Service manuals, schematics, eproms for electrical technicians

MAGNAVOX 278 SCH.

AUDIO - SERVICE MANUAL
Type: (DJVU)
Size
11.3 KB
Page
1
Category
AUDIO
SERVICE MANUAL
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    MAGNAVOX 278 SCH.
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
I NEED YOUR HELP
Hello!
I need your  help ...
I need this technicaL MANUAL  .... MONACOR  STAGE LINE (PAK-115/SW)
Thank you.
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.

Shiva PPA-1200 végfok végtranzisztor helyettesítés
Sziasztok! Adott egy Shiva PPA-1200 végfok. Az egyik oldal nem szól, találtam benne 5db zárlatos végtranyót. 2SA1302 és 2SC3281 tranyók vannak benne. Valahol olvastam, hogy ezeket a tranzisztorokat már nem gyártják, amiket kapni lehet az pedig mind hamisítvány. 2SC5200 és és 2SA1943 lenne a helyettesítője, de ebből is rengeteg a hamis. MJL21193, 21194-et ajánlották helyettesítőnek. Igaz ezek drágább alkatrészek, de állítólag ebből esélyesebb, hogy eredetit kapok. A kérdésem az lenne, hogy mivel 5db ment tönkre (2 komplementer pár+1db) elég ha ezt a 3 párat cserélem ki, vagy muszáj kicserélnem mind a 8 párat? Ha nem muszáj nem cserélném ki mindet, mert anyagilag elég húzós lenne.
Thomson A3600
Helló Mindekinek! Tudna nekem valaki segíteni? Thomson A3600 hifi, magnó egysége nem üzemel. Lejátszásra a mechanikák mozognak(kattognak), egy idő után abba hagyja. Nem tudom egyik funkciót sem elindítani. Bármilyen apró segítség jól jönne. Előre is köszöm.
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