[TechAssist] Re: Sanyo TV - DS27510 - Won't turn OFF - Followup

  • From: peggs <peggs@xxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx, <techassist@xxxxxxxxxxxxx>
  • Date: Wed, 25 Feb 2004 08:16:17 -0800

try to get a pin-out of the micro.
The on-off pin is the one to trace for the on-off Transistor(s).
You'll probably find one shorted.

Peggs


At 02:49 PM 2/24/04, David Lessard wrote:
>Phil,
>
>The relay was removed from the chassis with the same results. I was told
>that the relay on this chassis is for the thermistor/degaussing circuit.
>I'm lost here...what I need a schematic...AVM-2751 for Canada or DS27510
>in the US.
>
>Thanks for your response, I think I'm just going to purchase a
>schematic, it's the only way I'm going to figure this out.
>
>Alexandria Electronics
>50 Harrison Street
>Alexandria, Ontario
>K0C-1A0
>
>mr_fixit@xxxxxxxxxxxx
>
>
>-----Original Message-----
>From: techassist-bounce@xxxxxxxxxxxxx
>[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Phil Bader
>Sent: Tuesday, February 24, 2004 5:12 PM
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Re: Sanyo TV - DS27510 - Won't turn OFF - Followup
>
>This may be a power supply issue . Think of it as not letting it turn
>off al the
>way rather than turning on by itself In the area of the opto-coupler,
>check all
>the transistors nearby. May have to remove to test for leakage.
>I wonder if you could trace back from the relay driver transistor to the
>micro
>pin that gives the "on" command. And lift that micro pin to see.
>Phil.
>
>David Lessard wrote:
>
> > Jeff,
> >
> > Removed the EEPROM - no difference. Do you or any other members have a
> > schematic for this model?
> >
> > Thanks,
> >
> > David Lessard
> >
> > Alexandria Electronics
> > 50 Harrison Street
> > Alexandria, Ontario
> > K0C-1A0
> >
> > mr_fixit@xxxxxxxxxxxx
> >
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Intrepid Video
> > Support
> > Sent: Monday, February 23, 2004 9:49 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: Sanyo TV - DS27510 - Won't turn OFF -
>Followup
> >
> > As mentioned, I believe this relay is for the degaussing...
> > Hows about the EEPROM?
> > Remove the EEPROM and see if the set comes on/off.
> >
> > Jeff Dougherty
> > Intrepid Video TV/VCR
> > 263 S Front St
> > Steelton PA 17113
> > fax...717-564-4952
> > www.intrepid-video.com www.tech-repair.net
> >
> > ----- Original Message -----
> > From: "Jim Shupe" <jim@xxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, February 23, 2004 4:07 PM
> > Subject: [TechAssist] Re: Sanyo TV - DS27510 - Won't turn OFF -
>Followup
> >
> > whack the relay... it's probably stuck.. I've seen a
> > lot of Sanyo and Panasonic with this problem.
> >
> > Jim Shupe, CET
> > Yucca Valley, CA
> > jim@xxxxxxxxxxxxx
> >
> > --- Terry J Hutchison <sony1@xxxxxxxx> wrote:
> > > Fixed one like that about a year ago.  Don't have
> > > prints but look at the
> > > small transistors right around that relay area, one
> > > of them is probably
> > > shorted or open.  I am sure that is your problem.
> > > Terry
> > >
> > >
> > > > [Original Message]
> > > > From: Bob@Bobs tv <woodman1@xxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Date: 2/23/04 9:35:21 AM
> > > > Subject: [TechAssist] Re: Sanyo TV - DS27510 -
> > > Won't turn OFF - Followup
> > > >
> > > > Dave,
> > > >        I would try  removing the relay...Then your
> > > 100% sure its not
> > > that...
> > > > I did the same thing with the Panasonic, testing
> > > relay transistor, pulse
> > > > from micro...then I removed/replaced the relay and
> > > that took care of the
> > > > problem...Panasonic was doing EXACT same thing as
> > > your Sanyo...{I thought
> > > it
> > > > can't be relay as it clicks on/off}
> > > > Bob,
> > > >
> > > > Bobs TV   Worcester, ma
> > > >
> > > > woodman1@xxxxxxxx
> > > >
> > > > Main  508-853-1482
> > > > Fax    508-853-1480
> > > > ----- Original Message -----
> > > > From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Saturday, February 21, 2004 12:20 PM
> > > > Subject: [TechAssist] Re: Sanyo TV - DS27510 -
> > > Won't turn OFF - Followup
> > > >
> > > >
> > > > > Customer dropped off TV today. When plugged in
> > > HV fires up but with no
> > > > > picture. Hit the ON button and there is a
> > > picture with sound, turn TV
> > > > > off and audio goes off but picture remains.
> > > Checked the relay and its
> > > > > not stuck. This TV has a surface mount micro on
> > > the foil side of the
> > > > > PCB, what I need is information on the relay
> > > circuit from the micro to
> > > > > the relay please.
> > > > >
> > > > > Thanks.
> > > > >
> > > > > David Lessard.
> > > > >
> > > > > Alexandria Electronics
> > > > > 50 Harrison Street
> > > > > Alexandria, Ontario
> > > > > K0C-1A0
> > > > >
> > > > > mr_fixit@xxxxxxxxxxxx
> > > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: techassist-bounce@xxxxxxxxxxxxx
> > > > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On
