Archived from groups: rec.games.pinball (More info?)
Hello,
I'm in the middle of restoring a Williams Grand Prix and my biggest
problem right now is that the reset sequence is not completing and the
score motor goes on forever. Hope any of you EM wizards out there can
diagnose these events and maybe tell me where to look.
1. I power on the game
a. Lock Relay fires and stays locked.
b. "Game Over" lights in the backbox
.... Here I'm having some problems with the credit counter (a coin drop
increases the credits, but also chimes a bell and increases the 1000
score wheel), plus, no matter how many credits I have I still can not
start a new game with the start button. More on this in another post...
2. I manually trigger the Coin Relay (which should trigger the reset
sequence)
a. The score motor starts running
b. The "No. 2/3/? Reset" relays in the backbox fires in a pattern with
the two leftmost firering at the same time, alternating with the
rightmost. This resets all the score wheels to 0000000 where they stop.
c. After a second or so, the Game Over Relay Latch is fired, and "Game
Over" is no longer displayed in the back box. Instead the ball number
and player up is lit. Player up is 1.
d. The Target Relay is fired and locks
e. Both Bonus Steppers under the playfield locks the reset coil, and
sporadically fire the step down coil (step to 0 because of the reset
coil locked).
f. The two kickers to the left and right of the playfield fire and kick
e. The target relay is de-energized and the whole sequence from d is
repeated.
I've opened and cleaned the two bonus steppers, and I'm fairly sure that
the two player steppers (backbox and bottom cab) are zeroed. Same with
ball count which displays 1. And all the score reels are zeroed. So it
seems that everything is zeroed, but this is not passed on to the part
supposed to stop all this noise
Is this possible? Also, what has the
Target Relay got to do with anything? Seems like it's firering in every
little sequence I've tried.
Thanks for any help I can get!
Tor Arne
Hello,
I'm in the middle of restoring a Williams Grand Prix and my biggest
problem right now is that the reset sequence is not completing and the
score motor goes on forever. Hope any of you EM wizards out there can
diagnose these events and maybe tell me where to look.
1. I power on the game
a. Lock Relay fires and stays locked.
b. "Game Over" lights in the backbox
.... Here I'm having some problems with the credit counter (a coin drop
increases the credits, but also chimes a bell and increases the 1000
score wheel), plus, no matter how many credits I have I still can not
start a new game with the start button. More on this in another post...
2. I manually trigger the Coin Relay (which should trigger the reset
sequence)
a. The score motor starts running
b. The "No. 2/3/? Reset" relays in the backbox fires in a pattern with
the two leftmost firering at the same time, alternating with the
rightmost. This resets all the score wheels to 0000000 where they stop.
c. After a second or so, the Game Over Relay Latch is fired, and "Game
Over" is no longer displayed in the back box. Instead the ball number
and player up is lit. Player up is 1.
d. The Target Relay is fired and locks
e. Both Bonus Steppers under the playfield locks the reset coil, and
sporadically fire the step down coil (step to 0 because of the reset
coil locked).
f. The two kickers to the left and right of the playfield fire and kick
e. The target relay is de-energized and the whole sequence from d is
repeated.
I've opened and cleaned the two bonus steppers, and I'm fairly sure that
the two player steppers (backbox and bottom cab) are zeroed. Same with
ball count which displays 1. And all the score reels are zeroed. So it
seems that everything is zeroed, but this is not passed on to the part
supposed to stop all this noise
Is this possible? Also, what has the Target Relay got to do with anything? Seems like it's firering in every
little sequence I've tried.
Thanks for any help I can get!
Tor Arne
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