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Wednesday, August 16, 2023

Samsung skela 315 petronus- bA41-01763a no display

Samsung skela 315 petronus- PA4101763a
      Prblm- no display

   ( this modal no schamatic)
Action-
            Put DC supply amp- .260
And  🔙  .009 - .010
    Some time amp -.350

      Stand multimeter and check
  Vin section also✅
3v 5v also ✅
    Ram voltage 👍
Core voltage not generate

Back trace ,
            board is 3rd genration
   Follow 3rd genration sequence
   Ram voltage 👌
    1.8v ✅
      1.05 VTT voltage 👍
  But not generate core voltage

1.5 VDDQ voltage (S3 state) convert one mosfet  s0 voltage
      
Mosfet input drain 1.5 voltage 👍
Mosfet output source .65 voltage (✖️)
               
  After check gate supply is missing
   Then,
             Remove this mosfet gate is ok
Change this mosfet
Board ON
Core voltage come & give display
   ( this board no schamatic and no board parts no. )
✅👍