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Title: The 27" k7500 Post by: BadMonkey on September 12, 2016, 02:12:12 pm Anyone have experience rebuilding these? I did a pretty complete rebuild on this. This is from a golden tee fore. Game plays blind. No neck glow on the monitor. No b+. So I rebuild the monitor: cap kit, flyback, transistors in the power supply, new ic's. Replaced a couple resistors that were open. Have not tried it yet as I am waiting for a metal oxide resistor from Mouser electronics. Have I missed anything? This is a shotgun obviously but my question is does anyone have experience with the k7500 27"? I see john is picking up a "ninja turtles" and I think it has the same monitor. Or the 7400...? My sons 11th birthday is this Saturday and I was hoping to have it active in the arcade.
Title: Re: The 27" k7500 Post by: BadMonkey on September 18, 2016, 10:28:50 pm So the monitor turned out awesome. I did get some arcing at first on transistor q704. I thought it was arcing through the insulator at first but I realized that it was going from the screw to the collector. I put some electrical tape over the top so that arcing could not occur. Of course I removed it and tested it first and the rest of the circuit. I won't go into great detail about it here but the base and emitter are grounded and so is the heat sink, the tape sounds redneck but it works. There were a lot of components that I had tested and some were bad that don't come in any kit. The voltages all look good and I ran it for a couple hours and played a few rounds. I was nervous about turning it on but it looks great.
Title: Re: The 27" k7500 Post by: John's Arcade on September 19, 2016, 09:42:12 am Congrats! Sounds like you did a complete rebuild!
Title: Re: The 27" k7500 Post by: BadMonkey on September 19, 2016, 10:12:10 am Almost. Didn't know how to properly test the ic's so I just replaced them.
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