[TechAssist] Re: Sony KV27HSR10 1989 model, loss of sound

  • From: kevinstv <kevinstv@xxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Fri, 11 Oct 2002 15:32:49 -0700

Peter,

How do the SM caps measure for ESR on this board?  I'll bet you they have
gone bad just like in the SBX-1637 sound module.

Kevin Wilks
Kevin's TV and Video Repair
Penticton BC Canada
kevinstv@xxxxxxx
----- Original Message -----
From: "peter kowalik" <pe.kow@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, October 10, 2002 10:15 PM
Subject: [TechAssist] Re: Sony KV27HSR10 1989 model, loss of sound


>
> Hello all
> There was a reply from Jeff the man with the Intrepid nature that
mentioned
> a repair from the Tech CD regarding the SRS module and garbled sound.
We're
> working on a 27XBR10 with distorted and garbled sound and have narrowed
the
> fault down to the  SBX-1593-01  SRS module. It seems that it is no longer
> available here and we were wondering if anyone might have stock?  Customer
> would like the set as the pix is very good but he is not quite ready to
> initiate a second home theatre in his house (it's an option- get an all in
> one DVD-home theatre stereo and consider the TV as a monitor) Hoping for
> good news in the near future. Peter Kowalik    pe.kow@xxxxxxxxxxxx
Keith's
> Stereo, Burlington ,Ont.
>
> ----- Original Message -----
> From: "jorge miret" <jorge_miret@xxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, October 10, 2002 8:46 AM
> Subject: [TechAssist] Re: Sony KV27HSR10 1989 model, loss of sound
>
>
> >
> > Hello:
> > I dont know if your model is similar to KV-27TR10 but
> > I had a similar problem and in my case was R253
> > (27K-1/4W) open and it goes to pin# 1 of IC 201
> > (SI-4102).
> > Give it a try.
> > HTH,
> > Jorge.
> > --- Damon <DAMON101@xxxxxxxxxxxxxx> wrote:
> > >
> > > Update, special note about Audio monitor out AND
> > > Variable audio output.
> > >
> > > I found that the AUDIO MONITOR OUTPUT comes from IC
> > > 251 the stereo
> > > demodulator IC, If that works you know the TV works
> > > up to the stereo
> > > demodulator,  THE VARIABLE AUDIO OUTPUT LINE FEEDS
> > > THE AUDIO AMPS, if those
> > > jacks don't work, IC 251 is bad.
> > >
> > >
> > > Then check.......well darn, looks like I left my
> > > notes on the boss's table,
> > > gotta order that part. Anyways audio input on the
> > > AUDIO AMPS is PIN 1, MUTE
> > > circuit is on PINS 2 and 4 (+
> > > voltage mutes it) and is provided by a parallel
> > > muting source ( the mute
> > > button on the remote and the speaker button on the
> > > back)
> > >
> > > Damon Brunger
> > > damon101@xxxxxxxxxxxxxx
> > > Telrad Electronic Services
> > > Ft Wayne, IN 46815
> > >
> > > ----- Original Message -----
> > > From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Wednesday, October 09, 2002 7:51 AM
> > > Subject: [TechAssist] Re: Sony KV27HSR10 1989 model,
> > > loss of sound
> > >
> > >
> > > >
> > > > Yes it does, the plug at the back of the K board
> > > will have 19 v for the
> > > > audio outputs, the plug in closest to the rear of
> > > the chassis under neath
> > > > will have 3-4 pins nearest the rear with a lesser
> > > voltage. I can hear the
> > > > outputs actually hiss so I know the outputs are
> > > ok, previous repairs to
> > > this
> > > > model seemed to always end up on the a/v switching
> > > circuit located at the
> > > > back board where the RCA input jacks are located.
> > > Can't tell you which
> > > IC's
> > > > on the U-Board to test or order, but you can
> > > isolate the problem to the
> > > > switches if you get audio out of the Monitor out
