Re: 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" <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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Received on Wed Apr 6 16:21:17 2005