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Author Topic: WG K7000 25" Monitor problems  (Read 1497 times)

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returnZero

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WG K7000 25" Monitor problems
« on: October 25, 2010, 06:13:25 pm »
I bought a MK2 machine at auction for 65$. The game runs great as does the sound. The problem is that there is no video. When I first inspected the chassis I noticed that its fuse had blown. I have since replaced the flayback, H.O.T., and voltage regulator. The four diodes for the power supply are good. I still blow fuses every time I turn it on. I can't think that it's the monitor since there is no light in the bulb - nothing is even getting to the monitor since the board's fuse pops. Does anyone have any ideas? I am at a loss. The only thing that I can think it might be is the isolation transformer, but, at this point I am just shooting in the dark (I am fairly new to this, btw).

Ken Layton

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qrz

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Re: WG K7000 25" Monitor problems
« Reply #2 on: October 26, 2010, 10:12:20 pm »
and u didn't happen to forget the insulating hardware on that 2sd1398 ?  (AND same deal on the regulator IC..)
case is collector and MUST be insulated from grounded heatsink - use thermal pad or mica insulator w/heatsink compound.

might wish to check/replace C57 while ur in there  ;)