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Samsung galaxy S2 GT-I9100 Initial (Lock up) Not Working Solution

Samsung galaxy S2 GT-I9100 Initial (Lock up) Not Working SolutionSchematic,Circuit,Diagram

Samsung galaxy S2 GT-I9100 Initial (Lock up) Not Working Solution Step By Step

Step 1
Initial Failure (Lock up when booting)

Step 2

Re-download SW the phone.
If Phone do not go download mode, boot code area
of Movinand MCP is damaged.
It need to change the UME300(Movinand MCP)

Step 3

Check the AP Reset
AP_N_RST_IN(R513) = 2.8V(High)
Check the U501 and R513 (crack, open, etc.)

Step 4

Check the oscillator clock waveforms.
32.768KHz : OSC500(TP213),
24Mhz : OSC400(C440)
OSC400 is operating when
phone is not in sleep mode
Check the OSC500, OSC400 and R418.
(Crack, open etc.)
Check the output clock waveforms and frequency.
※ Test condition (Oscilloscope setting)
: 20.0us.div (time division) @ 32.768Khz
: 100ns.div (time divisioin) @ 24Mhz
mal

Step 5

Change UCP400,U501

Step 6

Change PBA

Step 7

END
Unofficial Support Site For This Phone By welcome Zone Haldwani 

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