Service manuals, schematics, eproms for electrical technicians

ELTRA HIFI-1038 1969 SCH

AUDIO - SERVICE MANUAL
Type: (ZIP)
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351.6 KB
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Category
AUDIO
SERVICE MANUAL
If you get stuck in repairing a defective appliance download this repair information for help. See below.
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  • Also known:
    ELTRA HIFI-1038 HIFI1038 1969 HIFI 1038
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Onkyo A8630 nem mukodik a bemenetvalasztas
Sziasztok. A cimbeli erositovel szenvedek. Hibasan vettem, csak az egyik bemenetrol mukodott. Mikor levettem a tetejet, lattam, hogy a bementvalaszto ic at van kotve. Rendeltem egy masikat, de ez sem akar mukodni. Mintha teljesen halott lenne, nem megy at a jel rajta - nincs egy bemenet sem kivalasztva. +- tapfeszek megvannak, a kapcsolat a kontrollerrel pin to pin leellenorizve. Nincs tobb otletem, szerintem 2 lehetoseg maradt: vagy a bementvalaszto ic halott, vagy a kontroller, bar a kivalasztott bemenetnek megfelelo ledek kigyulnak. Volt valakinek hasonlo esete?
Melódia, M-10 áthangolása
Sziasztok!
Ugyan nem HI-FI, de rádió... Behoztak egy M-10-es (csöves) rádiót egyrészt "gatyába rázni", másrészt megoldani, hogy fogja a CCIR sávot. Nos, a gatyában már benne van, szépen működik, és az OIRT normán is jön egy adó. (Skálahúrozás, beragadt tengelyek, csúszkák, potik javítása, elkötések javítása után állt helyre.) Arra gondoltam, hogy egy 27Mhz-es keverővel oldom meg a kérdést. Annak idején sima ügy volt, de az igazság az, hogy azok nem csöves gépek voltak. Egy TO 42-vel felépített keverővel, aztán egy autórádióhoz használt keverővel próbálkoztam, de semmi eredmény ... Tudna valaki segíteni?
köszönettel:
Attila
DENON PMA 480 R
DENON PMA480R erősitőhöz keresek kapcsolási rajzott
repair sony amplifier str-de254
Want to share: Have downloaded the schematics from this forum to help repair the amplifier of a friend. Turned out that Sony decided to route the earth through the chassis, even the earth between the various supplies. When one takes the main board out of the chassis and switches the amp on, there are up to 20 volts difference between the eart (and hence reference) of the pre-amps and the main amps. Luckily the amp goes into protection but from a design point of view it is not nice to rely on screws and aluminum face plates to conduct up to 0.2 amps of current from one supply to another. What I did is solder wires to every eart point and connected them on the main board to make it stand alone and not rely on conducting current through the chassis anymore. Bad design, simple repair but took some digging in the schematics to find out what exactly was going on!
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