Author Topic: Powercube Usb Original Usb Supply Repair  (Read 2783 times)

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Offline ChrisGreece52

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Powercube Usb Original Usb Supply Repair
« on: April 21, 2015, 05:57:14 pm »
Hello a friend got me a Powercube as a Christmas gift and suddenly the USB supply did not work anymore...
At first i tried disassembling it and i found a cold solder joint in one of the diodes. Then i got it working till today when it fell from the table... i cranked it open once again and i can not find any problem.
I measured all the diodes with my multimeter but i could not find a damaged one....
The IC is a OB2536AP (datasheet attached)
Please help to track the cause of the problem.
When i connect  a device to the usb port i usually heard a noise coming from the transformer i suppose.Now the sound is gone.
The thing written on the transformer is RM6H-112-4 or its a "B"like  BM6H-112-4
anyway i could not find a datasheet of anything....
Photos http://postimg.org/gallery/3ivyiw4b6/
Schematic : I could not find one if you want to reverse engineer it and post the schematic tell me.

Thank you in advance
« Last Edit: April 21, 2015, 07:55:28 pm by ChrisGreece52 »
 

Offline ChrisGreece52

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  • Posts: 803
  • Country: gr
  • Electronics Engineering Undergrad
Re: Powercube Usb Original Usb Supply Repair
« Reply #1 on: April 22, 2015, 12:26:10 pm »
Any ideas ? What should i measure now ?
 


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