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jolinpc

 em análise Teclast Tbook 11 Load LED always on

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Hello!
This tablet has fallen into my hands, which, apparently, charges, turns on and works well, but with the peculiarity that, although it is not plugged into the current, the load LED remains on as if it were charging, and in the windows when charging, the battery appears as if it is charging.

After disassembling the tablet, on one of the stickers and even on the housing itself, there is a mark of overheating of a component, which specifically corresponds to a coil. I attached photos of the tablet, marking on one of them the coil that overheated, and set to 100ºC after a while of operation.

Have you had a similar case? The coil is wrong?

The Tablet is a Teclast Tbook 11 with double S.O. and with plate CT106-MAIN

 

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Hola!
Ha caído en mis manos esta tablet, la cual, aparentemente, carga, enciende y trabaja bien, pero con la particularidad de que, aunque no esté enchufado a la corriente, el led de carga permanece encendido como si estuviera cargando, y en el windows cuando carga, aparece la batería como si estuviera cargando.

Tras desmontar la tablet, en una de las pegatinas e incluso en la propia carcasa, hay una marca de sobrecalentamiento de un componente, que concretamente corresponde a una bobina. Os adjunto fotos de la tablet, marcando en una ellas la bobina que se sobrecalienta, y se pone a 100ºC tras un rato de funcionamiento.

Habéis tenido algún caso similar? La bobina está mal?

La Tablet es una Teclast Tbook 11 con doble S.O. y con placa CT106-MAIN

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IMG_20190514_184840 marcado.jpg

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 @jolinpc Bom dia

Se a bobina esta aquecendo é porque tem um consumo elevado de corrente, acredito que nao é a bobina o defeito mas sim quem manda tensao para ela, talvez até um mosfet em curto nessa linha.. 

Qual componente está causando aquecimento embaixo dessa carcaça?

 

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Hi. Thank you for responding first.
That label was on top of the coil that I have marked on my photo. At first I thought it could be the small capacitor that was next to the coil, but I raised it and the result is the same.
I'm going to make some measurements on the AXP288C, because I think it may be the culprit, since the coil goes straight to the chip.
The coil gets very hot, just when you turn on the screen that coincides with the ignition of the load LED at the same time.

 

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Hola. Gracias por responder ante todo.
Esa etiqueta estaba encima de la bobina que yo he marcado en mi foto. En un principio pensé que podía ser el pequeño condensador que había junto a la bobina, pero lo he levantado y el resultado es el mismo.
Voy a hacer unas mediciones en el AXP288C, porque creo puede ser el culpable, ya que la bobina va directo al chip.
La bobina se caliente mucho, justo cuando enciende la pantalla que al mismo tiempo coincide con el encendido del led de carga.

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