Hello there guys, i'm searching informations about this unit.
A friend of mine made some weird trouble with power cables, resulting in a not powering on unit. (Blowin' up fuse when powered)
I'm searching for schematics about this motherboard.
This unit il labeled as "AR6002B".
Here's the story:
(I'm quite confident in repairing notebook motherboards, so let's give it a try! )
No bad components after visual inspection, so let's go in deeper.
B+ (yellow) cable is shorted (making tests with protected PSU)
ANT, ILL and ACC are free and with no shorts.
The section i'm going to inspect is the primary filter and the 78D09, the ic near the smaller alu cap.
Do someone have informations about repairing this motherboard?
Thank you in advance
P.s. i cannot upload photos of the board due to minimum post count
Related
This was the state of my Universal's USB socket. Note the four holding shoulders have come away from the board.
The middle three tracks off the board have come away from the board with the socket too - worse case scenario I'd have guessed.
Here you can see the repaired unit with the four shoulders relocated and all 5 pins reconnected.
As you can see, the 'tiniest' of wires have been placed there to make the contacts as I'd ripped the tracks off as mentioned.
I'd have put this down as a non-repairable. To be fair, I couldn't even see the connections without taking a photo and zooming in on the PC.
My friend did this for me today - he's a PCB specialist by trade.
Anyone needing a repair in the UK, feel free to drop me a PM and I'll see if he can do the same for you.
Cost would be around £20-£25 returned.
I thought mine was a goner - so relieved to get the unit back working!
Very good work.
I had the same problem with my universal after an accident with my car loarder cable.
But I had luck and got a replacement universal from t-mobile.
I have the same problem with my Polaris and I thought about repairing it and refurbish it to give it to someone to use it. The battery still holds. What I want to ask... where did you get the socket from? How much did it cost? You got only the socket... right?
Hi,
I dropped my Hermes (belt clip broke) and now I have two problems with it:
1) the keys around the joypad don't work.
2) most of the time the display is just white but sometimes it still work, but the pixels are shifted down about 5 (the bottom 5 lines are at the top.
I checked the Wiki but the service manual has no diagrams in it so I can't troubleshoot to find which PCB is broken. Summed up it just says replace to boards one by one until the problem is solved. I've diassembled it and looked with a magnifiying glass but I can't find a crack. After reassembly everythings the same (yes, I double checked the connections to make sure none were loose). I'm guessing that the break is somewhere in the middle of a multi-layer PCB where it is not visible.
So what I'm looking for is any type of schematic diagrams that will allow me to trace connections. Then I'll know what part to order.
Any ideas?
Cheers
DB
still broke
Hi Mike,
Thanks for the info. I was afraid it would be difficult to get a copy of the drawings. I'm a master electronic technician and have the equipment to to do some testing but it doesn't help to just randomely measure PCB traces without knowing where they go or what signals should be there. The PCB I was referring to is the D-Pad board. It appears to be a 4 layer board, which makes it imposssible to trace manually.
I read the complete 13 page ( http://forum.xda-developers.com/showthread.php?t=349476 ) post about the WSOD but none it doesn't seem to be touch sensitive. It doesn't matter where I put preasure, there is no change.
I don't want to start buying replacement parts on a trial and error basis because that would get expensive if I don't find the problem on the first go. Maybe I'll buy a defective unit on Ebay (or if anyone has one to sell I'm in Germany. PM me) and try from there.
Cheers
DB
Don't know if this will help, but someone submitted some service manuals to my site ages ago.
I can't charge my beloved hd2 anymore. Apparently the USB connector broke off Opened it up and as soon as I unscrewed the main board the USB connector just fell out. Is it even possible to fix this??
Yes should be repairable, either exiting USB socket can be resoldered or a new one can be obtained & soldered to board.
If you can't do the soldering a local repair shop can do it & cost should be low as you doing time consuming work of strip & assembly.
Not a big fan of the micro USB, the mini was far better in terms of reliability & connection capability (extra pins could feed audio & video)
Epoxy resin or PU40 could be applied around USB socket after successful repair to help support it during use (not too much or may hinder future repair) ... factory implementation of this sockets attachment is cheap to be polite.
Thanks for the prompt reply mister b I was just concerned coz I thought it was just one pin that came loose that would be quick to resolder, with maybe a little residual left over on the board for me to work with, but when I saw there was nothing left on the board at some pin connection points I got really worried. Thought I'd have to replace the whole board to get it fixed lol. Don't know much about these things so I'll probably be getting it to a repair shop. Thanks again
Yeh give it to a trusted shop as board is a bit chewed up & if they are successful try & support usb socket via adhesive as the board fixing repair may not be as strong as original & original was not that good
Hello , Unfortunately a component seems to have burned out. It is located on the motherboard under the core board. See photo. Pumpkin won't or can't tell me about it. Since the component is probably a transistor, it has unfortunately burned out and the designation is illegible. Can anyone tell me about it or have a wiring diagram. The model is Pumpkin AA0505B-b01 Made 2020 06.15 Version 06.
Can someone tell me what this element is and I can try to replace it. It is apparently burnt and the circuit board gives a short. As a last resort I will order a whole new board from here
https://vi.aliexpress.com/item/1005003761661111.html?spm=a2g0o.cart.0.0.7ae938daumFKWu&mp=1&gatewayAdapt=glo2vnm
You have the link to the unit and the seller...
Well... why not asking him?