Just Picked up a Galaga and it has only green for color

asteroidsNut

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Just Picked up a Galaga and it has only green for color

Just Picked up a Galaga and it has only green for color on the monitor. Any ideas?
 
Check the harness... check the inputs on the monitor...

Most likely the monitor though. If it is, this thread will be moved to the monitor repair section.

RJ
 
Poked around and found a few issues. You tell me if these could be the cause. However I did check the monitor harness. Reseated it checked for dirt and cleaned as needed, cleaned the edge connector (very dirty and corroded). Still no luck, all is green.

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Do you have a 2 board set or a 1 board set. On the original Galaga board there is a CPU and Video board and on that board you will see a 6 pin connector check the wiring there and check for broken traces. Pin1=Red * Pin2=Green * Pin3=Blue * Pin4= Sync to monitor * Pin5= ground * Pin6=N/C also make sure on your monitor no wires have come off of the chassis ot the tube neck just a place to start.
Your wires need to be repaired in your photos.
 
The question is it the monitor or the board.
If you swap the green video with red or blue video cable you will tell if it's the monitor or the the board.
If you swap the green with red you should have red on video. If it comes up green only still then it's a monitor issue. Most likely it the frist IC that gets the red blue and green signals is bad and needs to be replaced. Since two out of the three colors are out I think it's that IC and not the transistors that drive the video.

If the picture comes up red then it might be the board.
if it's a board issue try power down the machine
Look at the ic socket under the 6 pin video connector. 5N Pull the chip and carefully and clean the legs and carefully insert it back into the socket.

Good luck
 
It's a 2 board setup with the filter board on top of the CPU board. Video cable is good and no broken traces. A basic search around the chassis and all looks well.

As for wires, yes and I did find a broken wire at the edge connector. The wire goes to the small board on the wall. I guess I need to start with a new wiring harness and or fix this one with new connectors. Just have to do some research as to what tools will be needed (extractor, crimper, connectors, pins). One step at a time. I'm not even sure if I had a plan to keep this game or turn it. I hope (pray) it's not a money pit, then I will have to keep it.

Do you have a 2 board set or a 1 board set. On the original Galaga board there is a CPU and Video board and on that board you will see a 6 pin connector check the wiring there and check for broken traces. Pin1=Red * Pin2=Green * Pin3=Blue * Pin4= Sync to monitor * Pin5= ground * Pin6=N/C also make sure on your monitor no wires have come off of the chassis ot the tube neck just a place to start.
Your wires need to be repaired in your photos.
 
Thanks, I'll give this a try as soon as I fix some wiring harness issues (broken wires).

Rowland Heights - Not to far from me :) Do you do repairs or only a collector/hobbyist?

The question is it the monitor or the board.
If you swap the green video with red or blue video cable you will tell if it's the monitor or the the board.
If you swap the green with red you should have red on video. If it comes up green only still then it's a monitor issue. Most likely it the frist IC that gets the red blue and green signals is bad and needs to be replaced. Since two out of the three colors are out I think it's that IC and not the transistors that drive the video.

If the picture comes up red then it might be the board.
if it's a board issue try power down the machine
Look at the ic socket under the 6 pin video connector. 5N Pull the chip and carefully and clean the legs and carefully insert it back into the socket.

Good luck
 
I am a repair depo for my friends laughs. I do have 2 galaga uprights in my garage.
Don't ask me what my high score is I suck at playing it. I am in the process of collecting parts and peices to replace resister packs and sockets and recapping the board. I bought a box of boards that had a few galaga boards in them. So I am going to bring them back up to life.

If it's A monitor issue. Bruce down in anhiem use to have some WG 7400 In a strange frame. for 75. I think he he wants 85 for them now. But they are working with No burns with a remote board. Kool deal..

You can go with standard joysticks I see them for 20 to 35 depending on condition Most Galaga joysticks are built very well.
You can find the leaf switch here and there. Most of the time they just need a Little cleaning. A little plastic polish makes old buttons look like new.
CPO are available on Ebay. I bought two. I keep on saving up to buy the side art and kick plate but I keep getting distracted by other machines laughs.

Your machine is having a melt down issue. Which mean you going to have to adress what is going wrong with your machine. From what I can see the power supply is being over drawn Thus the burn marks on those diodes Bigger diodes. should run cooler. A little expoy on the board is a good idea. Fixing the traces is a good idea.
Recaping the motherboard, power supply and monitor always a great way to head off problems.
Replacing the sockets on the motherboard while it a pain to to will make your board stable for many more years to come.

Anything else? just ask or shoot me a PM..
 
Be very careful in replacing the sockets and resistor packs. While it will make it a MUCH more reliable board, it's something that must be done with great care.

