| Arcade Collecting > Restorations & repair |
| Next two machines on the repair block!! |
| (1/7) > >> |
| Slippyblade:
So, I've got a deal with this guy. He's got a bunch of games and they all need some sort of work done. If I can get them working, I get a Joust out of the deal. I finally brought the first two machines home and got to poke at them today. The machines I'll be working on. Mr Do Defender Pac-Man Joust Tutankhamen Kangaroo Dig-Dug I brought home the Tut and Joust today. Joust: When plugged in and turned on, the CRT turns on, screen brightens up, but there is no image or sound. Gonna break out the meter and start testing voltages. Tut: Nothing at all happens when turned on. ----------------------------------------------------------- 7/21/17 ---------------------------- Next two machines are in the house. This time I grabbed Pac Man and Stargate. Got them home and into the shop and plugged them in. Holy ---steaming pile of meadow muffin---, they both power up! Stargate: Powered on, displays a RAM error message but then boots up and is playable. Pac Man: Powers on, screen has an all over red hue, totally playable. |
| thomas_surles:
Sounds like a sweet deal. I love joust. I will be watching this. |
| Slippyblade:
I won't be doing full restorations on these machines. Just getting them working. It's as much a learning experience for me as anything. I've not done machine repair like this before, so everything I do will be new ground! First, the Joust. First thing I did was open the cabinet and firmly seat all the ROMs. Nothing. Then I found a board reset switch, tried it and it booted! Played a game just to check and it was working fine. Cycled through all the test and bookkeeping menus and it looked fine. No sound though, so I went to close the back door... and it died. So there is obviously something wrong... now to find it. There is a 7-segment on the board that was showing '0' when it was playing, now it's not lit at all. Monitor is still lit up though, so there is juice in the system. |
| Slippyblade:
Behavior is very intermittent. All three LED's on the power board are lit, so at least it *thinks* the voltages are correct. I think I just need to pull the whole boardset out onto the bench and start probing voltages. Probably going to reflow the solder joints on all the board connector pins as well since I've read those like to go south. |
| opt2not:
Williams board-sets are really temperamental with voltages. Definitely verify the power supply's voltages and check to see if there are any spikes happening. Is it on the original linear PS? They are pretty straight-forward for repairing and probably due for new caps. Or, you could swap it out with a switching PS. Though I am still running my repaired linear and it's been holding strong for a while now. Also, the ribbon cables between the ROM board and the Mainboard are prone to bad connections. I have had 2 boards that I had to replace the ribbon cables with IDE conversion kits from Scucci at KLOV. They help with making the boards more bulletproof, and being able to easily replace the ribbon cable in the future is pretty handy. |
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