Remove MSX TurboR keys easily using a keycap puller

By Ivan

Ascended (9202)

Ivan의 아바타

12-10-2020, 12:09

Is it possible without disassembling the computer? The keys of my FS-A1GT have yellowed slightly (not much to be honest) and I would like to whiten them a bit using cream peroxide (40 Vol 12%). Has someone ever removed each key one by one?

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By Meits

Scribe (6050)

Meits의 아바타

12-10-2020, 12:56

Before I pulled them off I would want to know what effect this peroxide has on the plastic. Not all material survives as good as the other.
Just direct/strong sunlight for a few days does some bleeching as well. Worked for me on a synthesizer. You just need a summer for that.

By hamlet

Scribe (3271)

hamlet의 아바타

12-10-2020, 16:18

Summers gone.
LOL!

By Ivan

Ascended (9202)

Ivan의 아바타

12-10-2020, 16:51

Meits wrote:

Just direct/strong sunlight for a few days does some bleeching as well. Worked for me on a synthesizer. You just need a summer for that.

That's probably one of the easiest and effective ways to whiten yellowed plastic without applying any chemical substance.

Another easy and even more effective method is to apply oxygenated water (10 volumes, i.e., 3% hydrogen peroxide) with a cloth and leave the object under direct sunlight for a few hours. This is probably what I am going to do with my FS-A1GT (covering everything else except the slightly yellowed white keys).

By Ivan

Ascended (9202)

Ivan의 아바타

12-10-2020, 16:50

hamlet wrote:

Summers gone.
LOL!

Yes but at least lots of sun in the Mediterranean Tongue

By hamlet

Scribe (3271)

hamlet의 아바타

12-10-2020, 17:09

You can remove the keycaps easily. I did that time ago for a standard cleaning without harming the tR.

By Meits

Scribe (6050)

Meits의 아바타

12-10-2020, 21:01

I accidentally ran into this video today. Worth watching.

By Ivan

Ascended (9202)

Ivan의 아바타

12-10-2020, 21:43

That's it! Only sunlight plus, at most, oxygenated water with a low concentration of hydrogen peroxide (10 volumes = 3%).

My first idea was to apply cream peroxide (40 Vol 12%) but you need to remove the keys and it is not permanent and likely will be required to repeat over time (yes, unfortunately re-yellowing will occur). That means that after each application of that "heavy" chemical substance you are degrading, to some extent, the plastic. Not a good idea then.