While those factory sockets and the flat style resistor packs are very well known for causing all sorts of intermittent issues they aren't well known for being a PITA to desolder. It's easy to pull traces off the top of the board if you don't desolder the pins fully before trying to lift them.

Also, if you want to do this, I sell a kit on my web site that has all the 24/28/40/42 pin sockets and the resistor packs it in. Instructions are in the downloads section.

But, before you go down that path you have to figure out your color issue. The easiest way is to swap the red and green pins on the input to the monitor. If the color stays green you have a monitor issue. If the color switches to red then you have a board issue.

RJ
 
The Board tested good today on a test bench. Looked great. Messed around with the color controls on the neck board, I think it's called and got a small amount of red to show up. So I need a rebuild on the monitor, or better yet find a trade since this one has a good amount of burn-in. Thank you everybody for the help.. Also looking for a wiring harness as well, this one is beat up..
 
Be very careful in replacing the sockets and resistor packs. While it will make it a MUCH more reliable board, it's something that must be done with great care.

Carefully breaking the old sockets and the old resister pack will help in removing these parts. Wear safety glasses just in case of flying bits or resister packs.

Don't use cheap solder wick becuase is might over heat the board and cause lifting of traces.

On old boards like these getting a nice temperture regulated soldering iron is a good thing to have to prevent over heating and lifting of traces. Alternating which pins to work on will spread the heat and not concentrate in one spot. Smaller diameter solder will melt faster.

Just a few helpful hints.
 
I use Pace desoldering stations. :)

But then again... I've done a lot of component level board repairs over the years. I used to work at a grey market Apple repair depot fixing Apple II and Macs back in the mid 90s.

Sounds like the monitor has some weak/dead color guns. You should find someone nearbywith a CRT tester/rejuvenator that can give it a check.

RJ
 
I use Pace desoldering stations. :)

But then again... I've done a lot of component level board repairs over the years. I used to work at a grey market Apple repair depot fixing Apple II and Macs back in the mid 90s.

Sounds like the monitor has some weak/dead color guns. You should find someone nearbywith a CRT tester/rejuvenator that can give it a check.

RJ

I have three pace desoldering stations..I got rid of my weller one (POS) I dealt with a quiet a few other that really didn't keep up with the Pace ones.

I use to do nation wide computer repair when AST was as big as Compaq once upon a time. I have repaired thousands of boards, monitor, hard drive keyboads blah blah blah. LOL.

So Apple guy. Every heard of the Vista 8 inch controller? I know Richard and Keith some of the designer of it. Thier design was one of the few that sue happy apple could not come after (DMA floppy controller). Vista computer a division of ACP. The surplus shop I manage was one building east ACP ( Tom and Dave ).

Richard in fact wrote an DIY guide on how to install a 30 meg or 40 meg SCSI drive in an MAC once upon a time. LOL.
Sorry I know off topic. LOL

back on topic.

Now do you buy a cap kit and hope it fixes your problems....
Do you send out the board to get it fixed....
Do you buy one from bruces and modify to work in your cab.

Which ever choice you make you will get a learning experince from it.
and Learning new things keep you from getting old.
 
Nope... never heard of that controller...

As for the monitor issue, I think you have a bad tube. Find someone near you with a CRT Tester/Rejuvenator or try a local TV repair shop and have it checked/rejuvenated.

RJ
 
I have three pace desoldering stations..I got rid of my weller one (POS) I dealt with a quiet a few other that really didn't keep up with the Pace ones.

I use to do nation wide computer repair when AST was as big as Compaq once upon a time. I have repaired thousands of boards, monitor, hard drive keyboads blah blah blah. LOL.

So Apple guy. Every heard of the Vista 8 inch controller? I know Richard and Keith some of the designer of it. Thier design was one of the few that sue happy apple could not come after (DMA floppy controller). Vista computer a division of ACP. The surplus shop I manage was one building east ACP ( Tom and Dave ).

Richard in fact wrote an DIY guide on how to install a 30 meg or 40 meg SCSI drive in an MAC once upon a time. LOL.
Sorry I know off topic. LOL
.
back on topic.

Now do you buy a cap kit and hope it fixes your problems....
Do you send out the board to get it fixed....
Do you buy one from bruces and modify to work in your cab.

Which ever choice you make you will get a learning experince from it.
and Learning new things keep you from getting old.


You probably know my Father. He worked for Albert Wong, Safi Qushie, Tom Yuen...A.S.T
He starte there when there was only about 7 employees.
Jerry Harshman is his name
 
Better yet, I sold the game today. Made $125.00 profit. I'll look for another one with less work.

Nope... never heard of that controller...

As for the monitor issue, I think you have a bad tube. Find someone near you with a CRT Tester/Rejuvenator or try a local TV repair shop and have it checked/rejuvenated.

RJ
 
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