Re: Tempest WG6100 Blows F700

---- akswanson@ntelos.net wrote:
>
>
>
>
> F700 is the yoke protection, and it usually means your getting DC to the
> yoke.  It could be one of the output transistors or the MPS
> U57/U07.
>
>
Thanks... Have replaced ALL Q70x parts with new. None of the old parts tested bad. NTE49/50 for Q704/Q703 and PN3569 for Q700-Q702. And new Q705/Q706 parts as well. It blows with the game board disconnected so I suppose the next step is to see if it blows with the X pin removed from the connector to see if I have a harness problem. Or maybe just remove the power and see what readings I get on R700. I should be able to get the X/Y display on the scope from R600/R700.

Thanks for the information.

>  
>
>
> > Thanks Jerry,
>
> >
>
> > I don't think the problem is in the low voltage section (100s)
> of the
>
> > board. Something in the 700s seems to be the problem. If it were
> blowing
>
> > F100 for F101, that would be the case. It looks like I need to start
> at
>
> > P700 and work my way backwards, pins 3 and 7 control the base for
> the
>
> > deflection amplifiers so with HV disconnected, I should be able
> to
>
> > determine which of the +/- amplifiers are being activated. The +
> side
>
> > looks much simpler...
>
> >
>
> > Kirk S.
>
> > ----- Original Message -----
>
> >
>
> From: jerry madsen
>
> > To: vectorlist@vectorlist.org
>
> > Sent: Wednesday, October 10, 2012 6:43 PM
>
> > Subject: Re: VECTOR: Tempest WG6100 Blows F700
>
> >
>
> >
>
> > Check the 2 biggest Capacitors on the deflection board,meter them to
> see
>
> > if you have a short on one or both,i have same problem before and
> that
>
> > was the cure,maybe that will be your problem.
>
> > Jerry.
>
> >
>
> >
>
> >
>
> >
>
> From: Kirk Spradling <kspradling@kc.rr.com>
>
> > To: vectorlist@vectorlist.org
>
> > Sent: Wednesday, October 10, 2012 4:38 PM
>
> > Subject: VECTOR: Tempest WG6100 Blows F700
>
> >
>
> >
>
> > I was experiencing random garbage on my Tempest so I pulled the
> boards
>
> > out, removed the solder from the interboard connectors and
> resoldered
>
> > them. I put the board back into the machine and F700 blows
> instantly.
>
> > I have replaced ALL Q70x series including the chassis mounted
>
> > transistors and it still blows F700. I have disconnected the edge
>
> > connectors from the game board and it blows F700. I connected my
> Oscope
>
> > to the game board X/Y and it displays the game and test screens
>
> > perfectly with the same scale in X and Y. LV2000 installed years
> ago.
>
> > Transistors all test good and no shorts to chassis. First version
> of
>
> > the deflection board with no imput protection installed. Spot
> killer
>
> > lit.
>
> >
>
> > I&#39;m pretty sure that it is related to the game board repair
> however I am
>
> > at a loss as to what is going on since it blows without the game
> board.
>
> >
>
> > The 6100 Faq doesn&#39;t mention much about blowing the deflection
> fuses. I
>
> > guess I should start taking some measurements on the deflection
> board
>
> > itself to see where I am getting the full-on signal. Pull the X
>
> > amplifier connector and check some readings. I guess I had better
> look
>
> > at the schematic again.
>
> >
>
> > The diodes test ok as well. Guess I will start on the resistors.
>
> >
>
> > Thanks in advance...
>
> >
>
> > Kirk S.
>
> >
> ---------------------------------------------------------------------------
>
> > ** Unsubscribe, subscribe, or view the archives at
>
> > http://www.vectorlist.org
>
> > ** Please direct other questions, comments, or problems to
>
> > chris@westnet.com
>
> >
>
> >
>
> >
>

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Thu Oct 11 16:14:33 2012