Re: VECTOR: SW monitor prob...

It is in focus,
just a really large image so some of the image is off the screen....


Pinx

----- Original Message ----- 
From: "Thad Seeberger" <[email protected]>
To: <[email protected]>
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:[email protected]>
>>     *To:* [email protected] <mailto:[email protected]>
>>     *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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