G90C bricked by 12vdc

tomeks

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By mistake I've connected my camera to 12vdc :confused:. Now it desn't start up. When I connect supply the blue led only lights and nothing more. Do You think that it is chance to repair it? Can be damaged transistor, chipset?
 

parklawn

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The odds on repairing it are not good, however, you should open it up and have a look at what's burned. If you have the skills required, you may be one of the lucky ones and replace what's necessary. I read about a guy who fried his GoPro and made a valiant attempt at repair, you can follow his saga here http://diydrones.com/forum/topics/managed-to-burn-out-my-gopro
 

Mandami

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Do You think that it is chance to repair it? Can be damaged transistor, chipset?
... the best is to check the board. I don't think the power from the charger feeds directly the dashcam, so there should be another DC-DC converter somewhere on the board. If you're lucky you fried only this part.
 
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tomeks

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Thanks fellows. I'll inform You how the case ended.
 

Hajo

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Definitely not a DC/DC - if then a linear regulator. But there's USB in the cam that needs 5V. The supply is most likely directly connected to the A7. Applying 12V to that will fry it. I have very little hope unless you're willing to replace the A7. It's made in a 32nm CMOS process, which is known not to be happy at all about unintentional 12V ;)
 

Mandami

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Definitely not a DC/DC - if then a linear regulator.
No one said it's a switched mode converter.
The supply is most likely directly connected to the A7. Applying 12V to that will fry it. I have very little hope unless you're willing to replace the A7. It's made in a 32nm CMOS process, which is known not to be happy at all about unintentional 12V
Do you have any datasheet information (e.g., input voltage ranges) ?
 

Mandami

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1.8v or 3v
Some data:
The A7L / A7L(M) chip includes several fail-safe pins that can have active signals at or below 3.6-V level when the A7L / A7L(M) is powered down.
and then
Fail-Safe Pins which can have active signals at or below 3.3 V when the A7L / A7L(M) is powered down.
and
Power for power management module (3.6-V maximum). Connected to external battery/adaptor clamping circuit.

So a 3.6 V input voltage.
 
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jokiin

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Too many ¯\_(ツ)_/¯
Whatever the voltages are they are stepped down from the 5v input, the regulator IC won't handle 12v though
 
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