Galaga Monitor Blown? RCA 19VLTP22

postmortem01

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I'm assuming that the monitor is a compatible G07. There are no markings on the monitor except on the tube.

I just bought a really beat up Galaga last weekend. Nothing worked on it. The CP harness was cut up, etc. I disconnected the power supplies and connected a new power supply. I rewired everything from scratch. New connectors etc. I had everything put back into the cabinet and the picture up. I just started testing the functionality and SNAP POP! The monitor went out. I checked the monitor fuse. Blown. Also a small yellow flat capacitor (?) exploded like a party favor on the bottom of the monitor board.

This was not the original monitor in this cabinet. It was a used one from a Billiards game. Should I just replace the whole setup?

The cord from the monitor says "You must use a Isolation Transformer". Is that how I blew this up?

Did the fuse and capacitor go from age? It was working. The game still functioned (I heard audio).
 
Go to the monitor ID websites and look at the pictures to see what monitor you have. Monitors are frequently swapped out over the years so someone may have replaced the monitor in your cabinet.
 
Thanks Ken. Do you think that powering the monitor directly from AC power was the cause of the failure? There is a tag inside that reads "You must use an isolated transformer".
 
If you plugged a monitor that requires isolation directly into the wall then you likely fried a few components in addition to popping the fuse.
 
Yep, and that particular tube was used by the G07, K4600, and K4900 - so it could be either - or even one of the replacements that came out for them...
 
Gah..... Bummer. Okay. I did it. I fried the thing. Ugh. What components do I need to hook up and isolation transformer?

Can I just wire up my 120vac to this thing and connect the monitor to the secondary?

02-0010.JPG
 
Gah..... Bummer. Okay. I did it. I fried the thing. Ugh. What components do I need to hook up and isolation transformer?

Can I just wire up my 120vac to this thing and connect the monitor to the secondary?

Yep just wire the primary to the wall cord and the secondary to the monitor. Although if you previously plugged the monitor into the wall, depending on which monitor it is you probably have several components to replace. A couple of rectifying diodes at the very least.
 
Okay. This thing is ongoing. This is a long question.

I moved my Galaga over to my Ms Pacman Cocktail and connected the video cable to the Ms Pac monitor.

I get no picture. Is that due to no reference ground from one machine to the other?

Do I need the incoming AC ground to go to the isolation transformer to the game board to the monitor?
 
Okay. This thing is ongoing. This is a long question.

I moved my Galaga over to my Ms Pacman Cocktail and connected the video cable to the Ms Pac monitor.

I get no picture. Is that due to no reference ground from one machine to the other?

Do I need the incoming AC ground to go to the isolation transformer to the game board to the monitor?

No, but your Ms Pac monitor does need to be 'on' for it to display a picture. You DID have the Ms Pac machine on when you tried feeding it the Galaga video, correct?
 
Yes. disconnected the Ms. Pac video cable, connected the galaga video cable and powered both up. The Ms. Pac powers up and the galaga sounds go. I had picture before on the old monitor before it fried. I'm assuming that there is still video coming out of this thing.
 
I tested the 5vdc on that large capacitor thing next to the power plug....I'm reading 4.62vdc. Is that a possiblility why I have no video
 
Hello, I'm not trying to discourage you but you really need to supply more information if you are truly seeking help.
You need to post what monitor/s you are dealing with, what cabinets / games you're using. You'll need some preliminary knowledge as to whether or not the monitors are working and things like that. Post some pics of the problem you are having and it will help aid in the process. I'm sure you are aware of this but if you aren't very familiar with monitors you don't really want to be messing with them much until you have a good understanding of what is safe and unsafe.
 
I know what tube I have but I cannot identify the chasis. It's a DBQ. There has been some manual rewiring of the tube and chasis. That's why I'm having such issues. There are no stickers on the chasis at all. The board even has numbers removed.
 
I know what tube I have but I cannot identify the chasis. It's a DBQ. There has been some manual rewiring of the tube and chasis. That's why I'm having such issues. There are no stickers on the chasis at all. The board even has numbers removed.


Post a pic of the chassis. It should be easily identified.
 
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