Service manuals, schematics, eproms for electrical technicians

RUSSIAN VESNA TRANSITORIZED AC-BATTERY TAPE RECORDER SCH

AUDIO - SERVICE MANUAL
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80.7 KB
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Category
AUDIO
SERVICE MANUAL
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    RUSSIAN VESNA ACBATTERY TAPE RECORDER AC BATTERY AC-BATTERY
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
MNC Hurricane V640 autós erősítő 39612 végfok tranzisztorok helyettesítése.Megoldva.
Üdvözlet mindenkinek. Egy MNC Hurricane V640 autós erősítővel küzdök.A végfok tranzisztorai B778 és D998, csont zárlatosak. B778 = KTB778 D998 = KTD998 Elvileg ezek lennének benne. Ilyeneket sehol sem találok.Kérem segítsen valaki azzal,hogy megírja a helyettesítő alkatrészek típusát,amit kapni is lehet itthon kis országunkban. Helytesitőként én ezeket néztem ki. Valaki erősitsen meg,nem -e tévedek. -D998 helyettesítő 2SC5198-al -B778 helyettesítő 2SA1941-el. Több topic is foglakozott ezzel a kérdéssel. http://www.elektronline.hu/wwwboard/thread.php?sorszam=524944&reply=9+v%E1lasz https://elektrotanya.com/?q=hu/content/magnat-car-amplifier-xcite-560 https://elektrotanya.com/?q=hu/content/figyelem-azonos-nevu-alkatreszek Válaszokat előre is köszönöm .
Siva pa300
Sziasztok! Volna egy kérésem: Kaptam egy Siva PA300-as végfokot. Sajnos mind a két oldalát kinyírták, és vannak rajta olyan ellenállások, amik szénné égtek. Rajzot keresek hozzá, vagy ha valakinek van ilyen erősítője, kérem fotózza le a panelt, hogy lehessen látni, milyen alkatrészek mentek tönkre az enyémben. Várom válaszaitokat! Üdvözlettel: saca200
Vermona MV3 sutyorog...
Sziasztok! Minap szereztem egy gyári MV3 hangfalat (bazinagy...reflex...12,5 Watt 6 Ohm) gyönyörű állapotban. Lelkesen bevittem a nappaliba, ma pedig felhoztam a pincéből az MV3 erősítőmet. Szól mint a vaddisznó, de számok közben "sutyorog"...Nem tudom jobban megfogalmazni, de olyan, mint amikor egy kontaktos potit tekergetnék. A potik jók, lekezeltem őket...a trimmert is... ha tekergetem őket, vagy ütögetem az egyéb alkatrészeket, semmi változás... Valami "rohad"... Van valakinek gyors ötlete, mielőtt nekiesek??? stonhy
Trio-Kenwood: KR-3010 [Radio] S.N.962845 / Does not work, the final floor and prefinal floor defect with many burned component/

I greet you! I would need the scheme of this "vintage" amplifier that needs to be "restored". The problem is that in the prefinal and final floor I have many "fried" resistors well, their value cannot be identified.I replaced the defective transistors: 2SC1509, 2SA777,2SB690 and 2SD 796 (each 2 pcs.) and the electrolytic capacitors adjacent to them. I could not go further because of the carbonized resistors that I do not know their value (I can only guess that they are values small, in the order of ohms). The schematic diagram I downloaded, from the address received by the kindness of a colleague is not complete - it is a single page (missing Q29-Q30-Q31-Q3 and resistors R115-R116-R117-R118 which are completely carbonized, at other resistors I could see their value).Thanks in advance!
Finally, I found the missing part

If stuck in the repair and you ask questions, please do it as follows: - Details: Give the exact model number of your device and the chassis ID (if there is). - If possible, please attach pictures of the appliance. - Anamnesis: Write down the exact symptom. If hard to describe the symptom, it is difficult to verbally defined clearly, attach pictures or sound of the phenomenon! - Tell what was you have done so far: search contact error, which parts has examined or changed yet, etc... The incorrectly named topic suspended and will be deleted after 48 hours! Suspended state while others are not able to comment until you correct the address. Subsequent repair of the defective title (within 48 hours) by clicking on the "Edit" tab can be carried out.

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