Vectorlist Archives: Re: Tempest - WG6100 Purity re-adjustment w

From: Colin Davies <colin.w.davies_at_btopenworld.com>
Date: Mon Sep 22 2008 - 18:13:03 EDT

Thanks guys.....

I've switched it on a couple of times now and the pink web is starting to turn blue..... just needs some more teasing..... Hopefully fingers crossed it will adjust itself.....

I've hopefully got a control panel and marquee on the way shortly, Thanks to Arcade OLL , and then I can resurrect the beast in full.....

Really really enjoyed this project so far, as have been missing the tech side.... Like I say, I was laid up ill in the house and had some spare time to tinker....

I havent really done any decent tech in a couple of years.. I think the last time I delved in deep was when we fixed a friends Battlezone cab over a weekend meet ( The BZ machine came from the USA via Archer ) and we (myself and my friend Kev/Outrun) got it running in the UK for the first time in its life....

I rebuilt the monitor, and then I was diagnosing the pcb faults and my friend was doing the pcb reworking.. made a really good team.. plus a third worker who was supplying food and coffee.. but that's another story.... Thanks Marmy...

I'll hopefully post back when the Tempest monitor has all settled down, and I have all the parts together to complete the cab....

Kind Regards, and thanks for all the advice :-)

Colin

  ----- Original Message -----
  From: Pat Danis
  To: vectorlist@vectorlist.org
  Sent: Monday, September 22, 2008 10:18 PM
  Subject: Re: VECTOR: Tempest - WG6100 Purity re-adjustment when monitor is rotated 90'

Most 6100's need to have the degauss resistor replaced due to being tested without having the degauss coil plugged in. I would say 99% of my deflection boards needed to have the blue resistor on the LH side midway up replaced. The degauss circuit really only works the first time you power up the chassis as there is a thermistor in the circuit that keeps it from running each time. So, good advice. Just try it every few days after being reinstalled in the cabinet. if the colors are still messed up, get a degaussing coil and do it manually.

Pat D.

kstillinger@sc.rr.com wrote:
I wouldn't start messing with the yoke and color setup just yet.

If it looks good in one orientation but not another, it probably just needs degaussing. There's an automatic degauss circuit on the board. I would just let it do it's magic over the next few times that it gets turned on and off over and over.

If the mask has been magnetized more than just a little, you could go through and degauss it with an external coil. Try this before going through the color setup.

---- Colin Davies <colin.w.davies@btopenworld.com> wrote:
Hi Guys...

Here's an easy question for you tech guru's.... When the monitor is
horizontal, all the colours are really nice and well defined... ( The
monitor was in a Starwars cab)

Now I've rotated the montor, the colours are all to pot. :-( The blue has
gone kind of pinky for a start and the green has gone orange iirc... (you
can see this on the video I posted on youtube last night !!)

So... I've read the service manual for the monitor and it mentions loosening
the yoke and sliding back and forth to get a good purity... then to adjust
the rings to get the convergence and fine purity adjust..

Surely I'm asking for trouble moving the yoke... Can I just adjust the
purity rings on the tube ? I'm scared to touch it in case I mess it up...
:)

Anyone had to do this when swapping a vector monitor out before ?

Thanks for your advice... Regards, Colin

Ps... The game started drawing the odd vectors, and then failed completely
again !! - It had blew Ram J3... Thats a few I've replaced so far now !!

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Re: Tempest - WG6100 Purity re-adjustment when monitor is rotated 90'