Repara tus cosas Comunidad Tienda

iPad Air Wi-Fi + Cellular, modelo Nº. A1475. Disponible en gris espacial o plateado, con configuraciones de 16/32/64/128 GB.

Preguntas 125 Ver todo

Opciones

PMIC Replaced - Missing voltages

I have an iPad Air (1st gen) which I have replaced the PMIC. The reason for that is because the iPad charges only when it was switched off.

I have lifted the following pads during removal of the PMIC:

  • B17
  • B16
  • B15
  • C16

Dont know If this is the cause of the problems below:

  • No backlight (filters are good)
  • Missing voltage on PP3V0_SPARE1
  • Missing voltage on PP3V0_S2R_SENSOR
  • Missing voltage on PP3V3_ACC
  • No Heat on the board, and I can see apple logo on screen without backlight looping.

Anyone can point me in the right direction or explaining those missing voltage lines could be a BIG help understanding the situation.

Thanks :)

Block Image

Contesta esta pregunta Yo también tengo este problema

Es esta una buena pregunta?

Sí No
Puntuación 0
Agregar un comentario

1 Respuesta

Filtrar por:
Mas Útiles Más Reciente Más antiguo

Opciones

hello Peter,

too high temp and flow you use for taking off a glue and a ic. It seems like cpu overheated. Have you stencil for reballing?

Fue útil esta respuesta?

Sí No
Puntuación 0

6 comentarios:

Yes! I have used a brand new PMIC already reballed.

Also I have measured around all Caps with Multimeter Diod mode wich resulted NO short on the board.

- de

Or you suggest I should reball the CPU???

- de

this is dependent to board measurement. But it looks like. I would measure RAM and NAND beforehand but it looks like yes, I would do a CPU reballing.

- de

sometimes, problem is in technical's hand work. Are you sure IC is sitting down correctly?

- de

A smudged the corners and it seems ok....

- de

Mostrar 1 comentario más

Agregar un comentario

Añadir tu respuesta

Peter Hupuczi estará eternamente agradecido.
Ver Estadísticas:

Ultimas 24 horas: 2

Ultimos 7 días: 4

Ultimos 30 días: 22

Todo El Tiempo: 395