[TechAssist] Re: JVC - VCR - HR-S4700U - P.S. Problems
- From: "David Lessard" <mrfixit@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 13 Jun 2003 14:50:18 -0400
I may take you up on this offer. I'm assuming the power supply is completely
functional... I'll email you privately if I need this, thanks for the offer.
David Lessard
Alexandria Electronics
Ontario-Canada
mrfixit@xxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of agower
Sent: Friday, June 13, 2003 12:02 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: JVC - VCR - HR-S4700U - P.S. Problems
I have same model with bad heads will sell it for $15.00 including shipping.
Adolph B. Gower
Cordova TV & Electronics
10275 Old Placerville Rd. # 5
Sacramento, Ca. 95827
Ph. (916) 363-6565
Fx. (916) 3263-7623
agower@xxxxxxxxxxxxxxxxxx
Source For used parts and NLA Parts
NEC, MAGNAVOX , ZENITH
and many other brands
Fax (916)363-7623
Phone (916)363-6565
agower@xxxxxxxxxxxxxx
----- Original Message -----
From: "becyn" <becyn@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, June 13, 2003 7:59 AM
Subject: [TechAssist] Re: JVC - VCR - HR-S4700U - P.S. Problems
> Hello,
>
> some of those units used a small square smd for the display and control
> functions if you have this # m50938-638sp, suspect it. They used to be
> notorious for failures.
> ----- Original Message -----
> From: "David Lessard" <mrfixit@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, June 12, 2003 9:21 PM
> Subject: [TechAssist] Re: JVC - VCR - HR-S4700U - P.S. Problems
>
>
> > Load, drum, capstan, all work. As I said in my previous post, this VCR
> > functions (but with no display) when connector CN1 is disconnected from
> > power supply board. What I need is information on this connector, where
> does
> > it go? It looks like over to RF modulator, but I'm not sure. What ever
> this
> > connector is feeding is the problem. Could someone with a schematic
please
> > confirm this. Thanks in advance.
> >
> > David Lessard
> > Alexandria Electronics
> > Ontario-Canada
> > mrfixit@xxxxxxxxxxxx
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of becyn
> > Sent: Thursday, June 12, 2003 1:39 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: JVC - VCR - HR-S4700U - P.S. Problems
> >
> >
> > 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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