Re: Another 19v2000 ?

Currently not at the house, so I can't give you power measurements. But I
can say that if you unplug the PCB the spot killer led comes on, if you
unplug x, y, or z spot killer led comes on.

Kevin

On Fri, Jan 8, 2010 at 3:55 PM, Colin Davies <colin.w.davies@btopenworld.com
> wrote:

> That sounds ODD to me... as afaik, the spot killer derives its input from
> the Yoke signal feedback to the amplifier circuit.... unless I'm barking up
> the wrong tree ?
>
> Whats the Power Look like then ?
>
> If you unplug the Asty PCB, and power up, does the spot killer come on then
> ???
>
> Cheers, Colin
>
> ----- Original Message -----
> *From:* Kevin Moore <talon.k@gmail.com>
> *To:* vectorlist@vectorlist.org
> *Sent:* Friday, January 08, 2010 1:42 PM
> *Subject:* Re: VECTOR: Another 19v2000 ?
>
> There is no chatter :(
>
> I was thinking it would be in the spot killer out Z amp sesction, but have
> yet to find anything.. I'll keep digging..
>
> And yes it is an Asteroids boards. :)
>
> Kevin
>
>
> On Fri, Jan 8, 2010 at 4:45 AM, COLIN DAVIES <
> colin.w.davies@btopenworld.com> wrote:
>
>> You say you have no deflection, but can you hear the Yoke Chattering ?
>> (Odd that the spot killer is off) - If so I'd say check the spot killer
>> output , Z amp section and brighness/contrast..
>>
>> Are you using an asteroids board to test it ? - I've found the beam spends
>> a bit of time in the middle of the screen when not drawing, giving me dots
>> in the middle on poor screens you see....
>> Cheers, Colin
>>
>> --- On *Thu, 7/1/10, Kevin Moore <talon.k@gmail.com>* wrote:
>>
>>
>> From: Kevin Moore <talon.k@gmail.com>
>> Subject: VECTOR: Another 19v2000 ?
>> To: vectorlist@vectorlist.org
>> Date: Thursday, 7 January, 2010, 23:54
>>
>>
>> Ok, I've got a 19v2000 that out of the blue just started producing a
>> single dot middle of the screen.
>>
>> Spot Killer LED is off, (yes it works)
>>
>> But getting no X Y deflection.
>>
>> I've read somewhere that cause was probably q503, and 504. Checked and
>> replaced both with good known. No help.
>>
>> Can swap with another deflection board, and it works fine. So game board
>> doesn't seem to be the problem.
>>
>> Kevin
>>
>>
>

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Received on Fri Jan 8 17:01:13 2010