PJ wrote:
> On 5/10/2011 10:51 PM, John Robertson wrote:
>> Hi PJ,
>>
>> You can use a filament isolation transformer to test our
>> cathode/heater short hypothesis...just make sure neither side of the
>> heater is connected to the chassis/ground.
>>
>> John :-#)#
>>
>
> I'll give this a try since I have such a transformer handy. I was
> thinking of this, but what kept me on the track of other hypotheses
> was that it came up with the screen, and the raster was about 30%
> larger than it should be, kind of like a G05 with a bad HV diode, like
> low HV. The warm ferrite core also sets me off.
>
> If it is such a short, I could isolate the filament supply on the HV
> board from the board's ground?
>
> The horrific brightness of screen has me somewhat gun-shy.
I don't have the schematic handy, you will have to see where the
filament connects to the tube. If you are the PJ I know in Richmond, you
are welcome to borrow my picture tube tester and check for the short...
John :-#)#
--
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
www.flippers.com
"Old pinballers never die, they just flip out"
---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Wed May 11 11:35:02 2011
This archive was generated by hypermail 2.1.8 : Wed May 11 2011 - 12:50:02 EDT