[TechAssist] Re: Sony SL-2500 Beta Dead, Part ID

  • From: "J Silverman" <greentron@xxxxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Wed, 9 Jan 2002 13:32:41 -0500

The power supply is complicated in that model and difficult to troubleshoot.
I would hope to find an electrolytic with high ESR. Some of them are
critical.
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: Tuesday, January 08, 2002 2:46 PM
Subject: [TechAssist] Re: Sony SL-2500 Beta Dead, Part ID


>
> 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
> > > > > > >
> > > > > > > Received today a Sony Beta VCR for repair. Not sure this is
> worth
> > > > > digging
> > > > > > into unless it may be something simple. Unit is totally dead. No
> > > display
> > > > > or
> > > > > > any action when the power button is pushed. Primary fuse, F1, is
> > fine.
> > > > No
> > > > > > schematic on this one and the unit is pretty compact so I hate
to
> > dig
> > > > into
> > > > > > it without some advance help. Any help would be appreciated.
> > > > > > >
> > > > > > > Bruce
> > > > > > > Bruce's TV Service
> > > > > > > Sierra Vista, Arizona
> > > > > > >
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