[TechAssist] Re: Sanyo DS25204 No vertical
- From: "John" <maintv2004@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 11 Apr 2005 11:53:55 -0600
Yes, +26 volts. In this set it comes from the SMPS, not from the flyback.
This is a newer set, less than a year old. I do not have an exact
schematic, I was using Sams 4801. It is for the same chassis number but my
model has a VM after it (vertical modified? Just guessing) Usually if the
horizontal is running, there will also be a vertical drive. I just wanted
to verify the correct pin for vertical drive from IC101. It may be possible
the set is in some kind of service mode. I do not have the original remote.
I think I will call the customer to bring it in. This set should be in
warranty but he said he "lost the receipt". That always makes me wonder.
Thanks, John.
John Mielke
Main TV
Longmont, Co.
www.longmontmaintv.com
303 776 6955
----- Original Message -----
From: "Terry J Hutchison" <sony1@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, April 09, 2005 10:15 PM
Subject: [TechAssist] Re: Sanyo DS25204 No vertical
> Do you have B+ to the vert IC? Don't mean to insult your intelligence,
but
> you could also check the diode that connects pin 1 or 7 to the other let
of
> the vert IC to see if the volts are present there to. I have also seen a
> bad tuner cause a loss of vert in those older Sanyo's you can desolder the
> tuner and see if you get your scan back. Hope this helps and let me know
> about the B+.
> Terry
>
>
> > [Original Message]
> > From: John <maintv2004@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Date: 4/9/2005 5:16:19 PM
> > Subject: [TechAssist] Sanyo DS25204 No vertical
> >
> > I'm working on a Sanyo DS25204 (chassis 25204-01) made in 2004. I have
> ho vertical but high voltage and sound are OK. I do not see a drive
> waveform out of IC101 pin 26. I have isolated that pin from any shorts. I
> do not have the exact schematic. Can someone verify that pin 26 is the
> vertical drive out of this chip (LA76843N) or have any suggestions as to
> what could be wrong. I find it strange that everything works except the
> vertical. TIA, John.
> > John Mielke
> > Main TV
> > Longmont, Co.
> > www.longmontmaintv.com
> > 303 776 6955
> >
> >
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