Acidmods
Console Modding------ ( Here you can talk about your favorite Consoles ) => PS4 => PS4 Controllers/PS4 Rapid Fire Controllers => Topic started by: j_bogard on January 16, 2020, 02:47:06 PM
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Hello guys, I am working on a remapping DS4 buttons proyect for an arcade stick. Basically I made some mistake triying to connect the 8Kohm resistor between points 17 and 18 of the buttons flex ribbon circuit board connector of the JDM-011 board, so now i have no voltage for the R1 button and it behaviour is like it is pressed all the time. Is there some fuse or component that could I check for repair it?
Thanks a lot for any help! :beg:
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R1 is active Hi, so if it is acting like it is pressed then it's getting voltage from somewhere.
Desolder whatever you have done in there and see how it works.
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Thanks for the advice, but I already did it and still no voltage...
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The 3.2v that R1 uses powers most everything else in there as well, L1, L3, R3 the Sticks, so more than R1 has to have a problem if the 3.2v is missing. What else doesn't work?
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Sorry, I think I misunderstood the voltage measurement points. I must have voltage oscillating between 0 and 3.2V, between 16(R1 active high)/15(R2 Common) and 3.2V fixed between 16(R1 active high)/17(R1 Common) and I get those voltage correctly if I use points 2(L1 active high) or 9(ground) as reference so then the cable that I soldered to point 16(R1 active high) could be not doing good contact. That will explain the R1 no voltage problem between points 15/16 and 16/17. But then the behaivour of the R1 button always pressed could be an additional problem. Besides everithing else is working correctly, including analogs, R3, L3, etc... :wacko: My biggest problem is then that I don´t find why is R1 always pressed and I remember that this problem started while I was doing 8Khom resistor location tests.
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All voltage measurements need to be made with reference to ground, not between this and that points on the contacts. Use the #9 contact, or any other ground spot on the controller, for the common when taking measurements.
R1 will only activate if it gets voltage on the line, so either you have a short somewhere on that line to something, or another possible cause could be the Pull-Down Resistor for the R1 line has been knocked off, which can happen when the Right stick is removed.
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I think I found the problem... I don't know when It messed up... :cry2:
Some advice about this component? (https://www.acidmods.com/forum/MGalleryItem.php?id=2972)
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I seriously doubt it's causing your R1 issue.
Looks like it's a TC7710WBG for charging the battery.
It seems to be the same chip from the -001 to the -020 version boards, so you shouldn't have any real problems getting a replacement one from a salvage board, or some online source, but it is a BGA-25 package, so not something everyone is really setup to rework.
This is one I just pulled from a -020 here to have a better look.
(https://www.acidmods.com/RDC/DS4/Misc/DS4%207710%201434D.BMP)
(Also have an -001 board and it's marked 7710 331A4 on that one)
(https://www.acidmods.com/RDC/DS4/Misc/DS4%207710%201434D%20PCB.BMP)
There should also be no testing to see where the 8K Resistors need to go, they need to go between 3-4 then 17-18
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You are the expert, thank you very much for the explanation. :tup: I have no battery charging problems, so I must check again where the short circuit may be or what component might be broken.
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So I removed all my soldering work to find the R1 short circuit problem, but now I found that accidently at some ponit i lost 2 components.
Can I replace them? or should I give up with this board?
Thanks again... :cry2:
(https://www.acidmods.com/forum/MGalleryItem.php?id=2974)
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Going by that pic, top circle should be a Resistor, 100k, 0402 size. That one you need. Bottom circle is a Capacitor and it will be fine without it.
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Thanks a lot, I will install the new 100K resistor to check if pcb still working and R1 always active issue has gone.