[TechAssist] Re: Toshiba 27A51 dead
- From: "Bob@Bobs tv" <woodman1@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 7 Aug 2003 14:29:17 -0400
Walter,
Had a 27A10 in June very similar problem and used manual for a
27A50..
found micro bad.. QA01 pin #7 relay driver...see if it has 4.9 volts when
you push power, ours was erratic.. I can upload manual to Tech-Assist
tonight..{manual thanks to Bob W} Let me know...
Bob,
Bobs TV Worcester, ma
woodman1@xxxxxxxx
Main 508-853-1482
Fax 508-853-1480
----- Original Message -----
From: "walter wood" <wwood_38478@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, August 07, 2003 1:42 PM
Subject: [TechAssist] Re: Toshiba 27A51 dead
> Thanks, I'll take it out of circuit and check.
> Seems OK.
> I have an up to date WinsTips, and did not see a
> single entrey for 27A51!!!
> The 27A50 is different.
> Walter
> --- "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
> wrote:
> > Lightning usally shorts D-514
> > Its in Winstips
> >
> > Phillip R Hull STET
> > FAX 517--569-3075
> > ----- Original Message -----
> > From: "teltek3" <teltek3@xxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, August 07, 2003 12:40 PM
> > Subject: [TechAssist] Re: Toshiba 27A51 dead
> >
> >
> > > Walt;
> > > Will send you a couple of Flow Charts shortly,
> > pick the one that goes with
> > > that particular chassis.
> > >
> > > -Ed-
> > > Tel-Tek Electronics
> > > Ontario-Canada
> > > teltek3@xxxxxxxxxxxx
> > > ----- Original Message -----
> > > From: "walter wood" <wwood_38478@xxxxxxxxx>
> > > To: "Tech Assist" <techassist@xxxxxxxxxxxxx>
> > > Sent: Thursday, August 07, 2003 11:48 AM
> > > Subject: [TechAssist] Toshiba 27A51 dead
> > >
> > >
> > > >
> > > >
> > > > > Haven't found any flow charts or theory on
> > this
> > > > > one.
> > > > > Likely Toshiba didn't build it anyway.
> > > > >
> > > > > DEAD, nothin' at all when power is pushed.
> > > > > Lightning likely, but nothing burned and
> > fuse
> > > > > good.
> > > > On primary side
> > > > > IC501
> > > > > pin 1 167vdc
> > > > > 2 0
> > > > > 3 0
> > > > > 4 12 to 14vdc
> > > > > 5 0
> > > > On secondary side
> > > > > D 514 2.1 to 2.5vdc
> > > > > D 511 0 to 0.6
> > > > > D 512 4 to 5
> > > > > D 510 86 to 91
> > > > > D 505 0
> > > > > D 509 30
> > > > >
> > > > > I'm having a hard time deciding if the Scan
> > and
> > > > > Data lines are being pulled down, as it
> > looks
> > > > > like
> > > > > the 5 volts isn't being developed in the
> > first
> > > > > place.
> > > > Anyone seen one of these before?
> > > > > Ideas??
> > > > > Starting place??
> > > > > By the way, the 167 volts remains even when
> > the
> > > > > set
> > > > > is unplugged.
> > > > > perhaps something open in the primary?/
> > > > > Walter
> > > >
> > > >
> > > >
> > > > =====
> > > > Walter Wood
> > > > Future Tech Home Center
> > > > 2786 Hwy. 43 N.
> > > > Lawrenceburg Tn. 38464
> > > > 931-829-3337
> > > > Fax 931-829-4044
> > > > mailto:wwood_38478@xxxxxxxxx
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> =====
> Walter Wood
> Future Tech Home Center
> 2786 Hwy. 43 N.
> Lawrenceburg Tn. 38464
> 931-829-3337
> Fax 931-829-4044
> mailto:wwood_38478@xxxxxxxxx
>
> __________________________________
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