Service manuals, schematics, eproms for electrical technicians

MAGNAVOX 17-20W CONSOL-STEREO-AMP SCH.

AUDIO - SERVICE MANUAL
Type: (DJVU)
Size
35.1 KB
Page
1
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    MAGNAVOX SCH. 1720W 1720 17 20W CONSOL STEREO AMP 17-20W
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  • See related repair forum topics below. May be help you to repair.
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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.

AIWA A22 végerősítő IC helyettesítése
Sziasztok Urak! Hozzám került egy ilyen erősítő.A HA1370-es IC rendesen kipukkadt és nem találtam boltot ahonnan lehetne rendelni. Esetleg valaki tudna segíteni,hogy lehet-e helyettesíteni és ha igen mivel. Köszönöm Üdv
Philips MCM726/12 Hi-FI nem indul. Hogyan tovább?
Sziasztok! Egy kis segítséget szeretnék kérni tőletek! Ünnepek alatt akad egy kis idő foglalkozni fent említett eszközzel. Probléma: Semmilyen életjelet nem ad magáról, nem világít egy LED sem. Gombokra nem reagál. Szétszedtem csatoltam képet, méregettem. 12V transzformátor működik, biztosítékok jók, egyenirányítás jó, átkerül a +/-12V a végfokozati panelre. Innentől kezdve nem tudom hogyan tovább. Látok egy "pufferkondit"?! fel van púposodva.. gondolom túlfeszültség miatt. Segítséget, javítási tippet előre is köszönöm! Csatoltam képet a Hi-Fi-ről! Mindenképp meg szeretném javítani. üdv: Csady
JVC rádiómagnó-CD, típ:RC-EZ55(megoldva)
Jó ebédet az étvágyhoz: Keresem ennek a készüléknek a rajzát, eddig csak fizetőst találtam. Holnap hozzák, CD el sem indul. Bálint
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