Re: WG v2000 help please

Thanks for the reply. It sounds like you think the problem is on the
deflection board. As it is now I do hear vector chatter and the spot
killer is off. I was thinking of looking into the common amplifier
circuitry (Q504, etc.) Does that seem reasonable?

On Tue, Dec 20, 2011 at 3:01 PM, John Robertson <pinball@telus.net> wrote:

> Carlos Rubio wrote:
>
>> After replacing a broken HV diode, my v2000 worked briefly. However,
>> after a few minutes I noticed that there was arcing at the HV diode. I
>> shut the monitor down and added more silicon to the HV diode connections.
>> After it was dry I powered it back up. There was no longer any arcing.
>> However there was no picture, and after a minute or so R613 on the
>> deflection board caught on fire. R618 was also fried.
>>
>> I replaced the fried components as well as several other components in
>> the Y section of the deflection board. After doing this, the monitor will
>> now power up without anything catching on fire. There is no picture. The
>> continuity of all fuses has been verified. The spot killer is not on. I
>> can hear vector chatter. The heater is glowing. The brightness and
>> contrast controls do nothing.
>> Following the troubleshooting guide in the FAQ I went ahead and replaced
>> the HV diode AGAIN, and this time made sure the ends were well insulated
>> before firing it up. However that made no difference.
>>
>> I don't have an HV probe so I can't check the HV at the annode. I can
>> feel static on the front of the monitor and a piece of paper will cling to
>> the front. I'm not sure if this is sufficient to prove that high voltage
>> is present? I verified the voltages at J900 on the HV board.
>>
>> SO... should I concentrate my troubleshooting on the HV board or on the
>> deflection board? Reading about the way this thing operates, it seems
>> possible that something in the oscilator circuitry is faulty, perhaps fried
>> by the arcing? I'm hoping I can rule out the flyback itself, since at
>> least the secondary windings seems to be working, as verified at J900.
>>
>> Monitor gurus, please chime in. Thanks,
>>
>> Carlos
>>
> Sounds like you fixed the HV problem, a check is to leave it running for a
> few minutes then check the temperature of the HV diode itself. It should be
> at room temperature. If you have an IR probe that would be better in case
> the insulation isn't as good as you think it is...
>
> So, now fix the deflection board.
>
> If you are concerned about the HV you can simply unplug it - once the
> deflection board is running again (makes the correct noise/chatter, and LED
> is off) then you can power off and again hook up the HV cage and see if a
> picture appears...
>
> John :-#)#
>
> --
> John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
> (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
> www.flippers.com "Old pinballers never die, they just flip
> out"
>
> ------------------------------**------------------------------**
> ---------------
> ** 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 Tue Dec 20 15:24:58 2011