Service manuals, schematics, eproms for electrical technicians

HEROFON UNIVERSAL SUPER-470U 1943 SCH

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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  • Also known:
    HEROFON SUPER-470U SUPER470U 1943 SUPER 470 470U
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Marantz Model 5220 deck audio csatorna beállítása
Sziasztok! Hozzám került egy Marantz 5220 deck készülék javításra, amin semmi sem működik az audio részen. Hiába írnám le, hogy pl. már a fejhallgató kimenet sem egyforma, ez csak egy része a hibáknak. Tehát, mivel úgy tudom, a rajza nem nyilvános, ha tudna valaki segíteni magánban, azt megköszönném. Üdvözlettel: Attila
ELTA-8803 CLS
Sziasztok! ELTA 8803 CLS-házimozi kapcsolásirajzát keresem,esetleg olyan linket,ahol utána nézhetnék.Előre is nagyon köszönöm az esetleges segítséget:Yani.
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.

Unitra AS212D tuner áthangolása
Sziasztok!
Valaki hangolt már át CCIR sávra ilyet? Sajnos rajzot se találok...
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