Rep: 11
1
My power supply component went bad and I replaced it, but I lifted up both the pads off the board. I thought I repaired it. I can't get a good pic of what I done, but I tested the connection's ohms with a multi-meter and it is coming up to 4.635.
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Rep: 496,5k
11
384
1,5k
Try connecting the zener diode directly across either PC230 or PC231 and not to the pads for PD203.
If the motherboard model is an NM-C221, the schematic shows that the diode is in parallel connection with both of these capacitors. If they both still connect to PR229 resistor and pin 3 of the charge port jack it should be OK.
Here's an image from the schematic that shows the PD203 connections
(click on image)
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I mean if the pin is for the adapter ID (which in theory means there is little current), his current job will do more than fine for the purposes of establishing a communication with the main board.
The circuit shows where PD203 connects to.
It's a zener so it provides protection against transient voltages on the adapter ID lead.
If the Adapter ID lead still connects to PR229 (and the capacitors) then if PD203 is missing all that means is that the voltage protection circuit is not there.
Whether this may cause problems in the adapter or for the +3VALW voltage supply, you may not know until it happens.
My view is that the circuit designers placed it there for a reason otherwise it wouldn't be there.
correct. and given the component is dead perhaps is just a symptom and not a cause (of laptop dying). But I imagine in his case he just want the thing to turn back on again, so such .. protection feature can be put aside.
Very good job hunting down the schematics.
Do I need a certain diode?
The model or type number of the diode is shown in the schematic next to the diode i.e.A25123-01F etc.
Search online for the number
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4 commentaires
positioning your phone slightly away from the object you are taking picture of can be useful. The phone cannot focus on something that's too close to it, so you get a blurry picture.
The minimum distance (for my phone at least) is around 8cm, or 3 inches.
Yeah even a picture search (https://i.ebayimg.com/images/g/eVEAAOSwZ...) is a bit too blurry (low-res, mostly) to tell anything.
It's the front side, below the power connector.
par Xavier Jiang
@repairpers23434 besides a better picture we will also need to know what motherboard this is. It looks like it could be a NM-C371 or a NM-C372. Applying jumpers etc. will not be an issue for as long as we can see what damage you have and what this all looks like. Remember, since you will have to do some soldering, you might as well remove the board. That way you can actually find out what we still need to know.
par oldturkey03
@oldturkey03
Just checked the circuit for PD203 and it is the same for the NM-371 and NM-372 motherboards as it is for an NM-C221 as shown below
Cheers
par jayeff
@cdr_xavier I will take another screenshot. My phone is not the best, so the picture quality will be still bad.
par RepairPerson