Working on TAF and could use a little help. It started out as the normal "check fuses 114/115" error and I've been tracking from there. What I've found is that fuse F114 is fine, F115 is blowing out. When I meter it there's a pull of about 1.7 amps on the fuse, obviously blowing the 3/4 amp fuse. If I disconnect J210, the power going to the WPC CPU board, the amperage draw drops to nearly nothing. I'd normally think it's a shorted switch somewhere but I've disconnected everything from the CPU board, all ribbon cables and switch connectors and just plug in J210 and the amperage jumps back up to 1.7 amps, blowing F115. So there must be a problem on the CPU board, any thoughts on what commonly goes on them to cause this symptom? Or better yet, tell me I'm wrong and I missed something stupid!

Thanks Pinside!
Brandon

That's exactly what I did. So your saying the 2803s are more likely to fail?

I suppose I should have explained my setup before posting this. I have an in-line fuse on my meter lead. I put the fuse in, set the meter to grab peak amperage and measure across the fuse holder. The circuit was still protected, in this case there was a max 1.7amp draw before the fuse blew. But yeah zaza, in your case there would be no protection.

And thanks John, 2803 was the issue and it's now socketed. I didn't realize they went bad that often!

It's an in line fuse, I put the correct fuse in it for the application. In this case a 0.75 amp fuse. The circuit is protected as it should be. There is no increased chance of damage to the circuit.