WiiKnee
New member
So, I picked up a known "not working" upright Joust cab a couple days ago and cracked it open. I found a blown fuse at the service outlet, so I replaced it, everything else looked pretty good. It definitely looks like this vid has been sitting dormant for at least a few years.
Thump! It fires up – all three LEDs on the power board come on, video pops up, all tests indicate ok. Initial tests – after adjusting the horizontal hold, quadrant IV on the monitor is very blurry, the rest looks good. After a few minutes, I get a RAM ERROR 31 (or was it ROM?). I shut it down.
I notice burnt connectors coming into the power supply board from the transformer, so I rebuild them and power up. Wow! Everything comes up perfect, monitor looks strong, new batteries are holding their charge. I leave it on and play a few games for about 20 minutes.
Next day, I am playing with my son, the picture is jumping just a tiny bit and did a quick horizontal roll. As my son plays, I slightly adjust the hold, while adjusting the picture shrinks and squishes dramatically then returns to normal. A few seconds later *crack* *snap* - picture goes out, heavy smoke billows from the off-pcb flyback. I immediately shut down. What an awful smell!
Monitor chassis is a WG K4600; I assume the flyback is shot. I have some experience rebuilding Electrohome G07 units, but this looks nasty. The touchy adjustment for the hold makes me think that the daughterboard on the chassis has some bad solder point, but could this have caused a failed flyback? Looking online, it looks difficult and expensive to replace a flyback on a k4600 and recap the whole thing. And even if I do replace the flyback (~$70!), what caused it to blow in the first place and will it happen again?
So, I wonder what my options are. Attempt a questionable and expensive repair myself, send the chassis away for a costly and lengthy repair or exercise other options? I don't know what my other options are, though (hence my post). Can I plug in a new or rebuilt chassis into the tube, other than the K4600? Can I buy a modern replacement monitor that is plug and play? I am pretty new to vids, so I need all the advice I can get!
Thanks!
Chuck
Grand Rapids, MI
Thump! It fires up – all three LEDs on the power board come on, video pops up, all tests indicate ok. Initial tests – after adjusting the horizontal hold, quadrant IV on the monitor is very blurry, the rest looks good. After a few minutes, I get a RAM ERROR 31 (or was it ROM?). I shut it down.
I notice burnt connectors coming into the power supply board from the transformer, so I rebuild them and power up. Wow! Everything comes up perfect, monitor looks strong, new batteries are holding their charge. I leave it on and play a few games for about 20 minutes.
Next day, I am playing with my son, the picture is jumping just a tiny bit and did a quick horizontal roll. As my son plays, I slightly adjust the hold, while adjusting the picture shrinks and squishes dramatically then returns to normal. A few seconds later *crack* *snap* - picture goes out, heavy smoke billows from the off-pcb flyback. I immediately shut down. What an awful smell!
Monitor chassis is a WG K4600; I assume the flyback is shot. I have some experience rebuilding Electrohome G07 units, but this looks nasty. The touchy adjustment for the hold makes me think that the daughterboard on the chassis has some bad solder point, but could this have caused a failed flyback? Looking online, it looks difficult and expensive to replace a flyback on a k4600 and recap the whole thing. And even if I do replace the flyback (~$70!), what caused it to blow in the first place and will it happen again?
So, I wonder what my options are. Attempt a questionable and expensive repair myself, send the chassis away for a costly and lengthy repair or exercise other options? I don't know what my other options are, though (hence my post). Can I plug in a new or rebuilt chassis into the tube, other than the K4600? Can I buy a modern replacement monitor that is plug and play? I am pretty new to vids, so I need all the advice I can get!
Thanks!
Chuck
Grand Rapids, MI