> > > or the Variable output
> > > > jacks, AND you hear hissing from the Audio Amps,
> > > also you may try using
> > > the
> > > > Inputs to see if that route produces results,
> > > either way try to bring your
> > > > schematics and scope with you.....Oh wait a
> > > minute, you have a 27", you
> > > > might be able to lift that into your truck. I have
> > > old folks and a 32" TV
> > > > with wings, easier for me to quick scope the unit
> > > in the customer's home.
> > > > Damon Brunger
> > > > damon101@xxxxxxxxxxxxxx
> > > > Telrad Electronic Services
> > > > Ft Wayne, IN 46815
> > > >
> > > > ----- Original Message -----
> > > > From: "kevinstv" <kevinstv@xxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Tuesday, October 08, 2002 10:28 PM
> > > > Subject: [TechAssist] Re: Sony KV27HSR10 1989
> > > model, loss of sound
> > > >
> > > >
> > > > >
> > > > >
> > > > > Damon,
> > > > >
> > > > > Does it have the stand-alone p/s that is
> > > upright?
> > > > >
> > > > > Kevin Wilks
> > > > > Kevin's TV and Video Repair
> > > > > Penticton BC Canada
> > > > > kevinstv@xxxxxxx
> > > > > ----- Original Message -----
> > > > > From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Tuesday, October 08, 2002 7:33 PM
> > > > > Subject: [TechAssist] Re: Sony KV27HSR10 1989
> > > model, loss of sound
> > > > >
> > > > >
> > > > > >
> > > > > > Just working on one of these units, except
> > > it's a 32". Yes, it is
> > > > similar
> > > > > to
> > > > > > the KV27xbr 15. No, the unit does not use the
> > > sbx1637 module. Suspect
> > > > the
> > > > > > A/V switches on the U-Board, I'm presently
> > > working to isolate this,
> > > need
> > > > a
> > > > > > schematic to get thru the audio switch
> > > circuitry.
> > > > > >
> > > > > > Damon Brunger
> > > > > > damon101@xxxxxxxxxxxxxx
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "Peter oliver"
> > > <oliver_peter1@xxxxxxxxxxx>
> > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Tuesday, October 08, 2002 9:05 PM
> > > > > > Subject: [TechAssist] Re: Sony KV27HSR10 1989
> > > model, loss of sound
> > > > > >
> > > > > >
> > > > > > >
> > > > > > > Too early for that module this set simmilar
> > > to XBR common faults are
> > > > the
> > > > > > > regulators along the center heatsink develop
> > > bad connections, also
> > > > > > > Pincushion problems from bad coil. the
> > > regulator connections cause a
> > > > > mirid
> > > > > > > of odd problems.
> > > > > > >
> > > > > > > Peter Oliver
> > > > > > > Tucson Radio TV
> > > > > > >
> > > > > > >
> > > > > > > From: kevinstv <kevinstv@xxxxxxx>
> > > > > > > Reply-To: techassist@xxxxxxxxxxxxx
> > > > > > > To: TECH-ASSIST <techassist@xxxxxxxxxxxxx>
> > > > > > > Subject: [TechAssist] Sony KV27HSR10 1989
> > > model, loss of sound
> > > > > > > Date: Tue, 08 Oct 2002 18:48:19 -0700
> > > > > > >
> > > > > > > Sony KV27HSR10 1989 model, loss of sound
> > > > > > >
> > > > > > > Hi fellow techs,
> > > > > > >
> > > > > > > Does anyone know if this model of Sony has
> > > the SBX-1637 sound
> > > module?
> > > > I
> > > > > > > have to do a service call and it would be
> > > helpful if I knew what to
> > > > > > expect.
> > > > > > > Thankyou.
> > > > > > >
> > > > > > > Kevin Wilks
> > > > > > > Kevin's TV and Video Repair
> > > > > > > Penticton BC Canada
> > > > > > > kevinstv@xxxxxxx
> > > > > > >
> > > > > > >
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> > =====
> > Jorge Aguado-Puerto Rico
> > J.C.Electronic Repairs
> > Tel:787-761-0920
> > jorge_miret@xxxxxxxxx
> >
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