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Samsung SGH-N300 Service Manual

Also see for SGH-N300: Owner's manual

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Contents
  1. Table Of Contents
  2. main parts list
  3. travel adapter
  4. ciger light adapter
  5. test jig
  6. data kit
  7. desk top charger
  8. main parts list top
  9. main parts list bottom
  10. main rf
  11. power on
  12. charging part
  13. sim part
  14. microphone part
  15. speaker part
  16. key data input
  17. alert tone
  18. ring indicator
  19. back light
  20. gsm receiver
  21. gsm transmitter
  22. dcs receiver
  23. dcs transmitter
  24. flow chart of troubleshooting
Samsung SGH-N300 Service Manual Manual pdf 30 page image
5. Flow Chart of Troubleshooting5-1 Power ON5-1 Flow Chart of Troubleshooting'POWER ON'does not workCharge the BatteryCheck the Battery Voltageis more than 3.2VNoYesYesReplace KeypadWhen the "END" key ispressed, the voltage of "D107 pin3"3.6V?NoYesU117, pin10 > 3.2V Check the circuit related to U117NoENDU119, pin 5 3.0 V ? Check the circuit related to U119NoYesCheck the initial operationU110, pin5 3.0 V ? Check U110 and related circuitNoYesCheck for the clock signal at R301,C302 Check the clock generation circuit(related to U301 and U303)NoYesYes
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This manual is suitable for:
SGH-N300
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