Model : I Phone 7 Plus
Issue/Problem: No power
Action Taken:
1st Step - Check sa Charger Schematic no reaction/Reading
2nd Step - Open Unit the Test Sa DC bench/ Power Supply Still No reaction/reading
3rd Step- Replace New Tristar/U2
4rth Step - Check Sa Dc Bench Normal na reading nag Boot narin ang phone
Upon check Ayaw naman mag charge ang phone
1st Step - Check VBatt Voltage output No voltage.
2nd Step - Tigris IC Remove and Replace After remove at replace still not charging 3-time ako nag palit
3nd step - Diode Reading sa Pads Upon Checking A5 to E5 Pads Reading is 2.124 abnormal dapat OL Sya Check ulit mga connected sa line Nakita ko Q4001 putok na .
4rth Step - Replace Q4001 and all Done charging na
Lesson ?
Always Measure pads bago mag palit ng ic para sure na wala ng ibang problem
Done
Problem Solve
Issue/Problem: No power
Action Taken:
1st Step - Check sa Charger Schematic no reaction/Reading
2nd Step - Open Unit the Test Sa DC bench/ Power Supply Still No reaction/reading
3rd Step- Replace New Tristar/U2
4rth Step - Check Sa Dc Bench Normal na reading nag Boot narin ang phone
Upon check Ayaw naman mag charge ang phone
1st Step - Check VBatt Voltage output No voltage.
2nd Step - Tigris IC Remove and Replace After remove at replace still not charging 3-time ako nag palit
3nd step - Diode Reading sa Pads Upon Checking A5 to E5 Pads Reading is 2.124 abnormal dapat OL Sya Check ulit mga connected sa line Nakita ko Q4001 putok na .
4rth Step - Replace Q4001 and all Done charging na
Lesson ?
Always Measure pads bago mag palit ng ic para sure na wala ng ibang problem
Done
Problem Solve