-005061 R324,R605,R110 2007-000138 C400,C404,C405,C406 2203-005061 R375,R376,R378,R379 2007-000139 C420,C507 2203-005061 R380,R381,R382,R383 2007-000139 C130,C134,C140,C141 2203-005065 R384,R385,R386,R387 2007-000139 C145,C200,C215,C506 2203-005065 R388,R389,R390 2007-000139 C631 2203-005065 R106,R107,R112 2007-000140 C111...
  • Page 29 SGH-P738 MAIN Electrical Parts List Design LOC SEC Code Design LOC SEC Code R320,R322,R323,R339 2007-000171 L602 2703-002602 R340,R341,R342,R344 2007-000171 L603 2703-002603 R345,R356,R361,R362 2007-000171 L604 2703-002636 R365,R377,R393,R394 2007-000171 OSC402 2801-003856 R395,R396,R401,R417 2007-000171 OSC201,OSC300 2801-004225 R418,R505,R506,R600 2007-000171 OSC401 2801-004318 R613,R615,R616,R617 2007-000171 OSC600...

  • Page 30: Pcb Diagrams

    5. SGH-P738 PCB Diagrams 5- 1...
  • Page 31 SGH-P738 PCB Diagrams 5- 0...

  • Page 32: Block Diagrams

    6. SGH-P738 Block Diagrams 1. RF Solution Block Diagram CSP1093 TRIDENT BASE BAND GSM LNA IN 925MHz~960MHz RXIP RXIP A D C D A C DSP_AB RXIN (0:8) RXIN DCS LNA IN 1805MHz~1880Mz CHANNEL FILTER DSP1600 RXQP RXQP A D C...

  • Page 33: Base Band Solution Block Diagram

    SGH-P738 Block Diagrams 2. Base Band Solution Block Diagram POWER X-TAL (DC/DC,CHARGER, 13MHz SIM) GPRS TRIDENT TXIP TXIN CSP1093 TXQP TXQN DSP16000 AB[8:0] RXIP RF SOLUTION DB[15:0] RXIN <RF DIRVER> - RF IC RS232 INT1 RXQP - PAM TXI/Q IRQx...

  • Page 34: Audio Part

    SGH-P738 Block Diagrams 3. AUDIO PART CSP1093 MICIN MICIN AOUTAP MICOUT AOUTAP 3.9 Ω MICOUT :15~30 Ω ) EARMIC AUXIN AUXIN AOUTAN 3.9 Ω MAINMIC AOUTAN AUXOUT AUXOUT MAX4642EUA 5V:4 Ω 3V:8 Ω DGND AGND AOUTBP AOUTBP AOUTBN :15~30 Ω )

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Sgh-p730c

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