Atari Repair
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1 Introduction
Put system info here
2 Games
Put list of games that used this system here (including anything that might not have been pinball)
3 Technical Info
Superman coils (all are 50 volts DC):
Atari # A007030-01 is used for the pop bumpers, slingshots, outhole, eject hole, and drop target reset. Approximate dc resistance is 6 ohms and it has a 1N4001 diode soldered across the terminals. Coil has 1/4" quick connect terminals (no soldering needed). The coil sleeve is Atari # 006791-01. I believe Bally # AN-26-1200 will work for a substitute.
Atari # A020470-01 (25/790) is the flipper coil. Has two diodes installed. The high current pull-in winding is 4.5 ohms dc resistance. The total resistance of the pull-in and hold windings is approximately 150 ohms. Coil has 1/4" quick connect terminals so no soldering is needed. Uses Atari coil sleeve # 006791-01.
4 Problems and Fixes
4.1 Power Driver Issues
Pertains to Atari "Superman" pinball:
All playfield coils except for the flippers do not work. Chip B4/5 (CD4013) is the solenoid enable select. Replacing it restored all playfield coils to normal operation.
Solenoid driver transistors are type 2N6041.
Lamp driver transistors are type MPS-A06.
4.2 MPU Issues
Pertains to Atari "Superman" pinball.
Switch matrix problems: many switches not recognized or operating one switch triggers several other switchs. Replace chips H7 (74LS244), E6 (7407), and D6 (7407).
Battery holder corrosion: There is a 3 AA battery holder made of aluminum that will corrode over time causing loss of battery backed data like replay scores and bookkeeping. Drill out the four rivets and unsolder the two terminals to remove the old battery holder. A new, seperate 3 AA battery holder with wire leads can be mounted near the board. The wire leads will solder directly to the + and - terminals on the MPU board. No blocking diode needed as Atari's system relies on ordinary alkaline AA batteries.
4.3 Power Supply Issues
Pertains to Atari "Superman" pinball:
Fuses:
F1 Machine main power fuse, 5 amp slow blow, located on metal box on bottom of cabinet. F2 Service Outlet fuse, 2 amp slow blow, located on metal box on bottom of cabinet. F3 To BR1 & C1 (50 volts dc to coils), 15 amp slow blow, located in backbox. F4 To BR2 (+7 volts circuit), 15 amp slow blow, located in backbox. F5 To BR3 & C2 (+12 volts circuit), 7 amp slow blow, located in backbox. F6 For 6 volts AC general illumination circuit, 15 amp slow blow, located in backbox. Note: some machines may be incorrectly labeled as a 10 amp slow blow fuse. Fuseholder may tend to burn up. F7 Center tap of 6 volt circuit, 1 amp slow blow, located in backbox.
All three bridge rectifiers are type MDA3501.
4.4 Display Driver Board
Possibly doesn't apply to some, can't think of an example.
5 Repair Logs
Did you do a repair? Log it here as a possible solution for others.