Elektronikci Arkadaslar Yardim

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Arkadaslar Tascam 122 MK II 3 kafa kayit cihazimda bazi problemler var. pitch control potansi deger kaybetmis (hizli okuyor) potansi soktum uzerin hicbir deger yazmiyor sorum orjinal degerini nasil bulabilirim nette biraz arastirdim (adjustable from about 25K to 125K) tam deger lazim bana. ona gore siparis vermek istiyorum 4 bacakli.
ikinci problem ise bu cihazin uzerinde Direct drive motor bulunuyor PCB boardindaki kondastorler kurumus ve kondastorler cok farkli aluminum electrolytic kondastor kulanilmis. birtanede ceramik chip 10mf.16V (C5) kondastor bulunuyor, bunun yerine polyester kondastor kulansam bir sakincasi olurmu?
ve diger 6 kondastorleride normal kondastor ile degistirmek istiyorum? motor devir sesini parazit olarak yansitirmi?
Tesekkurler




Buda pitch control PCB



DD Motor



Motor shemasi

[Yiğit G.]

şu arkadaşla iletişime geç sana yardımcı olacaktır..

http://forum.donanimhaber.com/showPr...?memid=1876220

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saol dostum

[Yiğit G.]

ne demek .

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Arkadaslar tesekkur ederim halletim sonunda konu silinebilir.Potans onemli idi benim icin (degeri)
Chicago Illinois Teac/Tascam'da calisan bir muhendise ulastim dun sagolsun tam degerlerini gonderdi.

The Pot is a linear 100K pot with a 40% tap. I don't think you will ever find it in that original configuration. I never did.

What I did do is put a 25mm shaft length 100K linear panel mount pot in the unit- The one I selected was a plastic
conductor linear. It had a round shaft and so I ended up using a different knob. I think the correct part will be a 30mm
shaft length with a D end on it and the bushing size is important as the original is not at all standard 1/4" but something
smaller which required drilling the hole larger. It is not at all an easy job also requiring the cutting of the Board with a dremel bit to allow it to fit in place. The original part was a very cheap part type. The 40% tap was simply a resistor value placed
on the board with a resistor- when I was done the unit worked great. The Pot I put in was a 1,000,000 operation pot much
better than the one they used. Theirs was about 10 cents, the pot I put in was $4.00 US.

I wish I had a better solution but the one solution I came up with worked but was not as perfect as I would have liked.