can it be fixed?

[salty21]

A friend of mine recently bought a Logitech G27 racing wheel to replace his broken G25. He's had The G25 apart and says there's a burnt out chip, and with logitech not selling spares for these wheels he never bothered to attempt to fix it, but I was hoping to buy the G25 from him and take it to a local electronics shop i know to get it fixed, but im unsure if it's even possible to fix it as i know nothing of curcuit boards and wotnot.

In the top of this pic it's the top right large chip with an identical one next to it thats burnt out (the one that looks like a mechanical ant).

Can it be fixed?

https://www.bikechatforums.com/files/g25_curcuit_board.jpg
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[CaNsA]

Probably,

Get me a higher quality, close up of the offending item dude.

[ncrn]

In theory you could replace it and it could start working again. It is possible the chip has just failed, but it is also possible that another component has failed, causing the initial damage.

Its worth a shot but it won't necessarily fix it.
____________________
Past: 55 Sym Jet, 91 ZZR250, 03 NSR125R. Present: 97 ER-5.
https://www.nsr125.co.uk - NSR Owners forum.

[lihp]

Can you post the details from the top of the chip>?

[salty21]

very hi res image https://www.flickr.com/photos/anachrocomputer/5120265086/sizes/o/in/photostream/

or a screen shot, it's the lower chip if it makes a difference

https://www.bikechatforums.com/files/hi_res_g25.jpg
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[salty21]

[CaNsA]

Yeppers you can replace the item, how ever, it could end up being a
https://www.gomonews.com/wp-content/uploads/2009/08/can-of-worms.jpg

[Frost]

A chip like that would cost about 40p to replace. You'd have to unsolder that one and solder the new one in obviously, and there is no way of knowing for certain it won't blow again, but i'd give it a shot.

Out of interest how do you or your mate know it's that chip?

[Scotsman37]

Here's note by a person with the exact same problem that you've got and it even mentions exactly the name of the chip(s) that had to be replaced

https://macnetwork.files.wordpress.com/2010/10/p1050979.jpg

https://macnetwork.wordpress.com/2010/10/30/129/

[salty21]

[ncrn]

[salty21]

it's not as melted as the pic above, it's just a bit brown
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[salty21]

think i will just do as the guy did in that link (cheers scotsman!)

Any recommendations on what solvent cleaner to use, is brake cleaner ok?
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[Scotsman37]

Take a trip to your nearby Maplins electronics store, if you have one and they will set you up or if someone on here is electronic Tech or greater maybe they will know? Pity my brother fixes the electronics on fighter jets, etc, except he is not in the country at the moment to ask, sorry!

[Frost]

I get all my bits and bob's from here:
https://uk.farnell.com/

[ThoughtContro...]

[Codemonkey]

[mistergixer]

[salty21]

picked up the wheel today and took it apart to have a look and do some testing as per the guide which scotsman kindly found.

https://www.bikechatforums.com/files/dsc00209.jpg

https://www.bikechatforums.com/files/dsc00213_561.jpg

In the guide it says he tested the resistance between the coil's in the motor, this is where im stuck, i measured the resistance between the red and black wires leading to the motor, is this the same thing? all i am getting is 001 ohms with the multimeter set to 20k ohms so virtually nop resistance. This is the same for both motors.

I measured the voltage coming in with the power supply connected and this is 23.8v so thats ok and the wires leading from the input to the circuit board show the same 23.8v.

So im kind of stuck at the moment on what i should be testing. I'm going to get some wire tomorrow and feed the 23.8v from the input directly to the motors to see if they spin up but apart from that i could do with pointing in the right direction.

The replacement chip is on order and should be here thursday so i just want to check what i can before i take it down to be replaced.

He mentions something called an encoder in the guide, is this the black plastic thing on the back of the right side motor?
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[ThoughtContro...]

[salty21]

right i have tested again on 200 ohms and the motor with the blown chip is 14 ohms and the other is 28.3 ohms so this would suggest a dirty motor that need a clean, so i went ahead and ordered 2 replacement chips as they were only 80p each andd i have a spare incase it goes again later on.

So next question is, how do i clean the motor?. As far as i can see you cant remove the outer casing without butchering it and risking it spinning inside itself when it's put back together. Can i just spray inside the holes at all angles with brake cleaner? is brake cleaner ok lol?

https://www.bikechatforums.com/files/side_201.jpg

https://www.bikechatforums.com/files/top.jpg

https://www.bikechatforums.com/files/bottom_174.jpg
____________________
04 NSR 125(sold) ---- 03 CBR 600rr(sold) ----90 pan euro ST1100 '' ----02 CG 125
94 CB400 Super Four ---- 2000 VTR SP1 (sold) ---- 08 ninja p8f(sold, meh) ----05 CBR600rr

[finpos]

In the first instance, try blasting it out with something (electrical contact cleaner would be ideal...). The commutator is the brassy bit you can see through the hole in the side. My guess would be that brake cleaner will be fine.

If that fails, you'll have to unbend the little crimps at the back of the metal shell, where the wires go in - the whole back end should then fall off. Avoid if possible due to fiddly re-assembly.

f.