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Sonnyeva radionica 
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i od živaca napravio to nabrzinu ;)

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Sat Nov 05, 2011 6:21 pm
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Neznate vi što može naš Pero sve napraviti....

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Sat Nov 05, 2011 6:22 pm
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Eeeeeeeeeeeeeeeeeeeeeeeeee....
Ma popravit' ćemo i taj nedostatak, samo da nađemo odgovarajuće imbus vijke...

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Sat Nov 05, 2011 6:47 pm
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Idemo dalje u revijalnom tonu :D
Ovo mi se jedino dalo slikati...
Lagani refresh jednog sada već starkelje...

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/dsc01.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/dsc02.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/dsc03.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/dsc04.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/dsc05.jpg[/img]

Kada sam ga otvorio i pustio da radi, nisam mogao vjerovati kako to može loše svirati...
Što je i bio problem zbog kojeg sam ga dobio na popravak...
Ništa što lagani tuning i podešavanje ne može riješiti :D
Na svu sreću, jer je integrirac sigurno dobavljiv :lol:
Žao mi je što nisam slikao prije da se vidi prst prašine u unutrašnjosti, kao i nakupine masnoće i svega ostalog izvana...
Uglavnom, raskopavanje do zadnjeg vijka, temeljito pranje, sušenje i slaganje... 4 dobra sata rada bez prestanka...
Uglavnom, rezultat je na gornjim slikama....
Good as new...
A takav je sada i zvuk....

Sutra me čeka isto takav refresh equilazera iz istog kompleta...

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Wed Nov 16, 2011 11:00 pm
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oš refreshat marantz cd plejer :lol:

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Wed Nov 16, 2011 11:03 pm
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čuvaj ga se, ima par pločica za tube buffer vška...da nebi slučajno nekakva žarulja završila u njemu :D

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Wed Nov 16, 2011 11:05 pm
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auuuuu bio mi je pričao o tome davnih dana :D

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Wed Nov 16, 2011 11:07 pm
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Upravo...
Nikakav refreš ne priznam u CDPima ako ne zaguramo kakvu lampu unutra...
Pa makar da samo spojim grijače, pa da blešči...
Odmah i CDP svira duplo bolje :lol:

Davore, može, ali tek za par tjedana :D Nažalost imam hrpu zaheba koji čekaju red... Došli su konačno na naplatu :D

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Wed Nov 16, 2011 11:09 pm
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:D :D :D

može, nije ništa hitno...

fala :)

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Wed Nov 16, 2011 11:14 pm
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Evo i ekvalajzera :D
Stanje before :

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00866.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00868.jpg[/img]

Koliko ima prljavštine vidi se najbolje po displejima... Before :

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00869.jpg[/img]

After :

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00870.jpg[/img]

I stanje nakon temeljitog čišćenja i pranja... To je sve što je trebalo raditi... Ne mogu vratit pojačalo uglancano a ekvalajzer pustit prljav :lol:

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00876.jpg[/img]

Dva načina rada :D Bar i dot... Aha, a gdje ste sad :lol:

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00884.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00886.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00887.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00888.jpg[/img]

I zajedno s pojačalom....

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/Popravci%20razni/DSC00891.jpg[/img]

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Mon Nov 21, 2011 9:01 pm
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Već duže vrijeme radim na JVC ojačevalniku...
Već sam izgubio oči i mirnu ruku :D

Dakle JVC A-X50...

Prvo motorizirani potenciometar !!! Početak proizvodnje 1982.
Zaglavio je motor... Odnosno ne radi uopće....
Raskopavanje, čišćenje kolektora na kojem je bilo toliko oksidacije da nije bilo kontakta između četkica i kolektora...
Usput popravak i jednog slomljenog kontakta....

[img width=800 height=597]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika02.jpg[/img]

[img width=800 height=597]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika03.jpg[/img]

[img width=800 height=597]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika04.jpg[/img]

[img width=800 height=597]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika05.jpg[/img]

I zatečeno stanje...

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika006.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika007.jpg[/img]

Mislio sam da ću se samo tako " izvuć' " :D... A ne, ne, nema fuša...

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Thu Nov 24, 2011 9:55 am
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Sve dolje i u kadu s tim...
Koliko sam vijaka skinuo i konektora otkopčao, mislio sam da ga nikad neću složit nazad :lol:

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika008.jpg[/img]

Oprano sve, osušeno i spremno za nastavak...

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika009.jpg[/img]

Godine su učinile svoje, pa je trebalo promijeniti hrpicu elektrolita...

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika012.jpg[/img]

Zašto ? Evo zašto.... Usporedba ESR-a starog i novog konda...

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika014.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika015.jpg[/img]

Skinuti i izlazni tranzistori i zamijenjena pasta koja više i nije bila pasta :D

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika013.jpg[/img]

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika016.jpg[/img]

Izmjenjeno stanje pločice...
Za OPamp je došlo podnožje tako da se može zamijenit drugim po želji...
Zbog toga je jedna wima malo u koso... Ne stane drugačije zbog podnožja...
4558 je trenutno zamijenio TL072... U svakom slučaju bolje radi...

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika017.jpg[/img]

I sklopljena velika većina....
Trenutno imam problema s dijelom ekvalajzera...
Kad je na defeat sve je OK, kad se ukopča on, počne zviždanje, osciliranje, čudesa ukoliko nema signala na ulazu...
To ostaje danas riješiti, nadam se....

[img width=800 height=439]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika018.jpg[/img]

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Last edited by sonny on Thu Nov 24, 2011 10:04 am, edited 1 time in total.



Thu Nov 24, 2011 10:02 am
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tak se radi :respect:
dobar je to amp,u svakom slučaju isplati ga se refreshat :), pogledat ču ti za kondiče u napajanju na furdi,sad vidim i kakvi su :D
LP

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LP


Thu Nov 24, 2011 10:07 am
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Već sam stavio 10000 / 63V
Ako sučajno naletiš na nešto pametno, će da zamijenimo...

Promjer 35 mm, visina 65 mm, raster od 18 na dalje...
Visina može biti i veća...
Promjer može biti malo veći...

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Thu Nov 24, 2011 10:25 am
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Ajmo dalje....
Riješen problem s EQ-om zamjenom problematičnih OPampova...
Opet u podnožja, za buduće tweakove ( ako ih bude )....

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika19.jpg[/img]

Usput promijenjeni i kondovi za ovo lokalno napajanje...

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika20.jpg[/img]

Kakve đinđe iz osamdesetih :D
Zamijenjene, naravno, i izgorene sijalice, pa da svijetli :D

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika21.jpg[/img]

Mrzim ove obične grafitne trimere jer nikad ne možeš poštelati struju mirovanja kako treba... Zato multiturn na mjesto starih...

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika23.jpg[/img]

I podešena struja po manualu ( 9 - 13 mV )... Kud baš pogodim 11,3... To je bilo u fazi grijanja.... Konačno je 12 mV....

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika22.jpg[/img]

Perem ko' pravi :lol:

[img]http://i442.photobucket.com/albums/qq150/sanjins/Elektronika/JV%20A-X50/slika24.jpg[/img]

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Thu Nov 24, 2011 10:46 pm
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