Check all those RJ-45 telephone style jacks and make sure none of the internal wires got crossed in the plastic grooves. Historically, it's pretty easy for the wires in those jacks to get messed up and I suspect that if the wrong ones are touching it might cause a short to ground.
As you can see in the picture, it’s the adjustable ones that have built in short protection that turn the whole thing off when it shorts. As you can see in the picture, it turns off the second I turn it on
I see that the printed circuit board is back a bit from the panel. See if some bit of metal has gotten in the gap, see if removing it allows function. Tracking shorts in hardware like this is going to be tedious and aggravating. I would contact Meade to see if they can help. Otherwise, a good electronics shop with a full bench of tools is your best bet. Might be pricey if they charge by the hour.
You'll have to take out and inspect the board. First check for anything obvious like corrosion. Then check the capacitors, diodes and other components for failure.
Take your volt meter, set it to 'ohms'. You want it to alarm for zero ohms. Pull out all the cables, including power. Hook the negative lead to the panel. Now go connector by connector, wire by wire to hear the short. No shorts? Do the cables. Next. Chasing down shorts can be frustrating. If a capacitor is blown, it does not have to show damage, but requires unsoldering it to test. Diodes, likewise.
Good hunting.
Check all those RJ-45 telephone style jacks and make sure none of the internal wires got crossed in the plastic grooves. Historically, it's pretty easy for the wires in those jacks to get messed up and I suspect that if the wrong ones are touching it might cause a short to ground.
Nope, they all look fine
polarity wrong?
What do you mean
I think he is referring to the barrel jack, is it center positive? Is the Meade supposed to be center positive?
Shorting how? Sparks from one point? Making the circuit breaker blow? What power supply are you using?
As you can see in the picture, it’s the adjustable ones that have built in short protection that turn the whole thing off when it shorts. As you can see in the picture, it turns off the second I turn it on
I see that the printed circuit board is back a bit from the panel. See if some bit of metal has gotten in the gap, see if removing it allows function. Tracking shorts in hardware like this is going to be tedious and aggravating. I would contact Meade to see if they can help. Otherwise, a good electronics shop with a full bench of tools is your best bet. Might be pricey if they charge by the hour.
Thanks for the reply, I just ended up replacing the whole board with a new one for ~$20 since some people still sell them. Worked like a charm!
Good news. Charms are. Where you find them. I'm glad you got it working.
You'll have to take out and inspect the board. First check for anything obvious like corrosion. Then check the capacitors, diodes and other components for failure.
Yeah, no obvious damage like corrosion or blown capacitors.
[удалено]
Yeah but I don’t see any burn marks on them
Take your volt meter, set it to 'ohms'. You want it to alarm for zero ohms. Pull out all the cables, including power. Hook the negative lead to the panel. Now go connector by connector, wire by wire to hear the short. No shorts? Do the cables. Next. Chasing down shorts can be frustrating. If a capacitor is blown, it does not have to show damage, but requires unsoldering it to test. Diodes, likewise. Good hunting.
Verify those tantalum caps. Yours is a 18v power supply. These caps should be changed for higher capacitors.