Re: 6101 Def Board Prob

Ok.

Bad Q100. Why? Dunno. Was replaced with the kit. Replaced again and now it
works.

Thanks all!
-roy-

----- Original Message -----
From: "chumblespuzz" <chumblespuzz@home.com>
To: <vectorlist@synthcom.com>
Sent: Tuesday, September 19, 2000 11:32 PM
Subject: Re: VECTOR: 6101 Def Board Prob

> I did not replace those, but they tested fine (in circuit). Perhaps I
should
> pull them and test them.
>
> -roy-
>
> ----- Original Message -----
> From: "Bret Pehrson" <bret@infowest.com>
> To: <vectorlist@synthcom.com>
> Sent: Tuesday, September 19, 2000 11:07 PM
> Subject: RE: VECTOR: 6101 Def Board Prob
>
>
> > Have you tested/replaced Q703 & Q704? (Does the zanen kit include these
> > transistors???). If not, I've had problems w/ fuse 700 on similar
boards
> > and the problem was one of these transistors.
> >
> > > -----Original Message-----
> > > From: owner-vectorlist@synthcom.com
> > > [mailto:owner-vectorlist@synthcom.com]On Behalf Of chumblespuzz
> > > Sent: Tuesday, September 19, 2000 8:22 PM
> > > To: vectorlist@synthcom.com
> > > Subject: Re: VECTOR: 6101 Def Board Prob
> > >
> > >
> > > Hi All,
> > >
> > > Ok. Tested with the output transistors unplugged and nothing blew. :)
> Now
> > > I've reconnected them and am quick to turn off the power before the
fuse
> > > blows.
> > >
> > > The problem seems to be in the low voltage circuit. Note - this was
> fully
> > > replaced (except for the caps) with the parts in the Zannen kit.
> > >
> > > The output from the bridge is a bit low: +30, -25. I've checked the
> diodes
> > > (out of circuit) and they all seem fine.
> > >
> > > The really weird thing is that where I should be getting +28 to
> > > the base of
> > > Q102, I'm getting -5!
> > >
> > > As I mentioned before, this board had ZD100 and ZD101 mis-labelled as
> R104
> > > and R105. I put the new Zeners in following the schematic and
confirming
> > > orientation with another board (properly labelled).
> > >
> > > Note, the transistors are ok - the monitor works perfectly with
> > > another def
> > > board.
> > >
> > > What did I screw up???"
> > >
> > > Thanks,
> > > -roy-
> > >
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "chumblespuzz" <chumblespuzz@home.com>
> > > To: <vectorlist@synthcom.com>
> > > Sent: Tuesday, September 19, 2000 8:23 AM
> > > Subject: VECTOR: 6101 Def Board Prob
> > >
> > >
> > > > Hi All,
> > > >
> > > > * I sent this message last night and still didn't receive it back
this
> > > > morning, so this is a resend. Sorry if it is a duplicate for you.
More
> > > stuff
> > > > added to this version anyway.*
> > > >
> > > > I'm working on a 6101. Zannen kit installed. Def board blows
> > > F700. Before
> > > it
> > > > blows there is only very light HV chatter. Spot killer is not on.
> Tested
> > > in
> > > > a known working monitor.
> > > >
> > > > I've looked in the FAQs, etc, but there is nothing referring to
F700.
> > > >
> > > > How would you suggest I troubleshoot? Is it safe to test with the
> > > deflection
> > > > transistors disconnected? Would that prevent F700 from blowing
> > > long enough
> > > > for me to troubleshoot?
> > > >
> > > > Also, this board had ZD100 and ZD101 mis labelled as R104 and R105.
Is
> > > this
> > > > an indication of an older version of the board?
> > > >
> > > > Thanks!
> > > > -roy-
> > > >
> > > >
> > > >
> > > >
> >
>
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Received on Wed Sep 20 00:25:53 2000