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Old 03-25-2020, 07:08 AM   #1
sautzer
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Default PS4 Wi-Fi chip bad joint

First off, English isn't my primary language so I don't know all the technical terminology. So I ended up owning this PS4 slim that had a problem pairing controller. Once opened, I removed the WiFi chip and some joint ended up like in photo (I don't know the technical terms, if you could tell me how it's called I'll appreciate). How can I fix this?
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Old 03-25-2020, 01:21 PM   #2
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Default Re: PS4 Wi-Fi chip bad joint

oh shit!

you need to rebuild the pads - watch some luis rossmann video's on utube.
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Old 03-25-2020, 05:39 PM   #3
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Default Re: PS4 Wi-Fi chip bad joint

"Cratered BGA Pad" is something you can look up on Google for some info. I second looking at Luis Rossmann on YouTube on repairs.
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Old 03-26-2020, 12:14 AM   #4
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Default Re: PS4 Wi-Fi chip bad joint

Thanks you guys! Really appreciate your support, hopefully the next reply will be for telling you I succeed
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Old 03-27-2020, 12:58 AM   #5
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Default Re: PS4 Wi-Fi chip bad joint

Sorry guys, I've seen many videos from Louis but didn't found one with a similar problem to mine, could you link one please?
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Old 03-27-2020, 09:52 AM   #6
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Default Re: PS4 Wi-Fi chip bad joint

The general idea would be to:

1) Identify where the electrical net would go to.
2) Identify where you can jumper something to that BGA ball.


In your case: The red box looks like it's a signal pad that is connected to the via immediately to the left. You can scrape off the green solder mask from the via and add a 'jumper' wire (really thin wire -- 32 AWG (8 mil) or smaller wire for the red box.

The purple boxes appear to be connected to GND. You may be able to scrape off the green solder mask around it and get a copper foil sheet and tack it down "outside" of the BGA region.
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Old 03-31-2020, 05:13 AM   #7
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Default Re: PS4 Wi-Fi chip bad joint

So I kind of resolved, now the PS4 turn on and update (with the non working module it just couldn't giving me an error) but I haven't an official controller, just a nacon, and can't get past the screen where it says to press the PS button
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Old 03-31-2020, 08:21 AM   #8
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Default Re: PS4 Wi-Fi chip bad joint

make sure the usb cable is connected to the first port
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Old 04-05-2020, 03:49 PM   #9
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Default Re: PS4 Wi-Fi chip bad joint

So guys I think I messed up badly. I had the occasion to try an original DS4 but nothing, the PS4 was stucked. After some soldering and desolring the WiFi module the PS4 doesn't turn on. I've tested the PSU and it's fine, how could I try to locate the error? I've checked for missing component next to the area where I applied the hot gun but nothing is missing
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Old 04-06-2020, 03:49 AM   #10
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Default Re: PS4 Wi-Fi chip bad joint

So found the problem, I dissoldered a little resistor, could someone tell me what resistor is it?
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File Type: jpg SAD-001-1-981-279-21-bottom1.jpg (384.1 KB, 24 views)
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Old 04-07-2020, 07:26 PM   #11
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Default Re: PS4 Wi-Fi chip bad joint

Quote:
Originally Posted by sautzer View Post
So found the problem, I dissoldered a little resistor, could someone tell me what resistor is it?
It's likely just a pull up or pull down resistor. Can you identify if one of the pads is connected to a power rail or ground? If so, a pull up, or a pull down resistor is likely - in which case, start with a 10kOhm resistor.

Other questions:
- What's the board model number? (alternatively, what's the PS4 model number?)
- What's on the primary side in that general area?
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Old 04-08-2020, 02:22 AM   #12
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Default Re: PS4 Wi-Fi chip bad joint

Quote:
Originally Posted by ngth82 View Post
It's likely just a pull up or pull down resistor. Can you identify if one of the pads is connected to a power rail or ground? If so, a pull up, or a pull down resistor is likely - in which case, start with a 10kOhm resistor.

Other questions:
- What's the board model number? (alternatively, what's the PS4 model number?)
- What's on the primary side in that general area?
So none of the pad is connected to ground (I tried to see if there's continuity with the brown pad on the board, I'm a noob sorry). Also the PS4 is a SLIM CUH-2016A B01Y, motherboad SAD-001 1-981-279-21. On the primary side there's the NOR chip and the southbridge



On another forum they says that is a 22 Ohms.
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Old 04-08-2020, 05:33 AM   #13
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Default Re: PS4 Wi-Fi chip bad joint

Here's a closer look at my motherboard
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Old 04-08-2020, 03:51 PM   #14
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Default Re: PS4 Wi-Fi chip bad joint

If it's not connected to GND or VCC, then it's probably a series resistor - 10 to 33 Ohm seems reasonable.

I compared your top and bottom pictures and traced where it goes. Looks like a 5-6 mil wide microstrip trace from the IC (top side), to a through hole via to the bottom side, the (missing) resistor, then a via to an internal layer (no microstrip trace on the top side).

There's no datasheet for that IC either... but with the pics you provided, its a series resistor for the signal to snub out any over/undershoot caused by the driver on that IC. If you don't have a small value resistor, you can bridge it to begin with. Power it on and see if it works for testing.
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Last edited by ngth82; 04-08-2020 at 03:53 PM..
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Old 04-09-2020, 03:42 AM   #15
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Default Re: PS4 Wi-Fi chip bad joint

So I did like that but putting a disc won't power it up (I'm a noob and in the process I broke the power button and it's flex cable, tried to repair it but didn't worked but if I move it, the PS4 turn on led on the power button randomly)
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Old 04-09-2020, 05:23 AM   #16
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Default Re: PS4 Wi-Fi chip bad joint

If I put to ground the lef, they power on, so I think that the powerboard is still functional
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Old 04-10-2020, 08:57 AM   #17
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Default Re: PS4 Wi-Fi chip bad joint

Quote:
Originally Posted by sautzer View Post
If I put to ground the lef, they power on, so I think that the powerboard is still functional
Well I dissoldered the bridge I made where it was the resistor and this trick still works
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