Re: Building SWCP Amplifone monitor - need some help debugging issue!

Everyone, thanks for your suggestions and help.  The problem is now fixed!  :-) 

To answer Andrew's question...no, I was not getting neck glow, which was really puzzling considering all of the things I had checked.

The issue was that in my initial tube connector disassembly I didn't get one of the heater pins all of the way back into the tube connector, so it was not making proper contact.  Tonight I re-opened the connector, pushed the heater pin all of the way in, reassembled the tube connector and everything lit up again!  This Star Wars cockpit is alive again after who knows how many years of being converted into a Great 1000 Mile Rally.  Now, I "just" need to figure out how to get my newly assembled 25" "Amplifone" monitor converged and adjusted properly.   But maybe I'll play a few games first....  :-)

Thanks everyone!

Scott

--- On Sun, 1/9/11, Andrew Welburn <andy@andysarcade.net> wrote:

From: Andrew Welburn <andy@andysarcade.net>
Subject: Re: VECTOR: Building SWCP Amplifone monitor - need some help debugging issue!
To: vectorlist@vectorlist.org
Date: Sunday, January 9, 2011, 3:52 PM

Andrew Welburn
http://www.andys-arcade.com ----- Original Message ----- From: Scott McGovern To: vectorlist_at_vectorlist.org Sent: Friday, January 07, 2011 1:21 PM Subject: Re: VECTOR: Building SWCP Amplifone monitor - need some help debugging issue!

Thanks for the reply.  Can you be more specific?  I would think that a problem in the game pcb would result in the spot killer being on.  I guess I could have two issues...a game board problem and a problem with the spot killer on the deflection board....perhaps my judgment is colored by the fact that the game pcb was pulled working from the same upright that my working Amp HV pcb came from.  I will try scoping the game pcb to make sure the game pcb is still working.  Also, though I didn't mention it, I did install a cinelabs HV flyback when I rebuilt the HV pcb 18 mos ago.

Thanks,
Scott

--- On Fri, 1/7/11, EDWARD LUTZ <edward.lutz@insightbb.com> wrote:

From: EDWARD LUTZ <edward.lutz@insightbb.com>
Subject: Re: VECTOR: Building SWCP Amplifone monitor - need some help debugging issue!
To: vectorlist@vectorlist.org
Date: Friday, January 7, 2011, 7:44 AM

----- Original Message -----
From: Scott McGovern <m_mcgover@yahoo.com>
Date: Thursday, January 6, 2011 22:59
Subject: VECTOR: Building SWCP Amplifone monitor - need some help debugging issue!
To: vectorlist@vectorlist.org

> I am restoring a Star Wars cockpit and I am at the stage where I
> am building the monitor, but I am running into a problem. 
> I have nothing at all on the screen.  Here is what I
> know/done so far...
>
> 1) The game plays blind, so the boardset is good.
> 2) I had the monitor working very briefly when it was out of the
> cabinet.  When it was working, red and blue were not as
> bright as green
> 3) Once the monitor got put into the cabinet, I never really had
> it working again.
> 4) Deflection board - unknown, but behaves properly.  Spot
> killer comes on briefly, then goes out.  I hear deflection
> chatter.5) HV PCB was rebuilt and should be good...at least it
> was good when last tested in a SW upright I no longer
> have...since this issue started:
>    a) I've re-soldered the focus and intensity wires
>    b) I get ~19.5kV measuring anode with a HV probe
>    c) I get ~180V measuring B+ on the one leg of CR3,
> the HV diode on the HV PCB next to the flyback
>    d) I took the tube connector apart and tightened up
> the pins with needle-nose pliers.  I also measured
> resistance of all wires from tube connector to other end, all
> were < 0.4 ohms
>    e) I measure ~ 2.5ohms across pins 9 and 10 of the
> tube connector, so the tube heater element should be good.
> 6) The monitor is built from a 25" 100 degree tube, WG6100
> yoke.  I had to extend the yoke wires, the DAG ground, and
> the degauss wires.  I made sure the DAG ground is connected
> to both pins into the harness.
>
> I do not see any neck glow.  This seems to be the big clue,
> but I cannot figure out why? 
>
> I assume yoke and convergence magnet position would have no
> impact on my problem.
>
> Please help!  I assumed that trying to converge the tube
> was going to be the biggest problem...
>
> Thanks,
> Scott
>
>
>
>      
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Received on Sun Jan 9 21:01:32 2011