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JVC L-A10 SM

AUDIO - SERVICE MANUAL
Type: (PDF)
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580.1 KB
Page
13
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    JVC LA-10 LA10 LA 10 A10 L-A10
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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
Jvc rv-nb52 boomboxban milyen laser lenne a CD-hez gyárilag?
Sziasztok!

Adott egy JVC RV-NB52 bömbölde. Nincs benne a laser a CD-ben. Valaki járt benne. 

Nem tudja valaki, mi való bele gyárilag?

Köszi!
JVC KD-R472 autórádió halkan szól
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Tapasztalt már hasonlót valaki?

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