Need schematic - failed L300 board

[spleenharvester]

Managed to snag one of the super rare GM45-based L300 boards. Assumed it would be the NEC Tokin problem so just replaced it without even testing as per usual.

Turns out it's completely dead. No signs of life on either AC or battery. Nothing looks physically damaged. Nothing heats up or clicks.

Problem is, being a very rare board, I can find no schematic for it. Its code is 6050A2170401-MB-A03, V000138390. Both of these codes point to an Inventec PS10S - this one is just a PS10 so the schematic doesn't match.

Anyone got it?

Cheers

[spleenharvester]

Re: Need schematic - failed L300 board

Okay so:

With battery + CPU plugged in: powers up (Tokin cap currently removed so unsure if POSTs)
With battery + AC + CPU plugged in: Same as above but no AC/Charge light (i.e still powers but it's as if AC is unplugged)

But:

With battery + no CPU plugged in: completely dead with no signs of life
With AC only: same as above

So pretty conclusively an open circuit MOSFET or similar in the charge circuit then? But why would it not power without a CPU if this were the case?

[bluestone]

Re: Need schematic - failed L300 board

try this one

[spleenharvester]

Re: Need schematic - failed L300 board

Hahaha oh dear, found the cause of the problem. Half way through testing the clover leaf plug had come ever so slightly unplugged.

Added 3x330uF caps in place of the 900uF Tokin and all is working brilliantly now. And cpu-z confirms it is indeed the GM45 version.

Only problem now - one of the USB ports is mangled. Pins are all still intact but the black part has snapped. Is there any way of replacing the black part or do I have to replace the entire port? (It's one of those which has two on one block - I have identical spares around but I can see it being horrible to solder)

[bluestone]

Re: Need schematic - failed L300 board

Good for you, That's the good thing to hear in repairs