Introduction

Got an email asking if I would repair a Midway Pac-man arcade. The owner stated the game was dead and just wanted it working even if the “guts” are replaced with something different. My initial thought was to make it a 60-in-1 similar to the Ms. Pac-man that I recently completed. When I arrived at the owner’s house, I was expecting to see an upright cabinet, but instead saw the cocktail version. The game key did not work, which told me the owner never opened it. I was able to get the game open and right away noticed that there was no monitor chassis. At that point, I decided to load up the game and take it to my shop.

Repair

I went ahead and found a rebuilt G07 chassis for sale, which I bought. In the meantime, I started going through the game. All the fuses were good, and the game was playing blind. I put in my test monitor and noticed the game was not syncing correctly. I moved the PCB to my test bench and noticed the same problem on a different monitor. Looking at the schematics, I traced the composite sync back to chip 5N (74LS08) and two signals going into the chip were pulsing, however the output was stuck low. I replaced the chip and the game was now working correctly. I tested sounds and controls while the PCB was on the bench.

Once the G07 chassis came in the mail, I installed it thinking I was going to be done with the game, but noticed the colors looked horrible. I plugged in my TPG and showed much better colors. The pins on the video and sync cables needed replaced. Doing this brought a much improved picture. I replaced a few light bulbs and cleaned out the inside of the game to complete the repair.

Conclusion

The owner acquired this game from a restaurant that went out of business. Putting on my detective hat, I imagine the previous owner thought the monitor had problems when in fact the PCB need the repair. They took the chassis out to get repaired and maybe never found the problem or gave up on the game. I was glad to repair this Pac-man arcade back to its original self, and the owner decided not to put a multicade in it. He really just wanted the game working. Amazing how well the game looks after 40 years!

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