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Guest ionutm

oscilator quartz

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am un mp3 player pro2 cu S5L840f care are cristalul de quatz cu un pin rupt si nici nu scrie pe el valoarea,am cautat datasheetul chip-ului si am vazut ca ar fi o val de 121.5mhz,se gaseste pe piata val astea?unde?

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pai cam aici este problema,chiar s-a rupt direct de la iesire si nu am cum sa il carpesc,am incercat eu si sa il pilesc usor dar in zadar,partea proasta e ca nu ii stiu valoarea fiindca era stearsa de pe cristal.

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Am gasit aici PDF-ul

http://www.datasheetarchive.com/search.php?q=S5L840F

 

32.768 KHz e frecventa de ceas adica demultiplicat cu 2^n da secunda.

Nu cred ca lucreze la frecv asta procesorul, dar nu e exclus sa aiba un oscilator de ceas.

 

121.5mhz, frecv asta e prea mare, nu exista cuarturi, exista niste rezonatore piezo ( care arata tot ca cuartul)

 

Frecventa acelui cuart e critica, adica nu poti pune valori apropiate.

Nu stiu de cat e.

 

Eu zic ca cea mai buna ideie e sa lipesti piciorushul rupt. Ce daca s-a rupt din "radacina" se poate lipi de un fir subtire.

 

Sau, daca preferi il poti masura punandu-l intr-un oscilator si masori cu un frecventzmetru f. bun. Faci contact cu ceva subtire de pinul rupt.

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