Arcade Collecting > Restorations & repair
I don't believe it, another classic added => Centipede ! FINISHED !!!!
polaris:
im reading
Level42:
Thanks Polaris :)
This Centipede is a tougher nut to crack than I'd thought.....eveytime I fix something, there's some other problem..... ::)
Picked up the Philips monitor yesterday, and it still has a great picture. Loosely hooked it up to the Centipede just now, works... :) [EDIT, well not completely yet, there' some weird thing with the colors, but I think I need to hook up the +12V and +5V lines, just like on the Galaxian TV-set).
So I tried to play my first game, but the trackball is only moving the archer up and right....oh well, no time to figure that one out tonight....must be the direction not working....
Bob just mailed me that he actualy cross-shipped the parts. GREAT ! And that on a first, international order :cheers: :cheers:
Level42:
Another update....
Still have issues with the picture on the test monitor that I don't understand. I've hooked up both the +12v and +5v to the correct lines of the SCART, no improvement. This is WEIRD ! I'll try hook up the testmonitor to my Galaxian to verify it works OK.
However I could make out enough on the screen to see that I had yet another problem :-\
The trackball was only moving the archer up and right. If I turned left or right, the archer went right. If I turned up or down, the archer moved up. Did some schematic checking and got some help from the KLOV forum..... turns out there are 2 IC's that contain Schmitt-triggers on the PCB that process the signals that come from the optical boards. Since those were already replaced once on my PCB, they were on sockets. So I gave it a shot and switched them around. Now the archer was not moving at all.
This meant the problem had moved. One of those chips handles the direction signal (of both trackballs, for if it's in a cocktail) the other the clock signals. The clock signals make the archer move. The direction controls in which direction it moves.
In my original situation the direction chip was defective. When I switched them, the bad chip moved to the clock position, so now it didn't move at all. Probably, the direction now worked, but without clock signal there is no way of knowing it for sure.....
The IC's were 4584's (F10 and F11 on the PCB). Picked up 2 of them today. Replaced them and yes, it works perfectly :) Another problem on the PCB solved. That makes 3 :D
I guess the PCB is 100% now :)
I got a mail from Scott from Mamemarquees that the CPO is on it's way over the Atlantic, so I figured I'd start preparation of the CP for it. Got out the heat-gun to remove the original CPO. Even though it was damaged and worn, I still don't like to remove the original stuff...but gotta do what I gotta do :)
CPO is bare now. Need to sand it for the rusty area around the trackball. I think I will paint this one myself for cost reasons AND because the CPO is fully covering the CP. There are no visible CP parts, so the look of the paint is not terribly important. It's just for protecting it from rust.
shilmover:
--- Quote from: Level42 on December 08, 2007, 12:36:48 pm ---Another update....
Still have issues with the picture on the test monitor that I don't understand. I've hooked up both the +12v and +5v to the correct lines of the SCART, no improvement. This is WEIRD ! I'll try hook up the testmonitor to my Galaxian to verify it works OK.
However I could make out enough on the screen to see that I had yet another problem :-\
The trackball was only moving the archer up and right. If I turned left or right, the archer went right. If I turned up or down, the archer moved up. Did some schematic checking and got some help from the KLOV forum..... turns out there are 2 IC's that contain Schmitt-triggers on the PCB that process the signals that come from the optical boards. Since those were already replaced once on my PCB, they were on sockets. So I gave it a shot and switched them around. Now the archer was not moving at all.
This meant the problem had moved. One of those chips handles the direction signal (of both trackballs, for if it's in a cocktail) the other the clock signals. The clock signals make the archer move. The direction controls in which direction it moves.
In my original situation the direction chip was defective. When I switched them, the bad chip moved to the clock position, so now it didn't move at all. Probably, the direction now worked, but without clock signal there is no way of knowing it for sure.....
The IC's were 4584's (F10 and F11 on the PCB). Picked up 2 of them today. Replaced them and yes, it works perfectly :) Another problem on the PCB solved. That makes 3 :D
I guess the PCB is 100% now :)
I got a mail from Scott from Mamemarquees that the CPO is on it's way over the Atlantic, so I figured I'd start preparation of the CP for it. Got out the heat-gun to remove the original CPO. Even though it was damaged and worn, I still don't like to remove the original stuff...but gotta do what I gotta do :)
CPO is bare now. Need to sand it for the rusty area around the trackball. I think I will paint this one myself for cost reasons AND because the CPO is fully covering the CP. There are no visible CP parts, so the look of the paint is not terribly important. It's just for protecting it from rust.
--- End quote ---
I'm reading too... this info is especially important if I am going to pick up that Millipede. ;D
patrickl:
Wow, fixing these things is like a big electrical jigsaw puzzle. I guess that's half the fun huh? Having that collection of yours complete and working will be seriously cool 8)
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