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LORENZ 21W CZ 1946 SCH

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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    LORENZ CZ 21W 1946 21
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Relevant AUDIO forum topics:
ONKYO TX-DS494 low volume problem solving experience
Hello. here is a message to share my experience in solving a problem that appeared on the home-cinema amplifier ONKYO tx-DS494. In order to sell this amplifier I had to check if all the outputs and all the functions works properly. On the back of this amplifier you have to frontal output : A and B. I connect a pair of speaker on A output : no problem. I can adjust volume. when i connect the pair to the b output and turn the volume knob no sound came out of the speakers until I reach a level defined by I don't know what. :hmmm: My volume level goes from 0 to 80db ( if I remember well ). from 0 to 23 db no sound and when I reach 24 dn sound increase and stabilize. With hearphone connected, i don' have this problem so I conculde that amplifing transistor could not be incriminated. I checked on the service manual and saw that there are two or three component that could be the source of the problem : the main processor, some capacitors on the output PCB and relays. I began testing capacitors: no pb. then I thought that if cannot be the main proc because it ( I think ) works in a binary mode: it works or it doesn't. so I decided to switch between themselves the two relay and :super: : it works. The relays was in fault and did not switches properly. here is my experience in repairing an amplifier
Autós erősítő működtetése hálózatról .
Szervusztok ! Egy munkatársam egy autós 12volt-tal működő erősítőt szeretne lakásban üzemeltetni . Megkért hogy készítsek hozzá egy tápegységet .Annyit tudok az erősitőröl , hogy 300W-os /még nem vásárolta meg / . Szerintetek milyen tápegységet kellene hozzá épitenem .Még soha nem találkoztam ilyen feladattal .Ehhez kérném a segitségeteket . Amit előre is köszönök . Üdv . gabicsizi
Beag készülék azonosítása
Sziasztok! Szeretnék többet megtudni a csatolmányban szereplő hallgatókról. Teljesen újak,van több darab is. Üdv:Geri100
Aiwa RX-30 -ban a 3SK73 helyettesíthető-e BF964-el? És hangolási hiba.
Sziasztok! Egy Aiwa RX-30-at javítok, tuner-hibás. A 3sk73-ra terelődött a gyanú. Az volna a kérdésem, mivel semmit nem találtam róla, hogy helyettesíthető-e pl. BF964, vagy BF966-al? Persze, megfelelő lábelrendezés után. Köszönettel Attila
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