Arcade Collecting > Restorations & repair
Galaga upright restoration
kayoteq:
It lives again! greg at gls1 had a bit of a challenge, then a snafu with the post office, but if finally showed up.
I still have a loose red signal wire somewhere that a precision whack to the side will fix,
but about to the point of reproducing the missing back door, locking the coin box and declaring it functional, if not Midway Minty.
Not bad for something entirely assembled, funded and tweaked with someone else's trash, and forum user's cash.. ;D
Gotta save up for that high score kit, though. No need to burn in my game monitor when I'm not playing..
Suggestions welcomed on how best to conserve things.. I guess other than turning it off ::)
over 100k 2nd game, still have a sticky leaf switch I have to fight sometimes..
but nice to have something original and working for a change.
WunderCade:
So, no cosmetic restoration, just sort of a "get it functioning" restoration?
SirPeale:
--- Quote from: WunderCade on August 28, 2008, 02:22:13 pm ---So, no cosmetic restoration, just sort of a "get it functioning" restoration?
--- End quote ---
Give the guy time! I don't blame him for getting it functional first.
Mauzy:
--- Quote from: kayoteq on August 28, 2008, 02:09:11 pm ---It lives again! greg at gls1 had a bit of a challenge, then a snafu with the post office, but if finally showed up.
I still have a loose red signal wire somewhere that a precision whack to the side will fix,
but about to the point of reproducing the missing back door, locking the coin box and declaring it functional, if not Midway Minty.
Not bad for something entirely assembled, funded and tweaked with someone else's trash, and forum user's cash.. ;D
Gotta save up for that high score kit, though. No need to burn in my game monitor when I'm not playing..
Suggestions welcomed on how best to conserve things.. I guess other than turning it off ::)
over 100k 2nd game, still have a sticky leaf switch I have to fight sometimes..
but nice to have something original and working for a change.
--- End quote ---
Did he let you know what was wrong with it? He sent updates every couple days when I had him fix one of my Pac Boards
kayoteq:
Heh, well, it's really in fair to good shape, and I have a few with actual structural work that needs to be done before a makeover on this one. Plus, it's all still all a learning process, digging through the forum archives, asking confusing questions.. :P
the cabinet is a bit um..loose, about a 1/8 gap between the control panel sides, so it wouldn't hurt to get that a bit tighter. I am committing to doing the control panel overlay, which gives me back that nice and new look.
I would be more willing to strip and replace the artwork if the stuff was in bad shape.. or true reproductions.. that 'NOS' cpo kinda burnt me on that. I also have spare glass bezels, one of which is in better shape, but saving that for when I'm done pulling parts in/out.
So yeah, at this point I'm kinda using my budget on electronics before artwork. I have a spare complete Galaga power supply/harness, and may go for restoring that to working order and get rid of the modern switching supply, so I consider that a 'restoration' as well.. :)
I have access to a complete workshop to fabricate anything I need cabinet-wise. And I do, at times. But my house is on a hill, and one really needs a well ventilated area for a good stripping/sanding/painting process. No garage,or even a paved driveway for that matter.
I know there's some who are 'restore the cabinet, then fix the game'. My specialty is electronics, so I tend to lean towards game first.
I would like to figure out how to restore that marquee.. the white areas have thinned out somewhat, but I'll practice on a broken marquee I have first. Tricky, that..
As far as the repair.. sorry, I thought I had posted the epic before. The wrong z-80 was from when I was trying my varied spares
to get things going, since my logic probing showed a stop around 1/2 way through the test cycle. Gotta know when you're beat,
though, and refer servicing to qualified service personnel.
Here's what I found on your Galaga board set:
Stops at RAM OK
There were two reasons for this:
1) The Z-80 chip at location 4E was not a Z-80 CPU chip, it was a Z-80 PIO
chip - replaced with correct part.
2) The Custom Namco "06" chip at location 2L was blazing hot - chip was no
good - replaced with known good part.
Now, board almost completes boot-up, but gets to grid pattern and stops,
then resets, and does this process over and over again.
This problem caused by a failed Custom Namco chip "51" at location 4H.
Replaced 51 chip and board boots up all the way.
Next problem:
Board boots up, and coins up - start a game, and it goes for about 20-30
seconds, and freezes, then resets.
While examining the main program, testing device finds intermittent
failure while reading program chip 3M. Replaced all 4 main program chips
with last revision Galaga code. (3K, 3L, 3M and 3N)
Now the board plays without resetting - but the sound / music is not
exactly right - some tones are missing/distorted - this problem caused by
failed sound prom at location 1D - replaced, and the music is correct
again.
Board is ready to run for the 3-day burn-in.
Left running on a Friday, Came into shop on Monday, and the video has
lines in it - this problem caused by failing Custom Namco chip "02" at
location 4H on video board - replaced - video is good again.
Board is ready to run for the 3-day burn-in, for try #2
Board set runs fine for about 2 days, and starts resetting at random -
found a failed 74LS367 chip at location 1M - replaced, board runs fine
again.
Board is ready to run for the 3-day burn-in, for try #3
This time, the board runs for 3 days, and all is still OK.
As he put it, "sometimes it's a simple fix, sometimes not". That, and he's got about 10 more in the shop. Busy guy.
And I have a few to fix to working status before I start over again, going over the detailis and cleaning up/fixing cosmetics.
The Gravitar just needs a back door and fixing the back corner base that's kinda shredded/rotted.. um, besides fixing the vector chassis.
The Asteroids Deluxe- well, let's just say it's been converted into jamma oblivion as well as the panels glued over the original art.
The Centipede.. well, that's the first one I got and that's been an effort to get to something resembling original.
And that doesn't include the cocktail that needs custom controll panels due to a Trivia Whiz conversion. Not easy fitting controls
to Galaxian panels with 5 extra holes.. But that's all reversible once I end up with the proper parts.
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