Hope to get your help on my issue with AL-5021.

I’му done the sub mod as it’s explain here:
- replaced opamps to OPA2134
- replaced capacitors to better quality ones (and some of them with biger capacitance as recommended)
- used film caps for signal path
- replaced power supply to torroidal.

A few days or a week everything worked fine but then suddenly I lost timbre and volume control via remote unit of sub. In another one day the music has gone completely.
My friend -technisian diagnosed the TDA7433, basic audio-processor chip wich is used for volume/tone controll is dead.

I’ve found that rare TDA7433, we replaced it and my sub revived! Everything worked fine but not for long…
In a day or two I lost tone and volume control via remote (though light indicator of tone or volume level was working) and finally all the sub has shut up.

So I suspect the problem lies diper then just that chip. Probably I did something wrong in my mode, maybe bad soldering, shorting some leads or something wich causing TDA7433 to die.

Please advice, what would you check and test before replacing TDA7433 one more time.

Hope to get you replies,
Thank you

On each initial electric contact, the left-side produces sound but washed away then mute in instant.

Can u tell me the problem solving, please?

maksudnya gini..

wima
kaki A | Kaki B
Vishay mkp1837
kaki C | kaki D

kaki A wima disambung dengan kaki C vishay trus kaki B wima disambung dengan kaki D vishay,,setelah itu baru disolder ke kaki tweeter masing2 sesuai dengan posisi aslinya,,bener gak pak jimmy ?

trus ane beli vishay mkp 1837 0,01uf.buat bypass caps..
nah masangnya gimana ?
________
| |
| |
| WIMA |
|________|
| |
X——–X———- ke kaki tweeter A dan B
| |
| |
——–
| |
| Vishay |
| MKP1837|
|________|

X : bagian yg disolder n disambung,,

kaki tweeter A dan tweeter B tidak terpisah / tidak disambung.. maksudnya disolder ke tempat yg seharusnya di tweeter..

bener gak logika bypass caps nya om jimmy ? thx..:D

Kalo speaker ambil yang voltase paling kecil (100V).

Thanks.

trus klo saya mau coba wima mkp10 untuk passive XO..harganya lumayan murah sih..tp ms rada bimbang antara wima mkp10 atau mundorf mcap mkp..mnrt om jimmy bagaimana ?

ambil yg 100v, 250v , atau 400v..? apa benar semakin tinggin volt nya semakin baik reproduksi suaranya..

thanks..

kalau wima mkp10 bisa untuk caps passive xo gak om jimmy ?

saya mao coba mod satelit speaker edifier da5000pro..sorry oot..

didalamnya ndak ada crossover dgn inductor,, hanya ada 1capacitor aja di tweeter.. dan tweeternya ini kaki 3 (satu kaki – , satu kaki + , satu kaki dibypass ama caps)
[IMG]http://i1223.photobucket.com/albums/dd502/awi01/IMG00167-20110307-0122.jpg[/IMG]

caps nyambung ke kaki (-) dan kaki yg kosong satu lg..

kira2 berpengaruh dan worth it gak kalau diganti capasitor nya dng caps film yang lebih baik ? trus pakai caps apa ? diantara capitole , mcap mkp , bennic atau audiophiler…

Thanks.

Tone Kontrol mx5021 punyaku rusak, yang berfungsi hanya tombol on.off. Sementara ini untuk ini saya bypass langsung ke input amplinya. Gimana caranya modif agar On/Offnya di buatin skalar biasa saja?

Trims
Glo