iPad air lỗi nút volume lên xuống
step 1: ’cause we had cross resistance 1K, so you have to correct range 1K, measure at 2 socket bases, if lost any bases -> tracking to line and lifting.
step 2: which buttons weren’t worked or shorting sometime ->isolate capacitors (purple frame).
step 3: measure at foot of the wire (yellow frame), if doesn’t have resistance -> lost base to cpu.
step 4: short shorting resistance (green frame) is ok, but replace same value still the best.
Note: watch carefully socket and test volume line, rarely error at main.
step 2: which buttons weren’t worked or shorting sometime ->isolate capacitors (purple frame).
step 3: measure at foot of the wire (yellow frame), if doesn’t have resistance -> lost base to cpu.
step 4: short shorting resistance (green frame) is ok, but replace same value still the best.
Note: watch carefully socket and test volume line, rarely error at main.