Hi,
I've got a dead 50" Mitsubishi Rear Projection that I'm trying to get working again. I'm familiar with rear projection monitors, but by no means an expert... I've fixed 4 so far, but none have been anything very complicated (one was a bad PIP card, another was just adjusted wrong, one had a cable loose, and the last needed the tubes rejuvenated). I'm very familiar with standard CRT monitors though, and good with electronics, and I know what I can and can't touch ;) .
Anyway, this one is on a Wave Runner arcade game (like:
I'm just looking for any ideas on what I can check. I've read about a bunch of problems with Mitsubishi monitors, mostly bad solder joints, bad capacitors, and blown HOT, but they're always specific about which capacitor is bad, and since this model is different, I don't know which capacitors to check (C914 is the one I always hear about, but I don't have a C914). I don't think the HOT is bad, since that should have blown a fuse, and there are no blown fuses.
I've already pulled the power board and inspected/resoldered the large pins, and that didn't help any... I've tried turning down the screen controls (I've had one that would shut down in the past if those were too high). I'm planning on resoldering the points on the flyback next, but I'd like some tips on a more systematic approach to troubleshooting this. What would cause the shutdown? I know on CRT monitors, a high B+ would cause it, but where do I measure the B+ at on these monitors?
I'd appreciate any help or tips anyone can give me. Thanks,
Pat