norbert
New member
Hi all, nice to meet you. First post and i'm after some help/info, so please go easy on me!
I recently aquired a Midway Bally upright which powered up, but did not work. A quick adjustment to the pots +5v/-5v/+12v got some voltages to the appropriate places and the machine is running ok'ish. So two questions!
1. There is a loud annoying hum coming from the speaker. Game sounds are ok, apart from a sort of squeeling noise when the fire button is pushed?
2. On the start up screen, it states that the game is Super Invaders Zenitone Microsec Ltd (level 2 onwards, some invaders split in two).
The motherboard is labelled M051-00739-A008 and Midway MFG is imprinted on the board.
The daughter board which plugs into the main board in an L shape) has Midway MFG imprinted on it and A080-90700-C739.
I cannot find hardly any info on this, anybody out there any ideas??
Many thanks in advance.
Norbert Colon.
I recently aquired a Midway Bally upright which powered up, but did not work. A quick adjustment to the pots +5v/-5v/+12v got some voltages to the appropriate places and the machine is running ok'ish. So two questions!
1. There is a loud annoying hum coming from the speaker. Game sounds are ok, apart from a sort of squeeling noise when the fire button is pushed?
2. On the start up screen, it states that the game is Super Invaders Zenitone Microsec Ltd (level 2 onwards, some invaders split in two).
The motherboard is labelled M051-00739-A008 and Midway MFG is imprinted on the board.
The daughter board which plugs into the main board in an L shape) has Midway MFG imprinted on it and A080-90700-C739.
I cannot find hardly any info on this, anybody out there any ideas??
Many thanks in advance.
Norbert Colon.