Service manuals, schematics, eproms for electrical technicians

PHILCO RADIO 39-70 39-75 39-80 SCH.

AUDIO - SERVICE MANUAL
Type: (DJVU)
Size
96.8 KB
Page
2
Category
AUDIO
SERVICE MANUAL
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    PHILCO RADIO 3970 3975 3980 SCH. 39 70 75 80 39-70 39-75 39-80
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Relevant AUDIO forum topics:
PIONEER VSX 915 AV ERŐSÍTŐ - néha magától átvált TUNER bemenetre....
Sziasztok, a PIONEER VSX 915 erősítőm időnként működés közben ( AUX, v. más bemenetről) átvált TUNER bemenetre
Van hogy hetekin nem produkálja a hibát, majd véletlenszerúen, menet közben átvált és ott is marad a bemenetválaszója.

Egyébként problémamentes - csak ezt lenne jó kideríteni mi okozhatja...

Köszönettel
Videoton RT7300s Stereo kijelzés nincs! (MEGOLDVA!)
Sziasztok!

A fent említett tuneren minden rendben működik, de 5-ös térerőnél sem indítja a STEREO led-et.
A led jó, mono kapcsoló rendben. Mérve a led egyik lábán testhez képest 15V megvan. Másik lábát kimértem, 820 ohmos ellenálláson keresztül a dekóderben található ic 9-es lábához a kontakt megvan. Mégsem jön be a stereo kijelzés.... valakinek van valami ötlete?
Mi a különbség az LC7821 éa Lc 78211 között?
Sziasztok! Egy erősítőben meghalt az LC78211 nevű input selector IC. Betehető-e helyette az LC 7821 nevű, ami látszólag (lábkiosztás, táp alapján) hasonló? Köszönettel Attila
Incorrect schematic in db : Polk PSW10 subwoofer

Hi,
I registered mostly to flag this issue :

- current database has this file
https://elektrotanya.com/polkaudio_psw10_sch.bmp/download.html

which is a completely unrelated schematic that is NOT for the PSW10.

- I uploaded a better schem :
https://elektrotanya.com/polk_psw10_schem.png/download.html

but currently it's (incorrectly) shown as a duplicate of another schem on this page:
https://elektrotanya.com/show_rawsch

Is it marked as a dup simply because the filesize matches ?
 

Best regards.

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