Service manuals, schematics, eproms for electrical technicians

USSR ABAVA RP-8330 SCH.

AUDIO - SERVICE MANUAL
Type: (DJVU)
Size
26.4 KB
Page
1
Category
AUDIO
SERVICE MANUAL
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    USSR ABAVA RP-8330 RP8330 SCH. RP 8330
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Relevant AUDIO forum topics:
Pioneer VSX-323-K nincs hang
Sziasztok!

Adott a fenti Pioneer VSX-323-K erősítő. Villám kárral érkezett hozzám, a HDMI porton kapta a végzetes ütést a set-top boxon keresztül. A HDMI hibát elhárítottam a HDMI switch ic csrerével. Viszont nem ad ki semmi hangot egyik csatornán sem, nem jelennek meg a kijelzőn a hangszóró ikonok. További méregetés és a HDMI panelen lévő micom ic is zárlatosnak bizonyult (EPF025A). Természetesen ezt is be lehet szerezni, csak üresen, programozatlanul.
A kérésem az lenne, ha valakinek a fenti tipushoz lenne-e firmware pakkja. Sajnos a neten sehol sincs, a pioneer support oldalán sem.
A programozást megoldom valahogy (beeprog vagy a gyári soros porton keresztül)
Esetleg mas típus is szóba jöhet, amiben ez a micom ic van, HT-072/073, VSX-324 stb. 
Ha valaki tud segíteni, szívesen várom!

Előre is köszönöm!
Tom

 
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
Kapcsolási rajz KENWOOD KRF-V4070D sürgős
Sziasztok! Kapcsolási rajzot keresek az alábbi típushoz : Kenwood KRF-V070D erősítő. Sajnos valami elszállt benne, valószínűleg egyik ic stb. Aki tud segítsen. Köszönöm
Akai AA-V405 nem kapcsol be (Megoldva)
Sziasztok Hozzám került egy a címben szereplő erősítő. Sajnos a trafó előtti részét teljesen szétszedték kibelezték. Így a primer oldalon van 6db vezetékem amit nem tudok hova kötni. Ha esetleg valakinek lenne egy rajza, vagy egy ilyen készüléke amiről csinálna pár képet azt nagyon megköszönném. Segítségeteket előre is köszönöm. További szép napot. Miklos2peter
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