Re: SW monitor prob...

Perhaps the DAC reference voltage is wrong (too high)?

Pinx wrote:

> The game had been playing fine for ages and just went, so i guessed it
> to be a monitor problem, maybe i should try them, i'll give it a go......
>
> thanx to everyone for all the info....
>
>
>
>
> Pinx
> ----- Original Message ----- From: "Chris Loggans" <cloggans@yahoo.com>
> To: <vectorlist@vectorlist.org>
> Sent: Wednesday, April 06, 2005 10:37 PM
> Subject: Re: VECTOR: SW monitor prob...
>
>
>> Did you try adjusting the image size on the game
>> boards?
>>
>> Thanks,
>> -Chris
>>
>> --- Pinx <pinx.32@tesco.net> wrote:
>>
>>> It is in focus,
>>> just a really large image so some of the image is
>>> off the screen....
>>>
>>>
>>> Pinx
>>>
>>> ----- Original Message ----- From: "Thad Seeberger" <maddthad@jlab.org>
>>> To: <vectorlist@vectorlist.org>
>>> Sent: Wednesday, April 06, 2005 9:15 PM
>>> Subject: Re: VECTOR: SW monitor prob...
>>>
>>>
>>> > Is the image focused? if its focused (DURING
>>> BLOOM) you have XY drive
>>> > problem. Check the focus block you could have
>>> something leaky make sure
>>> > there is no corona. When measuring the HV is it ok
>>> while blooming (loaded)
>>> > or with no drive. If its fluctuating there is a
>>> problem with the
>>> > regulator. If its bllooming because of HV drop you
>>> will loose focus also
>>> > since the focus is just a divider of the HV. Make
>>> sure there is no DC
>>> > offset on XY input. I havent been following this
>>> thread so you might have
>>> > already checked but I cant think of what else
>>> would make it bloom other
>>> > than a CRT with low emision, is the heater got
>>> 6.3V on it? and all the
>>> > connections good on the socket such as cathode,
>>> heater, focus etc. It
>>> > definately sounds like a regulation problem. I
>>> would buy the repacement HV
>>> > kit from arcadeshop. I've installed a few of them
>>> and I think they are
>>> > well worth it.
>>> >
>>> > Thad
>>> >
>>> >
>>> > Pinx wrote:
>>> >
>>> >> Right,
>>> >> now i am really baffled, not only have i
>>> re-capped it but now i have
>>> >> replaced the transistors at Q901, Q902, Q903,
>>> Q904 and replaced the
>>> >> Zeners at ZD900, ZD901, ZD902. I have also
>>> replaced the resistors at
>>> >> R912, R920, R922, R925.
>>> >> I put my HV probe in with the monitor switched
>>> on and set the HV to
>>> >> 19500V and still the image on the screen is
>>> massive !!!
>>> >> Starting to pull my hair out now (not that ive
>>> got much) any more idea's
>>> >> anyone ? Should the HV be measured with the game
>>> pcb unplugged ?
>>> >> Pinx
>>> >> ----- Original Message -----
>>> >> *From:* Pinx <mailto:pinx.32@tesco.net>
>>> >> *To:* vectorlist@vectorlist.org
>>> <mailto:vectorlist@vectorlist.org>
>>> >> *Sent:* Friday, April 01, 2005 7:36 PM
>>> >> *Subject:* VECTOR: SW monitor prob...
>>> >>
>>> >> Hi guys,
>>> >> just recently the WG in my SW has developed
>>> a problem where the
>>> >> image is massive, so you cant see it all on
>>> the screen. I have
>>> >> been told this is "blooming" and so i have
>>> just re-capped the HV
>>> >> section, but i still have the problem. Is
>>> there anything else on
>>> >> the HV board i should replace to cure this
>>> problem ?
>>> >> TIA
>>> >> Pinx
>>> >>
>>> >
>>> >
>>>
>> ---------------------------------------------------------------------------
>>
>>
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>>>
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>>> > ** Please direct other questions, comments, or
>>> problems to
>>> > chris@westnet.com
>>> >
>>>
>>>
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>>>
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>>
>
> ---------------------------------------------------------------------------
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> chris@westnet.com
>
>

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Received on Thu Apr 7 02:22:49 2005