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Posts Made By:
mon2
Forum:
Troubleshooting Laptops, Tablets, and Mobile Devices
02-07-2023, 09:51 AM
Replies:
16
Macbook Air A1466 Fluctuating 3v supply
Views:
389
Posted By
mon2
Re: Macbook Air A1466 Fluctuating 3v supply
Tomorrow, also check the resistance to ground of vreg5 (pin 29) which you have reported is also fluctuating ?
Forum:
Troubleshooting Laptops, Tablets, and Mobile Devices
02-07-2023, 09:30 AM
Replies:
16
Macbook Air A1466 Fluctuating 3v supply
Views:
389
Posted By
mon2
Re: Macbook Air A1466 Fluctuating 3v supply
Do wait for other comments but there is someone who is partially shorted on this consumer side of the rail.
Suggestion is to inject 1 volt (not higher) but ok to use higher current. The idea is to...
Forum:
Troubleshooting Laptops, Tablets, and Mobile Devices
02-07-2023, 09:02 AM
Replies:
16
Macbook Air A1466 Fluctuating 3v supply
Views:
389
Posted By
mon2
Re: Macbook Air A1466 Fluctuating 3v supply
That is too low of a resistance for this rail. This is likely causing the fault with the current sense loop observing a heavy load and power pulsing this rail.
With flux and patience, lift up one...
Forum:
Troubleshooting Laptops, Tablets, and Mobile Devices
02-07-2023, 08:42 AM
Replies:
16
Macbook Air A1466 Fluctuating 3v supply
Views:
389
Posted By
mon2
Re: Macbook Air A1466 Fluctuating 3v supply
Remove all power. Meter in resistance mode.
What is the resistance to ground of PP3V3_S5_REG_R ? (L7560)
Forum:
Troubleshooting Laptops, Tablets, and Mobile Devices
02-07-2023, 08:40 AM
Replies:
16
Macbook Air A1466 Fluctuating 3v supply
Views:
389
Posted By
mon2
Re: Macbook Air A1466 Fluctuating 3v supply
What is the 820-**** board number for your unit ?
Forum:
Troubleshooting Laptops, Tablets, and Mobile Devices
02-07-2023, 05:24 AM
Replies:
16
Macbook Air A1466 Fluctuating 3v supply
Views:
389
Posted By
mon2
Re: Macbook Air A1466 Fluctuating 3v supply
What is the ppbus_g3h voltage to ground? (Check at the fuse)
Is the 3v42 rail stable?
Showing results 1 to 6 of 6
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