(Topic ID: 252266)

GTB Target Alpha: goes to 4 players auto,matically


By Alan_L

4 months ago



Topic Stats

  • 12 posts
  • 4 Pinsiders participating
  • Latest reply 33 days ago by Alan_L
  • Topic is favorited by 2 Pinsiders

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#1 4 months ago

My friend has a Target Alpha that is set for Free Play and with one press of the Start button, the game automatically sets up for four players. I'm sure that this is probably a simple adjustment, but being more of a solid state guy, I'm not sure where. Also, after the last ball is played on player four, the game doesn't want to finish: the score motor keeps spinning and won't go into game over. I have the schematic.

TIA

Al

#2 4 months ago
Quoted from Alan_L:

I'm sure that this is probably a simple adjustment

Usually true but finding out where that adjustment is can take some diagnosing.

Quoted from Alan_L:

with one press of the Start button, the game automatically sets up for four players

What are the Coin unit and Start relay doing when this happens?

Quoted from Alan_L:

the score motor keeps spinning and won't go into game ove

The score motor is between 19E and 20E on the schematic, and there are 9 switches to the right of there that make the motor run. Which one(s) are closed when this happens?

#3 4 months ago

Game over problem likely AX and/or BX. They're tricky to get right. Check the make/breaks sw. on them.

#4 4 months ago

I would first check the player count stepper unit. These are notorious for getting gummed up and sticking.

This is located at the front right of the main relay board, just behind where the coin box would sit.

You may need to dismount it from the main relay board to get clear access to it.

This is one of the very first things I service in this era of Gottlieb 4 player games.

4 weeks later
#5 3 months ago

Just getting back to this thing after vacation, family issues, etc.

Turns out you got that right.

Nothing at all.

I see the 8 switches on the schematic but I can't find them on the machine, and I don't know what the letters (C, D, G, O, P, S, W, MOTOR 1C) stand for.
My score motor looks different from the diagram on the schematic, see pics.
I must be looking at it wrong.

I checked the AX, BX, DX, and Q (Game Over) relays: all are adjusted properly. The Q relay locks on at power up and does not release when the AX relay is manually activated.

If you mean the Coin Unit, I unscrewed it and cleaned the contacts, but it looks just like the pics on Clay's website. It never moves or does anything.
At power up the score reel lights for Players one and four come on.

Simple adjustment, yeah right.

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#6 3 months ago

If you'd like to try a phone call, send me your cellphone number in a private message and I'll make a first reply with a text message.

#7 3 months ago

Try checking the O relay for the game over problem. and it's the Coin Unit that controls the player lites.

3 weeks later
#8 3 months ago

Hey Alan,
In case you haven't gotten your Gottlieb interlock relay working, markg was kind enough to loan me one. So I could offer some advice in another phone call.
- Howard

#9 3 months ago

Hi Howard,

I did just make a major breakthrough this afternoon, I got it working...kinda..sort of...mostly.

Before when I it the Start button, the score reels would reset then Player One started racking up points on the 1,000 point reel and wouldn't stop until I turned it off. I looked for a stuck switch without luck for quite some time until I found two switch lugs touching each other on the 5-bank drop target housing. Pulled them apart and that problem was fixed. It now starts and plays a game, all switches, lamps and chimes work.

The machine still is confused though. At power up, only the score reel lights for players 1 and 4 light up, 2 and 3 do not. I believe all four players' reel lights should be on. When you start a game, player 4's reel lights go out and player 1's stay on as they should. You can press the start button 3 more times to light all four players. But when you drain player 1, ball 1, the machine does not advance to ball 2 (if playing a single player), or player 2 (if playing multiple players), much less players 3 and 4.

I think that I have the switches on the AX, BX, DX, and Q relays adjusted properly. I think. Both of the large switches on the coin unit are closed for one player operation.

BTW, I wanted to thank you for explaining the diagram for the Score Motor switches to me.

I'll try and explain it to anyone else who doesn't understand it. (Lord, I hope I'm not the only one)

The switch numbers in the diagram in post #5 above do not refer to the actual switches themselves, but to the HOLES in the metal bracket below the rotating disc. Notice a double line on each end of the switch number hole in the diagram. That is where the white spacers are at the ends of each switch bank, opposite the end where the bakelite spacers and screws are. For example, switch #4 is the one with two switch stacks just to the right or the large hole in my pic of the rotating disc. Switch #1 is the double stack at the bottom left corner of my pic, perpendicular to switch #4. Switch #2 is parallel to #4 and switch 3 is right next to the small hole in my pic.

2 weeks later
#10 71 days ago

Would someone tell me what is the correct position for the rotating finger on this GTB Target Alpha Player Unit?
I am looking for the position with the game on, and the Start button pressed once for a one player game.
Now I think that the previous owner may have taken this unit apart and not put it back together properly, and maybe even the coin unit as well.

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#11 71 days ago

One player game, fired up.

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1 month later
#12 33 days ago

The upshot:

Finally got his TA fixed, running and sold. It had a variety of problems, the Player Unit (above) was improperly disassembled and reassembled by a previous owner, an obscure single Jones plug was misplaced and there was a broken wire on the 3-5 ball adjustment so the game didn't know whether it was a 3-ball or a 5-ball game, so it just stayed with ball 1, over and over.

Thanks to all who offered advice and pics.

Alan

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