[TechAssist] Re: DBTV2500 Repeat failure IC501
- From: "Rob Rattew" <rrattew9347@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 9 Jun 2004 22:41:40 -0400
Check C446 1mf 160v in horiz drive. decreases in value & causes repeat
failer of Q401 & IC501 etc.
Rob
Able TV
513 Perry St
Whitby On Canada
----- Original Message -----
From: "D Trippel" <dtrippel@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, June 09, 2004 8:52 PM
Subject: [TechAssist] Re: DBTV2500 Repeat failure IC501
> Hi!
> The reg always shorts, and takes out the two resistors and the hot. I
didn't ring
> the flyback. But if the set works for a month, I would think the flyback
would be
> good. But anything is possible. Everything appears to run cool after
replacement.
> And you can only have a set on the bench for so long. They are selling
these
> things so cheap I guess there designed to fail allot. I checked 519, It
tested
> good, but this time I will replace it. Thanks!
> Don
>
> John at Main TV wrote:
>
> > That would be the same as a Memorex in the US. You may need to have the
> > original regulator that has an internal connection to pin 5 (usually pin
5
> > is open). The output voltage should be 136.6v and the V on pin 2 should
be
> > 137.3v. Also check R506 (180-20watt) and R507 (47 ohm-quarter watt) and
> > C519 (10uf- 160v). How did the regulator fail originally, short or
open?
> > John.
> > John Mielke
> > Main TV
> > 636 main St.
> > Longmont, Co
> > phone 303 776 6955
> > fax 303 776 0792
> > maintv2004@xxxxxxxxxxx
> >
> > ----- Original Message -----
> > From: "D Trippel" <dtrippel@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, June 09, 2004 3:41 PM
> > Subject: [TechAssist] DBTV2500 Repeat failure IC501
> >
> > > Hello Everyone!
> > >
> > > I Have a couple of Durabrand DBTV2500 tv's that have repeat failure of
> > > ic 501 str30110 reg , R506 20w , R 508 and Q 401 hot. Both of these
> > > sets ran about a month and are back. Same problem. Has anyone out
there
> > > found the cause . I have checked a variety of components in the reg
> > > circuit , and other than the parts listed everything checks out fine.
> > > Any help would be appreciated.
> > > Don trippel
> > > Don's Electronics
> > > Rosthern,Sask
> > > Canada
> > >
> > >
> > >
> >
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>
> John at Main TV wrote:
>
> > That would be the same as a Memorex in the US. You may need to have the
> > original regulator that has an internal connection to pin 5 (usually pin
5
> > is open). The output voltage should be 136.6v and the V on pin 2 should
be
> > 137.3v. Also check R506 (180-20watt) and R507 (47 ohm-quarter watt) and
> > C519 (10uf- 160v). How did the regulator fail originally, short or
open?
> > John.
> > John Mielke
> > Main TV
> > 636 main St.
> > Longmont, Co
> > phone 303 776 6955
> > fax 303 776 0792
> > maintv2004@xxxxxxxxxxx
> >
> > ----- Original Message -----
> > From: "D Trippel" <dtrippel@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, June 09, 2004 3:41 PM
> > Subject: [TechAssist] DBTV2500 Repeat failure IC501
> >
> > > Hello Everyone!
> > >
> > > I Have a couple of Durabrand DBTV2500 tv's that have repeat failure of
> > > ic 501 str30110 reg , R506 20w , R 508 and Q 401 hot. Both of these
> > > sets ran about a month and are back. Same problem. Has anyone out
there
> > > found the cause . I have checked a variety of components in the reg
> > > circuit , and other than the parts listed everything checks out fine.
> > > Any help would be appreciated.
> > > Don trippel
> > > Don's Electronics
> > > Rosthern,Sask
> > > Canada
> > >
> > >
> > >
> >
> --------------------------------------------------------------------------
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> > > http://www.tech-assist.org and select "Login Problems?".
> > > Email Archives:
> > > //www.freelists.org/archives/techassist/
> > >
> >
>
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>
>
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