Re: Tempest WG6100 Blows F700

From: <akswanson_at_ntelos.net>
Date: Thu Oct 11 2012 - 09:43:18 EDT

        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 Jerry,

>

> I don&#39;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.

>
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>

>

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Received on Thu Oct 11 09:43:32 2012

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