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Guest xti000

Motor "lenes" la un Video Recorder

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Guest xti000

AM mai discutat despre respectivul VCR si aici: http://www.elforum.info/viewtopic.php?t=10410



Problema s-a petrecut in felul urmator:

Am bagat o caseta, si cand am dat play, a inceut sa meraga cu viteza destul d emare (identica cu derularea pe play). dupa 4-5 secunde de functionat asa, toata hardughia s-a oprint si VCR-ul a intrat in Stand-By. Daca il porneam, dupa 3-4 sec iar intra in SBy. L-am desfacut si am observat ca motorul cere se ocupa de toata mecanica (eject, derulare, play etc) a devenit lenes. La modul ca are nevoie de un impuls dat cu degetul ca sa porneasca, la Play, abia se taraie si merge in hopuri. Parca n-ar avea curent destul. Am masurat toate tensiunile care ies din sursa si par OK, conforme cu manualul. DIn cate am observat motorul este unul pas cu pas.

Astept alte pareri, ca eu nu-sh ce sa-i mai fac :(




PS: mentionez ca de la beleua cu alimentarea este prima data cand am vrut sa-l folosec cu caseta, pana axcum utilizam numai tunerul.

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Guest xti000

Am mai sapat putin pe net si am gasit asta:


VCR NATIONAL NVH75 Drum Servo Pulses In Speed. C10028 (330uf/35v) Faulty. Noisy +5 And +6v Power Rails.




VCR NATIONAL NVH75 No Drum Or Capstan Lock, Interferance On Ee Picture Repalce C1028 330/25v (use 105 Deg Cap) In Psu, It May Read Ok



Ce inseamna chestiile alea bold-ate?

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Guest mister_rf

Noisy +5 And +6v Power Rails.

Zgomotos- deci zgomot (riplu) pe liniile de alimentare (tensiunile) de 5V si 6V


use 105 Deg Cap In Psu, It May Read Ok

A se folosi capacitati cu temperatura de lucru 105 grade celsius in PSU-(sursa de tensiune)-A se schimba capacitatile chiar daca masurate sunt OK (indicatia capacimetrului este ok). :yawinkle:

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Guest xti000

Multumes, am rezolvat pana la urma.Am desfacut aparatu', l-am invartit pe toate partile, l-am ansamblat la loc si am avut placuta surpriza sa-l vad functionand. N-am ideea ce a avut. :drinkers:

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