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GELOSO 2643 RF UNIT SCH

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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    GELOSO UNIT 2643 RF
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Relevant AUDIO forum topics:
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
Sony GTK-XB7 Aktív hangfal ( nincs készenlét )
Üdv Mesterek.!

Sony GTK-XB7 Erősítővel bajlódok.
Elmondás szerint csak megállt.
Hála a rajz a Tanyán megvolt.
A készenléti 5V nincs.
A rajz részletről van szó.
A bemenet 36V megvan , kimeneten 1.6V van , úgy hogy az áramkör le van választva a 2 2A kimeneti biztosítónál.
Minden elem átnézve , jó ,Így csak az IC LEHET HIBÁS.
Zárlatos volt a D1 3D dióda, természetesen előtte semmi nem volt.
De hogy lehet hogy a bemeneti 2A biztosíték nem ment ki ?
Ic.t (EUP3490 ) , nem találtam , legalább is aminek a lábkiosztása megegyezne.
HQ  /LM2596S) 40V/3A , de más a lábkiosztás.
SMD IC , tehát nincs mód forgatásra.
Ha tudna valaki segíteni , megköszönném.
TME-nél elvileg van , de nincs kép róla.
Köszönettel: Öreg Tom
JBL SB250 subwofer panelon sérült IC azonosítása
Sziasztok!
Fenti panelon az L102 mellett és a D101 fölött megégett 8 lábú smd eszköz van.Dc konverternek gondolom.Ami olvasható rakta 5.31.  5 AM.   7K.
Tud valaki segíteni? Üdvözlettel Reparator1
Feleslegessé vált alkatrész
Tanyalakók ! Van két vadonatúj, 10000uF, 100V, 105C, SIEMENS kondenzátorom. Ha valakit érdekel. Üdv. gergosz01
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