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 Post subject: Dead pads
PostPosted: Sat Jan 06, 2018 9:27 pm 
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Hi,
New here. I've just taken delivery of a second hand sp404sx. It was sold with a few issues.
The isolation button Works / doesn't illuminate
Lo-fi Doesn't work / doesn't illuminate
Bank B/G illuminates / doesn't work
Pads 3, 7, 11 illuminate / don't work at all on any bank.

Is there anything anyone can recommend looking for to bring the pads back to life please? I've stripped It apart and used 99% alcohol on the pcb to no avail.
Sorry if this is in the wrong forum and thanks in advance for any advice offered.

-Tom-


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 Post subject: Re: Dead pads
PostPosted: Sun Jan 07, 2018 7:52 am 
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do sp 404 pads work via buttons presses or those contact strips things. Ive never built up the courage to really take it apart and I cant find any images online of the inside of one of those things.


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 Post subject: Re: Dead pads
PostPosted: Sun Jan 07, 2018 6:39 pm 
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Lou- wrote:
do sp 404 pads work via buttons presses or those contact strips things. Ive never built up the courage to really take it apart and I cant find any images online of the inside of one of those things.


Hi Lou
They work via contact. The underneath of the pad has 2 X C shaped bits of rubber membrane (at least I think it's rubber) I've tried giving each button a good whack and also adoing a foil strip to both Pieces of membrane on one of the faulty pads. Also cleaned the the pads and pcb with 99% alcohol. I think they're contacting fine. Wondering if anyone has sent theirs away for repair.and the costs incurred?
Thanks for the interest.


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 Post subject: Re: Dead pads
PostPosted: Mon Jan 08, 2018 8:25 am 
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yea id say to give that a try, i know some peeps here have gotten replacement membranes for the pads. Looks a bit pricey from the support page im lookin at so you go ahead and decide if you want to do that yo.


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 Post subject: Re: Dead pads
PostPosted: Mon Jan 08, 2018 9:02 pm 
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i remembered there was a thread about it... here it is, hope it helps

http://sp-forums.com/viewtopic.php?f=1&t=15035&hilit=pad+fix

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 Post subject: Re: Dead pads
PostPosted: Wed Jan 10, 2018 1:20 am 
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Thanks for the replies guys, I really don't think it's a contact issue as ive cleaned the pads and pcb. I've spoke to a friendly chap called John who deals with out of warranty repairs for Roland. Here is his reply to my initial email outlining the same faults as in the original post.

It's likely a data line that scans the switches you mentioned is missing. Whether this is due to a break in the circuit or a faulty component is hard to say at this point so difficult to give you a cost. However to give you some idea, if it was due to a broken data line that could be reasonably easily traced the cost would be around £50 plus return carriage.

Looks like she's going away.


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 Post subject: Re: Dead pads
PostPosted: Sun Jan 14, 2018 5:18 am 
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Just to throw my .06 cents into the pot here. For you and future searchers of 'dead pads"
just cleaning the pad membrane and board wont fix a contact issue. I have had great results using CRC Dry Graphite Lube for fixing bad contacts on my electribes and I believe I used it on my sp-505.
I take a fine tip paint brush (like you get in a water colors kit) and spray the CRC into a sandwich bag. Then paint (re-paint) the carbon back onto the membrane (only the black parts).

To verify if it is a fault of the pads you can turn it on while it is opened (or put it together without the membrane in it) and use a wire to touch the top half of the connection to the bottom connection of the board and see if it reacts as a pad was being hit.


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 Post subject: Re: Dead pads
PostPosted: Mon Jan 22, 2018 9:14 am 
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Instead of sending it to get repaired, use this stuff called Caikote. Take the rubber pad thing out and paint Caikote along the edges of the buttons that aren't responding, just make sure not to connect the paint between any two buttons or they might interrupt each other. I used this stuff to fix my 404 when a bunch of my pads weren't responding. good luck

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 Post subject: Re: Dead pads
PostPosted: Mon Jan 22, 2018 12:01 pm 
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I'm affraid this is the only way to solve the problem of dead/loose pads for og404 : Roland Europe told me new pads aren't available anymore...

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 Post subject: Re: Dead pads
PostPosted: Fri Feb 02, 2018 3:35 am 
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http://www.instrumentalparts.com/51000006879.html


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 Post subject: Re: Dead pads
PostPosted: Fri Feb 02, 2018 12:08 pm 
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LOFI NEEDLEZ wrote:
http://www.instrumentalparts.com/51000006879.html

Pads for sx AND og ? How to deal with the "fonction" pad on the og404 ?

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 Post subject: Re: Dead pads
PostPosted: Sat Apr 28, 2018 7:18 am 
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Hey there. i m new on the forums, but i have been reading for quite some time , and i ve found great help from you guys and gals in various problematic situations in my adventures using my sp404
Now is my turn to grin about 5 or 6 pads and buttons on my 404 that dont work properly.
well a friend suggested using alluminum foil to put right between the pads and the connections on the motherboard.

Should i? any1 tried that as a perm fix?
Theres also another dude saying that a pencil can be used to just pain t over the connections. I suppose i should not screw with those so i dont "perm fix" my pads for good... or is it OK?

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