Tempest Voltages?

Danimal219

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What Voltages does this game like or should I say run good at.
I already adjusted the +5 on the AR2 to set it at 5.05

What are the voltages you guys have @ the board? The reason I ask is I'm getting a high range on the -15 rail on the game board

I'm working on my tempest and trying to get it up and running.
I rebuilt the AR2, I Installed 6 new chassis Resistors but only a couple were bad. I also replaced Q101 & Q102 diodes Which I noticed were fried when I opened the back door and looked on the deflection board. Then On the PS I replaced the big blue cap and installed 6 new fuses including the deflection board fuses P600 P700 I believe. I did all the caps on the def/board n neck/board too. I also reflowed all the pin connectors. I Tested the power supply and ar2 on Rig and both are good.

I'm going to rebuild the high voltage area now.
what voltage do you guys get on your working tempest boards on the -15 game board test loop?
I double checked my chassis trans. too! I made sure they weren't grounded to the chassis and all of them are good!
I'm getting beeps now and garbled sound. I also have a small dot on the screen when I turn up the monitor brightness on the fly.

Any help is appreciated
 
Sounds like you have bigger issues with your game PCB, but it's hard to tell without more info.

I replace the regulators if any of the voltages are more than +/- 0.3V off of what they should be (+15, -15, +5 DAC, etc). You can probably get away with +/-0.5V (meaning it will run), but I go a little tighter, as if it's outside that range, the regulator is likely on its way out.

First step after voltages is to check your ROMs, and clean the sockets, as this is the #1 issue with these boards. I replace all of the sockets by default on all of the boards that I repair and refurbish.

Three things you absolutely want to get if you are going to work on these boards are a can of DeOxit, a logic probe, and a fiberglass brush.

http://www.ebay.com/itm/331541650749

http://www.ebay.com/itm/361390969503

http://www.ebay.com/itm/201067762269
 
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