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DANELECTRO ENVOY SCH

AUDIO - SERVICE MANUAL
Type: (PDF)
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1
Category
AUDIO
SERVICE MANUAL
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Relevant AUDIO forum topics:
Grundig WKC automagnó
Sziasztok ! Ez egy WKC 3300 RDS magnó , calkuláltam neki kódot , de nem eszi ! GR1028Y0135641 gysz : 0962 jött ki ! Nem valószinü hogy át lett égetve , mert még rajt van a garos cimke ! Megköszönném ha valaki megpróbálná !! lehet hogy az én progim nem jó !
Technics SU-8080 erősítő jobb oldal torzít _Megoldva!
40 éves készülék, régi vágyam volt, most megvan. A jobb csatorna torzít. Ha a bemenetre színuszjelet adok, a jobb csatorna jelalakjának alja torzul. Az előrerősítő modul potijain állítva a jelalak felveszi a színuszt, de ha növelem a hangerőt , akkor ismét torzul a kimeneti színusz alsó hulláma. Ötleteket várok, és mindenképpen írom a végeredményt. A végfokot ellátó 2-2 db 10.000uF elkó mindenképpen cserélve lesz már úton vannak. 

Hiba oka. A végfokhoz A,B,C,D,E pontokon csatlakozó “Power limiter”  áramkörben zárlatos volt a 2SA777 pnp tranzisztor, és az egyik MA150 dióda. Emiatt ez a szabályzó áramkör fals jelet vitt a vegfok jelébe. átmeneti megoldásként, a tranzisztort BC327-tel, ( más éppen nem volt ) cseréltem, a dióda is cserlve lett. Hibátlanok a jelalakok. 
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
Meazzi 777 torzít
Sziasztok Fórumtagok! esetleg kapcsolási rajza valakinek ehhez?
Én nem találtam a neten! Régi. Az van hogy torzít kicsit recsegve meg halk is!
A vég és meghajtó tranyók műszerrel mérve jónak tünnek. Talán valamelyik kondi lenne a hunyó? 
Rajz nélkül nehéz meg nehezen is szerelhető! Előre köszi a válaszokat! Sziasztok
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