Tron - 1982 Bally Midway

I picked up this game on October 4th, 2008 in Portland, OR. The game is in pretty good shape and has been mostly restored. Coin Counter is at 37,737. No serial # tag. This is game #5 in my collection.

Repair Log:

7/18/2009 replaced onboard Nicad battery with a lithium coin cell, replaced resistor at R217 with a diode to prevent charging the lithium battery.

11/29/2009 MCR board rebuilt (preventive maintenance).

1/1/2010 Freeplay eprom chip installed at location D2 and dipswitch SW1-4 set to 'on'.

8/6/2011 Installed an equivalent of the Dallas 1220 chip (battery backed sram) at B2 to save high scores and removed the lithium ion battery on the PS board since it would wear out after only a few weeks. Now Tron saves high scores again! :)

6/19/2012 Game started resetting to the grid test screen. Checked the 5V line and it was ~4.9. Rebuilt the MCR power 'suitcase' with new caps (56,000uf, 100,000uf), new 12A diodes x4, new 6A and 10A fuses. Game works great and high scores once again are saved. Problem was determined to be low 5V line and caused the NVRAM chip to 'lock' out saving causing 'ram error @b2'. Removed the hacked in 'switcher' which was apparently installed to add more juice to the 5V line which was failing due to bad filter caps.

6/30/2012 Replaced the oil capacitor in the bottom of the cab 3.5uf 440 volt, old one seemed to work fine, but replaced as preventive maintenance.

6/30/2012 Capped the 3 game boards. 470uf 16v replaced with 470uf 25v 4ea. on the top 2 boards (8 total). 100uf 25v replaced with 100uf 25v 2 of these caps on the 3rd pcb.

SEE SUITCASE POWER SUPPLY REBUILD PAGE

Tron Freeplay Link

Here's the front view, the background graphics and lights look good and working.

Side art is in good shape, looks to be reproduction installed at some point.

Here's the original ni-cad battery still installed on the power supply PCB. Definitely some corrosion going on, but doesn't look to have spread much yet.

I replaced the ni-cad battery with a coin cell lithium battery to prevent future corrosion. Note R217 is a diode now to prevent charging the lithium battery.

37,757 plays on this machine when I picked it up.

Here's the monitor. Not sure what type it is, maybe a WG 49xx??

Here's the main game PCB showing the eproms. Note the 6/17 date on the chips. I'll need this to order a free play eprom to put at D2.

Overall inside the cab looks typical. Some dust and lots of wires.

This is interesting. Somebody has added a switcher in to power the +5V on the game PCB and jumpered it directly to a capacitor. The rest of the power is still coming out of the original MCR board.