Andre, replace Q706 if you are walling on the left hand side of the
screen, its not neccesary to replace all transistors, Q706 is probably
your culprit, there's very a slim chance that Q705 causes 706 to not
deflect fuly but that is an outside chance, go for Q706 first, its the
2n3792 nearest the HV box mounted on the flat base of the chassis.
Andrew Welburn
http://www.andys-arcade.com
On 22/09/2012 22:45, Andre Huijts wrote:
> Are walling problems always the deflection transistors ? Interesting,
> I've asked around a lot about this problem but never got a good answer.
>
> Here a video of what I've seen on a 6100 chassis running a low res 25" CRT:
>
> http://m.youtube.com/watch?v=aePHZsifvIA
>
>
> Verstuurd vanaf mijn iPad
>
> Op 22 sep. 2012 om 21:21 heeft Kevin Moore <talon.k@gmail.com
> <mailto:talon.k@gmail.com>> het volgende geschreven:
>
>> Looks like a walling problem. I think Colin is right, replace the
>> frame mounted transistors.
>>
>> Kevin
>>
>>
>> On Sat, Sep 22, 2012 at 12:21 PM, Gavin Benson <gavin.benson@gmail.com
>> <mailto:gavin.benson@gmail.com>> wrote:
>>
>> I have tried two working Star Wars PCBs in my cab and both show a
>> vertical bar on the right side of the screen whenever you are hit
>> or when the Death Star explodes (either a white line or blue).
>> I think this bar should be off screen and used to briefly flash
>> the screen when this happens. Here are the pics:
>>
>> https://www.dropbox.com/sh/9fthrvvlxkp9x7o/Hl9lyREjq2
>>
>> Also in the second pic you can see the right gun that has its
>> vectors crushed.
>>
>> I have tried moving x-centre left a bit which improves the right
>> gun a little but it doesn't fix the white line when you are hit.
>> It isn't ideal doing this since the picture is off centre.
>>
>> All my voltages are spot on, chassis transistors give good
>> readings, any ideas?
>>
>> Thanks
>>
>> Gavin
>>
>>
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Received on Sun Sep 23 05:09:00 2012
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