Service manuals, schematics, eproms for electrical technicians

NATIONAL RX-4960F SCH

AUDIO - SERVICE MANUAL
Type: (ZIP)
Size
1.3 MB
Page
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Category
AUDIO
SERVICE MANUAL
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    NATIONAL RX-4960F RX4960F RX 4960 4960F
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Relevant AUDIO forum topics:
Orion HS280 hangváltó bekötése
Szervusztok! Kérdezem, hogy a csatolt ábrán (280-as felső ábrák) az LB sugárzóhoz tartozó elkó bekötése melyik ábrán helyes? Az eredeti panelon az LB1031-hez tartozó elkó úgy van szitázva, polarizálva és beültetve ahogy a 4Ohmos változat rajzán látható.
Samsung MAX N54 torz hanggal
Sziasztok! Javítok egy fent leírt típusu minihifi-t! A készülék torzan és halkan szól minden forrásról. A végfok egy STK 402-090, amire már torz jel jut. Tudna valaki segíteni esetleg valami dokuval, ötlettel? Az STK 100% jó, kipróbáltam külső jelforrással. Előre is köszi a segítséget! Gabi
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
Samsung RCD-S50 hordozható CD- s rádio AM-en, és FM-en is csak zaj van
Üdv!

Lenne egy ilyen rádio.

A kijelző szerint hangol, de nem fog egy adót se úgy FM-en mint AM-en .
Mi lehet a bibi?
Kösz

https://elektrotanya.com/samsung_rcd-s50_sm.pdf/download.html
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