[TechAssist] Re: Repair Tip for JVC Stereo Receiver model RX-517VTN
- From: "Ed Gaidies" <teltek3@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 19 Jan 2003 17:50:49 -0500
Now see....I did not know that. Good stuff Gary. Helpful to know.
-Ed-
Tel-Tek Electronics
Ontario-Canada
"If Apple and Microsoft can talk...why can't the rest of the World?"
teltek2@xxxxxxxxxxxx
----- Original Message -----
From: "Gary McCartney" <gary@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, January 19, 2003 4:48 PM
Subject: [TechAssist] Repair Tip for JVC Stereo Receiver model RX-517VTN
>
> This may be common knowlege amongst techs who see a lot of these amps
> but thought I'd mention it for those like me who didn't know about it.
>
> After replacing the output amp transistors for one channel, this JVC
> Stereo Receiver model RX-517VTN still had no audio output, although the
> output transistors had +49V and -49V on their respective collectors.
> After spending time checking diodes and transistors around the whole
> chassis, as well as soldering a number of connections, I decided to go
> online and check for tips. One of the data bases I subscribed to had a
> listing for a different JVC model, stating that there is a ground plane
> on the center of the board that normally makes contact with the chassis
> case when the bottom plate is screwed on and if the bottom plate is not
> screwed on, there will be no output. Sure enough, I took a jumper wire
> from this ground plane and jumped it to the case and the amplifer was
> now working fine.
> --
>
>
>
>
> Gary McCartney
>
> McCartney Electronics
> 7134 Fife Rd, RR 7
> Guelph Ontario Canada N1H 6J4
> Fax: (519)821-1530
> email: gary (at) number63.ca
>
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