19" Alva Chassis help?

SilverDuck

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I have the 19" low ohm Alva chassis, and I'll be damned if I can get it to sync.

There is a single pin up near the degause connector that is labled "FG". What is this?

The single pin on the neck board....where does this connect to?


The game is a Sega Super-Hang-On upright, and the monitor it had was a W/G 19K7901.

The game's sync wires are white, and blue/white stripe.
The chassis sync is white only, with a black labled E. Is this "Earth Ground"

The chassis came with a black cable, single female pin connector, with a spring and some braided conductor on the other end, and a spring. What is this?
 
The game's sync wires are white, and blue/white stripe.
The chassis sync is white only

I couldn't find the Super Hang-On book, but the Hang-On book shows that the Blue/White wire is the negative sync, so hook that one to the white wire on the chassis connector.


a black labled E. Is this "Earth Ground"

Monitor ground. Ground wire from the original video input connector.

The chassis came with a black cable, single female pin connector, with a spring and some braided conductor on the other end, and a spring. What is this?

That is a DAG spring and wire in case your tube doesn't have one...
 
Thanks. Other than a loose neckboard, the monitor works great. Very very minor degauss issue, but a few power cycles seems to have cured that. This tv/tube swap seems to have worked out pretty well.

Thanks Mod.
 
Are loose neckboards common with the wei ya chassis from Alva? My neckboard will not go all the way in, I can see the pins still. I can get the neckboard to stay on but if I barely touch the neckboard it will wiggle loose. I'm having sync issues with my missile command, I wasn't sure if I should hook both my sync wires from pcb harness to the single white sync wire coming from the chassis.
 
I had two chassis' show up from Alva to be used on identical tubes. One fit perfectly. The other would back off the pins slightly. You'd push it on and it would slide back off a little, like there was a spring or something there. I ended up taking the plastic pin guide off the tube and the neckboard went on just fine then, and stayed that way....
 
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