QL rubber keypad sticking

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towmater
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QL rubber keypad sticking

Postby towmater » Thu Mar 01, 2018 7:31 am

I just came across a sweet QL, and have ordered a new keyboard mylar from the UK. A few of the keys, however, don't pop back after being pressed, it seems the rubber is becoming a bit stale.

My initial thought is to paint some rubber cement onto the rubber domes with the aim to make it a bit more resilient, although I'm not certain this will fix things. If that doesn't work I'm thinking of adding springs between the outer key and the rubber. Again, no idea if this will help.

Has anyone overcome this issue?

The QL also came with a 896K Trump Card, but no floppy drive. Can I use a Gotek?

Hopefully the system's NTSC output won't prevent PAL software running. I'm going to put together a SCART cable to see if I can convert to HDMI.


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vanpeebles
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Re: QL rubber keypad sticking

Postby vanpeebles » Thu Mar 01, 2018 7:49 am

Might be worth giving the mat a good wash in some warm soapy water :D


RWAP
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Re: QL rubber keypad sticking

Postby RWAP » Thu Mar 01, 2018 11:49 am

Normally, washing in hot soapy water and then rubbing the dry mat between your hands (to get some natural oil onto the rubber from your skin) fixes this issue.

I do have a pile of salvaged rubber mats though - price £4 each plus postage :)


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Dave
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Re: QL rubber keypad sticking

Postby Dave » Thu Mar 01, 2018 3:42 pm

They do get a bit gummy after a while and warm soapy water does help them. DO NOT let them come into contact with petroleum distillates, as this will destroy them. This includes things like WD40 and Vaseline. The material will break down very quickly.

If the QL has been in a sunny place the phthalates in the bubble mat evaporate. They lose their flexibility and start to become stiffer. Replacement is indicated.

From high school chemistry I understand a little bit of unbuffered wintergreen oil (methyl salicylate) mixed 3:1 with alcohol used as a soak for 5-7 days can help.


towmater
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Re: QL rubber keypad sticking

Postby towmater » Thu Mar 01, 2018 4:03 pm

Dave wrote:a little bit of unbuffered wintergreen oil (methyl salicylate) mixed 3:1 with alcohol used as a soak for 5-7 days can help.


...you had an interesting chem class. I think when the RWAP mylar arrives I'll do the wash suggestion, if that doesn't do the trick, I'll try the oils, thanks all for your help.


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Dave
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Re: QL rubber keypad sticking

Postby Dave » Thu Mar 01, 2018 4:06 pm

towmater wrote:...you had an interesting chem class.


There was a decided focus on alcohol. Oh, wait, that was college in general!


RWAP
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Re: QL rubber keypad sticking

Postby RWAP » Thu Mar 01, 2018 8:06 pm

towmater wrote:
Dave wrote:a little bit of unbuffered wintergreen oil (methyl salicylate) mixed 3:1 with alcohol used as a soak for 5-7 days can help.


...you had an interesting chem class. I think when the RWAP mylar arrives I'll do the wash suggestion, if that doesn't do the trick, I'll try the oils, thanks all for your help.


As I say, the natural oils in your skin always seem to be enough when I have had problems..


towmater
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Re: QL rubber keypad sticking

Postby towmater » Sun Mar 04, 2018 8:30 am

While I'm waiting for the keyboard mylar, I pieced together a SCART to HDMI setup. I have no idea if the Gotek will work yet.

Does anyone have an opinion about the Trump revision 1.2a? I have found a 1.36 revision on the web, and could update the rom if it is worth the trouble.

No idea whereCare/Qjump is, hopefully not in the same eprom as Trump 1.26, as that could complicate things.
2018-03-04 00.03.24.jpg


dex
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Re: QL rubber keypad sticking

Postby dex » Sun Mar 04, 2018 11:12 am

Yes, the Toolkit is part of Trump card ROM.


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Dave
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Re: QL rubber keypad sticking

Postby Dave » Sun Mar 04, 2018 4:45 pm

The Gotek works. :D



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