RE: 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 Tue Sep 19 23:24:24 2000