A.G.I Disco 19" AGM-20M - First attempt at a monitor

Griffin

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A.G.I Disco 19" AGM-20M - First attempt at a monitor

I have an early Paperboy with a A.G.I Disco 19" Medium Res AGM-20M in it. On initial inspection it seems like it is an unusual configuration that doesn't follow the standard AGM-20M cap Map. This version only has a brightnes pot on the neck board, all the others are on the chassis board.

cabs005.jpg


Apparently the monitor would start up 50% of the time until it finally just didn't come on at all. When it did come on I am assuming the picture was fine as the guy who had it before would play it, this is the info I got from the last owner, so that's my starting point in this trouble shooting process.

There is no glow or whine from the monitor on power up even though everything else on the cab works fine.

So far on the restoration thread I have been recommended to look for bad solder joints on the board and chassis and fuses on the chassis board.

This is the first time I have ever touched a monitor, I don't have any prior experience in electronics, schematics, caps, diodes and circuit testing. I did go out and buy myself a decent multimeter and soldering station, so now I guess it's time to dive in and learn through problem solving.
 
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good luck on your first attempt at fixing monitors. disco is a pretty straight forward monitor to work on, your on the right track, resoldering and do a cap kit, bob roberts will sell you the correct one. check the fuse to see if its blown, it so then you can probably start looking to a new monitor since they dont make replacemnet flybacks for those monitors, but lets hope not.
 
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