The first step checks the power suppliers, whether the phone is dead in the Hw or Sw. How:
Connect the cable from the power supply connector to the battery of the phone at least 3 cable, the order negatip, BSI and positive. (black, green and red) - Navigate volt power supply at 3.6 V (or in accordance with its HP-tolerance 0.5 V). In the mobile phone off, press the keys on. When the ampere when the button is pressed on, it still means that there is a problem on its hardware (HW), the checks need to be components of the on / off until the battery. When the ampere when the button is pressed on, ride around - + 50 mA, then the problem is happening is a problem the software (SW), then the need to do is re-programmed phone (flash) program or upgraded to a higher version.
Power Supply:
Detection 1
Power on failed, while the on / off Power press suppliers in short Amphere & Voltage to the point'0 'analysis: There was a short on the components that are connected directly to V Battery, namely IC PA, Charging IC, and IC Regulator UI Ccont.
Action: Lift the Pin1 from the UI if the IC is still short lift IC PA and beyond. Does not occur until the short. When the normal change of the IC short.
Detection 2
Amphere switch is pressed on DC Power Supply does not have a reaction, when the cable (+) behind the short.
Analysis: There was damage to the on / offTerjadi drop out of the path on / offTerjadi damage to the IC Power Supply (Ccont)
Action: Measure Switch on / offUkur path on the on / off of the correct route on the scheme / offJika all OK then the damage is on the Ccont, if the heat did not want it there until Gani Amphere voltage increases.
Detection 3
Switch pressed Amphere trends indicate increased from 0 to 20-50 mA and stable there.
Analysis: Ccont has given voltage but stop command. HP is usually missing data program. Flash IC is broken, damaged IC Cobba
Action: Use the software to reset the phone memprogram according to the type. Usually the phone will be normal again, if it does not fix Flash IC, Cobba and CPU last.
Detection 4
Switch is pressed, the Amphere DC Power Supply does not have a reaction when the cable (+) does not occur behind the short.
Analysis: There was a drop out of line (+) on the battery so that the flow does not enter the phone
Action: Note the path scheme (+) and use techniques jumpers on the path of dropping out
Detection 5
Swicth pressed, Amphere on the DC Power Supply shows 1 - 2 A stable and there.
Analysis: There was a leakage current due to capacitor or components that capture flow directly to the V Battery.
Action: Isolation components are taken directly to the flow of V Battery.
Detection 6
Switch is pressed, amphere shows 50 mA - 1 A stable and there.
Analysis: There was unsolder the components outside. Components that capture the flow directly to the V Battery.
Action: Heat IC replaced it and try
Detection 7
Switch has been pressed not going short (voltage down to 0)
Analysis: There was a short line on the V Battery
Action: Remove the components that is a path V Battery, one by one.
Detection 8
Switch pressed Amphere increase indicates unstable ago kambali to 0
Analysis: There was not the normal system clock (RTC)
Action: Isolation component series of clock (RTC)
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