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Samsung SGH-J400 Service Manual

Also see for SGH-J400: User guideUser guide

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Contents
  1. Safety Precautions
  2. gsm general specification
  3. gsm tx power class
  4. Product Function
  5. Array course control
  6. Exploded View and Parts List
  7. cellular phone parts list
  8. Main Electrical Parts List
  9. Block Diagrams
  10. PCB Diagrams
  11. Flow Chart of Troubleshooting
  12. sim part
  13. speaker part
  14. microphone part
  15. key data input
  16. lcd back light
  17. camera part
  18. charging part
  19. gsm receiver
  20. gsm transmitter
  21. dcs receiver
  22. dcs transmitter
  23. pcs receiver
  24. pcs transmitter
  25. wcdma receiver
  26. wcdma transmitter
  27. Reference data
  28. Disassembly and Assembly
  29. assembly instructions
Samsung SGH-J400 Service Manual Manual pdf 52 page image
SAMSUNG Proprietary-Contents may change without noticeThis Document can not be used without Samsung's authorizationFlow Chart of Troubleshooting9-209-14. PCS TransmitterENDCheck U200Check VBAT or PAMcontrol signalNoChange or Resolder U103YesU103 pin19≥ 25dBm Resolder RFS101,C112,L103TX ON (5Level)VDD = H (2.5V),VC1 = 1.5VVC2, VC3= 0U103 pin22≥ 25dBmPAM100 pin17≥ 25dBmPAM100 pin1≥ -4dBmCheck ANT Switchcontrol circuitResolder or Change R107YesCheck PAM100pin2,3,4,5,8 is ok? Resolder or Change PAM100NoNoNoNoYesYesYesYesNoYes
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This manual is suitable for:
SGH-J400
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