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NSF H17A AC RECEIVER 1937 SM

AUDIO - SERVICE MANUAL
Type: (PDF)
Size
1.3 MB
Page
23
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    NSF H-17A AC RECEIVER H17A 1937 17
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
BRG szalagos magnóhoz motor (IMI)
Helló fiúk, kinek van nélkülözhető IMI motorja szalagos BRG magnóhoz? üdv Fand895
Turntable Victor/JVC TT-71
Given:

Victor TT-71, neon lamp does not light, speed is lower than normal.  This is subsequent some short circuit the owner does inside the device.  No further details.

I found out the VICTOR QL7 have the same motor driver amd I downloaded the service manual that I attached here in case this manual is not already uploaded.

Looking at the diagrams I found out that at TP3 (same with pin5 of IC803) instead if that rectangular signal, I have nothing but 5VDC and a negative or positive short spike whenever I'm starting or stopping the motor and 
Under the circumstances I suspect IC803 is defective.  The bad thing, IC803 is NPC SC8043.  Also I wonder if the crystal is fine (except that I wonder what can be wrong with a crystal after some short circuit).

Does anybody have any more suggestion?

Also, where can NPC SC4043 be sourced?  Also, a crystal 9.054MHz?

Thanks in advance,
Corneliu
Kenwood C-V750
Hi! Ez egy nagyon profi cucc, nálam van a hozzá való erősítő is. Egymás nélkül nem használható, lévén ez a kütyü vezérli a végfokot is. Az egységen csak a készenléti LED világít, semmire nem reagál, nem ad vezérlést az erősítőnek. A tulaj szerint alaphelyzetben az időt mutatja. Nos ez ezt sem. Ahogy lenni szokott, az előlapi panelon szvsz elszállt a proci, 5V ok, -30V ok és az egyéb tápok is. A STBY gomb jelét ez fogadja és dolgozná fel. De néma csend, a proci az egyetlen aktív elem, néhány ellenállás, kondi és csók. Még quarc sincs. Valakinek egy elfekvő darab, vagy rajz mert olvashatatlan a tipus...:/ ?
KENWOOD RXD 25L
Szevasztok,newezett HI-FI vel kűzdök,nincs kapcsolási rajzom,a végfok megy,de a TC 9213P toshiba Ic-nél megállt a tudomány.Nem találok róla adatlapot!Ha valaki tudna segíteni,kapcsolási rajzzal,vagy IC adatlappal,sokat segítene.Üdvözlettel:oivan
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