Service manuals, schematics, eproms for electrical technicians

B-O GRAND PRIX-505K 1949 SCH

AUDIO - SERVICE MANUAL
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SERVICE MANUAL
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  • Also known:
    BO GRAND PRIX-505K PRIX505K 1949 PRIX 505 505K B-O
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Készülék beazonosítása
Sziasztok! Tudnátok segíteni milyen gyártmányú a készülék és hogy keressek hozzá rajzot?
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.

Roadstar clr 2618 asztali rádió kijelző probléma
Tisztelt Szakik, A fent említett rádió javításában kérném segítségeteket. A probléma, hogy a kijelző nagyon halovány. egyébként funkcionálisan rendben működik. Van benne két led háttérvilágításnak azok is működnek. Örülnék ha valaki egy rajzal ki tudna segíteni illetve a tanácsokat megköszönném. Amire iddig jutottam a táp átnézve, kondik cserélve, tranziszotrok is. Egyen fesz tiszta. Csatolok egy képet. Csak azért hogy könnyeb legyen beazonosítani. ( A csatolt kép nem a beteg példány.) Segítségeteket előre is köszönöm. Üdv.: Gy
Targa DVH 5100x Házi mozi STA 505 IC végfok hiba
Sziasztok! Targa DVH 5100x Házimozi erősítő végfokba meghalt 1db STA505 IC. Ha valakinek lenne STA 505 IC-je vagy komplett panelja ahol 4db STA ic van érdekel. Üdv Csaba
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