[TechAssist] Re: Sony SL-2500 Beta Dead, NO FIX
- From: Don-WRF Electronics <wrf_88@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 22 Jan 2002 15:57:33 -0800 (PST)
Thanks Bruce too bad as there never will be a vcr
again like the SL2500 it can go forward and reverse
one frame at a time I keep mine as a mementeo to the
great electronics that has been and will never be
again
I kept my manuel close by hopeing you would need
something.
O well sometime perhaps---Don
--- Bruce Youmans <youmans@xxxxxxxx> wrote:
>
> Customer choose not to have this unit fixed. Thanks
> everyone for your tips
> and Don for you offer to help off line. I also
> recently learned that the
> problem may have been a DC-to-DC converter on the
> clock module. There is a
> two wire test cable coming out of this module. The
> test cable should have 12
> Volts on it and it did not. This DC-to-DC converter
> supplies the voltage for
> the clock display while in the off state, as well as
> a standby voltage that
> supplies the power supply module. I hope this
> information helps someone else
> in the future that may have a unit with the same
> problem.
>
> Bruce
> Bruce's TV Service
> Sierra Vista, Arizona
>
> ----- Original Message -----
> From: Don-WRF Electronics <wrf_88@xxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, January 10, 2002 4:44 PM
> Subject: [TechAssist] Re: Sony SL-2500 Beta Dead,
> Part ID
>
>
> >
> > Hi Bruce I don't believe the fault is a power
> supply
> > fault as it has to be standby not switched I have
> 2 of
> > these working but its hard to remember all the
> faults
> > I have seen.They are a supper VCR can go forward
> and
> > backwards one frame at a time.
> > Anyway contact me direct so as not to cause undue
> mail
> > on the list I can scan data to you.--Don
> > List ==wrf_88@xxxxxxxxx Home==wrf@xxxxxxxxxxxx
> >
> >
> > --- Bruce Youmans <youmans@xxxxxxxx> wrote:
> > >
> > > Don,
> > >
> > > I have traced the 12 volt input of IC3 back to
> the
> > > relay. The relay is not
> > > being activated. Has 12 volts on relay coil. I
> have
> > > checked the transistor
> > > that grounds the other side of the relay coil
> and it
> > > is fine. Relay is fine.
> > > I have tried manually shorting the relay
> contacts.
> > > 12 volts come up, but
> > > still no clock and no function operation.
> > >
> > > Bruce
> > > ----- Original Message -----
> > > From: Don-WRF Electronics <wrf_88@xxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Thursday, January 10, 2002 3:22 AM
> > > Subject: [TechAssist] Re: Sony SL-2500 Beta
> Dead,
> > > Part ID
> > >
> > >
> > > >
> > > > Bruce the 12v comes from RL1 and is switched.
> > > > Don-- ps I never had any faults with that
> power
> > > > suppy
> > > > either.
> > > >
> > > > --- Bruce Youmans <youmans@xxxxxxxx> wrote:
> > > > >
> > > > > Jerry,
> > > > >
> > > > > There is no 12 volts on the input. Because
> I'm
> > > > > working without a schematic
> > > > > I'm not sure there is 12 volts on the input
> when
> > > the
> > > > > VCR is in the standby
> > > > > (off) mode. Yes, it is possible an
> electrolytic
> > > > > capacitor or two may be bad
> > > > > because of the age.. I have checked most of
> them
> > > and
> > > > > so far the ESR is good.
> > > > > I was also thinking that there may be a ICP
> or
> > > low
> > > > > value resistor that has
> > > > > opened. This is because everything is
> > > inoperative,
> > > > > even the clock in the off
> > > > > mode. The customer said the VCR was plugged
> in
> > > and
> > > > > one day when they went to
> > > > > use it everything was dead. I have checked
> all
> > > three
> > > > > of the fuses and they
> > > > > are OK. There are some voltages on the power
> > > supply
> > > > > board in various
> > > > > locations. Not sure if they are correct. Any
> > > other
> > > > > thoughts you might have
> > > > > are appreciated.
> > > > >
> > > > > Bruce
> > > > > ----- Original Message -----
> > > > > From: J Silverman
> <greentron@xxxxxxxxxxxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Tuesday, January 08, 2002 10:45 AM
> > > > > Subject: [TechAssist] Re: Sony SL-2500 Beta
> > > Dead,
> > > > > Part ID
> > > > >
> > > > >
> > > > > >
> > > > > > If that IC has 12 volts input, it should
> have
> > > 9
> > > > > volts output. If there is
> > > > > no
> > > > > > 12 volts the problem is elsewhere. I dont
> > > recall
> > > > > ever having a power
> > > > > problem
> > > > > > with that model. Considering the age, I
> would
> > > > > think some of the
> > > > > electrolytic
> > > > > > capacitors may be dried out.
> > > > > > Jerry Silverman
> > > > > > Greentron Inc
> > > > > > 4 Newland Ave
> > > > > > Greenville SC 29609
> > > > > > 864 232 3889
> > > > > > Fax 271 2080
> > > > > > mailto:greentron@xxxxxxx
> > > > > > ----- Original Message -----
> > > > > > From: "Bruce Youmans" <youmans@xxxxxxxx>
> > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Monday, January 07, 2002 12:50 PM
> > > > > > Subject: [TechAssist] Re: Sony SL-2500
> Beta
> > > Dead,
> > > > > Part ID
> > > > > >
> > > > > >
> > > > > > >
> > > > > > > Thanks Jerry.
> > > > > > >
> > > > > > > I have been trying to repair this VCR
> > > without a
> > > > > schematic. The part had
> > > > > no
> > > > > > > information on it. I was hoping that
> this
> > > part
> > > > > would be the reason the
> > > > > VCR
> > > > > > > is dead, has no display, and no function
> > > > > operation at all.
> > > > > > >
> > > > > > > Bruce
> > > > > > > Bruce's TV Service
> > > > > > > Sierra Vista, Arizona
> > > > > > >
> > > > > > > ----- Original Message -----
> > > > > > > From: J Silverman
> > > <greentron@xxxxxxxxxxxxxxxx>
> > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > Sent: Monday, January 07, 2002 9:58 AM
> > > > > > > Subject: [TechAssist] Re: Sony SL-2500
> Beta
> > > > > Dead, Part ID
> > > > > > >
> > > > > > >
> > > > > > > >
> > > > > > > > That is a 78M08, standard 8 volt, 1/2
> amp
> > > 3
> > > > > terminal voltage
> > > > > regulator.
> > > > > > > Sony
>
=== message truncated ===
=====
WRF Electronics [Don Montgomery]
RR#1
Enterprise Ont. K0K1Z0
Canada
Ph-613-358-2927 Fax-613-358-2090
Email wrf_88@xxxxxxxxx
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