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Console Modding------ ( Here you can talk about your favorite Consoles ) => PS4 => PS4 Controllers/PS4 Rapid Fire Controllers => Topic started by: LSL on November 11, 2019, 06:51:34 AM

Title: Touchpad(JDM-030) with short circuit
Post by: LSL on November 11, 2019, 06:51:34 AM

Hi!

This JDM-030 doesn't sync and doesn't recharge. I found 2 capacitors with short (C1 and C2).

Could you help me with the values of them? The touchpad works without these capacitors, but I want replace them.


(https://i.postimg.cc/WdNSZKSQ/rect4149.png) (https://postimg.cc/WdNSZKSQ)

Title: Re: Touchpad(JDM-030) with short circuit
Post by: RDC on November 12, 2019, 06:42:40 AM

I took a couple JDM-030 apart here, as well as a couple other versions, and none of them had that version TP board in it, so I can't get you the exact values, but I doubt they are anything more than a couple of decoupling caps. I'd just put something like a 1uf and an 0.1uF in there.

Title: Re: Touchpad(JDM-030) with short circuit
Post by: LSL on November 12, 2019, 07:07:36 AM

Thanks RDC!

So should I put 1.1uf (1uf+0.1uf)?

I will search for the IC datasheet to make sure the other capacitors (C3 and C4) have equal values.

Title: Re: Touchpad(JDM-030) with short circuit
Post by: RDC on November 12, 2019, 07:25:31 AM

If the chip is the MXT112, good luck finding the DS. If it's something else please let me know, as all the TP boards I have hare use the MXT112 chip.

Correct, 1.1uF total, but anything at all would really work from 1nF to 10uF if it's just for some decoupling. I doubt they are doing anything else, as it would mess with the TP with them missing.

Title: Re: Touchpad(JDM-030) with short circuit
Post by: LSL on November 12, 2019, 07:52:31 AM

I guess isnt MXT112 chip because it's has a different package from another TP IC comparing with JDM-040's TP.

Soon I will telling you if this chip is a MXT112 or not, probably tomorrow.

Thanks!

Title: Re: Touchpad(JDM-030) with short circuit
Post by: LSL on November 13, 2019, 08:26:01 AM

It is a mXT112S.  :cry2:
(https://i.postimg.cc/1VNhz3Lh/P-20191112-232927.jpg) (https://postimg.cc/1VNhz3Lh)

I found 2 datasheets: mXT144U and mXT224.

On mXT224's datasheet, pages 7 and 8, shows an association with 100nF and 1uF, the same you said yesterday.

On mXT144U's datasheet, page 9, shows 2 associations: 22nF + 2.2uF and 22nF + 1uF.

I will remove C3 and C4 capacitors to check respectives values and compare them with the datasheets.

Title: Re: Touchpad(JDM-030) with short circuit
Post by: LSL on November 14, 2019, 07:07:23 PM

C3 = 100nf
C4 = 1.5uF

I will put same values to C1 and C2.

Title: Re: Touchpad(JDM-030) with short circuit
Post by: LSL on December 16, 2019, 10:19:47 AM

The same problem, same board, same TP:

https://youtu.be/ICn3RPxeQYU?t=559