[TechAssist] Re: RCA Flyback 237506(fixed!)
- From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 6 Apr 2004 16:32:16 -0400
I sure would like to know what was fixed Chassis #??
Phillip R Hull STET
phil245@xxxxxxxxxxxxx
FAX 517--569-3075
Professional Technicians only
----- Original Message -----
From: "Jim Shupe" <jim@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, April 06, 2004 4:13 PM
Subject: [TechAssist] Re: RCA Flyback 237506(fixed!)
> John...
>
> This is a newer foil pattern that doesn't have the
> jumper... I've never had one inadvertently come off
> with my solder-sucking anyhow, but I've read the sheet
> that comes with the part.
>
> I guess I just had a brain fart last week and missed
> the most elemental possibility(which you pegged). The
> last shorted CRT spark-gap short I had was on a fairly
> new Zenith Chroma Color II, so I guess it drifted out
> of my head as a possibility.
>
> I checked with my ohmmeter when I got to the shop
> this morning and couldn't detect the short, but when I
> lifted the 2.2K series resistor to the G2 land, I got
> screen supply(I should have done that last week- I
> know better!). Once I removed the socket, I could see
> the burn on the board, on the socket at G2 and at
> ground.
>
> Anyway the set's fixed, I feel properly chagrined,
> and the customer's happy.
>
> Thanks for the tip, John, and thanks to everyone
> else who took the time to respond.
>
> Jim Shupe, CET
> Lloyd's TV
> Yucca Valley, CA
>
> An
>
> --- "John @ Myers TV" <myers_tv@xxxxxxxxxxxxx> wrote:
> > Jim,
> >
> > I just changed one since I e-mailed you.
> >
> > There is a chip jumper between pins 7 & 8 of the
> > fly. No video is one of the
> > symptoms if the jumper is missing.
> >
> > John Myers
> > Myers TV Service Since 1984
> > Alliance, OH
> > ph 330-821-6545
> > ----- Original Message -----
> > From: "Jim Shupe" <jim@xxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, April 06, 2004 10:36 AM
> > Subject: [TechAssist] Re: RCA Flyback 237506
> >
> >
> > > John..
> > >
> > > No, this one doesn't have the jumper. I am going
> > to
> > > check the CRT socket though, as it's still
> > connected.
> > > Thanks for the input!
> > >
> > > BTW.. the original was shorted, but still rang
> > good
> > > with my trusty Heathkit ringer. I think this is
> > common
> > > with this family of IHVT's.
> > >
> > > Jim Shupe, CET
> > > Lloyd's TV
> > > Yucca Valley, CA
> > >
> > >
> > > --- "John @ Myers TV" <myers_tv@xxxxxxxxxxxxx>
> > wrote:
> > > > Jim,
> > > >
> > > > I just had one like that that turned out to be a
> > > > shorted CRT socket.
> > > > Also, is this the one that has the jumper
> > between
> > > > the two pins on the fly?
> > > > those have a nasty habit of "disappearing" while
> > > > resoldering.
> > > >
> > > > John Myers
> > > > Myers TV Service Since 1984
> > > > Alliance, OH
> > > > For Professional Technicians ONLY
> > > > ph 330-821-6545
> > > >
> > > > ----- Original Message -----
> > > > From: "Jim Shupe" <jim@xxxxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Tuesday, April 06, 2004 10:11 AM
> > > > Subject: [TechAssist] RCA Flyback 237506
> > > >
> > > >
> > > > > Hey Guys...
> > > > >
> > > > > Has anyone had problems lately with this
> > > > part(new)
> > > > > or am I just getting dumb in my old age?
> > > > > I have installed two new IHVT's in this set
> > and
> > > > both
> > > > > had no screen voltage output. The heaters, HV,
> > > > > secondary supplies are all there.
> > > > > To my knowledge, the screen output is
> > totally an
> > > > > internally derived voltage(at least in RCA).
> > > > > BTW.. I removed everything from the screen
> > > > output to
> > > > > eliminate possible shorts.
> > > > >
> > > > > This has me baffled as I have never had a
> > > > problem
> > > > > with a new RCA fly.
> > > > >
> > > > >
> > > > > Jim Shupe, CET
> > > > > Lloyd's TV
> > > > > Yucca Valley, CA
> > > > >
> > > > >
> > > >
> > >
> >
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