[TechAssist] Re: Sony SL-2500 Beta Dead, NO FIX
- From: "Bruce Youmans" <youmans@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 22 Jan 2002 08:37:42 -0700
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
> > > > > > > 8 759 170 08.
> > > > > > > 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: Sunday, January 06, 2002 10:57 PM
> > > > > > > Subject: [TechAssist] Re: Sony SL-2500
> > Beta
> > > > Dead, Part ID
> > > > > > >
> > > > > > >
> > > > > > > >
> > > > > > > > Need to know the part number for IC3 on
> > the
> > > > power supply board.
> > > > > > > > This unit is a Sony Sl-2500, but is
> > similar
> > > > to a Zenith VR-9775.
> > > > > > > >
> > > > > > > > Thanks.
> > > > > > > >
> > > > > > > > Bruce
> > > > > > > > Bruce's TV Service
> > > > > > > > Sierra Vista, Arizona
> > > > > > > >
> > > > > > > > ----- Original Message -----
> > > > > > > > From: Bruce Youmans <youmans@xxxxxxxx>
> > > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > > Sent: Friday, January 04, 2002 9:36 AM
> > > > > > > > Subject: [TechAssist] Re: Sony SL-2500
> > Beta
> > > > Dead
> > > > > > > >
> > > > > > > >
> > > > > > > > >
> > > > > > > > > Just learned this Sony Beta is similar
> > to
> > > > a Zenith VR9775 in case
> > > > > > anyone
> > > > > > > > has
> > > > > > > > > information on either.
> > > > > > > > >
> > > > > > > > > Thanks
> > > > > > > > >
> > > > > > > > > Bruce
> > > > > > > > > Bruce's TV Service
> > > > > > > > > Sierra Vista, Arizona
> > > > > > > > >
> > > > > > > > > ----- Original Message -----
> > > > > > > > > From: Bruce Youmans <youmans@xxxxxxxx>
> > > > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > > > Sent: Wednesday, January 02, 2002
> > 10:18 PM
> > > > > > > > > Subject: [TechAssist] Sony SL-2500
> > Beta
> > > > Dead
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > > Manufacturer: Sony
> > > > > > > > > > Model: SL-2500 Beta VCR
> > > > > > > > > > Symptom: Dead
> >
> === message truncated ===
>
>
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