> > > Behalf Of Webster TV
> > > > > Sent: Tuesday, February 17, 2004 2:05 PM
> > > > > To: techassist@xxxxxxxxxxxxx
> > > > > Subject: [TechAssist] Re: Sanyo TV - DS27510 -
> > > Won't turn OFF
> > > > >
> > > > > David,
> > > > >
> > > > > It definitely can be the relay if your unit uses
> > > a relay in the power
> > > > > circuit. Some sets only use the relay in the
> > > degaussing circuit. I've
> > > > > run
> > > > > into this numerous times on Quasar/Panasonics,
> > > you push power to shut
> > > > > the
> > > > > unit off and the on screen display and audio go
> > > off, but the picture
> > > > > will
> > > > > slightly dim down, but stay on. Replacing the
> > > relay solves the problem.
> > > > >
> > > > >                                       Dan
> > > Webster
> > > > >                                       Webster's
> > > TV
> > > > >
> > > Shullsburg, Wi.
> > > > > ----- Original Message -----
> > > > > From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Monday, February 16, 2004 6:29 PM
> > > > > Subject: [TechAssist] Re: Sanyo TV - DS27510 -
> > > Won't turn OFF
> > > > >
> > > > >
> > > > > > Furthermore one would think that if the relay
> > > was stuck that the TV
> > > > > > would never turn off. I'll have to check this
> > > problem out first hand
> > > > > > when I visit the customer this week. Thanks
> > > for the responses, it give
> > > > > > me something to think about.
> > > > > >
> > > > > > David Lessard
> > > > > >
> > > > > > Alexandria Electronics
> > > > > > 50 Harrison Street
> > > > > > Alexandria, Ontario
> > > > > > K0C-1A0
> > > > > >
> > > > > > mr_fixit@xxxxxxxxxxxx
> > > > > >
> > > > > >
> > > > > > -----Original Message-----
> > > > > > From: techassist-bounce@xxxxxxxxxxxxx
> > > > > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On
> > > Behalf Of Intrepid Video
> > > > > > Support
> > > > > > Sent: Monday, February 16, 2004 4:14 PM
> > > > > > To: techassist@xxxxxxxxxxxxx
> > > > > > Subject: [TechAssist] Re: Sanyo TV - DS27510 -
> > > Won't turn OFF
> > > > > >
> > > > > > I would not think it is the relay..if it was,
> > > the picture would not
> > > > > come
> > > > > > on.
> > > > > >
> > > > > > Jeff Dougherty
> > > > > > Intrepid Video TV/VCR
> > > > > > 263 S Front St
> > > > > > Steelton PA 17113
> > > > > > fax...717-564-4952
> > > > > > www.intrepid-video.com www.tech-repair.net
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Monday, February 16, 2004 3:51 PM
> > > > > > Subject: [TechAssist] Re: Sanyo TV - DS27510 -
> > > Won't turn OFF
> > > > > >
> > > > > >
> > > > > > Bob,
> > > > > >
> > > > > > Was it a defective relay or the relay
> > > circuitry?
> > > > > >
> > > > > > Thanks for the information.
> > > > > >
> > > > > > David Lessard
> > > > > >
> > > > > > Alexandria Electronics
> > > > > > 50 Harrison Street
> > > > > > Alexandria, Ontario
> > > > > > K0C-1A0
> > > > > >
> > > > > > mr_fixit@xxxxxxxxxxxx
> > > > > >
> > > > > >
> > > > > > -----Original Message-----
> > > > > > From: techassist-bounce@xxxxxxxxxxxxx
> > > > > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On
> > > Behalf Of Bob@Bobs tv
> > > > > > Sent: Monday, February 16, 2004 3:35 PM
> > > > > > To: techassist@xxxxxxxxxxxxx
> > > > > > Subject: [TechAssist] Re: Sanyo TV - DS27510 -
> > > Won't turn OFF
> > > > > >
> > > > > > Dave,
> > > > > >        Just repaired a 27" Panasonic EXACT
> > > same  problem, it was the
> > > > > > power
> > > > > > relay.
> > > > > > Bob,
> > > > > >
> > > > > > Bobs TV   Worcester, ma
> > > > > >
> > > > > > woodman1@xxxxxxxx
> > > > > >
> > > > > > Main  508-853-1482
> > > > > > Fax    508-853-1480
> > > > > > ----- Original Message -----
> > > > > > From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Monday, February 16, 2004 1:46 PM
> > > > > > Subject: [TechAssist] Sanyo TV - DS27510 -
> > > Won't turn OFF
> > > > > >
> > > > > >
> > > > > > > Customer called and explained the problem as
> > > not being able to turn
> > > > > > off
> > > > > > > this TV. When the on/off button is pressed
> > > the audio and picture
> > > > > goes
> > > > > > > off but then the picture returns without
> > > audio. If the on/off button
> > > > > > is
> > > > > > > pressed again the audio comes up. Weird, I
> > > would like to arm myself
> > > > > > with
> > > > > > > whatever details of this problem before
> > > visiting the customer.
> > > > > > >
> > > > > > > Thanks in advance,
> > > > > > >
> > > > > > > David Lessard
> > > > > > >
> > > > > > > Alexandria Electronics
> > > > > > > 50 Harrison Street
> > > > > > > Alexandria, Ontario
> > > > > > > K0C-1A0
> > > > > > >
> > > > > > > mr_fixit@xxxxxxxxxxxx
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > >
> >
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>--
>
>Philip Bader
>Jan Phyl TV Inc. (estab. 1976)
>3420 Recker Hwy. Winter Haven, Fl. 33880
>Fax (863) 299-8821
>email: tjanphyl@xxxxxxxxxxxxxxx
>
>
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