Question My Trimmed PS2 Won't Boot

[Bill_The_Fish]

This is probably something really simple (or at least that's what I hope). I have just finished my first ever trimmed console of any kind, but unfortunately it wont boot. The board itself doesn't seem to have any damage on it at all, so hopefully my wiring is at to blame here.

semi important information:
- the ps2 seems to be a 79003 model (it didn't have the sticker on the case when I got it)
- I am powering this ps2 with a " CUSTOMLEDMODS Power PS2"
- I am trying to get display out of the original display connector, which I am temporarily leaving on the bard.

Here is what I think it might be:

I can't tell If I am supposed to connect a 5 volt line to this chip here, I think I was supposed to, but I just want to ask before I break something. the only thing that is making me uncertain here is that the picture showing the 5 volts is in the "Standard Voltage Relocation" section, and I'm not sure If I'm supposed to ignore it or not.

If that's not the problem, I have taken some pictures of my wires and where they connect to the board:

 

[Customledmods]

You need to connect the 5v to the av chip ?

https://bitbuilt.net/forums/index.php?threads/benge-bs2-portable-ps2.3993/post-45498

 

[Bill_The_Fish]

You need to connect the 5v to the av chip ?

https://bitbuilt.net/forums/index.php?threads/benge-bs2-portable-ps2.3993/post-45498

ok that is good to know, and I will try that as soon as I can. I see that on the page you linked, then you removed the chip completely. is that necessary and why?

 

[Customledmods]

What chip ?btw that’s @Benge post I just wanted to show you a reference.

 

[Bill_The_Fish]

sorry, I guess its not much of a chip, But I mean the linear regulator shown here: (link) with the 5v and 8.5v marked. I seen that you had that regulator removed in (this image here), and I'm wondering if it needs to be removed to work properly.

 

[Customledmods]

You can remove it just make sure your still getting 5v there

 

[Bill_The_Fish]

well... I guess I must have just broke the board when I was trimming it, because it doesn't work anymore. I did some more testing and I can't find what is causing it to not work, but there are a few more things I might try.

when I power it on this is all it displays:

 

[cfc_12]

post the pic of your trimmed motherboard here, both front and back

 

[Bill_The_Fish]

wire colors and voltages:
(1.25v) yellow
(1.75v) blue
(2.5v) white
(3.5v)green
(5v) Red
here are some pictures of the front and back of the trimmed board:

 

[cfc_12]

did you sand the edges?

 

[Bill_The_Fish]

did you sand the edges?

I sanded all the edges with 600 grit, than again with 1000 grit sandpaper

 

[Customledmods]

Check if anything changes when connecting av out here.

 

[Bill_The_Fish]

Check if anything changes when connecting av out here.
View attachment 36204

I connected the av there, and it unfortunately made no difference.

after this failed I noticed that when measuring the voltages from the voltage regulator, most of the voltages are almost half of what they are supposed to be (ie. 5v line read as 3.4). Is that normal? when I disconnect the wires from the voltage regulator, all the voltages are normal.

 

[Customledmods]

that’s not normal, Also what are you powering the reg board with?

you have 1 more 3.5v line you didn’t solder on your board.

 

[Bill_The_Fish]

that’s not normal, Also what are you powering the reg board with?

you have 1 more 3.5v line you didn’t solder on your board.
View attachment 36207

I'm just powering the board with a 3A usb charger.

what do you think it causing the voltages to be so wrong? I do have pretty long wires, but I was measuring the voltage directly on the voltage regulator, so I don't think that's the problem. Also one thing I have not mentioned is that the voltage rag makes a high pinched buzzing noise, but only when its wired to the ps2 board, which I don't know if that's normal either

 

[Customledmods]

Disconnect the wires from the reg board and test all the voltages make sure they’re all good.

give the motherboard a good sanding I see some rough edges.

 

[Hili]

I would also recommend removing any components around the cutting edges

 

[Bill_The_Fish]

I haven't worked on this project for a long time now, but originally I thought my trimmed ps2 board was broken because my cutting and soldering work was pretty bad. After I got a new ps2, I decided to just cut a new board and start from scratch, but after I turned it on, it had the exact same problem. in my opinion this means it must be a bad voltage regulator board, or maybe I missed a connection somewhere (but I doubt it). I'm not sure what exactly could be wrong with the voltage regulator, the voltages coming out are perfect when the ps2 isn't hooked up, but whenever I turn it on it makes a high pitched sound from the board, but I don't know why yet. I did order enough parts to make 2 voltage regulators so I think I will just make another now that my soldering skills are a bit better.

Pictures of new ps2 trim:

 

[RobotJack12]

Hi Bill the Fish, I have that same voltage regulator board and had a terrible time with it, I destroyed five boards before I figured it out!
The breakthrough for me was using lead-free solder paste to attach the small circuits. After that, I finally started getting accurate readings. My specific problem was the TLV62130RGTR chips at locations U1, U2, and U3. I was getting bad readings on both the 3.3V and 5V lines, but once I resoldered those chips with the paste, the board started working correctly without the buzzing sound. You will need a hot air gun for those small parts, the paste will pull the parts into place. I also added a power LED to the trim PS2 board to make sure the unit was getting power I used a 3.3K resistor attached to the led positive line. I found a great spot for it: there's a 3.3V output right next to a ground check the PDF.
I also attached in the PDF the readings I'm getting now. I hope this helps with your troubleshooting!

Wonderway Sn42/Bi58 T4 Lead Free Solder Paste from Amazon.

 

[Bill_The_Fish]

Hi Bill the Fish, I have that same voltage regulator board and had a terrible time with it, I destroyed five boards before I figured it out!
The breakthrough for me was using lead-free solder paste to attach the small circuits. After that, I finally started getting accurate readings. My specific problem was the TLV62130RGTR chips at locations U1, U2, and U3. I was getting bad readings on both the 3.3V and 5V lines, but once I resoldered those chips with the paste, the board started working correctly without the buzzing sound. You will need a hot air gun for those small parts, the paste will pull the parts into place. I also added a power LED to the trim PS2 board to make sure the unit was getting power I used a 3.3K resistor attached to the led positive line. I found a great spot for it: there's a 3.3V output right next to a ground check the PDF.
I also attached in the PDF the readings I'm getting now. I hope this helps with your troubleshooting!

Wonderway Sn42/Bi58 T4 Lead Free Solder Paste from Amazon.

thanks a lot for the information, that should help a lot. Were the boards you powered with the faulty voltage regulator permanently destroyed after powering them? I ask because I'm wondering if I should start looking for a new ps2 to trim.