[TechAssist] Re: JVC - VCR - HR-S4700U - P.S. Problems
- From: "becyn" <becyn@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 12 Jun 2003 13:38:37 -0400
I highly suspect that a motor drive IC has gone south. Check load, drum,
capstan, in that order.
Jim McVey
McVey Alltronix
327 Broadway
Newburgh Ny 12550
ph: 845 561 8383
fx: 845 561 9017
Consumer electronics &
computer service.
Factory authorized for
over twenty brands.
----- Original Message -----
From: "David Lessard" <mrfixit@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, June 12, 2003 1:53 PM
Subject: [TechAssist] Re: JVC - VCR - HR-S4700U - P.S. Problems
> No C33 in this SMPS. I changed C16 and C19, same results. You can hear the
> SMPS chirp a couple of times, then it shuts down. What I really need here
is
> reference to connector CN1 on the SMPS. Which circuitry does it feed? This
> is where the loading problem is. When CN1 is disconnected the VCR works
but
> without a display. Round two...
>
> David Lessard
> Alexanria Electronics
> Ontario-Canada
> mrfixit@xxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of J Silverman
> Sent: Thursday, June 12, 2003 11:30 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: JVC - VCR - HR-S4700U - P.S. Problems
>
>
> Is there a C33 in the power supply on that model?
> Jerry Silverman
> Greentron Inc
> 4 Newland Ave
> Greenville SC 29609
> 864 232 3889
> Fax 271 2080
> mailto:greentron@xxxxxxx
> ----- Original Message -----
> From: "David Lessard" <mrfixit@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, June 11, 2003 6:02 PM
> Subject: [TechAssist] JVC - VCR - HR-S4700U - P.S. Problems
>
>
> > VCR came in dead, found information referring to C16 & C19, they both
> > checked good and weren't replaced. I can get the VCR to come alive
(load,
> > play, ff, rr, etc.) but with no display when connector CN1 on the SMPS
> board
> > is disconnected. My question is, what circuit does CN1 supply? I didn't
> have
> > the time to check if the CABLE in via the RF modulator was working. The
> > above results were via RCA A/V jack to a monitor. A partial scan of the
> > circuit supplied by CN1 would be very helpful. Thanks techs.
> >
> > David Lessard
> > Alexandria Electronics
> > Ontario-Canada
> > mrfixit@xxxxxxxxxxx
> >
> >
>
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