[TechAssist] Re: Sanyo TV - DS27510 - Won't turn OFF - FIXED
- From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 25 Feb 2004 18:03:53 -0500
Thanks to all who responded, thanks for the schematic, you know who you
are. The problem was not the relay; the relay on this chassis is for the
degaussing coil. Problem was a leaky zener D629 (16V-1/2W), the leak
supplied enough voltage thru surface mount resistor R629 (1K) causing
Q681 to stay on, Q681 supplies most of the standby voltages. At first
the problem seemed like a bad POWER ON line from the micro because the
voltage at the base of Q681 via R683 (4.7K) from the micro never changed
when the ON/OFF button was pressed. Lifting one end of R683 confirmed
the micro POWER ON line was functional changing from 0V to 5V.
Again thanks to all those who helped, this is what it's all about.
"Share what you know, Learn what you don't"
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
tvservice@xxxxxxxxxxxxx
Sent: Tuesday, February 24, 2004 6:46 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Sanyo TV - DS27510 - Won't turn OFF - Followup
I have Sams on the AVM2751
it shows 1 relay RL001 AC power on relay
If your set powers up with this relay out of circuit you have a bridge
on
the board at the switch contacts.
this relay opens the AC power to the main bridge rectifier circuit, also
to
the degaussing circuit thru PS001 thermitors.
there is Q052 off pin 37 of micro IC532 that drives this relay
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
Dallas, TX
----- Original Message -----
From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, February 24, 2004 4:49 PM
Subject: [TechAssist] Re: Sanyo TV - DS27510 - Won't turn OFF - Followup
> 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
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > >
> >
>
------------------------------------------------------------------------
> > > > > > --
> > > > > > ---
> > > > > > > Lost Password:
> > > > > > > http://www.tech-assist.org and select
> > > "Login Problems?".
> > > > > > > Email Archives:
> > > > > > >
> > > //www.freelists.org/archives/techassist/
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > >
> >
>
------------------------------------------------------------------------
> > > > > > -----
> > > > > > Lost Password:
> > > > > > http://www.tech-assist.org and select "Login
> > > Problems?".
> > > > > > Email Archives:
> > > > > > //www.freelists.org/archives/techassist/
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > >
> >
>
------------------------------------------------------------------------
> > > > > > -----
> > > > > > Lost Password:
> > > > > > http://www.tech-assist.org and select "Login
> > > Problems?".
> > > > > > Email Archives:
> > > > > > //www.freelists.org/archives/techassist/
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > >
> >
>
------------------------------------------------------------------------
> > > > > > -----
> > > > > > Lost Password:
> > > > > > http://www.tech-assist.org and select "Login
> > > Problems?".
> > > > > > Email Archives:
> > > > > > //www.freelists.org/archives/techassist/
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > >
> >
>
------------------------------------------------------------------------
> > > > > --
> > > > > ---
> > > > > > Lost Password:
> > > > > > http://www.tech-assist.org and select "Login
> > > Problems?".
> > > > > > Email Archives:
> > > > > > //www.freelists.org/archives/techassist/
> > > > > >
> > > > >
> > > > >
> > > > >
> > >
> >
>
------------------------------------------------------------------------
> > > > > -----
> > > > > Lost Password:
> > > > > http://www.tech-assist.org and select "Login
> > > Problems?".
> > > > > Email Archives:
> > > > > //www.freelists.org/archives/techassist/
> > > > >
> > > > >
> > > > >
> > >
> >
>
------------------------------------------------------------------------
> > --
> > > > ---
> > > > > Lost Password:
> > > > > http://www.tech-assist.org and select "Login
> > > Problems?".
> > > > > Email Archives:
> > > > > //www.freelists.org/archives/techassist/
> > > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
>
------------------------------------------------------------------------
> > ----
> > > -
> > > > Lost Password:
> > > > http://www.tech-assist.org and select "Login
> > > Problems?".
> > > > Email Archives:
> > > > //www.freelists.org/archives/techassist/
> > >
> > >
> > >
> > >
> >
>
------------------------------------------------------------------------
> > -----
> > > Lost Password:
> > > http://www.tech-assist.org and select "Login
> > > Problems?".
> > > Email Archives:
> > > //www.freelists.org/archives/techassist/
> >
> >
>
------------------------------------------------------------------------
> > -----
> > Lost Password:
> > http://www.tech-assist.org and select "Login Problems?".
> > Email Archives:
> > //www.freelists.org/archives/techassist/
> >
> >
>
------------------------------------------------------------------------
> > -----
> > Lost Password:
> > http://www.tech-assist.org and select "Login Problems?".
> > Email Archives:
> > //www.freelists.org/archives/techassist/
> >
> >
>
------------------------------------------------------------------------
> -----
> > Lost Password:
> > http://www.tech-assist.org and select "Login Problems?".
> > Email Archives:
> > //www.freelists.org/archives/techassist/
>
> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
>
>
------------------------------------------------------------------------
> -----
> Lost Password:
> http://www.tech-assist.org and select "Login Problems?".
> Email Archives:
> //www.freelists.org/archives/techassist/
>
>
>
------------------------------------------------------------------------
--
---
> Lost Password:
> http://www.tech-assist.org and select "Login Problems?".
> Email Archives:
> //www.freelists.org/archives/techassist/
>
------------------------------------------------------------------------
-----
Lost Password:
http://www.tech-assist.org and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/
-----------------------------------------------------------------------------
Lost Password:
http://www.tech-assist.org and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
- » [TechAssist] Re: Sanyo TV - DS27510 - Won't turn OFF - FIXED
