Re[2]: Vector's are hard to fix ? HA!

-----Original Message-----
From: Amplifone@aol.com
To: vectorlist@synthcom.com
Date: Mon, 10 Feb 2003 22:31:23 EST
Subject: Re: VECTOR: Vector's are hard to fix ? HA!

>
> well, we're getting off topic here.. but.
>
> In a message dated 2/10/03 7:30:56 PM, highwayman2000@mail.ru writes:
> > > Next person who says that is going to get . . .
> > >
> > > I'm fixing my first raster monitor -- a G07, and it comes time to check
> > the
> > > chasis mounted transistors. Bob Robert's tips page has all this talk
> > about
> > > soldering on them, and I'm saying to myself "Why is anyone resoldering on
> > > the socket. I mean, T03 transistors are socketed, right ?"
> > >
> > > Great Mother of Zeus -- they solder wires right on the transistors ! NO
> > > SOCKETS !!!!
> > > Oh give me my vector monitors with nice clean plugs, sockets, etc, any
> > day.
> >
> well, there are only 2 of them to be reckoned with, and the power reg doesn't
> fail that often. 2 wires to solder ain't bad.
>
> > > PS -- anyone who knows why a G07 would be blowing the 1.25 amp fuse when
> > the
> > > chasis transistors are NOT shorted to ground, the heater coil isn't
> > shorted
> > > to ground, and the flyback isn't cracked, I'm open to suggestions at this
> > > point.
> >
> G07s are actually pretty easy to fix.. if its blowing the 1.25 a fuse the
> problem is going to be a bad HOT or flyback most of the time. I've fixed 30
> or 40 of them in the past couple years and I've only seen 1 or 2 bad vertical
> transistors and the occasional shorted b+ reg (X04).
>
> > >if it was easy i would say isolate B+ and load it with a 40W 240v
> > lamp-bulb,
> > >of course being a G07 it is not easy, so maybe you will need to cut a
> > track.
> > >if you have a japanese copy then they (being smart) added a link you can
> > lift to isolate the B+ line!
> > >with B+ isolated and loaded you can check the regulator is running and
> > ajust it for 120v.
> > >if you get this far then ring the LOPT and suspect any secondary diodes.
> >
> b+ runs through the 1.25A fuse. If the fuse is out the b+ is isolated.. easy
> enough. the G07 is a Victor (JVC) chassis, Electrohome just bought it.
>
B+ does NOT run through the fuse, the unregulated dc input runs through the fuse, pulling the fuse will kill the B+.

as for JVC, well all i can say is that the JVC chasis has a B+ isolation-link and the 'native-american' chasis dont!

go out and get yourself a schematic.

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Received on Mon Feb 10 21:53:19 2003