Tempest monitor not working

Dave P 2

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Okay I recently acquired a Tempest upright Video game and upon start up there are a few beeps and sounds. Never having played Tempest I didn't know if it was the correct sounds or not. But I assumed it was and figured the game was playing blind. So I got a Bob Roberts wg6100 deluxe cap kit and upgrade parts as well as a "big blue capacitor" for the game. Everything went well regarding replacing the components and re-flowing all of the connector pins. However I have the monitor back in and the spot killer is on and obviously no picture.

First, the r920 resistor looks baked (that was not a part of the kit)I need to know what resistor to replace it with. Where can I find that out?

Secondly I read that I should check for .5v to -.5v at the yellow and orange wires going to the monitor.With my DMM Do i connect to ground and test yellow then orange? OR do i go to yellow and orange and check?

Third I am supposed to be getting 180v on p900 connector 5. I am getting 245v and 0volts on p900 8.

If that isn't the enire problem with the monitor I assume its a good start. Any help would be greatly appreciated. I am a "newbie" to any kind of monitor repair but I have a decent knowledge of how to use a meter and how to solder but I don't know a whole lot about electronic components.
 
First.

Rebuild your ARII-rev2

Next.

Make sure your transformer (base of cab with big blue) fuse holders are nice and tight. Replace if needed.

After that.

The problem with vector games is unless you know your pcb is working 100% then you'll never know if your monitor is working.

Without a proper signal from your tempest board the spot killer circuit will always turn on. So fix the resistor (manual is your friend, so are schematics) and make sure every single wire that goes to each frame mounted tranny is ok. As these wires have had a lot of heat and age, I'd bet you'll find one or two that's hanging by a thread or will just pull off in your hand. Reflow lots of solder pads on the neck, HV, and LV pcbs on the monitor.

Once your happy with the monitor, check the interconnect cables on the pcb. Test continuity on each pin. Or replace them.. I've tested a few old ones and they are usually ok, but can fail. Reflow the solder at the header pins they connect to on each pcb.

Ok, your almost there..

Check your dipswitch settings on both pcbs.. Make sure they are set correctly (manual)

Ok, it's finally time to fire up the game. Try using the test mode switch inside the coin door with game off.. Hit switch, turn on.

Good luck.
 
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