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

From: "Lawrence Tucker II" <kc4iai@xxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx
Date: Thu, 10 Jan 2002 17:51:06 +0000
///  Does your relay have an enclosed diode? Even if no current flows you 
should read 12 volts on both sides of the relay if the coil is not open.


>From: "Bruce Youmans" <youmans@xxxxxxxx>
>Reply-To: techassist@xxxxxxxxxxxxx
>To: <techassist@xxxxxxxxxxxxx>
>Subject: [TechAssist] Re: Sony SL-2500 Beta Dead, Part ID
>Date: Thu, 10 Jan 2002 05:48:06 -0700
>
>
>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
> > > > > > > > >
> > > > > > > > > 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
> > > > > > > > >
> > > > > > > > >
> > > ------------------------------------------
> > > > > > > > > Help make your TechAssist database
> > > better!
> > > > > > > > > Submit your fixes here:
> > > > http://circuitwork.com/techassist/tip/#tips
> > > > > > > > >
> > > ------------------------------------------
> > > > > > > > > To UNSUBSCRIBE your email address, click
> > > here:
> > > > > > > > >
> > >
> > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
> > > > > > > > > Or send a BLANK email with unsubscribe
> > > in the
> > > > > > > > > SUBJECT field to the address above.
> > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > > > ------------------------------------------
> > > > > > > > Help make your TechAssist database better!
> > > > > > > > Submit your fixes here:
> > > http://circuitwork.com/techassist/tip/#tips
> > > > > > > > ------------------------------------------
> > > > > > > > To UNSUBSCRIBE your email address, click
> > > here:
> > > > > > > >
> > >
> > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
> > > > > > > > Or send a BLANK email with unsubscribe in
> > > the
> > >
> > === message truncated ===
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Send FREE video emails in Yahoo! Mail!
> > http://promo.yahoo.com/videomail/
> > ------------------------------------------
> > Help make your TechAssist database better!
> > Submit your fixes here: http://circuitwork.com/techassist/tip/#tips
> > ------------------------------------------
> > To UNSUBSCRIBE your email address, click here:
> > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
> > Or send a BLANK email with unsubscribe in the
> > SUBJECT field to the address above.
> >
> >
>
>------------------------------------------
>Help make your TechAssist database better!
>Submit your fixes here: http://circuitwork.com/techassist/tip/#tips
>------------------------------------------
>To UNSUBSCRIBE your email address, click here:
>mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
>Or send a BLANK email with unsubscribe in the
>SUBJECT field to the address above.
>


_________________________________________________________________
Send and receive Hotmail on your mobile device: http://mobile.msn.com

------------------------------------------
Help make your TechAssist database better!  
Submit your fixes here: http://circuitwork.com/techassist/tip/#tips
------------------------------------------
To UNSUBSCRIBE your email address, click here:
mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
Or send a BLANK email with unsubscribe in the
SUBJECT field to the address above.
Follow-Ups:
- [TechAssist] Re: Sony SL-2500 Beta Dead, Part ID
  - From: Bruce Youmans
[TechAssist] Re: Sony SL-2500 Beta Dead, Part ID

Other related posts:
