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02-19-2012, 03:29 AM   #1
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molette pentax kr

Bonjour,
La molette de mon kr est défectueuse, quand je veux changer les valeurs (iso, f ou vitesse) elles défilent sans ordre logique, montent, descendent. Bref les réglages en mode manuel sont tres compliqué.
Avez vous dejà eu ce problème ?
Que faire ? Mon boitier a déjà un an et je n'envisage pas trop de m'en séparer 3 semaines pour un retour SAV
Merci de vos conseils

02-19-2012, 03:47 AM   #2
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I don't speak French, but I machine translated your post. Hopefully you can do the same. You need to spray a small amount of contact cleaner on the dial to fix it. This happened because the dial had too much grease, but it's easy to fix. Apply a little contact cleaner to it, and then rotate the wheel for a few minutes in each direction. Repeat if needed, but avoid using too much.

Be sure to use only a clean drying contact cleaner - one that leaves no residue.

Hope this helps.
02-19-2012, 09:51 AM   #3
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Original Poster
Thanks for you'r answer.
Where i can buy contact cleaner ?
Thank you so much !
02-19-2012, 10:01 AM   #4
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QuoteOriginally posted by popt Quote
Thanks for you'r answer.
Where i can buy contact cleaner ?
Thank you so much !
WD-40 specialist rust release penetrant will do the job,
there is many more on the market , you will be able to purchase from any good hardware store ,DIY store or automobile store.

P.S.
Remember just to use a very tiny amount of the spray!

02-19-2012, 11:37 AM   #5
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QuoteOriginally posted by Malfunction Quote
WD-40 specialist rust release penetrant will do the job,
there is many more on the market , you will be able to purchase from any good hardware store ,DIY store or automobile store.

P.S.
Remember just to use a very tiny amount of the spray!
Definitely don't use WD-40, it leaves a grease residue behind that can really cause problems. Radio Shack in the US sells a silicon based electrical contact stuff of some kind that should be appropriate - go search electrical shops i think.
02-19-2012, 02:00 PM   #6
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WD40 is about the worst thing you could use. I wouldn't suggest a silicon based lubricant either. To fix this issue you don't want a lubricant, you want a solvent - that's what a contact cleaner is. It needs to dry without any residue at all.
02-19-2012, 04:54 PM   #7
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QuoteOriginally posted by Philoslothical Quote
WD40 is about the worst thing you could use. I wouldn't suggest a silicon based lubricant either. To fix this issue you don't want a lubricant, you want a solvent - that's what a contact cleaner is. It needs to dry without any residue at all.
I mentioned WD-40 "specialist" rust release penetrant,(FAST DRYING AND NO MESSY RESIDUE ) not the ordinary WD40
02-19-2012, 05:10 PM   #8
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Even so, why? Why use something designed for rusty machinery when the correct product exists for cleaning electronic contacts?

QuoteOriginally posted by popt Quote
Where i can buy contact cleaner ?
If in doubt about the contact cleaner you get, test it by spraying a small amount on glass. If it leaves a noticeable residue when it dries, don't use it. You can buy the correct kind of cleaner from an electronics dealer, a computer shop maybe, or somewhere online like Ebay.

02-19-2012, 06:08 PM   #9
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QuoteOriginally posted by Philoslothical Quote
Even so, why? Why use something designed for rusty machinery when the correct product exists for cleaning electronic contacts?
Its good for Arthritic knees too i hear ha ha ha
Yep your right , will be able to get something much cheaper as well
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