[TechAssist] Re: Sony VCR, SLV555 won't power up, no display [UPDATE]
- From: "Tel-Tek" <teltek3@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 27 Mar 2004 08:44:12 -0500
After 2 months..eh? Well I do declare.;-)
-Ed-
Tel-Tek Electronics
Ontario-Canada
teltek3@xxxxxxxxxxxx
----- Original Message -----
From: "Gary McCartney" <gary@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, March 27, 2004 1:58 AM
Subject: [TechAssist] Re: Sony VCR, SLV555 won't power up, no display
[UPDATE]
> The original messages from this thread was in January. It has taken 2
> months but a very generous person has given me a scrap SLV555UC VCR
> which I was able to use the front panel display board (including the
> micro) to install into the machine I was working on.
> This corrected the fault, so I am declaring that the micro was indeed
> the problem.
>
>
>
>
>
> Gary McCartney
>
> McCartney Electronics
> Guelph Ontario Canada
> Est. 1984
> email: gary (at) number63.ca
>
>
>
>
>
>
>
>
> Previous thread:
>
>
>
> Kevin, thanks to your zip file, I can now say the power supply is
> functioning properly. There is no 5V signal reaching the power supply to
> turn on the regulators. I inserted my own external 5V supply and the
> regulators turned on and all the output voltages are present. The front
> panel LED's and digital display lights up but there is no VCR action at
> all. I suspect the micro, which is located on the front panel display
> board.
>
> Does anyone have a junker machine with a usable front panel circuit
> board (the board with the digital display on it)? The display doesn't
> have to be good or even there because I can use the display I have here.
> Number on this board is: 1-631-340-13. Please email me privately with
> price.
>
> Thank you.
>
>
>
>
>
>
>
>
>
>
>
>
> Kevin Gunn wrote:
> >
> > Gary I sent you the ZIP file. Hope it helps.
> >
> > Kevin Gunn
> > Star Tek Electronic Services
> > 390 Springbank Drive
> > London, Ontario
> > www.ulurn.com/startek
> >
> > N6J 1G9 519-473-6366
> > ----- Original Message -----
> > From: "Gary McCartney" <gary@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, January 13, 2004 4:39 PM
> > Subject: [TechAssist] Sony VCR, SLV555 won't power up, no display
> >
> > > I have this Sony VCR, model SLV555 which will not power up and the
front
> > > panel display is not lit either.
> > >
> > > I found a 1500uF, 25V cap in the power supply that was leaky. Replaced
> > > that and a few others with high ESR. Also checked the diodes and made
> > > sure that D207 has 16V on the cathode. The ON/OFF pin 2 on the 3
voltage
> > > regulators (3120C, 3120C and 3050C) are at 0.8V all the time, even
when
> > > I push the power button.
> > >
> > > Does anyone have a list of the proper voltages on the power supply
> > > connector pins and the source from which the regulator ON/OFF pin gets
a
> > > HI signal for power?
> > >
> > > Power supply is model APS-01UC, Sony part number 1-413-468-13
> > >
> > >
> > > Thanks for any help.
> > > --
> > >
> > >
> > >
> > >
> > > Gary McCartney
> > >
> > > McCartney Electronics
> > > Guelph Ontario Canada
> > > Est. 1984
> > > email: gary (at) number63.ca
> > >
> >
> --------------------------------------------------------------------------
> > ---
>
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