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Step 1 — Remove U3101
Remove the chip cleanly, with warm air. On my Quick 861DE station, I use as settings 400 °: C and 100L / min. For you to decide which settings you prefer, you can find the Quick 861DW on the shop.
Step 2 — Verification with the schema
If we compare to the diagram on the PhoneBoard software;
Step 3 — Put a jumper
Take copper wire diameter 0.02mm
Step 4 — Ask all jumpers
The procedure is the same for F12, H12, J12. A12 and B12 are grounded and are not used for U3101 operation, no need to jump.
Step 5 — Rebillage de U3101
Ask the flow.
Step 6 — Check the balls
Extract the chip by pushing with a thin tweezers.
Step 7 — Replace the chip
And we end up putting the chip back. Flow, position and solder with hot air.
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