Elektra
Bally, 1981You're currently viewing posts by Pinsider quench.
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Stupid question, but are you pushing switch S33 (top right corner of the MPU) during test mode (i.e. during lamp/display/solenoid/sound/switch test mode)? It's not shorted by any chance?
If you do, the game will go into lala land and hang during test mode unless you've got an AID module connected.
S33 should only be pressed once you get to the audits.
Quoted from Zambo:TP2 is 14.7v instead of 11.9v could this be important?
It does partly supply voltage to the 5101 when powered.
1. What voltage are you measuring on pin 22 of the 5101?
It almost sounds like you've got bit rot in the ROM at U6, but in that case it should fail the ROM test on power-up.
2. If you manually reset the CPU while the game is on (quickly short pin 39 and pin 40 on the CPU), does it always successfully pass the 7 LED flashes?
3. When you did manage to get through the 5th press of the self test button, did it report any stuck switches?
4. Disregarding the service mode issues, is the game actually playable?
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O'fallon, MO