Service manuals, schematics, eproms for electrical technicians

VEF-12 OROSZ RADIO SCH.

AUDIO - SERVICE MANUAL
Type: (DJVU)
Size
38.3 KB
Page
1
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    VEF-12 RADIO SCH. VEF12 OROSZ VEF 12
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Orosz keverő_Mema_MC120_táp
Sziasztok, egy orosz keverő tápjában van két stab. TO220 tokban, ezek adait szeretném megtudni. KPEH 8 B, a másik 2E15 b. Az elsőről találtam adatot KP142EH 8 B, alatt amit +12V-osnak ir. Köszönettel. : Imre
Roadstar CD-770BT, Autórádió, végfok IC?
Üdv Tisztelt Fórumlakók ! A címben szereplő CD-s autórádió végfok IC maradéka látható a fotón, de a lényeg nincs meg (valaki már kirázta belőle a darabkát..). Nem találtam sehol semmi infót, hogy milyen IC kell bele. Ha tudna vki segíteni, hálás lennék ! Köszi! Gondif
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.

300W-os erősítő 20KHz-re (lezárva)
Üdv Szükségem lenne egy 300W-os erősítőre aminek 18KHZ-22KHz tartományban kellene működnie. Tud valaki ilyet hol lehet kapni, esetleg kapcsolási rajz az építéséhez? Balázs
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