Re: V2000 Blooming issue

Pat, Interesting,,,,, I had something similar on a Tempest Machine ' many years ago '.... In the end it would up being the small - 3 - leg - Transistor - attached directly to the HV Cage. Of course there is no similiratiy since Tempest usese the 19Kxxxx - color Vector monitor. And as you have indicated this is a V2000 - 19 inch Black/White - monitor. But in my case the ' Blooming ' was caused by a suspect Transistor insulator (simple piece of plastic)  which was flaky at best and somehow was making a connection to Ground (in this case the HV Cage). By the way the Transistor was ' Good ' all along and never needed to be replaced. Not sure if any of this may help? but figure I'd share Thanks, _Arcadius ________________________________ From: Pat Danis <patdanis@verizon.net> To: vectorlist@vectorlist.org Sent: Thursday, April 12, 2012 4:36 PM Subject: VECTOR: V2000 Blooming issue Working on a Asteroids machine with a Wells Gardner V2000 19" monitor.  Deflection board and HV cage have been capped after it was determined that there was a "blooming" issue with the monitor.  That did not fix the issue so the HV diode was pulled from the HV cage and a new Varo 1802? diode put in.  The cups and springs on both sides are in very good condition however the diode wants to push out of the connectors due to the spring resistance.  The plastic supports for the HV line are not enough to keep the diode securely installed in the cups.  I did wipe the "goo" off the ends of the connectors and now think that perhaps I should have left it there as it did provide a sort of "glue" to keep the diode in place.  Despite the looseness of the fit, The diode is securely attached to the springs but I still am getting a blooming issue after about 10 minutes of warmup.  The image expands in both directions.  There appears to be no change in symptoms
 from the original diode.  I tried freeze spray on various components with no change.  If I let the monitor cool down, the image is correct and starts all over again. Any ideas?  Usually it is just the diode or the transistors on the outside of the HV cage.  (Those are good) Pat --------------------------------------------------------------------------- ** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org ** Please direct other questions, comments, or problems to chris_at_westnet.com
---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Thu Apr 12 19:36:16 2012