Recent content by Thom

The new lamp holder for the coin return light arrived here today - all the lights on the machine are working properly now. But yet another new problem - I purchased a new grounded cord from www.therealbobroberts.net (I found one properly grounded outlet in the room that my Asteroids machine is...

That looks perfect - thanks! Thom

My audio problem was simply a bad speaker. I wired a temporary speaker in for now; 'audio works fine, the volume control works fine. Now I'll start on restoring it. Overall, it's in pretty good shape. I've ordered some stuff from www.arcadeshop.com; I'm waiting to hear back from him now. Can...

Ok, I hooked some powered speakers up to J7-8 (Audio 2) and J7-9 (Audio 1) - I just inserted jumper wires in the back of the plug, and had alligator clips on the other end to connect it to the speakers. I did get all sounds this way. There was also quite a bit of hum in the speakers... Then I...

I cleaned the contacts on the large connector for the game board, and found a couple of the pins inside the connector that didn't look like they'd make good contact (I bent them out slightly). I just played a game for about 15 minutes - I had no video problems at all. I still have no audio...

Thanks Dokert. Is it something that I can possibly troubleshoot/fix myself, or is it something that someone who knows what they're doing should do? If that's the case, can you recommend someone? Thom

Thanks KorbenD; I ordered some "CAIG DeoxIT FaderLube". 'Turns out that I am still having the video problem - I don't know if maybe it was a coincidence that it worked properly for a while after I adjusted the brightness and the contrast this morning? Or maybe it's just that it had been...

I may have figured out the cause of the video problem I was having - I think that my Brightness and/or Contrast pots might just be dirty. I adjusted them some more; it appears to have fixed the problem (at least for now...). I'll pick up some Contact Cleaner on my next trip to Radio Shack, to...

Thanks modessitt - you were exactly right; I must have missed one fuse (on the power brick) when I checked them. A quick trip to Radio Shack for the right fuse, and I was up and running again. I disconnected (and insulated) the two coin lamp holder leads for now, just in case. But - yet another...

Ok, I knew that went too smoothly... 'New problem - I put the lamp back into the coin return. When I turned the power on, I got a bit of a spark from the terminals on the bottom of the lamp's socket. Now I have no monitor. I still have the red LED on the main board, the 1 & 2 Players lights are...

The wires on the volume pot and the speaker appear to be attached. Actually, I don't know how to "see" where the wires are attached at the back of the speaker (the speaker appears to be stapled in), but reaching up through the hole beside the speaker, I do feel that the wires are attached...

One other thing I forgot to mention - I adjusted R8; 5.5 was the lowest that pot would take the voltage at the +5v test point. Thom

Dokert, you are a genius! I'm up and running now; great picture, coin returns work, buttons all work great, etc. 'Just one problem now - no audio. I know where the volume control is (inside the coin door); I turned it all the way counter-clockwise; still no sound at all... Thom

I changed the 2N3055 transistor. I now have the following voltages on the A/R board: At the +10.3v test point: 11.93v At the +5v test point: 6.06v When I turned the power on, I now have a red LED light up on the main board (I believe that it says it's "CR5"). A red LED flashes on for a second...

Ooops - thanks so much for your patience. I've taken some pics of the proper board now: http://www.thewhistleshop.com/misc/asteroids/asteroids.html According to their website, my local Radio Shack has this transistor in stock. I'm going to run out and pick one up now... Thom