Service manuals, schematics, eproms for electrical technicians

HEATHKIT MR-1 5 CH MOBILE RECEIVER SCH

AUDIO - SERVICE MANUAL
Type: (GIF)
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250.6 KB
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Category
AUDIO
SERVICE MANUAL
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  • Also known:
    HEATHKIT MR-1 MOBILE RECEIVER MR1 CH MR
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  • See related repair forum topics below. May be help you to repair.
Warning!
If you are not familiar with electronics, do not attempt to repair!
You could suffer a fatal electrical shock! Instead, contact your nearest service center!

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Relevant AUDIO forum topics:
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.

XSA - 720 Autó erősítő
Üdv a címben említett erősítőhöz szeretnék kapni valami segítséget jólenne eggy rajz és valami info rólla köszönöm Üdv Putyika
UHER M534 mikrofon bekötése? Köszönöm, megoldódott!

Sziasztok!

Van nálam a fenti Uher M 534-es mikrofon. Szétszedve a mikrofon része OK, de ott van még egy kis trafó szerűség, aminek csak két lábát látok, és előttem már forrasztgatták. Jelenleg az erősítőbe dugva csak búg.

A kérdésem: A mikrofonról jön a három vezeték: kettő a mikrofon, egy a test. A kábelen is van három vezeték, két "meleg" ér és a test. A test egyértelmű, de azt a vasmagos tekercset hogyan kell közé kötni? Ha a mikrofont közvetlenül a kimenetre kötöm, akkor kell külső illesztő trafó is. Gondolom, hogy azzal lehetne megoldani az illesztést, nagyobb impedanciára, külső trafó helyett.

Köszönöm: formasu

Milyen az a hangszóró aminek 4 kivezetése van.
Szevasztok Került hozzám egy hangszóró aminek 4 kivezetése van,illetve 2 különálló 6 omos tekercse,ugy nézem hogy mély nyomó,de ilyennel még nemtalálkoztam,mire szolgál a négy kivezetés?
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